Patent US3574413A successfully refreshed from Google Patents.
US3574413A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brake system for vehicles
Assignee: Individual
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Filing: 1963-04-29
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Granted: 1971-04-13
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Expires: 1983-04-29
Abstract
Abstract A dual reservoir airbrake system wherein both a main fluid pressure system and an auxiliary fluid pressure system can supply pressure to a first and second movable wall motor. The disclosure particularly relates to brake systems where valve-protected reservoir pressure supplant each other to produce from such a motor push rod pressure when the main or auxiliary brake pressure system becomes disabled failing temporarily or completely.
Inventors
- 👤 Arthur B Euga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:07
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/14; F16D65/16; F16D65/22; B; B60; B60T; B60T11/00; B60T11/10; B60T13/00; B60T13/10; B60T13/24; B60T13/26; B60T13/36; B60T13/40; B60T13/403; B60T13/58; B60T13/74; B60T13/745; B60T17/00; B60T17/08; B60T17/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
224 words
A brake system for vehicles comprising reservoir means including a service brake reservoir for supplying pressurized service fluid to a brake motor and an auxiliary brake reservoir for supplying pressurized auxiliary fluid to said brake motor; a tractor brake motor including a casing, a first moveable wall forming a portion of the confines of a tractor service brake chamber, a second moveable wall forming the confines of a tractor auxiliary brake chamber, and a push rod operated by said moveable walls; valve means including a service valve for releasing service fluid to said service chamber and an auxiliary valve for releasing auxiliary fluid to said auxiliary chamber, a manual actuator for said service valve means; a manual actuator for said auxiliary valve means; a trailer brake motor including a first moveable wall forming a portion of the confines of a trailer service brake chamber, a second moveable wall forming the confines toward trailer auxiliary brake chamber, and a push rod operated by said moveable walls; relay emergency valve means for controlling the flow of pressurized fluid to said trailer service brake chamber; conduit means connecting said trailer auxiliary brake chamber with said reservoir means; and limiting valve means for proportionally decreasing the air pressure applied to the tractor brake motor as compared to the trailer brake motor when said auxiliary brake chambers are energized.
Claim 2
Dependent Claim
224 words
A brake system for vehicles comprising reservoir means including a service brake reservoir for supplying pressurized service fluid to a brake motor and an auxiliary brake reservoir for supplying pressurized auxiliary fluid to said brake motor; a tractor brake motor including a casing, a first moveable wall forming a portion of the confines of a tractor service brake chamber, a second moveable wall forming the confines of a tractor auxiliary brake chamber, and a push rod operated by said moveable walls; valve means including a service valve for releasing service fluid to said service chamber and an auxiliary valve for releasing auxiliary fluid to said auxiliary chamber, a manual actuator for said service valve means; a manual actuator for said auxiliary valve means; a trailer brake motor including a first moveable wall forming a portion of the confines of a trailer service brake chamber, a second moveable wall forming the confines toward trailer auxiliary brake chamber, and a push rod operated by said moveable walls; relay emergency valve means for controlling the flow of pressurized fluid to said trailer service brake chamber; conduit means connecting said trailer auxiliary brake chamber with said reservoir means; and limiting valve means for proportionally decreasing the air pressure applied to the tractor brake motor as compared to the trailer brake motor when said auxiliary brake chambers are energized.
Claim 3
Dependent Claim
178 words
A brake system for vehicles comprising reservoir means including a service brake reservoir for supplying pressurized service fluid to a brake motor and an auxiliary brake reservoir for supplying pressurized auxiliary fluid to said brake motor; a tractor brake motor including a casing, a first moveable wall forming a portion of the confines of a tractor service brake chamber, a second moveable wall forming the confines of a tractor auxiliary brake chamber, and a push rod operated by said moveable walls; valve means including a service valve for releasing service fluid to said service chamber and an auxiliary valve for releasing auxiliary fluid to said auxiliary chamber, a manual actuator for said auxiliary valve means; a trailer brake motor; a relay emergency valve means for controlling the flow of pressurized fluid to said trailer brake motor; conduit means connecting said reservoir means with said relay emergency valve means; and limiting valve means for proportionally decreasing the air pressure applied to the tractor brake motor as compared to the trailer brake motor when said auxiliary brake chambers are energized.
Claim 4
Dependent Claim
178 words
A brake system for vehicles comprising reservoir means including a service brake reservoir for supplying pressurized service fluid to a brake motor and an auxiliary brake reservoir for supplying pressurized auxiliary fluid to said brake motor; a tractor brake motor including a casing, a first moveable wall forming a portion of the confines of a tractor service brake chamber, a second moveable wall forming the confines of a tractor auxiliary brake chamber, and a push rod operated by said moveable walls; valve means including a service valve for releasing service fluid to said service chamber and an auxiliary valve for releasing auxiliary fluid to said auxiliary chamber, a manual actuator for said auxiliary valve means; a trailer brake motor; a relay emergency valve means for controlling the flow of pressurized fluid to said trailer brake motor; conduit means connecting said reservoir means with said relay emergency valve means; and limiting valve means for proportionally decreasing the air pressure applied to the tractor brake motor as compared to the trailer brake motor when said auxiliary brake chambers are energized.
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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) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |