US3592304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid delivery control system
Assignee: Motors Liquidation Co
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Filing: 1969-04-03
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Granted: 1971-07-13
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Expires: 1989-04-03
Abstract
Abstract A fluid delivery control system is disclosed as controlling the delivery of coolant from a coolant pump to the output brake of a tracklaying vehicle. The control system according to the preferred embodiment has a pilot valve operated by the brake''s apply linkage to control the operation of a fluid motor. The motor effects positive action of a check valve in the coolant pump''s suction line to air bleed the pump to prevent coolant delivery to the brake during brake disengagement. The check valve is spring biased to connect the coolant pump''s suction line to the pump''s reservoir during brake engagement.
Inventors
- 👤 Charles H Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:14
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/78; F16D65/84; F16D65/853; F16D2065/783
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
186 words
In a coolant delivery control system for controlling coolant delivery to a brake the combination of a coolant reservoir, a pump having a suction line and a discharge line, said discharge line connected to deliver pump discharge to a brake, check valve means for connecting said suction line to atmosphere while closing said suction line to said reservoir when in a vent position and for connecting said reservoir to said suction line while closing said suction line to atmosphere when in a coolant delivery position, said check valve means including biasing means for biasing said check valve means to said coolant delivery position, brake linkage operable to engage and disengage said brake, and check valve control means operatively connected to said brake linkage and said check valve means and controlled by said brake linkage for positively conditioning and holding said check valve means in said vent position when said brake linkage is operated to disengage said brake and for permitting said check valve biasing means to condition said check valve means in said coolant delivery position when said brake linkage is operated to engage said brake.
Claim 2
Dependent Claim
186 words
In a coolant delivery control system for controlling coolant delivery to a brake the combination of a coolant reservoir, a pump having a suction line and a discharge line, said discharge line connected to deliver pump discharge to a brake, check valve means for connecting said suction line to atmosphere while closing said suction line to said reservoir when in a vent position and for connecting said reservoir to said suction line while closing said suction line to atmosphere when in a coolant delivery position, said check valve means including biasing means for biasing said check valve means to said coolant delivery position, brake linkage operable to engage and disengage said brake, and check valve control means operatively connected to said brake linkage and said check valve means and controlled by said brake linkage for positively conditioning and holding said check valve means in said vent position when said brake linkage is operated to disengage said brake and for permitting said check valve biasing means to condition said check valve means in said coolant delivery position when said brake linkage is operated to engage said brake.
Claim 3
Dependent Claim
184 words
The coolant delivery control system described in claim 1 and said check valve control means comprising fluid motor means operatively connected to said check valve means for conditioning and holding said check valve means in said vent position when supplied with fluid pressure and for permitting said check valve biasing means to condition said check valve means in said coolant delivery position when the fluid pressure is exhausted, brake signal valve means for delivering fluid pressure to said motor means for delivering fluid pressure to said motor means while closing said motor means to an exhaust when in a brake-disengaged signal position and for discontinuing fluid pressure delivery to said motor means while opening said motor means to said exhaust when in a brake-engaged signal position, said brake linkage and said brake signal valve means having cooperating means for conditioning said brake signal valve means in said Brake-disengaged signal position when said brake linkage is operated to disengage said brake and for conditioning said brake signal valve means in said brake engaged signal position when said brake linkage is operated to engage said brake.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |