PNEUMATIC BRAKE BOOSTER HAVING A SEALING ELEMENT
First Claim
1. A pneumatic brake booster having a booster housing, wherein the booster housing has at least two thin-walled shell elements and an elastomer sealing element, wherein 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, and the sealing bead is sealingly clamped in a clamping space between the shell elements, wherein the clamping space is formed by walls which are generated in the shell elements by deformation, whereina rolling-diaphragm-side end wall of the clamping space is formed by an encircling radial shoulder of the first shell element,a radial outer wall is formed by a tubular projection which extends from the shoulder substantially in an axial direction,a radial inner wall is formed by a tubular, axially forwardly extending projection, which is folded at its front edge, of the second shell element,wherein 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.
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Accused Products
Abstract
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.
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Citations
10 Claims
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1. A pneumatic brake booster having a booster housing, wherein the booster housing has at least two thin-walled shell elements and an elastomer sealing element, wherein 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, and the sealing bead is sealingly clamped in a clamping space between the shell elements, wherein the clamping space is formed by walls which are generated in the shell elements by deformation, wherein
a rolling-diaphragm-side end wall of the clamping space is formed by an encircling radial shoulder of the first shell element, a radial outer wall is formed by a tubular projection which extends from the shoulder substantially in an axial direction, a radial inner wall is formed by a tubular, axially forwardly extending projection, which is folded at its front edge, of the second shell element, wherein 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.
Specification