Patent US4070070A successfully refreshed from Google Patents.
US4070070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle wheel speed retarding system
Assignee: Individual
•
Filing: 1976-08-06
•
Granted: 1978-01-24
•
Expires: 1996-08-06
Abstract
Abstract A vehicle wheel speed retarding system comprising a positive displacement fluid pump in a liquid system adapted to be driven by positive engagement with means on the wheel drive. The output of the pump is delivered to a valve and governor means also driven by the vehicle wheel drive operates the valve to reduce its flow capacity with increase in speed, thus retarding the positive displacement pump and, hence, the vehicle wheel. Manually regulated means, such as controlled air pressure acting against a diaphragm, resists movement of the valve to control the speed capacity of the device. Failure of air pressure will result in minimum speed capacity.
Inventors
- 👤 Frederick S. Eggers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:20
CPC Classifications
B; B60; B60K; B60K31/00; B60T; B60T1/00; B60T1/02; B60T1/08; B60T8/00; B60T8/32; B60T8/72; B60T8/74; F; F16; F16D; F16D57/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
169 words
A vehicle wheel speed retarder system comprising; a positive displacement fluid pump; a liquid reservoir-connected to said pump; a positive drive means for said pump, with the driving element thereof adapted to be mounted on, and to rotate with, the wheel drive of a vehicle; a valve housing having a flow passageway therethrough; duct means connecting the output of said pump to said flow passageway; a valve member moveable in said housing from a full open through progressively more restrictive positions; a speed-responsive device adapted to be driven by said vehicle wheel drive and conditioned to move said valve member through said more restrictive positions in response to increases in vehicle wheel speed; and manually adjustable means resisting said movement of the valve member comprising: a casing; a pressure-responsive member sealed across said casing; means on said pressure-responsive member engaging said valve member to bias it towards said open position; a source of pressure fluid; and conduit means for directing fluid from said source to bias said pressure-responsive member.
Claim 2
Dependent Claim
169 words
A vehicle wheel speed retarder system comprising; a positive displacement fluid pump; a liquid reservoir-connected to said pump; a positive drive means for said pump, with the driving element thereof adapted to be mounted on, and to rotate with, the wheel drive of a vehicle; a valve housing having a flow passageway therethrough; duct means connecting the output of said pump to said flow passageway; a valve member moveable in said housing from a full open through progressively more restrictive positions; a speed-responsive device adapted to be driven by said vehicle wheel drive and conditioned to move said valve member through said more restrictive positions in response to increases in vehicle wheel speed; and manually adjustable means resisting said movement of the valve member comprising: a casing; a pressure-responsive member sealed across said casing; means on said pressure-responsive member engaging said valve member to bias it towards said open position; a source of pressure fluid; and conduit means for directing fluid from said source to bias said pressure-responsive member.
Claim 3
Dependent Claim
38 words
The wheel speed retarder defined by claim 1 wherein said pressure fluid is a pressurized gas and including; a pressure regulator in said conduit means; and manually adjustable means for regulating the outlet pressure of said pressure regulator.
Claim 4
Dependent Claim
15 words
The wheel speed retarder defined by claim 1 wherein; said pressure-responsive member is a diaphragm.
Claim 5
Dependent Claim
42 words
The wheel speed retarder defined by claim 1 wherein said speed-responsive device comprises: a centrifugal governor adapted to be driven by said vehicle wheel drive; and having flyweights on arms pivoted thereon; and means on said arms for moving said valve member.
Claim 6
Dependent Claim
41 words
The wheel speed retarder defined by claim 1 wherein; said valve member is a spool slidable axially in a cylindrical bore. said spool being engaged at one end by said weighted arm and at the other end by said pressure-responsive member.
References Cited (Backward Citations)
US1529886A
Cited
US2179540A
Cited
US2373138A
Cited
US2364853A
Cited
US2535097A
Cited
US3822770A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-23 | 1981-07-25 | 1982-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-23 | 1985-07-25 | 1986-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-23 | 1989-07-25 | 1990-01-24 | $7700.00 | Window Closed / Lapsed |