The invention relates to a trolley jack (1; 101; 201) comprising a main body (2; 102; 202) and a lifting element (3; 103; 303) that can be lowered and raised in order to lift a heavy object, and a lever assembly (4; 104; 204) which projects upwards along a longitudinal axis (5; 105; 205) and can be pushed manually by the user in order to move the jack (1; 101; 201). According to the invention, a lower end (4c; 104c; 204c) of the lever assembly (4; 104; 204) is hinged to the main body (2; 102; 202) along a transverse rotation axis (8; 108 208), and the lever assembly (4; 104; 204) can be lowered in relation to the transverse rotation axis (8; 108; 208) and placed against the main body (2; 102; 202). The provision of a hinged lever assembly increases the jack storage and transport possibilities.
The invention relates to a lifting jack (1) comprising a body (3), a base (2) and a support (4) for supporting a component and allowing same to be handled. According to the invention: the body (3) is telescopic and comprises a piston (5) for connecting the body (3) to the support (4); the support (4) comprises a rigid part (8) including a pawl provided with at least one pair of hooks (14) and joined to a flexible part (9) formed by a deformable material, in which both parts (8, 9) comprise holes (13, 10) of different diameters for receiving and retaining the piston (5) in two positions, namely a first position in which the support (4) receives the piston (5) through the hole (10) in the flexible part (9), and a second position in which the support (4) receives the piston (5) through the hole (13) in the rigid part (8).
The invention relates to a load-lifting device comprising a main body (2) including: at least one rear rolling element (7) located in a rear zone (8) of the device and actuated by the user in order to manoeuvre the device; at least one front rolling element (10) located in a front zone (11) of the device, closer to the force applicator than the rear zone (8); and an intermediate rotary rolling element (12) located between the rear zone (8) and the front zone (11) of the device and elastically connected to the main body (2), the centre of gravity of the device being disposed behind the intermediate rotary rolling element (12) such that, when loaded, all of the rolling elements (7, 10, 12) bear on the ground, while, when not loaded, the from rolling elements (10) do not rest on the ground, thereby improving the manoeuvrability of the device.
The invention relates to a hydraulic press (1) comprising: a structure (52) comprising at least one support (23) for supporting the hydraulic press (1) on the ground; a work bench (2, 53, 24) intended to house a set of parts, from which at least one part is separated or extracted using a compressive force exerted by the hydraulic press (1); a collection zone (6) positioned below the work bench (2, 53, 24) in order to receive the part separated or extracted from the set; and a shock absorber (54) connected between the work bench (2, 53, 24) and the structure (52), which can be can be expanded in order to raise the work bench (2, 53, 24) in relation to the structure (52) and compressed in order to lower the work bench (2, 53, 24) in relation to the structure (52) in a controlled manner.
B30B 1/32 - Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by plungers under fluid pressure
B30B 15/16 - Control arrangements for fluid-driven presses
B21D 5/02 - Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
B25B 1/24 - Details, e.g. jaws of special shape, slideways
B25H 1/14 - Work benchesPortable stands or supports for positioning portable tools or work to be operated on thereby with provision for adjusting the bench top
B23P 19/02 - Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformationTools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same
The invention relates to a bottle jack (1) comprising a main body (2) and a shaft (5) that expands and contracts, as well as comprising: a passage (12) establishing a communication between a hydraulic actuation circuit (6) and a discharge circuit (13), which is used for the controlled release of hydraulic fluid from the actuation circuit (6) and for the resulting downward movement of the shaft (5); a closure element (14) that is pushed elastically towards the passage (12) in order to prevent the release of hydraulic fluid therethrough; a push assembly (16) pushed elastically in the longitudinal backward direction (B) with a force greater than that with which the closure element (14) is elastically pushed against the passage (12); and a telescopic lever assembly (36) that can be lowered by a user in order to actuate the hydraulic actuation system.
The invention relates to a hydraulic jack (1, 1') comprising a main body (2), a pivotably connected lift rod (3) and a hydraulic cylinder (4) connected to the main body (2) by a first pivot connection (5) and to the lift rod (3) by a second pivot connection (6). According to the invention, the hydraulic jack (1, 1') comprises a lever element (7, 7') including at least one locking area (14) which receives an element secured to the lift rod (3) and which acts as a stop, said lever element (7, 7') being pivotably connected to the first pivot connection (5). The aforementioned element secured to the lift rod (3), which acts as a stop and can be received in the at least one locking area (14), is included in the second pivot connection (6). Hence, the invention provides a mechanical interlocking system which provides optimum operation and minimises the number of components required.
The invention relates to a hoisting device (1) provided with a hoistable element (4) and a hydraulic system (5), comprising a mechanical interlocking system including at least one locking element (7) articulated with a free end of a mobile rod (5b) of the hydraulic system (5). According to the invention, the locking element (7) comprises an inner groove (8) along which a protrusion (9) can move, said protrusion being solidly connected to a stationary part (5a) of the hydraulic system (5). The inner groove (8) is provided with at least one recess (10) which can house the protrusion (9) in order to lock the hoistable element (4) in different positions. The centre of gravity of the locking element (7) is disposed such that, in the unlocked position, an imaginary line, linking the centre of gravity with the articulation between the free end of the mobile rod (5b) and the locking element (7), forms a given angle with the vertical. The interlocking system locks automatically and is easy to use.
Hydraulic jack (1), with a main body (12) and an articulated elevator arm (2), provided with safety mechanisms so that the load on the jack does not fall in the event of a hydraulic failure. The jack comprises a lever element (5) that rocks with respect to the main body (12), actuated by a spring (13) in a blocking direction (A) and capable of being actuated in an unblocking direction (B) by means of an actuable zone (7). The lever element (5) comprises a first curved zone (10) and a second curved zone (11) that are separated by a step (8). The elevator arm (2) comprises a rotary stop (9) designed to roll along the first curved zone (10) or the second curved zone (11) when the elevator arm (2) turns and designed to lock on the step (8) in order to block the elevator arm (2) and prevent turning thereof in a downward direction.
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