Abstract: Assembly of a servomotor (10), such as a brake booster sevomotor, on a motor-vehicle bulkhead is performed by fixing, on the rear side of the srvomotor and on the bulkhed, two pairs of plates (16a, 16b; 18a, 18b) which project towards each other and are parallel with each other and with the axis of the servomotor. These plates are rigidly joined together by at least one screw/nut assembly, the nut (24a, 24b) of which is welded onto one of the plates and the screws (26a, 26b) of which pass through the plates in a direction perpendicular to the axis of the servomotor, the plates being accessible from the outside. Advantageously, the plates (16a, 16b) connected to the servomotor have at least one coupling member (20a20b) designed to cooperate with notches (22a, 22b) formed on the top edge of the plates (18a19b) connected to the bulkhead, in order to allow positioning of the servomotor relative to the latter.
Abstract: Located in a stationary frame is a cylinder-piston unit, the piston of which is adapted to displace the bearing housing of a roll in a paper-making machine at right angles to the longitudinal axis thereof. The bearing housing is guided in the frame with the aid of linear guide-elements. The radial play between the piston and the cylinder-bore is greater than the transverse play between the said linear guide-elements. Furthermore, the axial length of the piston is less than the depth of the cylinder-bore. Whenever the cylinder-piston unit is relieved of its load, and the cylinder thus returns to its position of rest, it is centered in the cylinder-bore by means of a centering device.
Abstract: The pump comprises a plurality of cylinders (4) disposed radially in a star formation around a shaft (5) with an eccentric (6) in a body (2, 3) formed by first and second members (2, 3) joined together by bolts (13). Each cylinder (4) is clamped in position between the first and second elements (2, 3) of the body between a pair of the said bolts (13). The facing surfaces of each cylinder (4) and of at least one (3) of the members (2, 3) of the pump body are spaced in correspondence with the central portion of the cylinder (4) in which is formed the chamber (9) in which the associated piston (10) is movable, so that the contact between the cylinder (4) and the at least one member (3) of the body (2, 3) of the pump is limited to surfaces outside the central portion of the cylinder (4).
August 25, 1988
Date of Patent:
August 28, 1990
Sisto L. De Matthaeis, Mario Ricco, Alessandro Valetto
Abstract: A master cylinder assembly especially adapted for mounting in the passenger compartment of a motor vehicle in association with the clutch pedal assembly of the motor vehicle. The unit is permanently sealed and is non-serviceable so that no fluid leakage occurs in the passenger compartment as a result of attempts to service the unit. The master cylinder assembly includes a cylinder having an open rearward end and a closed forward end, an external mounting flange intermediate the ends, and an elongated reservoir mounted in piggyback fashion on the cylinder between the mounting flange and the forward end of the cylinder with the rear end of the reservoir pivotally secured to the mounting flange and with a discharge fitting on the forward end of the reservoir moving into telescopic sealing relation with a reservoir fitting on the forward end of the cylinder in response to pivotal movement of the rear end of the cylinder about the pivot axis defined between the rear end of the reservoir and the mounting flange.
February 17, 1988
Date of Patent:
May 15, 1990
Automotive Products plc
David C. Barker, Keith V. Leigh-Monstevens
Abstract: A pressure cylinder, such as a master cylinder, primarily for use in a vehicle brake or clutch hydraulic system includes a cylinder component molded from plastics material, and an initially separate flange component which is preferably but not essentially, also molded from plastics material. The two components are provided with an interconnecting arrangement capable of transmitting axial thrust between the two components, and also resisting relative rotation therebetween.
Abstract: A hydraulic cylinder comprising a hollow sleeve, having inserted in it, a hollow piston rod. The hollow sleeve further contains an opening allowing hydraulic fluid to pass therethrough and into the hollow piston rod. At the end remote to the opening, a mounting mechanism is contained. On the end proximate the mounting mechanism, a fluid outlet is contained. In use, hydraulic fluid passes through the opening of the hollow sleeve, into the piston rod, and out of the piston rod proximate the mounting mechanism.
Abstract: A housing of a reciprocating gas compressor comprises a partition member separating an upper suction chamber through which gas passes and a lower crankcase chamber in which a crankshaft rotates and which has an oil sump at the bottom. The partition member is imperforate except for sealed openings through which cylinder sleeves and hydraulic fluid lines extend between the chambers. A conduit located on the housing exterior and connected between the chambers performs three functions, namely: enables gas flow in either direction to effect pressure equalization; enables oil to flow by gravity from low points in the upper chamber into the sump; and enables oil mist in the gas flow through the conduit to coalesce on the inner walls of the conduit and flow by gravity into the sump.
Abstract: A reversible spring return cylinder actuator having a pair of piston rods extending from a common spring load piston to the exterior of the housing. In a non-pressure position of the piston, one of the piston rods extends further from the housing than the other. Either piston rod and either end of the housing can be mounted to a device to be actuated so that the same actuator can be used to define a non-pressure extend or retracted actuator without disassembly of the actuator.
Abstract: A pressure cylinder has a piston actuated by a force-input rod. An enlarged head of the rod is engaged by a washer and the assembly retained within the cylinder by a cup-shaped retainer press-fitted into the cylinder open end. An outer surface of the retainer is flush with the adjacent axially outermost surface of the cylinder and engages a support, to which the cylinder is fixed, in order to transmit to the support retraction forces sustained by the rod.
Abstract: A rotary actuator for converting a linear reciprocatory movement of a piston into a rotary reciprocatory movement of an output shaft through a connecting member. The rotary actuator includes a cylinder case formed with a pedestal in a position in which the output shaft extends vertically out of the cylinder case. The pedestal is formed with a substantially square elevated portion, and a depressed portion defined by the elevated portion. A plurality of projections spaced apart from each other by a predetermined angle are formed integrally with the pedestal in the depressed portion to constitute dividing lines of a scale for indicating the angle of rotation of the output shaft by means of a pointer.
Abstract: A replaceable cartridge assembly for master cylinder having a housing with a longitudinal bore and an oil inlet connected to the longitudinal bore. The assembly includes a cylinder removably mounted in the longitudinal bore, a pair of seal rings mounted on the cylinder and located on each side of the oil inlet, an axial bore in the cylinder having a fluid outlet at one end connected to the brake system, and a pair of ports connecting the space between the seal rings to the axial bore in the cylinder. A piston in the cylinder has a cup seal around the outside and an O-ring seal spaced from the cup seal. A collar in the end of the axial bore in the cylinder retains the piston in the bore while a spring in the axial bore in the cylinder biases the piston away from the end of the cylinder.
July 24, 1987
Date of Patent:
November 7, 1989
Hayes Industrial Brake, Inc.
Glenn S. Metzelfeld, James A. V. Buckely, Donald D. Brown
Abstract: The invention involves pressure-counterweighted oil-well pumping apparatus in which derrick structure of elemental simplicity involves components which are readily assembled and disassembled, such that a given pumping apparatus can be loaded on a single truck and transported from one to the next desired well-pumping location. For a given capacity pumping system, overall height requirements for the derrick structure are less than one half those of U.S. Pat. No. 4,631,918. And power-integrator complexity is substantially reduced by employment of a fixed-displacement variety in conjunction with a variable speed a-c motor as the prime mover, under control of solid-state devices and pressure-sensitive transducer elements which determine upper and lower limits of the reciprocating stroke.
Abstract: A fastener arrangement for securing a shell (14) of a brake booster (10) to the firewall (12) of a vehicle. An annular radial land (18) on the shell (14) is located adjacent a flange (22) on the firewall (12). A spring clip (26) acts on the land (18) to position a groove (20) between the land (18) and the end wall (16) of the shell (14) around the flange (22). The flange (22) axially retains the land (18) to connect the shell (14) to the firewall (12).
Abstract: In combination with a piston-and-cylinder arrangement, supporting and attaching apparatus for attaching the piston-and-cylinder arrangement to a supporting structure and for supporting the piston-and-cylinder arrangement includes a frame attached to the cylinder for transmitting loads acting on the piston-and-cylinder arrangement to the supporting structure, the frame having a shell-type design disposed over at least a portion of the cylinder and a mechanical joint for attaching the frame to the cylinder. The supporting and attaching apparatus include a reinforcing rib which closes an end of the frame adjacent to the closed end of the cylinder, the reinforcing rib being coupled to the closed cylinder end. The frame is clamped on the piston-and-cylinder arrangement against a sleeve-like collar that projects from the cylinder by a bolt joint which attaches the reinforcing rib to the closed end of the cylinder.
October 8, 1986
Date of Patent:
February 28, 1989
Olli Saarela, Vesa Helske, Erkki Haapanen
Abstract: The device has primary and secondary frame members interconnected by extensible and retractable positioning members connected by fluid circuits that cause extension of the member at either end of a circuit in response to retraction of the member at the other end of the circuit. Relative movements of the positioning members occur in response to the imposition of forces and moments at the projected center of compliance upon a pin or the like supported by the secondary frame member, and so adjust the position of the secondary frame member as to cause translatory and rotative movement of the supported pin.
Abstract: A booster mounted on a supporting panel by a cam and lock arrangement has an inverse arc securing tab and arm mechanism which prevents further rotation in either direction from the installed position.
Abstract: The assembly nut (5) is prescrewed onto the bolt (4) fixed to the booster (1), the nut and its bolt being introduced through a first end zone of enlarged cross-section (9) of an orifice in the wall (3), after which the booster is moved relative to the wall (3), in order to bring the body of the bolt (4) into a second end zone (10) of the orifice of a cross-section corresponding to that of the bolt, the nut (5) then being screwed home against the wall in the assembly position thus obtained. Advantageously, the wall (3) has a projecting part (11) adjacent to the orifice between the first (9) and second (10) end zones of the latter, so that, by putting itself in the path of the nut (5), it opposes a tendency for the unit to come apart.
Abstract: A pressure cylinder assembly includes a cylinder and an outwardly projecting flange. The assembly is formed by inserting into the cylinder open end a body having a groove in its outer surface, so that the groove lies in opposition to a wall of the member, and deforming said wall into the groove to lock the body axially within the member. This deformation produces corresponding depressions in the outer surface of the member. A flanged collar is then placed around the member and deformed into the depressions to lock the collar axially and rotationally relative to the body with the flange of the collar projecting outwardly for mounting the assembly on a support.
Abstract: The assembly nut (6) is prescrewed onto the bolt (5) so as to be up against a tubular spacer (15); the bolt, together with its nut and its spacer, is introduced through a first end zone of enlarged cross-section of an elongate orifice made in the fixed wall (4), after which the booster is moved relative to the wall in order to bring the spacer (15) into a second end zone of the orifice in the wall, of a cross-section corresponding to that of the spacer, and then a plate (18) likewise having an elongate orifice with two end zones of different cross-sections is interposed between the wall (4) and the nut (6), the plate being moved in order to place the spacer (15) in the end zone of corresponding cross-section (22) of the orifice in the plate, this movement producing, between the wall (8) and the nut (6), a wedge effect attributable to an edge of variable thickness (24) of the orifice in the plate (18).
Abstract: A booster is mounted on a supporting panel by a cam and lock arrangement. The mount can be accomplished from one panel side, and the booster input push rod is readily connected to a pedal arm.
Abstract: A machine component, such as a steering axle is provided as an elongate member having a hydraulic cylinder connected thereto intermediate the ends of the elongate member, said cylinder having an end plate at each end, a piston in said cylinder with piston rods extending from each end of said cylinder through said end plates and pivots supporting each of said end plates on said elongate member whereby said end plates may pivot by a small amount around said pivots.
Abstract: An actuator assembly for imparting non-proportional tangential displacement (22b) to a plurality of unison rings (16b, 16c) disposed about the exterior of a compressor case (10b) is provided. The assembly includes a linear drive component (26b) mounted on trunnions (74, 76) and supported by a frame 48. The drive component (26b) imparts a rotating motion to a crankshaft 70 which in turn drives the unison rings (16b, 16c) via the respective crank arms (42b, 42c) and pushrod (30b, 30c) linkages. Radial loading of the compressor case (10b) is avoided by aligning both the pushrod (30b) and the elongated frame first end (50) tangential to the compressor case (10b).
Abstract: The invention relates to a cylinder and piston unit with a cylinder tube closed at both its ends by cylinder end caps. An axially moving piston in the cylinder has a piston rod extending sealingly through at least one end cap. On the outer face of the tube there are four longitudinal means such as longitudinal ribs or round tie rods extending in the axial direction of the tube and equally spaced in the circumferential direction about the tube. Furthermore there is a mounting yoke for pivotally carrying the cylinder and piston unit and having at least two, and more especially four, generally diametrally opposite clamping jaws with trunnions on two of them. The mounting means furthermore constitutes an annular structure encircling the tube. At their ends the clamping jaws have gripping faces adapted to engage and grip the longitudinal ribs or rods on opposite sides thereof so that the tube is held firmly by clamping the jaws together.
Abstract: A guide housing as a component of a linear actuator is made up of a barrel and two platforms integrally formed thereon and running the length thereof. The transition or join between each platform and the barrel is formed by a constricted part or waist of the guide housing. The outer face of the guide housing is convex over the barrel and concave over the constriction. The outer face of the barrel may have flats with grooves therein. The platforms have longitudinal holes or grooves in which fittings are adjustably mounted for setting and monitoring the stroke of the actuator.
Abstract: A clamping bracket arrangement is provided which tightly grips the mounting boss of a wheel cylinder and the axle housing to which the brake assembly of which the wheel cylinder is a part is mounted, preventing movement of the wheel cylinder relative to the axle housing. The bracket arrangement may be quickly and easily installed in field service without the need for removing any parts of the brake assembly.
Abstract: Braking booster servomotor for actuating a master cylinder and comprising at least a rigid force transmitting stirrup member disposed about the two shells constituting the casing of the servomotor, the member also contributing to the closure of the casing.
Abstract: A actuating device for a vehicle, especially an automobile, in which an actuating device such as a hydraulic brake master cylinder and booster, is arranged to extend within an engine room at an angle to the longitudinal direction of the automobile body to fit in a restricted space and has its rear end portion protruding into the operator compartment. A pedal arm is supported on the rear end portion of said actuator by a hinge pin arranged in a plane substantially normal to the center line of the actuator, but is inclined with respect to a horizontal plane such that the moving locus of the foot pedal at the rear end of the pedal arm generally follows a longitudinal vertical plane to provide a normal motion for the operator's foot during movement.
Abstract: A hydraulically operated actuator for a sliding gate valve designed for use in a subsea environment. The actuator includes a manual override system that functions independently of the actuator's hydraulic piston and return spring, an externally accessible valve gate drift adjustment, an externally adjustable upstop for the actuator stem, a stem thread assembly that can be manufactured from a material different from the actuator stem to prevent or reduce the possibility of thread galling, a hydraulic control pressure porting system integral with the hydraulic cylinder to minimize space requirements, and a facility for accommodating an optional external electrical stem position indicator package.
Abstract: A motor mount having first and second mounting surfaces with at least three mounting elements fixed therebetween is used to absorb motor vibration and shock impulses which are produced primarily parallel with the plane of the mounting surfaces. Two of the three mounting elements are dampers which flexibly connect the first mounting surface in a parallel relation with the second mounting surface. The third mounting element maintains a preferred range of distance separation between the mounting surfaces to that a damping flexion potential of the dampers is maintained.
Abstract: A linear transfer stroking boom has a housing suspended from a support which may be the travel carriage of an overlying longitudinally reciprocal shuttle. A cylinder assembly is mounted within the housing and includes a reciprocal piston rod on a longitudinal axis. A plurality of parallel spaced guide rods are slidably mounted upon and extend through the ends of the housing and outwardly thereof. Boom mount plates span the ends of the guide rods with the piston rod secured to one boom mount plate. A pair of parallel spaced boom extension arms are removably mounted upon the boom mount plates and extend forwardly of the housing. A workpiece gripping assembly spans and depends from the free ends of the boom arms. Reciprocal movement of the piston rod effects corresponding longitudinal movements of the boom arms in the same direction as and simultaneous with feed corresponding movements of the travel carriage.
Abstract: A fluid-powered, rotary actuated support, including an elongated cylindrical body having ports for introducing pressurized fluid therein; a platform concentric with the cylindrical body and rotatable relative thereto; a radially extending bearing support joined to the cylindrical body and confronting the platform; bearings disposed between the bearing support and the platform for allowing relative rotational movement between the platform and the bearing support, with one of the platform or bearing support being subjected to bending loads disposed in a generally vertical plane from the weight of a crane or other device and its load; a longitudinally splined output shaft rotatably disposed within the body and having a drive end for providing rotational drive between the body and the platform, the splines being loosely fitted to the platform for substantially isolating the shaft from non-rotational movement of the platform, the shaft being bearingless and radially floating within the body for transferring rotati
Abstract: A master cylinder of resin material includes a cylinder having a receiving portion within which a piston is sealingly slidable, a cylindrical portion having a diameter which is larger than that of an outer periphery of the cylinder and coaxially rearwardly extending from the fore part of the receiving portion, and mounting flanges radially extending from a rearward end of the cylindrical portion. Each of the cylinder, the cylindrical portion and the mounting flanges are integrally formed.
Abstract: Bonnet securing and retracting apparatus for a ram blowout preventer is disclosed. The ram blowout preventer bonnet is retained by two bonnet studs and nuts and by bonnet bolts. Bearings in the bonnet are provided to slide on bonnet studs. To retract the bonnet from the ram blowout preventer housing, the bonnet nuts and bolts are removed, and the bonnet may be slid on the bonnet studs outwardly from the housing. Removable stop pins in the bonnet studs prevent the bonnet from sliding off the studs. After the pins are removed, the bonnet may be completely removed from the housing.This abstract of the disclosure is neither intended to define the scope of the invention, which is measured by the claims, nor is it intended to limit the invention in any way.
Abstract: A tandem brake master cylinder which includes a single inlet union having two inlet union portions which are connected to each other as a single, unitary body via a connecting portion, the connecting portion having at approximately a central portion thereof a mounting portion which projects toward a cylinder body and which has an insertion hole formed therein. The distance between each inlet union and a common mounting screw may be double that as compared with the distance between the inlet union and its associated mounting screw in conventional master cylinders and therefore the play of the inlet union portions may be greatly reduced.
Abstract: An oil well pumping apparatus which includes a submerged reciprocating pump mounted in a tubing arrangement communicating with the wellhead, a sucker rod string extending through the tubing arrangement and connected in driving relation with the pump, and a pumping tee and stuffing box arrangement mounted on the casing of the well at the wellhead and including a sealed drive rod arrangement in the stuffing box connected in driving relation to said sucker rod string, and a pump driving unit. The pump driving unit includes a hydraulic cylinder and support means including a gimbal arrangement for supporting the hydraulic cylinder over the stuffing box with the axis of the cylinder rod aligned with the axis of said stuffing box. A coupling means is provided for coupling the cylinder rod to the sealed drive rod arrangement. A hydraulic drive/control unit is coupled to said in/out fluid line for operating cycle consisting of a hydraulic power upstroke and a gravity power downstroke.
Abstract: A Bourdon tube apparatus is provided for monitoring the pressure of a fluid pressure source. The output of the Bourdon tube is translated into a curvilinear motion which is transmitted to a linearly movable actuator valve or indicator. To enhance the force output linear response or linear output of the Bourdon tube actuator, an abutment block is provided which contacts one or more turns of the Bourdon tube adjacent its closed end to prevent expansion movement of the Bourdon tube in a direction opposite to the desired linear output movement. The Bourdon tube is mounted for calibrational purposes by having its open end connected by a flexible pipe to a support post which is rotationally mounted for movement about its longitudinal axis and defines a fluid conduit connection between the pressure source being monitored and the open end of the Bourdon tube.
Abstract: A petroleum pumping unit which is especially suitable for use in remote oil fields and under unpredictable pumping conditions is disclosed. The petroleum pumping unit of the present invention, which is easily movable between a folded, collapsed position for storage and shipment and an erect position for pumping operations, includes a horizontal support platform on which is pivotally mounted a mast assembly including a pair of masts spaced outwardly from the centrally positioned well polish rod. The polish rod is engaged by a notch in a horizontal, vertically movable bridle and is powered by at least one pair of flexibly mounted hydraulic cylinders and associated piston rods attached to the bridle and positioned between the polish rod and the masts and parallel thereto. Vertical movement of the bridle and, therefore, the stroke of the polish rod is defined by upper and lower limit switches which are actuated by actuating means on the bridle.
Abstract: A compressed-air vibrator with a cylindrical housing confined between closure covers, within which there is arranged a piston reciprocated by the compressed air, whereby the compressed air is alternatingly introduced into the two working chambers through a central inlet groove in the cylinder bore and through axial bores which discharge through the end surfaces of the piston, and wherein the air is conveyed out of the chambers through outlets which are controlled by the piston edges.
Abstract: This invention relates to a brake booster for automotive vehicles including a housing, a brake master cylinder connected to the housing and a diaphragm power piston dividing the housing into first and second fluid chambers and having a retracted position defined by abutment with the housing and a control valve mechanism for the diaphragm power piston to control the pressure differential between the chambers in response to brake pedal movement axially relative to the power piston, wherein at least two bolts extend from the master cylinder outside of and past the housing toward a dash board of a vehicle for installation. A brake reactional force is transmitted by the bolts from the master cylinder directly to the dash board bypassing the housing, the thickness of the sheet metal forming the housing being thus calculated to be a lesser gauge for weight decreasing purposes than would otherwise be required.
Abstract: A hydraulic manifold assembly includes a body (20) having an end face (28). Bolts (26) and a flange (22) are employed to mount the body (20) within a sealed chamber (14) in nominally aligned relation with an enlarged opening (30) from the chamber (14). External threads (50) adjacent the end face (28) extend through the opening (30) and a fluid conduit (32) terminates in a port (36) in the end face (28). A nut (52) is sized to cover the opening (30) for any position of nominal alignment of the body (20) to the opening (30) and is disposed on the threads (50) such that a side (64) of the nut covers the opening. A seal (62) is carried by the nut for sealing the interface of the nut (52) and a side (10) of the chamber (14).
Abstract: A shipping assembly for a hydraulic jack in which the cylinder of the jack is shipped in sections. First and second shipping caps are fastened to predetermined ends of the cylinder sections during shipment, with the first shipping cap utilizing certain of the same cylinder joint fastening hardware which will subsequently be used to join the cylinder sections at the job site. The first and second shipping caps are cooperatively configured to enable them to be assembled into a complete, self-contained shipping package for return to the factory, using the fastening hardware used to secure the second shipping cap to a cylinder section.
Abstract: Disclosed herein is a fluid pressure operated cylinder assembly made up of an elongated barrel of a square shape in cross-section, and having a cylindrical bore extending therethrough defining longitudinally extending corners at spaced points around the bore. The elongated barrel has end faces at the opposite ends extending transversely with respect to the longitudinally extending corners and defining cylinder end planes bounding the opposite ends of the cylindrical bore. A cylinder head made of plastic and including an annular mounting ring molded therein is positioned entirely within the cylindrical bore adjacent one of the cylinder end planes. An end plate is secured in facial abutment with an end face and adjacent to the cylinder head by screws extending through the end plate and into the barrel corner.
June 9, 1978
Date of Patent:
January 26, 1982
Galland Henning Nopak Inc.
Hermann A. Nunnemacher, Peter Weil, Jr.
Abstract: A low non-skidding rack holds a breathing bag against the operating room floor in position to be conveniently squeezed rhythmically by the anesthetist using the ball of his foot, thus reinforcing or even taking over the depressed respiration of his patient, while leaving both his hands free for doing venipunctures and performing other functions. The rack includes at one end a rigid tube, removable for sterilization, which couples a breathing hose coming off the gas machine to the mouth of the gas bag, and at the other end an arm with means for gripping and holding the tail of the gas bag.
Abstract: A vacuum motor includes a cylindrical housing with a mount plate at one end and an end wall at its other end terminating in a guide tube. A stem, adapted for connection to an intermittently actuated vacuum source projects into and is secured to the mount plate and is adapted for securing to a support. A cylinder is nested within the housing open at one end and at its other end is axially recessed to define with the mount plate a first vacuum chamber communicating with the stem bore. A hollow reciprocal piston open at one end is sealed within the cylinder a and terminates in a tubular piston rod which projects outwardly of the guide tube adapted for connection to a load to be moved a predetermined distance. The interior of the piston defines with the cylinder a power air chamber communicating with the piston rod and atmosphere. The piston defines with the housing end wall a second vacuum chamber which is in communication with the first vacuum chamber.
Abstract: A brake assembly includes a backing plate, a pair of brake shoes slidably mounted on the backing plate, and a wheel cylinder supported on the backing plate between contiguous ends of the shoes. A retaining clip attaches the wheel cylinder to the backing plate. The retaining clip includes a base and a pair of opposed tabs extending from the base. One portion of each tab resiliently and releasably attaches the clip to the backing plate. Another portion of each tab projects into a recess in the wheel cylinder to resiliently and releasably retain the wheel cylinder in a mounted position on the backing plate. The clip and the wheel cylinder are capable of being attached to the backing plate from the same side of the backing plate.
Abstract: A drum brake includes a wheel cylinder which cooperates with a pair of brake shoes to urge the latter to a braking position. In order to attach the wheel cylinder to a backing plate, a flange is disposed in abutment with the backplate and the wheel cylinder and a nut cooperates with the flange and the wheel cylinder to prevent separation between the wheel cylinder and the backing plate. Moreover, the nut and flange include openings for receiving a fitting communicating with the wheel cylinder. The nut extends through the flange opening to engage the wheel cylinder and the nut opening is dimensioned to receive the fitting in spaced relation thereto.
Abstract: A piston cylinder assembly includes a piston rod reciprocatively mounted within a piston chamber, and a piston fixed to the rod within the chamber. A pair of ports are mounted on opposite ends of the cylinder chamber in fluid communication therewith, each one of the ports having a laterally extending portion adapted to be connected in fluid communication with a source of fluid under pressure and having an axially extending portion opening into the interior of the chamber. A tapered seal is mounted on one of the end portions of the piston for sealing the axial portion of one of the ports to provide a cushioned movement of the piston at the terminal end of its stroke. A sleeve member extends axially within the last-mentioned axial portion of the port and terminates at one of its ends at a position disposed opposite the lateral portion of the port. A bleeding device permits fluid to leave the chamber as the seal engages sealingly the sleeve member so that the terminal portion of the piston stroke is cushioned.