A pneumatic brake booster for a hydraulic motor-vehicle brake system, including a booster housing, having a front and a rear housing shell, and at least one connecting pin, which is arranged in the booster housing such that the at least one connecting pin extends axially parallel to the center axis and which supports the booster housing from the inside by two supporting formations and which protrudes through the booster housing from the inside to the outside on at least one side by an end segment. In order to ensure simple intermediate handling of the brake booster before and during the assembly of the brake system and to improve the durability and corrosion resistance, the housing shells are arranged in such a way that the housing shells are each connected to the connecting pin such that the housing shells are secured against being axially moved apart from each other.

A check valve of this negative pressure-type booster device is provided with: a cylindrical section that is integrally formed with a shell disposed on one side, communicates with a connection pipe, and is formed in a cylindrical shape protruding toward the inside of a housing; and a valve body section that is disposed inside the cylindrical section, and is axially fitted, within the cylindrical section, to the cylindrical section such that air is permitted to flow from a negative pressure chamber to the connection pipe while the air is prohibited from flowing from the connection pipe to the negative pressure chamber.

A pneumatic brake booster having a vacuum chamber and a working chamber in a booster housing separated from one another by an elastic diaphragm. The diaphragm bears in regions against a diaphragm plate axially displaceable between a zero position and a maximum stroke. An axial spacing between the zero position and the maximum stroke defines a stroke range of the brake booster. The diaphragm has a rolling fold which, during the displacement of the diaphragm plate, rolls on a rolling region on an inner wall of the booster housing. In order to offer a solution in which it is the intention for a modular system for different stroke ranges to be formed more efficiently and for the efficiency loss to be minimized or avoided, the booster housing has, in the rolling region, a tapered, conical portion with a cone angle 8 and an axial extent >*stroke range.

A pneumatic brake booster having a vacuum chamber and a working chamber in a booster housing separated from one another by an elastic diaphragm. The diaphragm bears in regions against a diaphragm plate axially displaceable between a zero position and a maximum stroke. An axial spacing between the zero position and the maximum stroke defines a stroke range of the brake booster. The diaphragm has a rolling fold which, during the displacement of the diaphragm plate, rolls on a rolling region on an inner wall of the booster housing. In order to offer a solution in which it is the intention for a modular system for different stroke ranges to be formed more efficiently and for the efficiency loss to be minimized or avoided, the booster housing has, in the rolling region, a tapered, conical portion with a cone angle 8 and an axial extent >*stroke range.

A method of assembling a power brake assembly including a brake booster and a master cylinder defining a chamber disposed between at least one reservoir port and at least one brake line port begins by inserting the master cylinder into the brake booster. The method proceeds by monitoring for a pressure differential between the at least one reservoir port and the at least one brake line port of the master cylinder during the insertion step, and then ceasing insertion of the master cylinder into the brake booster in response to sensing a pressure differential. The method proceeds by withdrawing the master cylinder a distance from within the brake booster; and securing the brake booster to the master cylinder after retracting the master cylinder the distance.

A method of assembling a power brake assembly including a brake booster and a master cylinder defining a chamber disposed between at least one reservoir port and at least one brake line port begins by inserting the master cylinder into the brake booster. The method proceeds by monitoring for a pressure differential between the at least one reservoir port and the at least one brake line port of the master cylinder during the insertion step, and then ceasing insertion of the master cylinder into the brake booster in response to sensing a pressure differential. The method proceeds by withdrawing the master cylinder a distance from within the brake booster; and securing the brake booster to the master cylinder after retracting the master cylinder the distance.

A pneumatic brake booster having a booster housing. The booster housing has at least two thin-walled shell elements and an elastomer sealing element. The sealing element has a sealing bead, which is of encircling form radially at the outside, and at least one rolling diaphragm portion which adjoins the sealing bead. The sealing bead is sealingly clamped in a clamping space between the shell elements. The clamping space is formed by walls which are generated in the shell elements by deformation, its radial inner wall formed by a tubular, axially forwardly extending projection, which is folded at its front edge, of the second shell element. It is proposed that a bead-side rear wall of the clamping space is formed by an encircling, radially outwardly projecting collar which is formed on the second shell element.

A pneumatic brake booster having a booster housing. The booster housing has at least two thin-walled shell elements and an elastomer sealing element. The sealing element has a sealing bead, which is of encircling form radially at the outside, and at least one rolling diaphragm portion which adjoins the sealing bead. The sealing bead is sealingly clamped in a clamping space between the shell elements. The clamping space is formed by walls which are generated in the shell elements by deformation, its radial inner wall formed by a tubular, axially forwardly extending projection, which is folded at its front edge, of the second shell element. It is proposed that a bead-side rear wall of the clamping space is formed by an encircling, radially outwardly projecting collar which is formed on the second shell element.

A pneumatic brake booster including a booster housing having at least one housing shell. The housing shell is designed to be substantially pot-shaped with a center axis, a base portion and a lateral portion, and the base portion has a curved or conical wall region. In order to offer a brake booster by which it is possible to cost-effectively realize improved adaptability to customer- and application-specific requirements with respect to the spatial connection arrangement, at least one flattened surface area is formed in a radial outer region of the base portion, is designed to be elongate in the circumferential direction and has, at its radial outer edge, at least two notches which are arranged with respect to one another in a defined grid pattern with a circle angle.

A pneumatic brake booster including a booster housing having at least one housing shell. The housing shell is designed to be substantially pot-shaped with a center axis, a base portion and a lateral portion, and the base portion has a curved or conical wall region. In order to offer a brake booster by which it is possible to cost-effectively realize improved adaptability to customer- and application-specific requirements with respect to the spatial connection arrangement, at least one flattened surface area is formed in a radial outer region of the base portion, is designed to be elongate in the circumferential direction and has, at its radial outer edge, at least two notches which are arranged with respect to one another in a defined grid pattern with a circle angle.