Abstract: A pneumatic brake booster comprising two working chambers, with each working chamber communicating a respective one of two reaction chambers. A divider dividing the reaction chambers provides a pressure feedback force to an input shaft. A selective valve (13) allows communication (C2) provided between the rear working chamber and the front reaction chamber to be closed, at least partially, when an airflow from the rear working chamber towards the front reaction chamber is higher than a predetermined amount. This allows the response time of the booster is adjusted.

Abstract: A pneumatic booster utilizing first and second sources of air pressure and having a rigid casing (1) divided by a leaktight moving partition (2) into at least first and second working chambers (T1,T2). The moving partition (2) being urged by a pressure difference between the pressures supplied to the first and second working chambers (T1,T2) brought about by actuation of a three-way valve (5). The three-way valve (5) being retained in a pneumatic piston (4) carried by the moving partition (2). The moving partition (2) having a rigid skirt (3) including first and second walls (31,32) to define a fixed volume (V). The fixed volume being split into first and second reaction chambers (R1,R2) by a divider (11). The divider (11) constituting, within the booster, a reaction member intended to oppose an input force for actuating the three-way (5) to actuate the booster and develop an output force for the booster.

Abstract: A hydraulic pressure generator having a body (1) with a first bore (11) therein for receiving a cylinder (21) of a piston assembly (2) to define a pressure chamber (12). The cylinder (21) has a second bore (211) for receiving an auxiliary piston (22) which defines a variable volume compensation chamber (23). The compensation chamber encloses a deformable member (5) which is adapted to exert an elastic force between the auxiliary piston (22) and a closed end (210) of cylinder (21). The compensation chamber (23) communicates with the pressure chamber (12) through a restriction (221) formed in a longitudinal duct (222) of the auxiliary piston (22). A sealing member (4) borne by a portion (222) of the auxiliary piston (22) closes the pressure chamber (12) such that the elastomeric member (5) dampens pressure differences between the pressure chamber (12) and compensation chamber (23).

Abstract: A tandem brake booster having a housing with a first front chamber separated from a first rear chambers by a first wall and a second front chamber separated from a second rear chamber by a second wall. The first and second front chambers are connected to the first and second rear chambers through passages in a hub which retains a control valve. In a first or ready mode of operation, the first and second front and rear chambers have a substantially identical first fluid pressure while in a second or actuation mode of operation, the control valve responds to an input force to allow a second fluid pressure to be communicated to the first and second rear chambers and create a pressure differential with the first fluid in the first and second front chambers. The pressure differential develops an output force which moves the first and second walls as a function of the input force applied to the control valve.

Abstract: A pneumatic brake booster having a casing (10) with an axis of symmetry (X-X') and divided in leaktight fashion by a movable wall structure (12,20) into a front chamber (14) and a rear chamber (16). The front chamber (12,20) is permanently connected to a source of partial vacuum while the rear chamber (16) is connected selectively to the front chamber (14) or to the outside atmosphere by a three-way valve (36). The three-way valve is actuated by a plunger (28) which slides in a bore (26) of the movable wall (12, 20) in response ton an input applied to an axial control rod (30). The three-way valve (36) is located in a rear tubular part (22) of the movable wall structure (12, 20) which projects outside of the casing (10) and including a valve element (36). Valve element (36) interacts via a first annular surface (A) with a first valve seat (28a) formed on the plunger (28) and via a second annular surface (B) with a second valve seat (20a) formed on the movable wall (20).

Abstract: A brake system (10) having a proportioning device (18) through which a first fluid pressure is communicated to a first brake circuit and a second fluid pressure is communicated to a second brake circuit. The proportioning device (18) has a housing (90) with a first bore (204) connected with a first passage (98) for receiving the first fluid pressure and with a second passage (100) for receiving the second fluid pressure. A first piston (210) located in the first bore (204) of the housing (90) separates the first passage (98) from the second passage (100). The first piston (210) responds to a higher fluid pressure of the first and second fluid pressures by moving in the first bore (204) to providing additional fluid pressure to a lower fluid pressure of the first and second fluid pressures to substantially equalize the first and second fluid pressures supplied to the first and second brakes circuits for effecting said brake application.

Abstract: The brake booster has an envelope (10) with an axis of symmetry (X-X') separated sealingly by at least one movable partition (12) to define at least a first chamber (14) connected permanently to a source of low pressure and at least a second chamber (16). The second chamber (16) being selectively connected to the first chamber (14) or a source of high pressure through a three way valve structure actuated by a control rod (30,130). The three way valve structure has a plunger (28,128) which slides in a bore (26,126) of a piston (20,90) is connected to a control rod (30,130). The position of the plunger (28,128) in bore (26,126) selectively controls the communication between the first chamber (14) and the second chamber (16) or communication between the second chamber (16) and the source of high pressure.

Abstract: A brake actuator having a mechanical actuating member (3) with an automatic adjusting device (5) to compensate for wear associated with friction members (6a,6b). The adjusting device (5) has a variable length created by an elongated nut (7) and a screw (9) which are urged in an unscrewing direction by a force from a spring (16) which is prestressed within a retention member (17). The retention member (17) has a first end which engages a second plate (14) and a second end which engages spring (16) to define a caged structure, The spring urging the elongated nut (7) into engagement with a first plate (12) and the first plate (12) into engagement with the second plate (14). A cylindrical sleeve (18) has a radial collar (18a) which is trapped between the spring (16) and second end of the retention member (17) to slidably engage the second end (7b) of the elongated nut (7) for guiding the second end (7b) into alignment with screw (9).

Abstract: A swivel apparatus (16) on which a seat (10) is mounted in a vehicle to provide for rotation from a first position to a second position. The swivel apparatus (16) includes a support assembly (20) having a base member (22) with a plurality of legs (24, 24'. . . 24.sup.n) fixed to the vehicle. The base member (22) has a horizontal lower side (26) and a parallel horizontally upper side (28) with a central opening (30) that extends from the lower side (26) to the upper side (28). A collar (34) has a flange (36) which extends through the central opening (30) of the base member (22) to position a first bearing (37) between the collar (34) and the lower side (26) of the base member (22) while the flange (36) aligns a second bearing (38) on the upper side (28) of the base member (22). A mounting member (40) to which the seat (10) is connected is located a top of the second bearing (38) and attached to the flange (36) by a plurality of fastener (46, 46'. . . 46.sup.n) to define a unitary structure.

Abstract: A pneumatic brake booster for providing braking assistance. The brake booster has a housing (10) with an axis of symmetry (X--X') separated sealingly by at least one movable partition (12) to define at least a first chamber (14) connected permanently to a source of low pressure and at least a second chamber (16). The second chamber (16) being selectively connected to the first chamber (14) or a source of high pressure through a three way valve structure actuated by a control rod (30,130). The three way valve structure have a valve member (36,136) which cooperates through an a first annular face (40,140) with a first annular valve seat (34,134) formed on a plunger (28,128) which slides in a bore (26,126) of a piston (20,90). The annular face (40,140) of the valve member (36,136) being urged forward in the direction of the annular valve seat (34,134) by a valve spring (42,142).

Abstract: A pneumatic brake booster having first and second sources of air pressure for developing an output force. The booster has a rigid casing (3) divided by a leaktight moving partition (4) into a first chamber 3(a) and a second chamber 3(b). The moving partition being moved by a difference in the fluid pressures prevailing between the first chamber 3(a) and the second chamber 3(b) to drive a pneumatic piston (5) which carries a valve (7). The valve (7) being actuated by an operating rod (10). The inside (50) of the piston (5) is separated from the second source of air pressure by a purification filter (14). The operating rod (10) slides in a sleeve (16) and which passes through the purification filter (14) has a widened part (100). The widened part (100) together with one end (162) of the sleeve (16) forms an additional valve allowing an additional and direct air intake into the piston (5) in the event of an abrupt application designed to effect a substantial braking force.

Abstract: The invention relates to a pneumatic brake booster using two sources of air pressure and comprising a rigid casing (3) divided by a leaktight moving partition (4) into at least two chambers (3a, 3b), it being possible for the moving partition to be urged by a difference, brought about by an actuation of the valve, between the pressures supplied to the chambers in order to drive along a pneumatic piston (5) bearing an operating valve (7), the inside (50) of this piston being separated from the second source by a purification filter (14).

Abstract: A disk brake having a caliper (1) which straddles a disk (2), a carrier (3) fixed to the vehicle, a cylinder (4) secured to the caliper and closed by a piston (5) and two friction pads (10,11). Two cylindrical and mutually parallel guide pins which slide in corresponding housings. These housings being partially formed by bores (8, 9) made in the carrier (3) for maintaining the caliper (1) with the cylinder (4). The first bore (8), over first and second contiguous sections (s1, S2) of its length, has first and second respective inside diameters (D1, D2), the second diameter (D2) of which is greater than the first diameter (D1). The smaller diameter (D1) being formed on the same side of the first housing as the opening of the bore (8) and the first housing is formed, in addition to the first bore (8), from inside (130) a ring (13) made of elastomeric material.

Abstract: A brake assembly (10,210,310,410) with a master cylinder totally integrated into a brake assembly. A housing for the brake assembly has an interior separated by a movable wall (30,30') to define first (32,32') and second (34,34') chambers. End element (18) secured to the housing has projection (17) located in the first chamber (32,32') with a plurality of passages (98,100) for communicating fluid to a brake system. A cylindrical member (60, 260,360,460) has a blind bore (74) that extends from a first end (70,264,364) toward a second end (72,266,366). The cylindrical member (60,260,360,460) slidably and sealingly engages the end element (18) to connect the blind bore (74) with the plurality of passages (98,100). A reaction member (120) is located between the hub member (46) and the cylindrical member (60, 260,360,460).

Abstract: A frame for a bimini cover for a deck of a water craft. The support structure has a first end frame retained in a fixed position with respect to the deck and a second end frame pivotally connected to the first end frame. The frame has first and second support members each of which have a first end fixed to the deck and a second end fixed to the first end frame to define first triangular members to hold the first end frame in a fixed position with respect to the deck. The second end frame is moved from a closed position to an opened position to selectively extend a canopy over the deck. First and second strut members are secured to the first end frame and joined to the second end frame to define second triangular members. The strut members are adjustable after being joined to the second end frame to hold the second end frame at a fixed arcuate distance from the first end frame while maintaining a predetermined tension on the canopy.

Abstract: A pneumatic brake booster using first and second sources of air pressure and having a rigid casing (3) divided into at least first (3a) and second (3b) chambers by a leaktight moving partition (4). The moving partition (4) being capable of being urged by a pressure difference brought about by the actuation of a valve (7). Valve (7) having a tubular shut-off member (70) which together with an internal face (510) of a piston (5) delimits a compensation volume (74) that is permanently connected to the second chamber (3b). The shut-off member (70) of valve (7) facing first (71) and second (72) seats. The shut-off member (70) having a continuous and leaktight surface while the compensation volume (74) is connected to the second chamber (3b) by an axial piercing of a portion (8) of a greater thickness of a cylindrical wall (51) on the pneumatic piston (5).

Abstract: A hydraulic valve having a housing with a piston located in a bore. The piston has a passage which connects an inlet chamber with an outlet chamber. A piston responds to a pressure differential between the inlet chamber and outlet chamber pressure and an outlet pressure by moving in the bore. A valve carried by the piston engages a needle to open communication through the passage and communicate fluid from the inlet chamber toward the outlet chamber. The needle extends from a core of an electromagnet, which responds to move the valve off a seat and open communication through the passage in opposition to a spring which urges the valve toward the seat and correspondingly control communication through the passage.

Abstract: A master cylinder (12) and pneumatic brake booster (10) assembly for use in a motor vehicle. The pneumatic brake booster (10) has a casing (15) fastened to a wall (16) which separates a cabin (H) from a front compartment (C) of the motor vehicle. The pneumatic brake booster (10) is actuated by control rod (18) having a rear end which is connected to a brake pedal located in the cabin (H). The master cylinder (12) has a body (20) formed with at least one flange (22) for fastening the master cylinder (12) onto the front wall of the casing (15). An aggressive element (26) extends from the body (20) and engages the casing (15) on rotation of the master cylinder (12) in response to a torque being applied to the master cylinder (12). Engagement of the aggressive element (26) with the casing (15) will attenuate the communication of the torque into the control (18).

Abstract: A pneumatic brake booster (1) having a piston (5) which is responsive to first and second sources of air pressure. The booster (1) has a rigid casing (3) which is divided by a leaktight movable partition (4) into first (3a) and second (3b) chambers. The partition (4) including a pneumatic piston (5) which carries a control valve (7). A difference in pressure established between the first (3a) and second (3b) chambers causes the piston (5) to move within the casing (3). The inside (50) of the piston (5) is separated from the second source of air pressure by an impurities filter (14). A closing-off means (15,17) is located between an opening to the inside (50) of the piston (5) and the second source of air pressure to control an air inlet path which bypasses the impurities filter (14).