US3696711A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roll diaphragm brake
Assignee: Berg Manufacturing Co
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Filing: 1970-12-28
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Granted: 1972-10-10
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Expires: 1990-12-28
Abstract
Abstract A light weight, compact service and emergency brake assembly employing a roll diaphragm in the emergency chamber, a rearwardly extending mechanical release, a cup-shaped movable wall carrying one end of the roll diaphragm and having an axial member riding on the inner and outer sides of an integral housing sleeve. A service chamber has two diaphragms with seal means carried by one diaphragm to preclude loss of service pressure.
Inventors
- 👤 Arthur A Berg
- 👤 Boleslaw Klimek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:55
CPC Classifications
B; B60; B60T; B60T17/00; B60T17/08; B60T17/083
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
186 words
In a spring-applied, pressure-released, fluid pressure chamber, a movable wall in said chamber, a flexible sleeve having one of its ends attached to said wall and the other of its ends attached to said chamber, the periphery of said wall being spaced from the opposed inner wall of said chamber, said flexible sleeve bridging and sealing said space, an elongated, axial, cup-shaped member secured to said movable wall and extending in opposite directions from said movable wall, the closed end of said member extending outwardly of said chamber, a first rigid, hollow sleeve secured within said member and extending the length thereof in spaced relation with the inner wall of said member, a second, rigid, hollow, axial sleeve on the rear wall of said chamber and extending inwardly of said chamber and between said inner wall of said member and said first hollow sleeve, guide means carried by said inner wall of said member and the outer wall of said first sleeve, said guide means engaging the outer and inner walls, respectively, of said second sleeve throughout the excursion of said movable wall within said chamber.
Claim 2
Dependent Claim
186 words
In a spring-applied, pressure-released, fluid pressure chamber, a movable wall in said chamber, a flexible sleeve having one of its ends attached to said wall and the other of its ends attached to said chamber, the periphery of said wall being spaced from the opposed inner wall of said chamber, said flexible sleeve bridging and sealing said space, an elongated, axial, cup-shaped member secured to said movable wall and extending in opposite directions from said movable wall, the closed end of said member extending outwardly of said chamber, a first rigid, hollow sleeve secured within said member and extending the length thereof in spaced relation with the inner wall of said member, a second, rigid, hollow, axial sleeve on the rear wall of said chamber and extending inwardly of said chamber and between said inner wall of said member and said first hollow sleeve, guide means carried by said inner wall of said member and the outer wall of said first sleeve, said guide means engaging the outer and inner walls, respectively, of said second sleeve throughout the excursion of said movable wall within said chamber.
Claim 3
Dependent Claim
111 words
A brake actuating chamber having a first diaphragm dividing said chamber, a second diaphragm dividing said chamber in spaced relation with said first diaphragm, a first fluid pressure inlet positioned to deliver fluid Pressure between said diaphragms, a second fluid pressure inlet positioned to deliver fluid pressure to the side of said second diaphragm opposite the side thereof opposed to said first diaphragm, and flexible valve seal means carried by said second diaphragm and positioned to seal said second inlet against the flow of fluid pressure from said first to said second inlet while permitting the flow of fluid pressure from said second inlet to said surface of said second diaphragm.
Claim 4
Dependent Claim
111 words
A brake actuating chamber having a first diaphragm dividing said chamber, a second diaphragm dividing said chamber in spaced relation with said first diaphragm, a first fluid pressure inlet positioned to deliver fluid Pressure between said diaphragms, a second fluid pressure inlet positioned to deliver fluid pressure to the side of said second diaphragm opposite the side thereof opposed to said first diaphragm, and flexible valve seal means carried by said second diaphragm and positioned to seal said second inlet against the flow of fluid pressure from said first to said second inlet while permitting the flow of fluid pressure from said second inlet to said surface of said second diaphragm.
Claim 5
Dependent Claim
103 words
In a spring-applied, pressure-released fluid pressure chamber, a movable wall dividing said chamber, axial extensions fixed on said wall and extending forwardly and rearwardly therefrom, said forward extension penetrating the forward wall of said chamber in sliding, guided contact relationship therewith, an inwardly extending sleeve fixed on the rear wall of said chamber, said rearward extension penetrating said sleeve and having its rearmost segment in sliding guided contact relationship therewith, said movable wall being out of contact with said chamber except for said guiding contact of said extensions, and a flexible sleeve having its opposite ends secured to said chamber and said wall.
Claim 6
Dependent Claim
103 words
In a spring-applied, pressure-released fluid pressure chamber, a movable wall dividing said chamber, axial extensions fixed on said wall and extending forwardly and rearwardly therefrom, said forward extension penetrating the forward wall of said chamber in sliding, guided contact relationship therewith, an inwardly extending sleeve fixed on the rear wall of said chamber, said rearward extension penetrating said sleeve and having its rearmost segment in sliding guided contact relationship therewith, said movable wall being out of contact with said chamber except for said guiding contact of said extensions, and a flexible sleeve having its opposite ends secured to said chamber and said wall.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |