US3765172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for controlling operation of fluid-pressure operated boosters
Assignee: Girling Ltd
•
Filing: 1972-02-11
•
Granted: 1973-10-16
•
Expires: 1992-02-11
Abstract
Abstract Means for controlling operation of a fluid-pressure operated booster for a braking system comprising an electrically operated actuator valve energised by the output from an electronic control module. The control module compares signals from first and second force sensitive means adapted to sense respectively forces acting at any one time on an input member acting on a movable wall of the booster and on an output member on which the movable wall acts to augment a force applied to the input member.
Inventors
- 👤 H Fineman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:32
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/321; B60T8/3255; B60T8/326; B60T8/3265; B60T13/00; B60T13/10; B60T13/66; B60T13/72; B60T8/34; B60T8/44; B60T8/447; B60T8/448
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
136 words
A fluid-pressure operated booster for use in a braking system comprising a housing, a movable wall in said housing, means for applying differential fluid pressures across said movable wall, an input member connected to said movable wall, an output member connected to said movable wall, a first force sensitive means sensing a force applied to said input member, a second force sensitive means for sensing a force induced in said output member, an electronic control module adapted to compare signals received from said first and second force sensitive means and adapted to emit an output signal, and an electrically-operated actuator valve energised in response to said output signal to establish a pressure differential across said wall and to vary the said pressure differential in accordance with variations in said forces sensed by said force sensitive means.
Claim 2
Dependent Claim
136 words
A fluid-pressure operated booster for use in a braking system comprising a housing, a movable wall in said housing, means for applying differential fluid pressures across said movable wall, an input member connected to said movable wall, an output member connected to said movable wall, a first force sensitive means sensing a force applied to said input member, a second force sensitive means for sensing a force induced in said output member, an electronic control module adapted to compare signals received from said first and second force sensitive means and adapted to emit an output signal, and an electrically-operated actuator valve energised in response to said output signal to establish a pressure differential across said wall and to vary the said pressure differential in accordance with variations in said forces sensed by said force sensitive means.
Claim 3
Dependent Claim
26 words
Means as claimed in claim 1, wherein said actuator valve is energised to operate said booster when the difference between said signals exceeds a predetermined value.
Claim 4
Dependent Claim
44 words
Means as claimed in claim 1, wherein each force sensitive means comprises at least one load cell having an electrical resistance characteristic which is adapted to change in response to a mechanical load applied to said member with which that load cell is associated.
Claim 5
Dependent Claim
31 words
Means as claimed in claim 1, wherein said electronic control module is adapted to compare the relative changes in the electrical resistance characteristics of said first and second force sensitive means.
Claim 6
Dependent Claim
34 words
Means as claimed in claim 4, wherein said electronic control module is adapted to switch out a neutral (in balance) potential to a positive or negative potential to energise said electrically operated actuator valve.
Claim 7
Dependent Claim
25 words
Means as claimed in claim 4, wherein said electronic control module is adapted to emit an A.C. output to energise said electrically operated actuator valve.
Claim 8
Dependent Claim
38 words
Means as claimed in claim 1, in which said electronic control module is adapted to establish electronically between said first and second force sensitive means, a ratio at which the electronic control module will energise said actuator valve.
Claim 9
Dependent Claim
29 words
Means as claimed in claim 1, wherein said electronic control module is adapted to maintain limits within which said actuator valve will not be energised by said control module.
Claim 10
Dependent Claim
22 words
A fluid-pressure operated booster as claimed in claim 1, incorporating an hydraulic master cylinder adapted to be actuated by said output member.
Claim 11
Dependent Claim
23 words
A fluid-pressure operated booster as claimed in claim 1, wherein each force sensitive means comprises a load-conscious sensing device located on said member.
References Cited (Backward Citations)
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Cited
US2865337A
Cited
US2964059A
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US3106873A
Cited
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Cited
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Cited
US3568572A
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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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |