Patent US3891280A successfully refreshed from Google Patents.
US3891280A
Expired / Lapsed
US
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Device responsive to vehicle loading with signal generating means for brake actuation
Assignee: Haldex AB
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Filing: 1972-11-28
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Granted: 1975-06-24
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Expires: 1992-11-28
Abstract
Abstract A force transmitting device for automotive vehicle use has a piston movable under force such as weight appearing between two vehicle parts. A plastic deformable body within the piston communicates with a rod biased by an adjustable spring to transmit movement as a function of the force. Coupled to the rod is a valve which controls a supply of compressed air for example, that can be released whenever the vehicle load exceeds a predetermined value.
Inventors
- 👤 Lars Mattis Severinsson
- 👤 Gert Artur Persson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:53
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/18; B60T8/1837; B60T8/1856; G; G01; G01G; G01G19/00; G01G19/08; G01G19/10; G01L; G01L1/00; G01L1/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
187 words
A device for transmitting a signal in response to an actuating force acting on the device such as weight of an object, comprising in combination, a housing, a piston movable in said housing, means transmitting said force to bear upon said housing and said piston to tend to move said piston in said housing as a function of the force, an enclosed plastic deformable body movable by said piston, a rod contacting said body to produce a movement thereby with said piston which is a function of said force, spring threshold means biasing said rod against said movement until said force exceeds a predetermined value overcoming the spring bias, and signal generating means actuated by movement of said rod, wherein said signal generating means comprises means supplying compressed air into a signal passageway for said compresseD air in response to a valve member movable by said rod upon a movement of said piston by said actuating force, wherein said signal passageway includes a pressure chamber, and means controlled by movement of said rod to decrease pressure in said chamber when said force is at a predetermined value.
Claim 2
Independent Claim
187 words
A device for transmitting a signal in response to an actuating force acting on the device such as weight of an object, comprising in combination, a housing, a piston movable in said housing, means transmitting said force to bear upon said housing and said piston to tend to move said piston in said housing as a function of the force, an enclosed plastic deformable body movable by said piston, a rod contacting said body to produce a movement thereby with said piston which is a function of said force, spring threshold means biasing said rod against said movement until said force exceeds a predetermined value overcoming the spring bias, and signal generating means actuated by movement of said rod, wherein said signal generating means comprises means supplying compressed air into a signal passageway for said compresseD air in response to a valve member movable by said rod upon a movement of said piston by said actuating force, wherein said signal passageway includes a pressure chamber, and means controlled by movement of said rod to decrease pressure in said chamber when said force is at a predetermined value.
Claim 3
Dependent Claim
47 words
A device as defined in claim 1, wherein the valve member comprises a member axially movable by said rod to two positions, in one of which said air is released into said signal passageway and in the other of which the pressure in said chamber is decreased.
References Cited (Backward Citations)
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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) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |