Patents Assigned to D.B.A.
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Patent number: 4553646Abstract: Brake motor with automatic adjustment, comprising a body (20) which incorporates a groove (62). A piston is mounted in this body and has a pivot (48) which guides the piston in the groove. A pawl (46) mounted at one end on the pivot (48) and applied elastically via a slope (64) against a portion (66) fixed relative to the body (20) stresses a toothed wheel (44) in terms of rotation when the relative axial movement between the body (20) and piston exceeds a predetermined value. The toothed wheel (44) integral with a nut causes the lengthening of a screw/nut system, thus ensuring automatic adjustment. The invention is used for braking motor vehicles.Type: GrantFiled: May 21, 1984Date of Patent: November 19, 1985Assignee: Societe Anonyme D.B.A.Inventors: Jean-Jacques Carre, Pierre Pressaco
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Patent number: 4553649Abstract: A drum brake assembly includes a pair of brake shoes which are slidably mounted on a fixed support. An elastic retention member is mounted on each of the shoes before they are assembled onto the fixed support. Each of the retention members includes a locking portion which engages the web of the brake shoes, and a pair of arm portions which extend from the locking portions and which engage the web of the brake shoe in such a way as to releasably maintain the locking portion engaged with the web of the brake shoe. When the brake shoes are assembled on the torque member, a portion of the torque member is provided with a sloped edge that engages the locking portion to release the latter as the brake shoes are assembled onto the fixed support, so that the retaining member then exerts a biasing force between the torque member and the brake shoes.Type: GrantFiled: December 2, 1983Date of Patent: November 19, 1985Assignees: Allied Corporation, Societe Anonyme D.B.A.Inventors: Ronald D. Bailey, Jacques Charbonnier, Michel Chotard
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Patent number: 4540067Abstract: The braking system incorporates at least one brake disc (36) sliding on a rotating driving component (22) capable of being braked by way of friction components (44, 50). The sliding disc (36) is provided with a device for returning and memorizing a position (60) enabling the disc to be always at the same predetermined distance relative to one of the friction components (44) when the brake is not applied, irrespective of the state of wear of the friction component (44). Applicable to motor vehicle braking systems.Type: GrantFiled: February 15, 1984Date of Patent: September 10, 1985Assignee: Societe Anonyme D.B.A.Inventor: Guy Meynier
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Patent number: 4534382Abstract: The invention concerns a solenoid valve with three ways and three positions, having a general construction with symmetry of revolution about an axis (1) and incorporating a magnetic armature (4) which is movable in translation along this axis under the action of an electromagnetic coil (3) and of a return spring (10). This armature is hollow and incorporates internally two valves (56a, 56b), movable relative to one another and relative to the armature (4), separated from one another by a spring (12) and provided with flanges (11a, 11b) by the intermediary of which they can be displaced by the movable armature (4), facing respective fixed seats (7a, 7b) which they are capable of closing. Each valve is pushed to the closed position by the intermediary of a spacer block (13) in point contact at the point (C) with the valve (56b).Type: GrantFiled: March 12, 1984Date of Patent: August 13, 1985Assignee: Societe Anonyme D.B.A.Inventor: Christian Tanguy
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Patent number: 4533025Abstract: A disc brake of the type comprising a caliper (10) mounted to slide on a fixed support (12) by way of a pin (14) extending parallel to the axis (0) of the disc (16), the fixed support (12) comprising two arms (28, 30) extending radially towards the periphery of the disc (16), the latter defining when it rotates in the forward direction of rotation (AV), a front arm (28) and a rear arm (30) of the fixed support (12), a brake motor (32) acting directly on an inner friction element (40) and, as a result of reaction via the caliper (10), on an outer friction (42).Type: GrantFiled: January 17, 1985Date of Patent: August 6, 1985Assignee: Societe Anonyme D.B.A.Inventor: Jean-Jacques Carre
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Patent number: 4533023Abstract: The device (10), mounted elastically for example on a projecting part (30) of the caliper adjacent a projecting part (8) of the fixed support (5), incorporates a flat leaf surface (15) intended to be interposed between the cooperating slide surfaces of the caliper (31) and the support (82) and formed at the end of an intermediate leaf zone forming a flexible ramp surface (14) which cooperates, when fitting the caliper into position, with the adjacent part (8) of the fixed support (5) so as to cause the flat surface (15) to deflect and thus ensure automatic locking of the caliper, the unlocking being easily achieved manually by a similar retraction of the flat slide surface (15). The device (10) is made in a single piece from a sheet of stainless spring steel.Type: GrantFiled: June 13, 1983Date of Patent: August 6, 1985Assignee: Societe Anonyme D.B.A.Inventors: Jean-Jacques Carre, Pierre Courbot, Jean-Claude Mery
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Patent number: 4527664Abstract: A sliding key (10), interposed between the end (5) of an arm (4) of the fixed support (1) and the adjacent profiled end (60, 70) of the sliding caliper (8), is immobilized axially by a component (15), advantageously elastic, having end portions (16) cooperating in engagement with the axially opposed ends of the key (10) and joined by an intermediate portion (20) of undulating profile defining with the adjacent outside zone of the end (5) of the arm (4) a channel (24) for a wire conductor (25) to pass through, for connection to a pad wear detector, brought to the side of the brake opposite this pad.Type: GrantFiled: January 31, 1984Date of Patent: July 9, 1985Assignee: Societe Anonyme D.B.A.Inventor: Claude Le Marchand
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Patent number: 4527670Abstract: A disc brake comprises a stirrup (10) mounted to slide on a fixed support (12) by way of a column (14) extending parallel to the axis (0) of the disc, the column (14) fixed to the fixed support (12) and received so as to slide in a corresponding bore (20) of the stirrup (10), and a locking element (50) associated with the stirrup (10) and with the fixed support (12) to cooperate in guiding the axial movements of the stirrup (10) relative to the fixed support and to oppose rotation of the stirrup (10) about the column (14) when the stirrup is in normal operating position. The locking element (50) is a rod having a first end (52) articulated to the stirrup (10) and a second end (54) articulated to the fixed support (12). The two ends (52, 54) of the rod have joints (56, 64) which provide the articulated connections and which allow the rod to move in a plane (Pb) perpendicular to the plane of the rotating disc.Type: GrantFiled: December 7, 1984Date of Patent: July 9, 1985Assignee: Societe Anonyme D.B.A.Inventor: Pierre Courbot
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Patent number: 4527667Abstract: A disc brake includes a caliper (10) slidably mounted on a fixed carrier (12) by an axial pin (38). A locking element (46) extends axially between the caliper (10) and fixed carrier (12) to maintain the caliper in circumferential alignment with the fixed carrier. The locking element (46) is fixed to either the caliper or the fixed carrier so that it will not become separated therefrom when the caliper (10) is pivoted about the pin (38) connection and rotated away from the fixed carrier (12) for servicing of the parts, and provides a snap-- together engagement of the caliper and carrier. A ramp (90) provides an interference engagement with the locking element (46) when the caliper (10) is pivoted downwardly into operational position relative to the fixed carrier (12).Type: GrantFiled: April 5, 1984Date of Patent: July 9, 1985Assignee: Societe Anonyme D.B.A.Inventor: Pierre Courbot
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Patent number: 4522576Abstract: The rotors (M, F) each have a conical outer profile and a constant pitch diameter, the rotors being mounted in opposition in the housing (1) with their axes (2, 3) parallel and their pitch diameters tangent (4). The grooves (5) of the female rotor (F) have a radial depth, in relation to the pitch diameter, which varies in inverse proportion to the outside diameter of the female rotor (F), and which, more specifically, have a circular cross-section the radius of which increases progressively in the direction of reduction of the outside diameter of the female rotor, the center of these radii remaining on the pitch diameter. The rotors are produced advantageously by molding a plastic or by casting a light alloy.Type: GrantFiled: December 19, 1983Date of Patent: June 11, 1985Assignee: Societe Anonyme D.B.A.Inventors: Jean-Jacques Carre, Pierre Courbot
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Patent number: 4516810Abstract: A brake corrector (20a) comprising a housing (26) having a bore (28) therein in which a stepped corrector piston (32) and a control piston (38) slide. A first corrector valve (66), controlled both by the corrector piston and by the control piston, and a second corrector valve (70), mounted fixed in the housing and controlled by the control piston, regulate the flow of fluid between a pressure generator of the tandem type (10) and two rear-brake motors of a vehicle (18, 24). The control piston (38) comprises two adjacent parts (38a, 38b) which define a control chamber (50) between them, the latter being connected to the pressure generator (10) via an isolating valve (20b) controlled as a function of the deceleration of the vehicle.Type: GrantFiled: November 10, 1983Date of Patent: May 14, 1985Assignee: Societe Anonyme D.B.A.Inventor: Jean-Jacques Carre
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Patent number: 4515249Abstract: The spring (1), for a disc brake of the type incorporating a calliper (10) sliding on a fixed support (12) and two friction pads (18) anchored and able to slide axially in an opening of the fixed support and the calliper incorporating an arched portion (25) having an opening (26) passing through, incorporates two hoops (2) each extended by first (3) and second (4) feet cooperating with seats formed on the inner face of the arch (25) of the calliper, the first feet (3) being joined to one another by a tiebar (6) connected to the first feet by loops (7) and bearing against an angled seat defined on the upper edge of the pads (18) by a central projection (30) on the latter. The spring (1), made advantageously of stainless steel wire, pushes elastically the friction pads tangentially and radially towards the axis of the disc.Type: GrantFiled: July 11, 1983Date of Patent: May 7, 1985Assignee: Societe Anonyme D.B.A.Inventors: Gislain Escarabajal, Jean-Charles Maligne
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Patent number: 4505519Abstract: According to the invention, the braking system includes two tandem master cylinders (100, 200), the first (100) having a first pressure chamber (110) connected to the left brake (132) of the tractor and a second pressure chamber (112) connected to the trailer brakes (300), and the second having a first pressure chamber (210) connected to the right brake (232) of the tractor and a second pressure chamber (212) likewise connected to the trailer brakes (300). The invention may be utilized with certain vehicles, in particular agriculture tractors.Type: GrantFiled: June 28, 1984Date of Patent: March 19, 1985Assignee: Societe Anonyme D.B.A.Inventor: Roland Muterel
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Patent number: 4503954Abstract: The brake comprises a torque control valve comprising a main piston which cooperates via a bearing piece with a shoe of which the bearing force is representative of the torque supplied by the brake during operation of the brake motor. The main piston controls the pressure admitted to the brake motor by a cut-off valve responsive to displacement of the main piston and by a variable volume decompression chamber of which a movable wall decompresses the fluid contained in the brake motor when the torque generated by the brake exceeds the limit of a predetermined torque-pressure law.Type: GrantFiled: December 3, 1981Date of Patent: March 12, 1985Assignee: Societe Anonyme D.B.A.Inventors: Christian Riquart, Gerard Volan, Pierre Pressaco
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Patent number: 4503949Abstract: The brake comprises two shoes lined with friction elements stressed by a clamping mechanism located between two first ends of the shoes, a fixed anchoring block located between the other two ends of the shoes, and a spacer (44) mounted in the vicinity of the clamping mechanism and bearing by each of its ends on each of the shoes.Type: GrantFiled: November 1, 1982Date of Patent: March 12, 1985Assignee: Societe Anonyme D.B.A.Inventors: Jean-Jacques Carre, Pierre Pressaco, Jean-Claude Mery
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Patent number: 4504166Abstract: According to the invention, a prestress is applied to the bearing bush (17) to obtain a certain frictional torque between the latter and the spherical pivot while the locking ring (18) is placed on the bush (17); the punching tools (28) comprising a double die (30) are then actuated simultaneously in the direction of the socket (15) so as to deform the latter along two approximately circumferential and parallel zones located on both sides of the ring (18) to surround it without displacing it.Type: GrantFiled: January 25, 1982Date of Patent: March 12, 1985Assignee: Societe Anonyme D.B.A.Inventor: Gerard Morin
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Patent number: 4502573Abstract: The invention concerns an automatic-adjustment drum brake. The brake comprises a support plate (10) which slidably carries two brake shoes (12, 14). An anchoring block (24) is disposed between first ends (20, 22) of the brake shoes (12, 14). A brake actuator (28) is disposed between the other ends (30, 32) of the brake shoe (12, 14). The brake actuator (28) cooperates with one of the brake shoes by way of an adjusting lever (44), the free end of which engages a unidirectional coupling (55) having a locking direction (A) and an adjustment direction. A strut member (34) and a spring (40) also engage the adjusting lever. The force of the spring (40) is such that as long as the brake shoes (12, 14) do not bear against the drum, the lever (44) is urged in the adjustment direction and the lever (44) is urged by the brake actuator (28) in the locking direction (A) when the brake shoes (12, 14) bear against the drum. The invention may be utilized for braking motor vehicles.Type: GrantFiled: March 8, 1982Date of Patent: March 5, 1985Assignee: Societe Anonyme D.B.A.Inventor: Jean-Jacques Carr/e/
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Patent number: 4499812Abstract: The two chambers (8, 9) on either side of the movable wall structure forming a piston (7) are each sealingly delimited internally by a first and a second flexible impervious walls (23) which connect the central hub part (11) incorporating the control valve (12) to the central annular end zones (22 ; 24) of the corresponding end walls (2 ; 3) of the housing, the central zones delimited peripherally by said flexible walls being interconnected by at least a passage (39) traversing the central hub part, thus providing in the center of the housing a neutral cylindrical zone (32). In this neutral zone (32) there extend force-transmitting elements (38) which have at their ends fastening means (40), for example with assembly flanges (41, 42), and which slidingly pass through said passages (39) formed in the body of the central hub part (11), thus in no way interfering with the control and fluid actuation system of the servo-motor.Type: GrantFiled: October 7, 1983Date of Patent: February 19, 1985Assignee: Societe Anonyme D.B.A.Inventors: Pierre Pressaco, Jean-Jacques Carre
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Patent number: 4499922Abstract: A distributor of a hydraulic servo-mechanism is provided for power-assisted steering. According to the invention, the fluid circulation circuit defined by the interaction of two distributor elements (11, 13) consists of longitudinal grooves (40a, 40b) in the outer distributor element (11) and of holes (44, 45), some of which are blind, arranged radially in the inner distributor element (13). The holes have different diameters.Type: GrantFiled: December 27, 1982Date of Patent: February 19, 1985Assignee: Societe Anonyme D.B.A.Inventor: Christian Tanguy
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Patent number: 4494719Abstract: The device (20) for fixing to a panel (14) a flexible conduit (12) in which a control cable (10) is housed and able to slide, comprises a cable fitting (22) joined to the conduit (12) and intended to be received in an opening (15) of the panel (14), the fitting (22) having an abutment surface (30) intended to bear against one face (15) of the panel (14), the end (24) of the conduit (12) extending beyond the free end (28) of the fitting (22) which extends on the other face (17) of the panel (14).The fitting (22) is provided with gripping means (40) whose jaws (42, 44), when tightened, are capable of pressingly engaging frictionally the outer surface (25) of the conduit (12) to immobilize the latter axially relative to the fitting (22), the latter (22) also being provided with clamping means (50) able to cause the tightening of the jaws (42, 44).Type: GrantFiled: January 28, 1983Date of Patent: January 22, 1985Assignee: Societe Anonyme D.B.A.Inventor: Charles Guidicelli