The fastening device (1) for towing vehicles comprises: one main body (2) comprising one housing seat (3) for an apparatus to be towed; one fastening element (7) associated in a movable manner with the main body (2) between at least one release configuration, in which it releases the housing seat (3) to allow the insertion/removal of the apparatus to be towed, and at least one engagement configuration, in which it obstructs at least partly the housing seat (3) to prevent the removal of the apparatus to be towed; one control lever (10) connected at least in rotation to the fastening element (7) around a first axis (X), and movable with respect to the main body (2) to displace the fastening element (7) from the engagement configuration to the release configuration and vice versa, the control lever (10) being further movable between a locking position, in which it operates in conjunction with the main body (2) to keep the fastening element (7) in the release configuration, and a home position, in which it is movable with respect to the main body (2) to allow the displacement of the fastening element (7); where the control lever (10) is movable in rotation with respect to the fastening element (7) around at least a second axis (Y) which is transverse to the first axis (X), to displace from the locking position to the home position and vice versa, where the first axis (X) and the second axis (Y) are incident with each other.
A surgical instrument (10) for scraping and collecting bone particles, comprising: a gripping handle (20); a blade (30) supported by the handle (20); and a collection chamber (40) of particles scraped by the blade (30), wherein the blade (30) comprises a plurality of cutting edges (320) separated from each other.
The instrument comprises an elongate handle (10), having a distal end bearing a blade (20) having a scraper face (21) and an external scraping edge (22), projecting transversally externally with respect to the distal end, and a collecting compartment (30) of the scraped material. The collecting compartment (30) has a tubular shape and comprises a collecting chamber (31) having a constant transversal section and a distal end (32) which has a mouth (34) communicating with outside. The collecting compartment (30) is constrained to the handle (10), and is able to assume two different operating configurations: a first operating configuration in which the compartment (30) directly rests against an internal face (13) of the handle (10), with the distal end (32) thereof located adhering to the distal end (11) of the handle and facing the scraping face (21) of the blade, in proximity of the scraping edge (22), so as to receive the scraped material in inlet, and a second operating configuration in which the compartment (30) is located at a distance from the distal end (11) of the handle and a mouth (34) thereof is located distant from the blade (20) and from the handle (10). Lastly, a piston (50) is associated to the collecting compartment (30) having a rod (51 ) which slides along the chamber (30) of the compartment and an activating plunger (52) which projects from the chamber at the proximal end of the compartment.
The process includes a die comprising a bottom die (10) and a male part (20) able to close the cavity in such a way as to define a closed forming chamber (F). The bottom die (10) has an upper mouth that delimits the cavity (15), having an open upper surface substantially open in an upwards direction and a lateral surface internal of the cavity of the bottom die and forming an angle with the upper surface. The male part (20) has a central portion (21) able to close the surface of the cavity (15) and a peripheral edge able to adhere to the upper surface of the upper mouth, such as to realize a closing of the forming chamber only by means of contact along the upper surface, the peripheral edge lacking a vertical surface able to slide snugly contactingly with the lateral surface of the upper mouth (11). The process comprises: inserting a batch of non-spongy/foam thermoplastic material having a greater density than 0.9 Kg/dm3, in the solid state and in small pieces, into the cavity of the female component, supplying heat to the parts of the die, up to producing at least a partial melting of the batch located in the cavity of the die, nearing the two parts of the die to one another, by action of a thrust able to deform the batch in the at least partially molten state, the movement leading to a reduction of a distance between the upper mouth and the peripheral edge up to reciprocal contact thereof.
The process includes a die comprising a bottom die (10) and a male part (20) able to close the cavity in such a way as to define a closed forming chamber (F). The bottom die (10) has an upper mouth that delimits the cavity (15), having an open upper surface substantially open in an upwards direction and a lateral surface internal of the cavity of the bottom die and forming an angle with the upper surface. The male part (20) has a central portion (21) able to close the surface of the cavity (15) and a peripheral edge able to adhere to the upper surface of the upper mouth, such as to realise a closing of the forming chamber only by means of contact along the upper surface, the peripheral edge lacking a vertical surface able to slide snugly contactingly with the lateral surface of the upper mouth (11). The process comprises: inserting a batch of non-spongy/foam thermoplastic material having a greater density than 0.9 Kg/dm3, in the solid state and in small pieces, into the cavity of the female component, supplying heat to the parts of the die, up to producing at least a partial melting of the batch located in the cavity of the die, nearing the two parts of the die to one another, by action of a thrust able to deform the batch in the at least partially molten state, the movement leading to a reduction of a distance between the upper mouth and the peripheral edge up to reciprocal contact thereof.
A compression forming process includes use of a die comprising: a bottom die (10); a punch (20), mobile with respect to the bottom die (10); an air escape route from the bottom die (10). The process comprises following steps: a) inserting a batch of material in a form of small pieces in the cavity of the bottom die, b) nearing the two parts of the die to one another, up to defining a forming chamber, c) supplying heat to the particles of the batch, during step b), by heating the internal surfaces of the chamber of the bottom die and the punch, increasing a degree of fluidity of the particles with growing values over a period of time, starting from a minimum value at the start of step b) up to a maximum amount, at the end of step b). In step c) the process comprises heating the particles of the batch in a differentiated way so that the particles located at the upper internal surface (21, 31 ) are brought to values of fluidity, growing over time, with a delay with respect to the particles located at the lower internal surface (11).
B29C 33/10 - Moulds or coresDetails thereof or accessories therefor with incorporated venting means
B29C 44/04 - Shaping by internal pressure generated in the material, e.g. swelling or foaming for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities
An apparatus includes one or more die groups which are movable independently of one another, each including a female part having a matrix cavity and a male part destined to penetrate into the cavity such as to define a forming chamber of the product, the cavity configured to contain a batch of material. The apparatus further includes a heating station having a heater to bring the plastic material to the fluid state, and a die group cooling station downstream of the heating station. The die groups are free to be cyclically inserted in the heating station and subsequently transferred to the cooling station. A thrust group is associated to a respective die group and is configured to provide a thrust for penetrating the male part into the cavity during the stage of forming the product, the thrust group being integral with the respective die-group in displacements during the operations performed.
B29C 43/00 - Compression moulding, i.e. applying external pressure to flow the moulding materialApparatus therefor
B29C 43/04 - Compression moulding, i.e. applying external pressure to flow the moulding materialApparatus therefor of articles of definite length, i.e. discrete articles using movable moulds
A syringe for injecting solid, hard and rough granular material, having diameters comprised between 0.1 and 1.5 mm, comprising: a longitudinal injection chamber (10) having constant section and an internal diameter (Dc) of less than 4.5 mm, having a distal outlet mouth (1 1 ) for the flow out of the material, whose surface is the same as the injection chamber (10), and a proximal mouth (12), in which granular material is inserted; a plunger (20) sealedly mobile along the injection chamber (10), joined to a stem (21 ) which enters the injection chamber (10) through the proximal mouth, the plunger (20) having a transversal section which sealingly couples with the surface of the injection chamber (10), and having an operative surface (22), facing towards the distal mouth (1 1 ) of the injection chamber (10), suitable for pushing the material along the injection chamber (10), characterised in that it comprises a body (24) projecting longitudinally internally of the injection chamber (10), fixed substantially axially to the operating surface (22) of the plunger (20), having a diameter (Ds) that is less than 70% of the diameter (Dc) of the injection chamber (10) and a length (Ls) that is greater than 6 mm.
B05C 17/005 - Hand tools or apparatus using hand-held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material through an outlet orifice by pressure
The apparatus comprises one or more die groups (10) which are free, mobile and movable independently of one another, each of which comprises: a female part (12) having a matrix cavity (M) and a male part (13) destined to penetrate into the matrix cavity (M) such as to define a forming chamber (F) of the product, the matrix cavity (M) of the female part being destined to contain a batch of material. The apparatus further comprises at least a heating station (30) having at least a heating means destined to heat the die group (10) up to bringing the plastic material contained therein to the fluid state, and at least a cooling station (35) destined to cool the die group (10) located downstream of the heating station, wherein the die groups (10) are mobile and free to be cyclically inserted in the heating station and subsequently transferred therefrom to the cooling station. The invention comprises thrust groups, each of which is associated to a respective die group (10) and is destined to provide a thrust for penetrating the male part (13) into the matrix cavity (M) during the stage of forming the product, the thrust group being mobile solidly with the respective die-group (10) in displacements thereof during the operations performed in the heating and cooling stations and during transfer from a station to another. The invention enables economically advantageous realisation of products having a uniform and compact mass, even with relatively large dimensions (masses of above 1 kg). Further, thanks to the relatively small mass, relatively very light die groups can be realised which are therefore easily movable and manipulatable in a mechanised way. Further, the necessary equipment can be relatively inexpensive.
B29C 43/04 - Compression moulding, i.e. applying external pressure to flow the moulding materialApparatus therefor of articles of definite length, i.e. discrete articles using movable moulds
B29C 33/34 - Moulds or coresDetails thereof or accessories therefor movable, e.g. to or from the moulding station
The invention relates to a die which comprises a female part (2) having a matrix cavity (M) comprising two complementary and couplable sections, in which a first section (10) has a first cavity (15), which wholly or partly defines the matrix cavity (M) of the female part, and has walls (11, 12) which are relatively slim; and a second section (20) having a substantially non- deforming structure comprises a second cavity (25) destined to contain and adhere to the external surface (11a, 12a) of the first section (10). Also comprised is a heating means, separate and located at a distance from the second section (20) of the female part. The method comprises: completely extracting and distancing the first section (10) from the second section (20) of female part, inserting a batch of material internally of the cavity (15) of the first section (10), subjecting the batch contained in the cavity (15) of the first section (10) to the action of the heating means for raising the temperature thereof up to bringing the batch into a liquid or semi-liquid state, the first section (10) being located at a distance from the second section (20) of female part; and successively inserting, in mutual contact, the first section (10) in the second section (20) of female part, the batch being in the liquid or semi-liquid state, and subjecting the female part to the penetration of the male part internally of the relative forming cavity (F), for forming the object.
A surgical bone milling instrument, suited to operate in a hole formed in a bone, comprising a milling element (10), with longitudinal axis (A) and with the forward end portion (11) rotating around a longitudinal axis (A), and milling the bone. The instrument comprises a tubular element (30) of circular external cross-section and provided with a thread engaging, by helical coupling, a hole formed in the bone. The milling element (10) is associated with the tubular element (30), arranged so that the forward end portion (11) thereof is located ahead of the tubular element (30) andcan rotate around the longitudinal axis (A) thereof and translate axially relative to the tubular element (30). The milling element (10) has a rear portion (14) which passes coaxially through the tubular element (30), while the forward end portion (11) projects beyond the front of the tubular element (30). The milling procedure of a bone cavity can be completed while maintaining control of the position of the device relative to the hole. Furthermore, in each phase in which the milling element is rotated, while the instrument is axially stationary inside the hole, a groove is created on the end of the hole (or an extension of the entire hole) the depth of which is constant and predetermined. Further, by way of axial pressure applied to the milling head by the drive element, a detachment of residual bone wall can be achieved as soon as this has reached a breaking resistance which is lower than a force applied by the drive element.
A surgical bone milling instrument, for operating in a hole formed in a bone, comprising a milling element (10) having a longitudinal axis (A) and a forward portion rotating around an axis (A) for milling bone. The instrument comprises an elongate probe element (20) located internally of and being coaxial with a milling element (10), and sliding longitudinally through the milling element (19), with a forward portion projecting relative to a forward portion of the milling element (10). Means are provided for axially pushing the probe element (20), with the forward portion thereof being made to project beyond the forward portion of the milling element (10). With the invention it is possible to complete the milling procedure of a bone hole, maintaining control of the position of the device relative to the hole. The action of the probe element enables an operator to perceive, also visually, the moment in which the milling head of the instrument reaches the end of a previously- formed hole, or the end of the cavity excavated by the milling head. Operations of further axial advance of the milling head can be monitored with the probe element. Furthermore, by way of axial pressure applied to the probe element, the detachment of the residual bone wall can be achieved as soon as this has reached a breaking resistance lower than the force applied by the probe element.
