An air-operated pump, such as an air-operated diaphragm pump, includes a pump body, a process liquid pathway defined at least in part by the pump body, and an air pathway defined at least in part by the pump body, where the process liquid pathway and air pathway are fluidly separated from one another within the pump body. The pump further includes a leak detection and containment assembly integrated with the pump body and having a process liquid sensor configured to sense process liquid leaked from the process liquid pathway into the air pathway, and a shutoff valve communicatively coupled to the process liquid sensor and configured to close in response to the process liquid sensor sensing a process liquid leak to contain the leaked process liquid within the pump body and the assembly.
G01M 3/16 - Investigating fluid tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
A clamp band assembly. The assembly includes a semi-circular band with a concave inner surface shaped to mate with the pump and a convex outer surface. Each semicircular band has a coupling mechanism and a fastener for tightening the assembly. The coupling mechanism is attached at each end of the semi-circular band. The coupling mechanism has a saddle shape to mate with a curved surface of half-barrel nuts. The opposing ends are attached to the convex outer surface and have a curved profile that matches a curvature of the convex outer surface of the semi-circular band. A void is formed between the coupling mechanism and the convex outer surface. The fastener passes through the void of opposing coupling mechanisms and couples with the half-barrel nuts, applying a coupling force to each of the opposing coupling mechanisms and tightening the assembly.
An air-operated pump, such as an air-operated diaphragm pump, includes a pump body, a process liquid pathway defined at least in part by the pump body, and an air pathway defined at least in part by the pump body, where the process liquid pathway and air pathway are fluidly separated from one another within the pump body. The pump further includes a leak detection and containment assembly integrated with the pump body and having a process liquid sensor configured to sense process liquid leaked from the process liquid pathway into the air pathway, and a shutoff valve communicatively coupled to the process liquid sensor and configured to close in response to the process liquid sensor sensing a process liquid leak to contain the leaked process liquid within the pump body and the assembly.
G01M 3/16 - Investigating fluid tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
In one general aspect, the present application relates to a leak detection device that includes a body, a liquid separator, and a liquid level detector. The body includes an airflow inlet, an airflow outlet, and a liquid reservoir. The airflow outlet is arranged to substantially align with the airflow inlet. The liquid reservoir is formed in a bottom portion of the body. The liquid separator is positioned directly between the airflow inlet and the airflow outlet. The liquid separator divides an airflow path from the airflow inlet to the airflow outlet into at least two separate flow paths around the liquid separator. The liquid level detector is at least partially contained within a channel defined within a lower portion of the liquid separator, where the channel is in liquid communication with the liquid reservoir.
F16K 37/00 - Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
F04B 43/00 - Machines, pumps, or pumping installations having flexible working members
F04B 43/02 - Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
In one general aspect, the present application relates to a leak detection device that includes a body, a liquid separator, and a liquid level detector. The body includes an airflow inlet, an airflow outlet, and a liquid reservoir. The airflow outlet is arranged to substantially align with the airflow inlet. The liquid reservoir is formed in a bottom portion of the body. The liquid separator is positioned directly between the airflow inlet and the airflow outlet. The liquid separator divides an airflow path from the airflow inlet to the airflow outlet into at least two separate flow paths around the liquid separator. The liquid level detector is at least partially contained within a channel defined within a lower portion of the liquid separator, where the channel is in liquid communication with the liquid reservoir.
F04B 43/02 - Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
F16K 37/00 - Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
F04B 43/00 - Machines, pumps, or pumping installations having flexible working members
09 - Scientific and electric apparatus and instruments
42 - Scientific, technological and industrial services, research and design
Goods & Services
Electronic apparatus and instruments for the remote
monitoring, control and management of positive displacement
pumps and centrifugal pumps. Software as a service (SAAS) services featuring software for
the operation of positive displacement pumps and centrifugal
pumps.
A magnetically driven centrifugal pump has a pump case, an open vane impeller in the pump case, a stuffing box including a stuffing box outer being fixed relative to the pump case and a stuffing box inner threadedly engaged with the stuffing box outer, and a rotor axially fixed and rotatably mounted in the stuffing box inner. Bushings are arranged between the rotor and the stuffing box inner. A drive is fixed relative to the pump case and includes a drive output extending into the rotor. There is a magnetic coupling between the rotor and the drive and a canister fixed to the stuffing box and extending through the magnetic coupling to isolate the rotor from the drive. A rub ring closes the end of the stuffing box inner and constrains the drive output from damaging the canister under catastrophic bearing failure.
A pump assembly includes a pump and a base. The pump has mounts located at multiple positions on the pump to effect different configurations of the assembly. Each mount includes two engagements spaced apart on the pump. The base has a retainer constructed to slidably engage one engagement and a seat constructed to support the other engagement. The seat has a socket with two holes extending into the base. A bracket includes a jaw engageable with the second engagement and two locking pins extending from the bracket for sliding engagement with the socket. The locking pins retain the bracket and jaw from moving away from the base. A fastener engages the bracket with the base so the two locking pins cannot slidably disengage the socket.
F04B 43/02 - Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
F04B 45/04 - Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having plate-like flexible members, e.g. diaphragms
An air-operated pump, such as an air-operated diaphragm pump, includes a pump body, a process liquid pathway defined at least in part by the pump body, and an air pathway defined at least in part by the pump body, where the process liquid pathway and air pathway are fluidly separated from one another within the pump body. The pump further includes a leak detection and containment assembly integrated with the pump body and having a process liquid sensor configured to sense process liquid leaked from the process liquid pathway into the air pathway, and a shutoff valve communicatively coupled to the process liquid sensor and configured to close in response to the process liquid sensor sensing a process liquid leak to contain the leaked process liquid within the pump body and the assembly.
F04B 43/073 - Pumps having fluid drive the actuating fluid being controlled by at least one valve
F04B 45/04 - Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having plate-like flexible members, e.g. diaphragms
09 - Scientific and electric apparatus and instruments
42 - Scientific, technological and industrial services, research and design
Goods & Services
Electronic apparatus and instruments for the remote monitoring, control and management of positive displacement pumps and centrifugal pumps Software as a service (SAAS) services featuring software for the operation of positive displacement pumps and centrifugal pumps
A magnetically engaged pump includes a pump housing with a rotatable magnetic drive assembly, a cylindrical canister and a rotatable driven magnet assembly. This magnetic coupling is associated with a pump rotor and a laterally positioned gear wheel to define a gear pump. This magnetic coupling is alternatively associated with a pump rotor with an impeller to define a centrifugal pump. Either pump includes a stationary shaft to mount the driven magnet assembly and pump rotor. A rotatable carrier with bushings and thrust bushings coaxially supports the rotatable driven magnet assembly and pump rotor.
F01C 1/10 - Rotary-piston machines or engines of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
F04C 2/10 - Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
F04D 13/02 - Units comprising pumps and their driving means
F01C 1/24 - Rotary-piston machines or engines of counter-engagement type, i.e. the movement of co-operating members at the points of engagement being in opposite directions
F01C 1/063 - Rotary-piston machines or engines of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents with coaxially-mounted members having continuously-changing circumferential spacing between them
F01C 1/18 - Rotary-piston machines or engines of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with similar tooth forms
F04D 29/22 - Rotors specially for centrifugal pumps
A magnetically engaged pump includes a pump housing with a rotatable magnetic drive assembly, a cylindrical canister and a rotatable driven magnet assembly. This magnetic coupling is associated with a pump rotor and a laterally positioned gear wheel to define a gear pump. This magnetic coupling is alternatively associated with a pump rotor with an impeller to define a centrifugal pump. Either pump includes a stationary shaft to mount the driven magnet assembly and pump rotor. A rotatable carrier with bushings and thrust bushings coaxially supports the rotatable driven magnet assembly and pump rotor.
F04C 15/00 - Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups
F04C 2/10 - Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
F01C 1/063 - Rotary-piston machines or engines of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents with coaxially-mounted members having continuously-changing circumferential spacing between them
F01C 1/24 - Rotary-piston machines or engines of counter-engagement type, i.e. the movement of co-operating members at the points of engagement being in opposite directions
F01C 1/10 - Rotary-piston machines or engines of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
F01C 1/18 - Rotary-piston machines or engines of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with similar tooth forms
F04D 29/22 - Rotors specially for centrifugal pumps
A magnetically engaged pump includes a pump housing with a rotatable magnetic drive assembly, a cylindrical canister and a rotatable driven magnet assembly. This magnetic coupling is associated with a pump rotor and a laterally positioned gear wheel to define a gear pump. This magnetic coupling is alternatively associated with a pump rotor with an impeller to define a centrifugal pump. Either pump includes a stationary shaft to mount the driven magnet assembly and pump rotor. A rotatable carrier with bushings and thrust bushings coaxially supports the rotatable driven magnet assembly and pump rotor.
F04D 13/02 - Units comprising pumps and their driving means
F04C 15/00 - Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups
F04C 2/10 - Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
F01C 1/063 - Rotary-piston machines or engines of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents with coaxially-mounted members having continuously-changing circumferential spacing between them
F01C 1/24 - Rotary-piston machines or engines of counter-engagement type, i.e. the movement of co-operating members at the points of engagement being in opposite directions
F01C 1/10 - Rotary-piston machines or engines of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
F01C 1/18 - Rotary-piston machines or engines of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with similar tooth forms
A magnetically driven centrifugal pump has a pump case, an open vane impeller in the pump case, a stuffing box including a stuffing box outer being fixed relative to the pump case and a stuffing box inner threadedly engaged with the stuffing box outer, and a rotor axially fixed and rotatably mounted in the stuffing box inner. Bushings are arranged between the rotor and the stuffing box inner. A drive is fixed relative to the pump case and includes a drive output extending into the rotor. There is a magnetic coupling between the rotor and the drive and a canister fixed to the stuffing box and extending through the magnetic coupling to isolate the rotor from the drive. A rub ring closes the end of the stuffing box inner and constrains the drive output from damaging the canister under catastrophic bearing failure.
42 - Scientific, technological and industrial services, research and design
Goods & Services
Diaphragm pumps and pump diaphragms. Software as a service (SAAS) services featuring software for
the remote monitoring, control and management of diaphragm
pumps and pump diaphragms.
42 - Scientific, technological and industrial services, research and design
Goods & Services
Internal gear pumps. Software as a service (SAAS) services featuring software for
the remote monitoring, control and management of internal
gear pumps.
An air-driven pump includes a source of compressed air, a vacuum source including a venturi and two pump units with structurally independent pumping elements dividing pump chambers from air chambers. A directional control valve is in communication with the source of compressed air, the vacuum source, the pump unit air chambers. The directional control valve includes two valve positions alternating communication of the source of compressed air and the vacuum source with the air chambers. A pilot valve system shifts the directional control valve between the two valve positions at end of stroke positions of the pump and includes actuators extending into the air chambers to engage the pumping elements with the air chambers contracted.
F04B 9/137 - Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having plural pumping chambers the pumping members not being mechanically connected to each other
F04F 5/20 - Jet pumps, i.e. devices in which fluid flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids for evacuating
F04B 43/073 - Pumps having fluid drive the actuating fluid being controlled by at least one valve
F04B 9/12 - Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air
An air motor has a source of pressurized air, two air chambers, a pilot valve and a directional control valve. The spool of the directional control valve is of the unbalanced type and includes a piston surface in continuous communication with atmosphere through an exhaust port and a pressurized restricted port in alternating communication with the large end of the spool and the piston surface. The alternating communication of the source of pressurized air through the restricted port is restricted relative to the continuous communication of the piston surface with atmosphere. At the point of shift of the directional control valve, the piston surface is in communication with the source of pressurized air through the restricted port.
F04B 45/00 - Pumps or pumping installations having flexible working members and specially adapted for elastic fluids
F15B 11/10 - Servomotor systems without provision for follow-up action with only one servomotor in which the servomotor position is a function of the pressure
F15B 15/18 - Combined units comprising both motor and pump
F04B 43/073 - Pumps having fluid drive the actuating fluid being controlled by at least one valve
An elongate air operated pump includes a pump chamber, a bladder inside the pump chamber, inlet and outlet valves to and from the chamber and an air control system. The air control system includes a control valve alternately communicating compressed air and exhaust to atmosphere to a venturi with a first end, a second end and a throat port. The first end of the venturi receives continuous compressed air. The second end receives the alternately communication of compressed air and exhaust to atmosphere from the control valve. The throat port of the venturi is in continuous communication with the bladder to pressurize and draw a vacuum on the bladder. The valves may be pneumatic pinch valves controlled by the control valve to cycle with the bladder or passive one-way pump valves.
F04B 43/073 - Pumps having fluid drive the actuating fluid being controlled by at least one valve
F04B 15/02 - Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
An air-driven pump system comprising: a directional unit that defines a directional air chamber and comprises a directional piston, a first process air intake, and a second process air intake; two pump units each including a liquid chamber, an air chamber, and a piston; a shaft affixed to the pistons; an efficiency valve system comprising an efficiency piston, wherein the efficiency unit is configured to divide inlet air entering the air-driven piston pump into control air, first process air, and second process air, and wherein the efficiency piston is in communication with the control air, first process air, and second process air before the air is distributed to the directional unit; and a second shaft which is in communication with the efficiency piston. The efficiency valve system is to prevent overfilling of the air chambers.
F04B 9/131 - Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having plural pumping chambers with two mechanically connected pumping members
F04B 9/135 - Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having plural pumping chambers with two mechanically connected pumping members reciprocating movement of the pumping members being obtained by two single-acting elastic-fluid motors, each acting in one direction
F04B 9/133 - Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having plural pumping chambers with two mechanically connected pumping members reciprocating movement of the pumping members being obtained by a double-acting elastic-fluid motor
F04B 43/073 - Pumps having fluid drive the actuating fluid being controlled by at least one valve
F04B 35/00 - Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
A multi-stage expansible chamber pump system includes a HP pump unit, and first and second LP pump units. The LP units each include a LP air chamber and a pumped fluid chamber, separated by a piston. The HP unit includes left and right HP air chambers separated by a piston. Pistons are coaxial on a common piston rod for reciprocating movement in unison. A direction control DC valve includes a valve spool movable between first and second positions. The DC valve receives high pressure shop air as Control air and Process air. Control air moves the DC valve spool alternately to first and second positions. The DC valve, as determined by the position of the spool, directs Process air alternately to one side, then the other, of the HP unit, whereby the pistons reciprocate in unison to pump fluid through the fluid chambers.
F04B 35/00 - Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
A diaphragm assembly for a fluid driven diaphragm pump includes a piston having an inflexible core. This core includes a hub with a plate extending radially from about the periphery of the hub. The piston further includes a unitary diaphragm body molded with the inflexible core in situ. The unitary diaphragm body has a plurality of connective tendons extending through the plate. A thermoplastic coating extends about the inflexible core between the core and the molded unitary diaphragm body having a thermally miscible surface with the thermoplastic coating. An inflexible backing plate extends in juxtaposition with the diaphragm.
Rubber check valve sold as a primary component of air operated double-diaphragm pumps to permit the transfer of fluids containing abrasives or large solids, or fluids with high viscosity or coagulants
An air-driven pump system comprising an efficiency valve. One or multiple efficiency valves integral to the pumping system prevent overfilling of the air chambers, thereby reducing the amount of air used by the system while decreasing the energy wasted by the system.
F04B 9/131 - Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having plural pumping chambers with two mechanically connected pumping members
F04B 9/135 - Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having plural pumping chambers with two mechanically connected pumping members reciprocating movement of the pumping members being obtained by two single-acting elastic-fluid motors, each acting in one direction
F04B 9/133 - Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having plural pumping chambers with two mechanically connected pumping members reciprocating movement of the pumping members being obtained by a double-acting elastic-fluid motor
F04B 43/073 - Pumps having fluid drive the actuating fluid being controlled by at least one valve
F04B 35/00 - Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
An air driven diaphragm pump includes an performance control actuator having a housing with opposed air chambers. The pump includes pump chambers facing the air chambers and pump diaphragms extending between each air chamber and each pump chamber, respectively. The actuator further includes an air valve, an intake to the air valve and an engagement. The intake includes an intake passage and a performance control intake adjuster rotatably mounted. The intake adjuster has a helical channel and a closure element extending adjustably into the intake passage. The engagement engages the helical channel for control of the intake. The helical channel has varied pitch to provide a nonlinear relationship between rotation and axial advancement of the intake adjuster. The nonlinear relationship gives flow rate proportional to the angular rotation of the intake adjuster. The end points of the channel provide a practical minimum pump performance of about 40% of maximum pump flow rate and a maximum pump performance of about 97% of maximum pump flow rate.
F04B 49/00 - Control of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for in, or of interest apart from, groups
Positive displacement pumps for processing uncontaminated materials and parts specifically made therefor[; drum unloader systems comprised primarily of pneumatic pistons, including supports for the drums and follower plates that assist in the removal of products from the drums]
An expansible chamber pneumatic system, for example a fluid pump system, includes two or more double-acting diaphragm pumps, each with symmetrical left and right pump housings, each housing including an air chamber and a fluid chamber separated by a movable diaphragm. The diaphragms are connected for reciprocating movement in unison to pump fluid through their respective fluid chambers. Each pump includes an air valve actuated by Control air to direct Process air into one of the air chambers, simultaneously releasing used Process air from the other air chamber to thereby move the diaphragms, thereby to pump fluid. A pilot valve directs Control air to the air valve to position the air valve. The pilot valve is responsive to diaphragms reaching their travel limit in one direction to direct Control air to reverse the directions of Process air flow through the air valve to thereby reverse the movement of the pump diaphragms. Control air exhausts through the pilot valve to atmosphere. Process air exhausts through the air valve from one pump to become input or motive air for the next pump.
An air driven diaphragm pump includes two diaphragms affixed to a common shaft. The shaft extends through an air valve providing reciprocating pressurized air to the diaphragms through associated air chambers. A pump chamber with intake and exhaust valves is associated with one of the two diaphragms while a further air chamber replaces a pump chamber and is associated with the other of the diaphragms. A passage extends through the shaft and is in communication with the air chamber adjacent to the pump chamber and with the further air chamber converted from the pump chamber.
An air driven diaphragm pump includes an performance control actuator having a housing with opposed air chambers. The pump includes pump chambers facing the air chambers and pump diaphragms extending between each air chamber and each pump chamber, respectively. The actuator further includes an air valve, an intake to the air valve and an engagement. The intake includes an intake passage and a performance control intake adjuster rotatably mounted. The intake adjuster has a helical channel and a closure element extending adjustably into the intake passage. The engagement engages the helical channel for control of the intake. The helical channel has varied pitch to provide a nonlinear relationship between rotation and axial advancement of the intake adjuster. The nonlinear relationship gives flow rate proportional to the angular rotation of the intake adjuster. The end points of the channel provide a practical minimum pump performance of about 40% of maximum pump flow rate and a maximum pump performance of about 97% of maximum pump flow rate.
F04B 49/00 - Control of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for in, or of interest apart from, groups
F16K 47/00 - Means in valves for absorbing fluid energy
59.
Assembly and method for pre-stressing a magnetic coupling canister
An assembly for pre-stressing a canister within a magnetically coupled device having a housing body, a housing head and a canister connectable to the housing body, a pin and pin plate combination disposed between the housing head and the canister, and wherein the housing body, housing head, pin and pin plate combination and canister are adapted to cause the canister to stretch in a longitudinal direction when the housing head and canister are connected in sealing engagement with the housing body. A method of stretching a magnetic coupling canister also is disclosed.
B23P 11/02 - Connecting or disconnecting metal parts or objects by metal-working techniques, not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluidsConnecting or disconnecting metal parts or objects by metal-working techniques, not otherwise provided for by making force fits
B23P 21/00 - Machines for assembling a multiplicity of different parts to compose units, with or without preceding or subsequent working of such parts, e.g. with programme control
F04B 17/00 - Pumps characterised by combination with, or adaptation to, specific driving engines or motors
An air operated double diaphragm includes an air valve, air chambers, a center section between the air chambers, pump chambers and diaphragms between the air and pump chambers harnessed together with a piston rod. The air valve includes a statically dissipative body having a bore therein with a statically insulative liner in the bore. The statically insulative liner is fully enclosed within the statically dissipative body. A valve element is slidably positioned in the liner. The liner includes annular tenons to mate with annular mortises in the statically dissipative body and an end cap is used to close the valve cylinder.
F16L 7/00 - Supporting pipes or cables inside other pipes or sleeves, e.g. for enabling pipes or cables to be inserted or withdrawn from under roads or railways without interruption of traffic
Pumps, diaphragm pumps, diaphragms for pumps, air filters, mufflers, valves, air control valves, drum pump adaptors, parts for pumps, accessories for pumps, and fittings for pumps.
(1) Pumps, pump diaphragms, parts for pumps and accessories, namely air filters, mufflers, air control valves, and drum pump adaptors.
(2) Diaphrams pumps, pump diaphrams and parts for pumps.
