US3813992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual fluid pressure motor
Assignee: MIDBRAKE Corp
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Filing: 1972-03-29
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Granted: 1974-06-04
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Expires: 1992-03-29
Abstract
Abstract A fluid pressure motor power brake mechanism employing two power systems each under the control of separate valve means to apply the resultant power force of both power brake systems to a hydraulic system for actuating the brakes at the wheels of a vehicle in such a manner that disabling of one or the other of the power brake systems leaves the remaining power brake system to apply power braking force to the hydraulic braking system associated with the wheels of a vehicle.
Inventors
- 👤 C Leroy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:30
CPC Classifications
B; B60; B60T; B60T13/00; B60T13/10; B60T13/24; B60T13/46; B60T13/52; B60T13/563
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
185 words
In a fluid pressure motor mechanism having first and second housing sections, said first housing section including a first power wall responsive to differential pressure to move from a released to an applied position, a first source of differential pressure fluid, manually movable control means for regulating application of differential pressure to said first power wall, an output member, reaction means operatively connected to said output member, said first power wall and said control means for movement of said output member in response to movement of said first power wall and said control means, said second housing section including a second power wall, a second source of differential pressure separate from said first source, additional control means responsive to movement of said first output member to regulate application of differential pressure to said second wall, an additional output member, and additional reaction means operatively connected to said additional output mEmber, said second power wall and said additional control means for movement of said additional output member in response to movement of said second power wall and said second control means for producing an output force.
Claim 2
Dependent Claim
185 words
In a fluid pressure motor mechanism having first and second housing sections, said first housing section including a first power wall responsive to differential pressure to move from a released to an applied position, a first source of differential pressure fluid, manually movable control means for regulating application of differential pressure to said first power wall, an output member, reaction means operatively connected to said output member, said first power wall and said control means for movement of said output member in response to movement of said first power wall and said control means, said second housing section including a second power wall, a second source of differential pressure separate from said first source, additional control means responsive to movement of said first output member to regulate application of differential pressure to said second wall, an additional output member, and additional reaction means operatively connected to said additional output mEmber, said second power wall and said additional control means for movement of said additional output member in response to movement of said second power wall and said second control means for producing an output force.
Claim 3
Dependent Claim
41 words
A fluid pressure motor mechanism in accordance with claim 1 in which one of said control means is responsive in the absence of differential pressure in the associated one of said sources to move the associated one of said output members.
Claim 4
Dependent Claim
37 words
A fluid pressure motor mechanism as set forth in claim 1 in which said manually movable control means is operative in the absence of differential fluid pressure from said first source to move said additional control means.
Claim 5
Dependent Claim
36 words
A fluid pressure motor mechanism as set forth in claim 1 in which said additional control means is operative in the absence of differential fluid pressure from said second source to move said additional output member.
Claim 6
Dependent Claim
168 words
In a power brake unit having first and second fluid tight housings; separate sources of pressure for each of said housings; first and second pressure responsive movable walls in said first and second housing portions, respectively, and forming therewith chambers on opposite sides of each of said walls; first and second control means associated with said first and second wall means, respectively, and controlling the pressure differential acting on said walls; first and second output members; a first reaction means operatively connected to said first wall, said first control means and said first output member and being responsive to movement of said first wall and said first control means to move said first output member, a second reaction means operatively connected to said second wall, said second control means and said second output member to move said second output member in response to movement of said second power wall and said second control means; and an actuating member connected to said first control means to move the latter.
Claim 7
Dependent Claim
168 words
In a power brake unit having first and second fluid tight housings; separate sources of pressure for each of said housings; first and second pressure responsive movable walls in said first and second housing portions, respectively, and forming therewith chambers on opposite sides of each of said walls; first and second control means associated with said first and second wall means, respectively, and controlling the pressure differential acting on said walls; first and second output members; a first reaction means operatively connected to said first wall, said first control means and said first output member and being responsive to movement of said first wall and said first control means to move said first output member, a second reaction means operatively connected to said second wall, said second control means and said second output member to move said second output member in response to movement of said second power wall and said second control means; and an actuating member connected to said first control means to move the latter.
Claim 8
Dependent Claim
32 words
The combination set forth in claim 5 in which said first and second reaction means each include lever elements engageable with the associated one of said walls, control means and output members.
Claim 9
Dependent Claim
27 words
The combination set forth in claim 5 in which said walls are movable independently of each other in response to separate sources of fluid pressure acting thereon.
Claim 10
Dependent Claim
38 words
The combination set forth in claim 5 in which one of said control means is responsive in the absence of differential pressure in the associated one of said sources to move the associated one of said output members.
Claim 11
Dependent Claim
31 words
The combination set forth in claim 5 in which said actuating member is operative in the absence of differential fluid pressure from said first source to move said second control means.
Claim 12
Dependent Claim
32 words
The combination set forth in claim 5, in which said second control means is operative in the absence of differential fluid pressure from said second source to move said second output member.
Claim 13
Dependent Claim
152 words
In a fluid pressure motor mechanism having first and second motor means, each of said motor means having a housing, a pressure responsive movable wall in said housing, a source of fluid pressure, a control means carried by said wall and being movable relative thereto for controlling the application of fluid pressure from said source to said wall, an output member movable in response to movement of said wall, said wall and output member associated with one of said motor means being movable independently of said wall and output member associated with the other of said motor means, and actuating means for moving said control means for effecting movement of said output members of said first and second motor means, said output members of said first and second motor means being movable by said walls upon movement of said actuating means in the absence of fluid pressure in one of said sources.
Claim 14
Dependent Claim
152 words
In a fluid pressure motor mechanism having first and second motor means, each of said motor means having a housing, a pressure responsive movable wall in said housing, a source of fluid pressure, a control means carried by said wall and being movable relative thereto for controlling the application of fluid pressure from said source to said wall, an output member movable in response to movement of said wall, said wall and output member associated with one of said motor means being movable independently of said wall and output member associated with the other of said motor means, and actuating means for moving said control means for effecting movement of said output members of said first and second motor means, said output members of said first and second motor means being movable by said walls upon movement of said actuating means in the absence of fluid pressure in one of said sources.
Claim 15
Dependent Claim
159 words
In a fluid pressure motor mechanism having a pair of adjacent housing portions, a pair of fluid pressure responsive movable walls in each of said housing portions, resPectively, a separate source of fluid pressure for each of said housing portions, a pair of control valve means separately connected to each of said sources for controlling fluid pressure to each of said housing portions, respectively, an input member movably supported relative to one of said housing portions, an output means movably supported relative to the other of said housing portions, connecting means operatively connecting said input member to both of said control valve means for actuating the latter to apply differential fluid pressure to both of said walls and operatively connecting said output means to said walls for movement of said output means in response to movement of either of said walls, said walls being movable independently of each other in response to separate sources of fluid pressure acting thereon.
Claim 16
Dependent Claim
159 words
In a fluid pressure motor mechanism having a pair of adjacent housing portions, a pair of fluid pressure responsive movable walls in each of said housing portions, resPectively, a separate source of fluid pressure for each of said housing portions, a pair of control valve means separately connected to each of said sources for controlling fluid pressure to each of said housing portions, respectively, an input member movably supported relative to one of said housing portions, an output means movably supported relative to the other of said housing portions, connecting means operatively connecting said input member to both of said control valve means for actuating the latter to apply differential fluid pressure to both of said walls and operatively connecting said output means to said walls for movement of said output means in response to movement of either of said walls, said walls being movable independently of each other in response to separate sources of fluid pressure acting thereon.
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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) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |