Robert Boschgmbh

Bendix France

Societe Anonyme D.b.a.

Bendix Europe Services Techniques

Jean-Charles Maligne

Ulysse Verbo

Philippe Richard

Stéphane Lacroix

Jean-Louis Magnaval

Roland Levrai

Michael Hellebrandt

Silverio Batista

Franck Bequet

Gislain Escarabajal

A device including a master cylinder driven by a control member, an enclosure for a pneumatic booster having a rear chamber separated from a front chamber by a piston, first and second balancing valve elements place the rear chamber in communication with the front chamber, first, second and third intake valve elements place the rear chamber in communication with a pneumatic pressure source, and a tubular support. The balancing valve elements are carried by a balancing part of the support and the pneumatic piston while the intake valve elements are carried by the first part of the control member, an intake part of the support and a second part of the control member. The first and second parts of the control member are connected through a spring arrangement for adjusting the relative axial position thereof as a function of the power of the force applied to the control member.

Booster and brake control device fitted with this booster

A device comprised a master cylinder driven by a control member (), a pneumatic booster (), a piston (), first (VE) and second (VE) balancing valve elements, first (VA) and second (VA) intake valve elements, and a tubular support () provided with two parts (A,B) move relative to one another to adjust the length of the support (). The balancing valve elements (VEVE) are borne by a balancing part (B) of the support and the pneumatic piston (). The intake valve elements (VAVA) are borne by the control member () and an intake part (A) of the support. The two parts (B,A) of the support are connected to one another by a spring () and arm () arrangement for adjusting the separation thereof as a function of the power of the force applied to the control member ().

Brake control device

A pneumatic brake booster () for a motor vehicle comprising a casing () within a moving partition () is secured to a moving piston () having an inlet valve () and a re-equalizing valve () with offset seats borne by first () and second () tubular sleeves, The first sleeve () is slideably mounted in the moving piston () with a travel (d) which is determined by first bayonet-fitting () that is interposed between the first sleeve () and the moving piston () and that are locked against rotation by the second sleeve ().

Pneumatic booster with shifted valve seats

An arrangement () for the fixing of an axially oriented (A) brake booster () on a dashboard () of an automobile wherein a rear face () of the booster () is fixed on a front face () of the dashboard () through a first bayonet fitting () interposed between the rear face () of the booster () and the front face () of the dashboard () to prevent the brake booster () from rotating.

Arrangement for the bayonet-fixing and locking of a brake booster

A pneumatic servomotor for power-assisted braking for a motor vehicle having a control rod () for opening and closing at least one axial inlet valve () that is interposed between a front chamber () connected to a pressure source having a pressure (Pa) greater than a first pressure (P) and a back chamber () and at least one axial balancing valve () for actuating a moving partition () located between the front chamber () and the back chamber (). The servomotor being characterized by one-piece floating tubular element () having axially offset transverse faces () that have sealing elements () for sealing the axial inlet valve () and the balancing valve () with the control rod () being activated by a dish-shaped washer () carrying two springs () of different stiffnesses.

Brake servo-unit comprising a floating element bearing offset valve seats

A brake booster comprising an envelope () having a longitudinal axis (X) formed of a first () and of a second () shell to define an interior volume divided by moving a skirt into a low-pressure first chamber and a variable-pressure second chamber. A three-way valve () actuated by a control rod places the front chamber and the rear chamber in communication at rest and during a braking phase interrupts the communication between the front chamber and the rear chamber and thereafter allows communication of pneumatic fluid at high pressure to the rear chamber. The booster is attached to the master cylinder by a clip-fastening arrangement wherein tabs () that radially extend from a sleeve tube () are plastically deformable in the radial direction on enter into a passage () in a flange () of the master cylinder and returning to the initial position when the attachment operation is complete.

Pneumatic brake booster for use in a brake system

A pneumatic brake booster for a motor vehicle, of the type in which the movements of a control rod () are able to determine the openings and closings of at least one axial intake valve () which is inserted between a pressure source subjected to the pressure (P) higher than the first pressure (P) and a rear chamber () of the booster, and of at least one axial equalizing valve () which is inserted between a front chamber () and the rear chamber (), to actuate a moving partition () inserted between the front chamber () and the rear chamber (), characterized in that it comprises a tubular element () of which axially offset transverse faces () comprise first elements () for sealing the axial intake and equalizing valves () and that the control rod () is able to operate via two concentric springs () having different stiffnesses.

Pneumatic booster comprising tubular intake and equalizing valves

A pneumatic brake booster for a motor vehicle wherein movements of a control rod ( ) determine the openings and closings of at least one axial intake valve ( ) and at least one equalizing valve ( ). The intake valve ( ) being inserted between a pressure source subjected to the pressure (P ) higher than the first pressure (P ) and a rear chamber ( ) of the booster, and the equalizing valve ( ) being inserted between a front chamber ( ) and the rear chamber ( ) to actuate a moving partition ( ) located between the front chamber ( ) and the rear chamber ( ). A tubular element ( ) of that is axially offset transverse faces ( ) comprised of first elements ( ) for sealing the axial intake and equalizing valves ( ).

Pneumatic booster

The invention concerns an electromechanical control having a centrifugal structure comprising a shaft (22) driven in rotation by an electric motor (20) and defining an axis, at least two flyweights (38) capable of moving under the effect of a centrifugal force between a plate (34) and a disk (32), the plate (34) being able to be driven in rotation by the shaft, and a wedge device (12). According to the invention, the shaft (22) is mounted movably in axial translation to drive in translation the wedge device (12), and the plate (34) is axially fixed whereas the disk (32), which solidly fixed to an axial sleeve (30) forming, with the end (24) of the shaft (22), a lockable screw-nut assembly, is capable of axial translation and can be driven in rotation by the shaft (22), the radial position of the flyweights (38) determining the separation of the disk (32) and the plate (34). Application to the braking of vehicles.

Electromechanical control having a centrifugal structure

The invention relates to an automatically adjustable spacer for a drum brake, comprising essentially a first part (10) bearing at one of its ends on a first shoe (3), a second part (16) bearing at the opposite end on the second shoe (2), the first and second parts (10, 16) being mounted slidably longitudinally relative to one another, a locking element (30), at least part of the periphery of which has a toothing, mounted movably on one of the first and second parts and capable of meshing with a corresponding toothing (28) provided opposite it on part of the periphery of the other of the first and second parts, so as to define a device for the automatic extension of the spacer as a function of the wear of the friction elements. The locking element (30) which is mounted movably in terms of rotation about a pin (32) and pin being mounted movably in terms of longitudinal translational motion in a slot provided in the part (10), is in form of a toothed cam the rotational movement of which results in an increase of the distance between the pin (32) and the meshing zone of the toothings, and a spring imparts a rotational movement to the locking element as soon as the toothing no longer mesh with one another.

Automatically adjustable spacer for a drum brake

The invention relates to a drum brake with two shoes, each having a web (16) and a rim (18), of which the face confronting the drum receives a friction lining (20). The drum brake is arranged on a supporting plate (10) and also includes a mechanical control lever (34) comprising a body of considerable length and of small thickness in relation to its width, the body having, at a first end (36), an orifice (38) intended for receiving an articulated connection with the web (16) of one of the shoes (14) at an intermediate point near the orifice, and a notch intended for interacting with a spacer (62) making it possible to subject the shoes (12, 14) to a stress moving them away from one another, and at the second end (40), a fastening point for an actuating cable (54) of the lever. The cable is equipped with a ferrule (60) at its end interacting with the lever. According to the invention, that face of the body confronting the web (16) is substantially plane between the first end (36) and an intermediate point (42) near the second end; at this latter point (42), the body is bent so as to define a part (44) diverging substantially from the web (16), the fastening point (48) being formed by bending the end part (46) of the second end (40) in such a way that it comes to rest between the web (16) and the part (44) diverging substantially from the web, all this in such a way that, between substantially the intermediate point (42) near the second end and the latter (40), the divergence between the web (16) and that part of the body confronting the web is substantially greater than the diameter of the cable (54 ) and less than that of the ferrule (60).

Drum brake with postponed fitting of the mechanical control cable

Assembly consisting of a suspension element (20) and of a brake corrector (10) intended to be subject to the load of a vehicle, the corrector (10) comprising a body in which slides a piston (12) forming a shutter element capable of opening or closing a hydraulic passage between an inlet (14) and an outlet (16) of the corrector, the piston (12) being connected by a connection mechanism to a spring mechanism (23) of the suspension element (20), characterized in that the connection mechanism comprises a lever (24) mounted on the suspension element (20) between two pivoting elements (28; 32) which are subjected to the force exerted by the suspension element (20) and which are arranged so as to transmit some of the force to the lever (24).

Brake corrector subject to the load of a vehicle

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.

Growing community of inventors

Aubervilliers, France

Jean-Charles Maligne