Patents Assigned to D.B.A.
  • Patent number: 4605103
    Abstract: The invention relates to a multi-disc brake comprising a stationary rotary disc (1) and a movable rotary disc (2) which is mounted on a splined sleeve (5) sliding on a splined part (3a) of a hub (3) which has an axis (4) and with which the disc (1) is solid. An assembly of friction blocks (6 to 9) can interact with the discs (1, 2) under the action of a hydraulic jack (13). These blocks occupy a limited angular sector over the periphery of the discs. The splines (23, 25) of the hub and of the sleeve have shaped flanks. A ring (30) for guiding the sleeve (5) radially relative to the hub (3) is provided at each of its ends, so as to prevent any jamming of the sleeve (5) because of the tendency of the disc (2) to rock under the action of the jack (13).
    Type: Grant
    Filed: June 21, 1984
    Date of Patent: August 12, 1986
    Assignee: Societe Anonyme D.B.A.
    Inventors: Jean-Jacques Carre, Ghislain Escarabajal
  • Patent number: 4598799
    Abstract: Multi-disc brake, of the type incorporating at least one first rotary disc firmly fixed to the wheel of the vehicle and a second rotary disc mounted so as to slide on a support component itself firmly fixed to the wheel, the driving in rotation of the second disc by the said support component being effected by the intermediary of complementary splines having a gear tooth profile. To overcome the undersirable effects of the tilting moment exerted on the sliding disc (2) by the thrust of the actuating cylinder (12), the invention is arranged to provide this disc with axial guiding projections (14) engaging in openings of corresponding shape (15) arranged in the other disc (1).
    Type: Grant
    Filed: November 27, 1984
    Date of Patent: July 8, 1986
    Assignee: Societe Anonyme D.B.A.
    Inventor: Alain Thioux
  • Patent number: 4594937
    Abstract: The servomotor incorporates a component (30) for retaining and for positioning the plunger (12) forming the moveable seat (11) for the valve means (9), the component (30) consisting of a plate incorporating a U-shaped central portion lying in a radial cavity (18) of the valve body (8) and cooperating with a shoulder (47) of the plunger (12), and a portion outside the valve body (8) pivoting about an axis Z carried by the valve body and having an end (42) coming into abutment, in the rest position, against a ring (43) mounted in the neck (21) of the casing (1).
    Type: Grant
    Filed: February 15, 1985
    Date of Patent: June 17, 1986
    Assignee: Societe Anonyme D.B.A.
    Inventors: Guy Meynier, Alain Thioux
  • Patent number: 4595084
    Abstract: The invention concerns the construction of a blank with a view to manufacturing a handbrake control lever (34) for a drum brake. The blank defines two fingers situated essentially at the extension of the body of the blank, one of the fingers is to be folded back to form a trough (62) to accept a cable, the other finger is to be positioned relative to the trough (62) so as to prevent the cable from escaping from the latter.
    Type: Grant
    Filed: October 15, 1984
    Date of Patent: June 17, 1986
    Assignee: Societe Anonyme D.B.A.
    Inventor: Gerard Le Deit
  • Patent number: 4595082
    Abstract: The invention relates to a drum brake for an automotive vehicle, comprising two brake shoes (18, 20) adapted to be moved apart by a wheel cylinder (14), one (18) of said shoes carrying an adjuster including a lever (40) having a free end (48) defining a toothed sector (52) cooperating with a pawl (44) also carried by said one shoe (18), a strut (50) being provided between the other shoe (20) and the lever (40) to automatically control pivoting of the latter.A link (74) disposed between the pawl (44) and the lever (40) to prevent pivoting of the latter through more than a predetermined angle relative to the position occupied by the lever (40) when the lining carried by the shoes (18, 20) are new.
    Type: Grant
    Filed: March 23, 1979
    Date of Patent: June 17, 1986
    Assignee: Societe Anonyme D.B.A.
    Inventor: Gerard Le Deit
  • Patent number: 4595085
    Abstract: The device incorporates a tubular bearing component (20) having an end portion inserted into the bottom (11) of the piston (1) and a portion projecting into the cavity (9) of the piston, the uni-directional clutch-spring (14) for the tapped sleeve (12) engaged on the threaded rod (8) for the handbrake being mounted on this projecting portion of the bearing component and incorporating an end arm (15) joined to the sleeve (12).
    Type: Grant
    Filed: August 23, 1984
    Date of Patent: June 17, 1986
    Assignee: Societe Anonyme D.B.A.
    Inventors: Claude Le Marchand, Jean-Pierre Gautier
  • Patent number: 4588052
    Abstract: The drum brake comprise two shoes (12, 14) equipped with friction elements (24, 26) capable of being urged into frictional engagement by an applying mechanism (28) arranged between two first ends (30, 32) of the shoes (12, 14), a fixed anchor block (34) disposed between the other two ends (36, 38) of the shoes, a spacer (44) mounted near the applying mechanism (28) and bearing at each end on one of said shoes, the spacer (44) including a device which lengthens automatically as a function of wear of the friction elements and constituted by a screw-nut system (58, 60) controlled by a pawl (76) mounted on an articulated arm (62) acting on a ratchet wheel (58).
    Type: Grant
    Filed: October 23, 1984
    Date of Patent: May 13, 1986
    Assignee: Societe Anonyme D.B.A.
    Inventor: Pierre Courbot
  • Patent number: 4588051
    Abstract: The subject of the invention is a disc brake of the type with a caliper (1) mounted to slide on a fixed support (4) by a column (3). The caliper (1) incorporates a brake motor (9) acting directly on an inner pad and via the caliper (1) on an outer pad. The two pads are received so as to slide in an orifice (5) formed in the caliper (1). The pads are locked in the orifice by a key (20). According to the invention, the inner pad incorporates a semi-circular lug (25) mounted in a semi-circular receptacle (24) formed in the fixed support (4) so as to prevent the caliper (1) from tilting about the column (3) when the pads are in place and are locked by the key (20). The invention may be utilized with the brakes of motor vehicles.
    Type: Grant
    Filed: December 12, 1983
    Date of Patent: May 13, 1986
    Assignee: Societe Anonyme D.B.A.
    Inventor: Jean-Claude Mery
  • Patent number: 4588363
    Abstract: The compressor incorporates a front inlet aperture consisting of two annular sectors (11, 12) each having an opening angle of less than 200 degrees, the two annular sectors being essentially symmetrical relative to the plane of intersection of the rotor chambers and seperated from one another by a central portion of an end wall of the casing defining the said annular sectors. The outlet opening (16) is formed in a peripheral wall of the casing and has a general V-shape whose convergent edges are parallel, in projection, to the threads of the respective rotors and whose axial height is less than twice the axial distance between two adjacent rotor threads.
    Type: Grant
    Filed: March 18, 1985
    Date of Patent: May 13, 1986
    Assignee: Societe Anonyme D.B.A.
    Inventors: Jean-Jacques Carre, Roland Levrai
  • Patent number: 4582177
    Abstract: Braking device comprising a brake motor provided with a mechanically actuated device of the rotary type (a mechanism of the screw-and-nut type with reversible pitch) and a control jack of the "spring cylinder" type connected by a power transmission mechanism to this actuation device. According to the invention, the power transmission mechanism comprises a cam (50) keyed on the spindle of the actuation mechanism of the brake motor (10), and a cable (52) attached at one of its ends to the rod (38) of the control jack (30) and at its other end held wound round the cam, the profile of the latter being determined so as to compensate the weakening of the drive force generated by the spring of the jack during its relaxation. The invention is used especially in brake systems for heavy vehicles.
    Type: Grant
    Filed: May 18, 1984
    Date of Patent: April 15, 1986
    Assignee: Societe Anonyme D.B.A.
    Inventors: Jean-Jacques Carre, Yves Meyer
  • Patent number: 4577548
    Abstract: The servomotor incorporates a component (50, 51) for retaining and positioning the plunger (12) forming the movable seat (11) for the valve mechanism (9) of the servomotor, the retaining component incorporating a cylindrical component (50) pivoting in the valve body (8) about an axis perpendicular to the direction of movement of the plunger (12), provided with a longitudinal groove (57) bounded by a first cam surface (58) cooperating with a shoulder (47) of the plunger (12) and a follower lever (51) outside the valve body (8) and incorporating a profiled edge (60) cooperating, on the return of the servomotor towards its rest position, with a ring (43) mounted in the neck (21) of the casing (1).
    Type: Grant
    Filed: February 15, 1985
    Date of Patent: March 25, 1986
    Assignee: Societe Anonyme D.B.A.
    Inventor: Jean P. Gautier
  • Patent number: 4576257
    Abstract: The disc brake incorporates a caliper (28) formed of two axially opposed beams (38, 40) and of two arms which are circumferentially spaced and which define a radial opening for the mounting/removal of friction components (56-62). The caliper incorporates a third arm (64) lying above the opening and mounted, so as to hinge about a shaft (68), on one (40) of the beams, members (66, 76, 78) being provided to join rigidly the third arm to the other (38) beam. An assembly is provided, for example an eccentric assembly, in the region of the shaft (68), to join the third arm to the caliper recovering the manufacturing tolerances of the brake.
    Type: Grant
    Filed: July 11, 1984
    Date of Patent: March 18, 1986
    Assignee: Societe Anonyme D.B.A.
    Inventors: Jean J. Carre, Guy Meynier
  • Patent number: 4576255
    Abstract: The invention relates to a multi-disc brake comprising a stationary rotary disc (1) and a movable rotary disc (2) which is mounted on a splined sleeve (5) sliding on the hub (3) of axis (14) and with which the disc (1) is solid. An assembly of friction pads (6-9) can interact with the discs (1, 2) under the action of a hydraulic jack (13). To prevent any rattling at the start of each braking operation, elastic blocks (50) are inserted inside housings provided in the system of splines of the sleeve (5) and of the hub (3) and, when expanded, draw the flanks of the splines against one another in working contact during a braking operation.
    Type: Grant
    Filed: June 21, 1984
    Date of Patent: March 18, 1986
    Assignee: Societe Anonyme D.B.A.
    Inventors: Jean-Claude Mery, Jean-Jacques Carre, Alain Thioux
  • Patent number: 4571942
    Abstract: The servomotor, of the vacuum type, comprises a housing composed of two shells, each comprising a peripheral sleeve and a side end wall. The shells include a connecting web between the sleeve and the side wall, parabolic in profile, due to which the resultant of shearing and traction stresses is minimal, which allows the thickness of the shell material to be significantly reduced. Applications are braking systems with vacuum servomotor for motor vehicles.
    Type: Grant
    Filed: November 15, 1982
    Date of Patent: February 25, 1986
    Assignee: Societe Anonyme D.B.A.
    Inventors: Jean-Jacques Carre, Yves Meyer
  • Patent number: 4567968
    Abstract: The invention relates to a locking element for a disc brake with a sliding caliper and a disc brake comprising such a locking element. The brake includes a caliper mounted in sliding relationship on a fixed support by two axial posts cooperating with bores formed in the caliper. The bores are provided with indentations allowing the introduction of the posts transversely and without dismounting the latter. One of the posts is provided with a locking bush maintained locked to the caliper by a locking element of which one portion passes through an orifice formed in the caliper and locking the bush and of which another portion in the shape of a U fixes the locking element relative to the caliper.
    Type: Grant
    Filed: January 16, 1984
    Date of Patent: February 4, 1986
    Assignee: Societe Anonyme D.B.A.
    Inventor: Michel Denree
  • Patent number: 4564089
    Abstract: The lining support plate (11) incoporates a widened lug part (16) which prolongs a neck part (15) round which is arranged the end loop (31) of the wire spring (30), of which the end of the strand portion (32) opposite the loop (32) has at least one transverse bent part (37) intended to be received in a central through-orifice (22) in the plate (11).
    Type: Grant
    Filed: December 2, 1983
    Date of Patent: January 14, 1986
    Assignee: Societe Anonyme D.B.A.
    Inventor: Jean-Louis Gerard
  • Patent number: 4560038
    Abstract: A disc brake comprises a torque-supporting member (10) with which is associated an actuating mechanism (28) to stress at least one friction element (22) against a rotating disc (18), this element (22) comprising a lining-holding plate (38) on which a friction lining is mounted. The plate (38) interacts so as to be anchored and to slide with guide surfaces formed on the torque support (10), and an anti-noise spring (48) interacts with the friction element (22) and with the torque support (10). According to the invention, the lining-holding plate (38) has an assembly aperture (46) for the anit-noise spring (48) and this aperture has a bearing portion and a widened assembly portion which opens into the bearing portion and onto one edge of the lining-holding plate (38). The anti-noise spring (48) interacts with at least one part of the bearing portion so as to stress the friction element (22).
    Type: Grant
    Filed: January 17, 1985
    Date of Patent: December 24, 1985
    Assignee: Societe Anonyme D.B.A.
    Inventors: Jean-Louis Gerard, Claude Le Marchand, Marcel Raguier
  • Patent number: 4560036
    Abstract: The subject of the invention is a disc brake of the type with a caliper (1) mounted to slide on a fixed support (5, 30) by means of two pins (3, 4). The caliper incorporates a brake motor (9) which is capable of stressing an inner pad (8) directly and an outer pad (7) via the sliding caliper (1) to engage frictionally with a brake disc (2). According to the invention, the caliper (1) is located without appreciable play between a front stop (26) and a rear stop (27) placed respectively opposite a front end (24) and a rear end (25) of the caliper. Depending on the direction of rotation of the disc (2), one or the other of these stops (26, 27) fixed to the fixed support (5, 30) receives all or some of the forces generated by the pads (7, 8) and transmitted to the caliper (1) with which the pads (7, 8) interact.
    Type: Grant
    Filed: January 5, 1984
    Date of Patent: December 24, 1985
    Assignee: Societe Anonyme D.B.A.
    Inventor: Roger Tourneur
  • Patent number: 4559692
    Abstract: Method of crimping the locking ring of a ball joint. 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: Grant
    Filed: December 15, 1983
    Date of Patent: December 24, 1985
    Assignee: Societe Anonyme D.B.A.
    Inventor: Gerard Morin
  • Patent number: 4560209
    Abstract: The braking corrector according to the invention consists of two corrector valve seats (332, 332') and two inertia weights (328, 328') mounted in parallel in the same casing (312), and two magnets (336, 336') mounted on the same iron plate (340), the magnetic poles of the magnets being reversed so that the magnetic field (M) set up by the magnets (336, 336') is looped through the plate (340) on the one hand, and through the inertia weights (328, 328') on the other.
    Type: Grant
    Filed: August 3, 1983
    Date of Patent: December 24, 1985
    Assignee: Societe Anonyme D.B.A.
    Inventors: Jean-Jacques Carre, Pierre Pressaco