Abstract: A safety brake for hydraulic rams, particularly for hydraulic elevators, includes a plurality of braking members disposed around the piston in a circular array. The outer surfaces of the spaced apart braking members together form the shape of a truncated cone, and the inner surface of a stationary housing surrounding the brake members is complementarily shaped. The angle of inclination of the two conical surfaces is small, and the braking members move downwardly and inwardly only a short distance to engage the piston, so that the conical geometry of the brakes and housing surfaces does not produce significantly mismatched sliding surfaces as the brake members move downwardly.

Abstract: The invention concerns a sliding caliper disc brake.The brake comprises a caliper (14) which is mounted slidably on a fixed carrier (10) by at least one axial pin (16) cooperating with a bore (47) formed in the caliper. The bore (47) is provided with a sleeve (46) having a resilient projection (54) which extends radially into a recessed portion (58) of the pin (16) to act as a unidirectional stop which can resiliently assume an inoperative position upon assembly of the brake and thus to prevent the caliper and the fixed caliper becoming separated from each other when preforming operations such as changing the friction elements. In the construction illustrated, the sleeve (46) is made of resilient material and the projection (54) is integral with the sleeve.The invention is provided for braking motor vehicles.

Abstract: A cylinder structure and method for rapidly evacuating a cylinder without contamination thereof. The structure comprises a hollow cylinder, a piston mounted in the cylinder for axial reciprocation, a hollow piston rod secured to the piston for movement therewith extending out of one end of the cylinder, a seal between the one end of the cylinder and the piston rod, and a radial opening through the hollow piston rod between the piston and seal for evacuating the space between the cylinder, piston, piston rod and seal during reciprocation of the piston within the cylinder. The method includes the step of evacuating the space between the cylinder, piston, piston rod and seal through the piston rod during reciprocation of the piston within the cylinder.

Abstract: A compactly sized spring-applied electromagnetically released radial face friction brake, with a ball-pocket torque booster producing increased torque capacity is disclosed. The friction brake is released by energization of an electromagnetic coil attracting an axially movable armature, which nullifies the spring operator force to release the brake. The friction brake includes a driving hub having a plurality of bosses which engage a plurality of slots in a rotatable member to be braked. Thus, the driving force from the hub is distributed to the rotatable member so that both brittle and nonbrittle friction materials can be used to form the rotatable member. In addition, a collar is provided to limit the axial movement between the armature and the stationary ferromagnetic housing which contains the electromagnetic coil therein. Thus, as the friction surface on the rotatable member wears away, the magnetic air gap cannot become so great as to prevent brake disengagement.

Abstract: A gas spring for height adjustment of drawing-tables or the like includes an arrangement for hydraulically locking the gas spring against sudden collapse due to overloading or loss of internal gas pressure. The hydraulic locking mechanism includes a pressure responsive valve which operates, in response to an excess pressure differential between the gas spring cavity and the pressurized gas chamber, either to prevent flow of the hydraulic locking medium out of the cylinder cavity or to restrict such flow to a slow, safe rate.

Abstract: A hydraulic damper comprising a tube with a bottom end thereof closed for containing hydraulic oil therein, a piston slidably fitted in the tube and partitioning the tube into upper and lower chambers which are filled with oil, a piston rod having one end thereof being secured to the piston by a hollow nut having a cavity opening to the lower chamber therein which is located on the side of lower chamber and the other end thereof projecting to the outside through a rod guide and sealing member which are fixed to the upper end of the tube and which seal the upper end of the tube, a pressurized gas chamber provided on the side of the lower chamber for compensating the changed volume of the piston rod within the tube, a first communicating path provided in the piston for communicating the upper and lower chambers, a second communicating path which serves to communicate the upper and lower chambers via the cavity provided in the hollow nut and which is provided in the piston rod on the side of the piston and the h

Abstract: A disc brake including a friction pad disposed on one surface of a rotatable disc and being slidably supported on a guiding portion. A pad spring presses the friction pad against the guiding portion in the direction radially inwards with respect to the axis of the disc and in one direction along the circumference of the disc.

Abstract: A shock absorber comprising a cylinder, cylinder head having a relief check valve therein including an annular valve spool, relief valve ball, spring support, valve spring and valve cap, piston, piston head, outer case, foot valve body, dust cover, piston bellows and pivot bushing assemblies.

Abstract: An anchor pin assembly (100) for a drum brake (10) is provided. The anchor pin assembly is mountable to a drum brake spider (14) provided with an anchor pin receiving bore (34). The assembly includes two anchor pin pieces (102 and 104) having inclined ramps (116 and 118) formed on the inner ends thereof, an expansion member (120) having mating ramps (122 and 124) formed thereon and a bolt (132) and nut (138) for applying an axially inward compressive force to the pieces to cause radially outward expansion of the expansion member.

Abstract: A power cylinder unit, adapted for use in truck mounted, self-aligning railway freight car tread brakes comprises a housing, a bulkhead which seals the housing, and a rigid, but moveable piston rod. The housing includes an annular bearing adapted to provide lateral support for piston rod and a spring which urges the piston toward the bulkhead. The combination of the housing, the bulkhead and the piston head define a gas-tight space to which the brake operating compressed air is passed. The piston head includes three circumferential grooves adapted to receive a bearing ring, a fluid sealing ring and a lubricating ring. The cylinder may be eccentrically mounted.

Abstract: In a disc brake a piston is axially slidably mounted within a cylindrical space in a cylinder with an opening in the end of the cylinder communicating with the space. The piston is arranged to move axially through the opening and to press a friction pad into engagement with a disc. The piston is in sliding contact with the surface of the space in the cylinder body. A boot protector covers a boot extending between the inside of the cylinder body and the piston. The boot protector is formed, in part, of a rigid ring body fixed to the opening in the cylinder body in which the piston is housed and of an elastic ring body secured to the inner circumference of the rigid ring body. The boot protector covers the surface of the boot facing toward the disc. The boot covers the surface of the piston disposed in sliding contact with the surface of the cylinder.

Abstract: A drum brake assembly includes a pair of brake shoes (16, 18) which are movable by a hydraulic actuator (14) to a braking position. A parking brake lever assembly (24) is operable to also move the pair of brake shoes to the braking position. An anchor assembly (40) is attached to a backing plate (12) and is engageable with the pair of brake shoes to either absorb braking torque during a service brake application, or impart movement from one brake shoe to the other during a parking brake application. The anchor assembly includes a connecting member (44) engageable with the pair of brake shoes and rotatable in response to operation of the parking brake lever assembly to a released position on the anchor assembly (40).

Abstract: A brake mechanism (10) operable to maintain an air operable control drive mechanism (12) in position in the event of failure of the air supply is disclosed. A first rack section (22) is attached to a control lever (16) of the control drive mechanism (12) and is engagable in any operable position of the control lever (16) by a second arcuate rack section (24). A compression spring (62) acting on a toggle mechanism (28) biases the racks into engagement, and an air cylinder assembly (26) acting on the toggle mechanism (28) against the compression spring (62) maintains the second rack section (24) out of engagement with the first rack section (22) so long as the air supply to the air cylinder assembly (26) is maintained.

Abstract: A vehicle seat having a seat base frame (10) mounted on cross rails (12) is provided with a height adjustment mechanism comprising a pair of generally U-shaped leaf springs (14) which constitute the sole support for the seat on the crossrails (12). The leaf springs each have a pair of oppositely inclined upstanding tongues (18) connected to the seat base frame through pin and slot connections (32, 34) and, adjacent their upper ends, each pair of tongues (18) is connected by a rod (37) which serves both to stiffen the tongues (18) and also to effect adjustment of their inclination so as to vary the height of the seat base (10) above the rails (12).

Abstract: A mounting arrangement for use in a floating-caliper spot-type disc brake including a carrier component and a caliper component, for mounting on one of the components a guide bolt which is slidably received in a bore of the other component, includes a recess in the one component for partially receiving the bolt, this recess being open, over its entire axial length, onto the periphery of the one component to provide a free path for the movement of the bolt into and out of the recess. The bolt and the one component have cooperating abutment surfaces either within or outside the recess, which prevent the bolt from turning about its longitudinal axis once properly received in the recess. The abutment surface of the bolt may be provided either on a key-bit-shaped or on a cross-sectionally polygonal, especially square, portion of the bolt.

Abstract: A mechanical lock of the type in which axial translational movement of a rod is prevented by a coil spring which encircles the rod and grips it and being readily released by application of a relatively small force through a relatively short stroke, thereby permitting the mechanical lock to be controlled by a pushbutton control. Rotating bushings adjacent the ends of the springs have beveled faces which cause the locking turns at the ends of the spring to become cocked on the rod to provide a true locking action. The device is unlocked by rotation of the rotating bushings, which unwind the locking turns of the spring, thereby releasing the grip of the spring on the rod. The rotating bushings are rotated in opposite directions by actuating levers which extend outside of the housing of the device. The actuating levers are provided with rollers and are located at the same station along the axis of the rod.

Abstract: A spring assembly comprising a base frame, a grid frame, coils connected at their lower ends and upper ends to the respective frames wherein the grid frame is provided with crossing longitudinal and transverse wires so positioned as to enable spacing the coils transversely of the grid frame at a uniform spacing and wherein the longitudinal wires of the grid frame are provided with deviations for receiving diametral portions of the coils and retaining the latter from movement relative to the grid frame.

Abstract: In a pallet lift truck having a base, an upright axle shaft, a wheel fork and a transverse axle mounting a pair of spaced resilient wheels, and a normally upright steering handle pivoted at one end to the base. A mechanical brake assembly comprises a brake housing with downwardly opening slots positionable over and removably mounted upon the axle between the wheels. An upright brake arm extends into and is pivotally mounted upon the brake housing and includes a brake bar projecting therefrom overlying and spaced from the wheels and normally biased to an inoperative position. A brake actuator boss upon the steering handle on downward pivoting thereof operatively engages the brake arm moving the brake bar into operative compressive frictional engagement with the wheels.

Abstract: A rubber vibration isolator is disclosed, which comprises a pair of upper and lower liquid chambers capable of changing volumes by elastic deformation of an annular rubber elastomer accompanied with longitudinal vibration, a restricted passage for communicating these chambers with each other, at least two liquid chambers formed in the outer periphery of the elastomer and capable of changing volumes accompanied with lateral vibration, and another restricted passage for communicating the latter chambers with each other.

Abstract: A brake actuator comprises a piston working in a cylinder with a seal carried by the piston for engagement with the outermost wall of the cylinder and a seal housed in the innermost wall of the cylinder for engagement with the piston. Each seal is of triangular outline and is received in a seal-receiving groove which has first and second relatively inclined end walls with which faces on the seal are in full facial engagement, and a sealing region for engagement with the wall of the cylinder or the piston is defined by and between the third remaining face and the adjacent face of the seal. A space is provided between the second end wall and the third face to accommodate any deformation of the material of the seal which is otherwise confined between the piston and the cylinder.