Bendix Europe Services Techniques

Alliedsignal Europe Services Techniques

Robert Boschgmbh

Bosch Systems De Freinage

Bosch Systemes De Freinage

Robert Bosch Technology Corporation

Ulysse Verbo

Jean Pierre Gautier

Jean-Pierre Gautier

Miguel Perez Revilla

Miguel Perez

Philippe Richard

Jean-Charles Maligne

Cedric Leboisne

Flavio Cobianchi

Roland Levrai

Jean-Pierre Michon

Stéphane Lacroix

Jean-Marc Attard

Silverio Batista

Juan Simon Bacardit

Philippe Georges Castel

Guy Meynier

Fernando Sacristan

Antony Auguste

Michael Hellebrandt

Aleksander Hurwic

Daniel Grech

Jean J Carre

C&eacute;dric Leboisne

Maurice Gebauer

Bernard Tripier

Alfonzo Valenzuela

Jean Marc Attard

Jacques Houplain

Salvatore Spinello

Jean Claude Monteillet

Perez Revilla

Miguel Perez-Revilla

Raphael Medina

Silverion Batista

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

An arrangement () for disconnectably coupling an axially orientated motor vehicle brake booster control rod () to a brake pedal (). A first end () of the control rod () is coupled to an intermediate part () of a vertical actuating bar () of the brake pedal (). The first end () has a head () with at least one spherical bearing surface () that is housed in a complementary boss () formed in a wall of the intermediate part (). The head () is kept in contact with the boss () via elastically deformable axial retention means () interposed between the intermediate part () of the actuating bar and the control rod (). The deformation is controlled by an unlocking arrangement () that accessible from outside of the intermediate part () of the actuating bar ().

Booster control rod coupling arrangement

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 pneumatic brake booster comprising an envelope of longitudinal axis formed of a dish having a rim and a lid. The envelope defines an interior volume that is divided into a variable-pressure work chamber and a low-pressure chamber by a skirt. The skirt is mounted to sealingly slide along the longitudinal axis of the envelope. The skirt has a central orifice with a pneumatic piston sealingly mounted therein. The sealing between the variable-pressure work chamber and the low-pressure chamber is achieved by a first sealing member arranged between a radially internal first end of the skid and a radially external end of the piston and a second sealing member arranged at a radially external second end of the skid and an internal surface of the rim. The skid provides sealing between the radially external first end of the skirt and the radially internal second end of the skirt.

Pneumatic brake booster comprising improved sealing means

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 braking device for a motor vehicle, including a master cylinder () with a primary piston () subjected to an actuating force of an input force exerted by a manual operating member () and a boost force exerted by a booster () coupled to the manual operating member () and an emergency assist valve (VA). Valve (VA) comprises: a reaction piston () sliding in a bore () of the primary piston () and urged toward a position of rest by by an elastic return member (); a rapid piston () having a cross section smaller than the reaction piston () and sliding in a sealed manner in a bore () of a bushing () in bore (; and a ratio control () actuated by a plunger distributor () driven by the manual operating member (). The elastic return member () is arranged outside of the primary piston () and a transmission element (T) is provided to transmit a return force of the elastic return member () to the reaction piston ().

Brake booster with high kick-off emergency valve

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

A boosted braking device for a motor vehicle having a master cylinder (M) and a pneumatic booster (S). The booster (S) has a rigid casting ( ) divided by a mobile partition ( ) into at least a front chamber ( ) and a rear chamber ( ). A three-way valve ( ) carried by the mobile partition ( ) is actuated by a control rod ( ) to control the pressure in the rear chamber ( ) for operating the master cylinder (M). The casing ( ) includes a front shell ( ) and a rear shell ( ) each of which comprises a radial shoulder ( ) and being secured together by hooping ( ) interconnecting with the shoulders ( ) of the front shell ( ) and rear shell ( ). The hooping ( ) comprises first ( A) and second ( B) part hoops. The first ( A) and second ( B) part hoops are joined together by at least one locking element ( ) which is rendered non-functional when the master cylinder (M) is subjected to substantial stress as a result of a frontal or oblique impact of the vehicle.

Boosted braking device with passive safety

A pneumatic booster operated by a plunger (,) located in a piston (,) with a rear section (,) which operates a valve (,) to develop a force on the piston (,) to apply a boost force to force-transmission members (,). The plunger (,) has a first section (,) connected to the rear section (,) by a spring (,). The front section (,) and the force-transmission members (,) defining a retention assembly (,) for securing the front section (,) to the piston (,) when a boost force exceeds a predetermined threshold while the plunger (,) is in a maximum actuating position to allow for extended actuation of the booster following a sharp braking action.

Pneumatic-servomotor with force-controlled boosting

A braking device having a pneumatic booster (,) having a rigid casing (,) defined by a front shell (,) and a rear shell (,). The interior of the rigid casing (,) being separated into a front chanber (,) and a rear chamber (,) by a movable partition (,). The booster (,) is reinforced by a strut (,) with a screw (,) which passes through the front shell (,), movable partition (,) and rear shell (,). The screw (,) has front end (,) and a rear end (,) separated from an intermediate cylindrical section (,). A sleeve (,) which extends from the rear shell (,) receives the second end (,) of the screw (,) and allows the screw (,) to axially slide with respect to the rear shell (,). A stop (,) on the intermediate section (,) prevents the second end (,) from projecting from the rear shell (,) until the first end (,) is rotated into engages the front shell (,) and threads on the second end engage corresponding threads on a support (,) to fix the booster (,) to the support (,).

Braking device with simplified strut

Pneumatic servomotor with controlled power-assist positioning

Growing community of inventors

Aulnay-sous-Bois, France

Ulysse Verbo