Robert Boschgmbh

Bosch Sistemas De Frenado S.l.

Joan Simon Bacardit

Bruno Berthomieu

Fernando Sacristan

Francisco Carles

A vacuum operated brake booster, comprises a casing including a base defining at least one hole, and at least one tube extending through the casing and configured to receive a screw for fastening the brake booster to a wall of a passenger compartment of a vehicle. The tube defines a rear end with a peripheral fold forming a rear groove, and an extension extending beyond the rear groove, the extension defining a first outer edge and being configured to be folded toward an outer side of the tube to form a crimping lip. The at least one hole is bordered by a recessed ring having a form complementary to that of the rear groove of the rear end of the at least one tube. The extension is configured to be folded above a second outer edge of the recessed ring and blocked in the groove.

Vacuum brake booster provided with tubes for fixing screws to pass through and method for producing same

A vacuum brake booster includes a housing in which a piston is accommodated, the piston being supported by a cylindrical body sealingly passing through an opening in the bottom and having a key that engages with the return element of the cylindrical recess. A damping element separates the front of the key from the rear of the base supporting the piston and the bead of the membrane.

Vacuum brake booster

A vacuum-operated brake booster includes a housing which consists of a bottom and a cover having an intermediate piston through which tubes, through which attachment screws are to pass, extend. The front end of the tube is threaded, and a peripheral groove is provided behind the thread, a flange being crimped in the groove behind the cover in the housing. The master cylinder is attached via the lugs thereof, which are fitted into the front end of the tube against the front surface of the cover and locked by the nut screwed onto the thread. The front end of the tube has a peripheral groove receiving the flange that consists of a ring and a sleeve, the lip of which penetrates into the groove by crimping. A gasket completes the seal.

Vacuum brake booster having tubes through which attachment screws pass and method for realizing same

A sensor feeler device for a brake booster. The sensor feeler device () includes an axially moveable cylinder (), the movement of which can be controlled by the control rod which is itself controlled by the brake pedal, a sensor feeler piston () able to move axially in said moving cylinder (), and a spring () that tends to push the sensor feeler piston () forward and keep its front face substantially in the same plane as the front face of the moving cylinder.

Brake boost sensor feeler

A plunger arrangement ( ) for a braking servomotor that has an actuating piston to provide a force to activate a master cylinder. The plunger arrangement ( ) is located in a bore of a movable wall ( ) that separates the interior of the servomotor into a front chamber and rear chamber, The plunger arrangement ( ) is connected to a resiliently returned control rod ( ) and slides in bore as a function of an input force to define a braking application. The end of the plunger arrangement ( ) is slidingly fitted so as to bias a reaction disk of the actuating rod and transmit a reaction force to the control rod. The plunger arrangement ( ) includes a unidirectional clutch device ( ) comprising a key ( ) and a sleeve ( ) that are slidably mounted on a plunger ( ) such that when the control rod ( ) is actuated at a given speed the sleeve ( ) is locked in the bore of the movable wall ( ), independently of the control rod ( ), to maintain a braking application.

Servomotor with a deformation-adjustable sleeve and setup for the adjustment of such sleeve

The invention provides a pneumatic servomotor for an assisted braking of a motor vehicle, of the type comprising a unidirectional clutch device, which includes a coaxial sleeve ( ), sliding on a plunger ( ), and axial-locking means, which are capable of locking said sleeve ( ) in an end front axial position, in which it locks the piston ( ) independently of the control rod ( ), when an input force is applied at a given speed on the control rod ( ) integral with the plunger ( ), characterised in that the unidirectional clutch device comprises damping means, made of an elastomeric material and interposed between a stop-forming transverse intermediate face ( ) of the plunger ( ) and an opposite transverse face ( ) of the sleeve ( ), so as to permit, once the input force is released and when the locking means no longer lock the sleeve ( ), the noiseless return of the sleeve ( ) to its rear rest position.

Emergency braking brake booster comprising soundproofing means

A braking servomotor ( ) having a rigid casing ( ) with a movable wall ( ) location therein to define a front chamber ( ) and a rear chamber ( ). The movable wall ( ) carries a piston ( ) that slidably receives an actuating rod ( ) for a master cylinder ( ). A control rod ( ) is sliding located in a bore inside a piston ( ) and moved as a function of an input force. The control rod ( ) has an end that bears against a plunger ( ) that has a finger ( ) that biases a reaction disk ( ) located at the rear surface of the actuating rod ( ) to transmit a reaction force from the actuating rod through the plunger to the control rod. The servomotor ( ) is characterised by a unidirectional clutch device ( ) that responds to a predetermined speed at which an input force is applied to the control rod ( ) to lock the actuating rod in relation to the piston ( ), independently, of the reaction disk ( ), the plunger ( ) and the control rod ( ).

Growing community of inventors

Barcelona, Spain

Joan Simon Bacardit