Patent US5432622A successfully refreshed from Google Patents.
EP0154154A2
Expired / Lapsed
EP
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Vacuum brake booster
Assignee: Honeywell International Inc
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Filing: 1985-01-29
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Granted: —
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Expires: 2005-01-29
Abstract
Abstract A vacuum brake booster includes a pair of diaphragms which move in opposite directions during a brake application. One of the diaphragms is connected to a valve assembly to generate a first force assisting braking while the other diaphragm generates fluid pressure in an output chamber formed substantially by the valve assembly. The fluid pressure in the output chamber generates a second force assisting braking.
Inventors
- 👤 Robert F. Gaiser
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 08:15
CPC Classifications
B; B60; B60T; B60T13/00; B60T13/10; B60T13/24; B60T13/46; B60T13/52; B60T13/57; B60T13/563; B60T13/567
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
161 words
A vacuum brake booster comprising a housing (32) with a cavity receiving at least a pair of diaphragms (34, 36) dividing the housing cavity into a plurality of chambers (38, 40, 42), the housing movably carrying a valve assembly (50) operable to control communication of fluid pressure to one of said plurality of chambers in order to move said pair of diaphragms (34, 36) in opposite directions during braking and impart separate forces to said valve assembly for movement of the latter in one direction so that a power assist is generated during the brake application, characterized in that said housing (32) cooperates with said valve assembly to define an output pressure chamber (70) and one (36) of said plurality of diaphragms is movable in an opposite direction relative to movement of said valve assembly (50) during the brake application to generate fluid pressure in said output pressure chamber to bias said valve assembly (50) to move during the brake application.
Claim 2
Dependent Claim
161 words
A vacuum brake booster comprising a housing (32) with a cavity receiving at least a pair of diaphragms (34, 36) dividing the housing cavity into a plurality of chambers (38, 40, 42), the housing movably carrying a valve assembly (50) operable to control communication of fluid pressure to one of said plurality of chambers in order to move said pair of diaphragms (34, 36) in opposite directions during braking and impart separate forces to said valve assembly for movement of the latter in one direction so that a power assist is generated during the brake application, characterized in that said housing (32) cooperates with said valve assembly to define an output pressure chamber (70) and one (36) of said plurality of diaphragms is movable in an opposite direction relative to movement of said valve assembly (50) during the brake application to generate fluid pressure in said output pressure chamber to bias said valve assembly (50) to move during the brake application.
Claim 3
Dependent Claim
67 words
The vacuum brake booster of claim 1 further characterized by said housing (32) comprising a front shell (26) adapted for connection with a master cylinder (16) and a rear shell (28) extending from said front shell to a support (30) adapted for attachment to a vehicle, said support (30) defining a bore (62) for receiving a piston (64) which is operatively connected with said one diaphragm (36).
Claim 4
Dependent Claim
34 words
The vacuum brake booster of claim 1 in which said master cylinder (16) includes a reservoir carrying a fluid therein and said output pressure chamber (70) is selectively communicated to said master cylinder reservoir.
Claim 5
Dependent Claim
40 words
The vacuum brake booster of claim 2 in which said support (30) defines a central opening (48) receiving said valve assembly (50), said support (30) defining a first passage (72) leading from said bore (62) to said central opening (48).
Claim 6
Dependent Claim
47 words
The vacuum brake booster of claim 2 in which said support central opening (48) defines a small diameter section (108) sealingly engaging said valve assembly and a large diameter section (106) sealingly engaging said valve assembly whereby said output pressure chamber (70) extends between said sealing engagements.
Claim 7
Dependent Claim
36 words
The vacuum brake booster of claim 2 in which said piston (64) is movable in said support bore (62) during braking to communicate fluid pressure from said support bore (64) to said output pressure chamber (70).
Claim 8
Dependent Claim
24 words
The vacuum brake booster of claim 1 in which said output pressure chamber (70) is annular in shape to surround said valve assembly (50).
Claim 9
Dependent Claim
55 words
The vacuum brake booster of claim 1 in which said support (30) fixedly carries an inner edge of said one diaphragm (36) at an end of said support (30) adjacent another of said pair of diaphragms and said support end opposes said valve assembly (50) to define a rest position therefor upon termination of braking.
Claim 10
Dependent Claim
25 words
The vacuum brake booster of claim 2 in which said piston (64) is operatively connected to said one diaphragm (36) adjacent an inner edge therefore.
Claim 11
Dependent Claim
25 words
The vacuum brake booster of claim 2 in which said pair of diaphragms (34, 36) extend axially away from support in a radially outer direction.
References Cited (Backward Citations)
No citation records indexed.
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