Patent US3175649A successfully refreshed from Google Patents.
US3175649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trailer brake actuator
Assignee: Atwood Vacuum Machine Co
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Filing: 1961-10-30
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Granted: 1965-03-30
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Expires: 1981-10-30
Abstract
No abstract record available.
Inventors
- 👤 Joseph R Kirk
- 👤 Adiel Y Dodge
- 👤 Edwin L Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:16
CPC Classifications
F; F16; F16D; F16D51/00; F16D51/16; F16D51/18; B; B60; B60T; B60T11/00; B60T11/10; B60T11/107; F16D51/46; F16D51/48; F16D51/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A DEVICE OF THE CLASS DESCRIBED COMPRISING A COUPLER MEMBER ATTACHED TO A BRAKE EQUIPPED TOWING VEHICLE, A DRAFT MEMBER ATTACHED TO A HYDRAULIC BRAKE EQUIPPED TRAILER VEHICLE THE BRAKES OF WHICH ARE OPERABLE INDEPENDENTLY OF THE BRAKES ON THE TOWING VEHICLE, MEANS INCLUDING OSCILLATABLE LINKS PIVOTALLY CONNECTED AT THEIR OPPOSITE ENDS OF SAID COUPLER AND DRAFT MEMBERS PROVIDING A LOST MOTION DRAFT CONNECTION BETWEEN SAID MEMBERS PERMITTING FORWARD MOVEMENT OF THE DRAFT MEMBER RELATIVE TO THE COUPLER MEMBER, ONE OF SAID LINKS HAVING AN EXTENSION, AND A TRAILER BRAKE OPERATOR OPERATIVELY CONNECTED WITH SAID EXTENSIONS, WHEREBY IT IS OPERATED WITH LESS THAN ONE TO ONE MECHANICAL ADVANTAGE IN RESPONSE TO RELATIVE ENDWISE MOTION BETWEEN SAID MEMBERS INCIDENT TO APPLICATION OF THE BRAKES ON THE TOWING VEHICLE, SAID BRAKE OPERATOR BEING CONNECTED TO THE TRAILER BRAKES TO OPERATE THE SAME ACCORDINGLY WITH SOFTENED BRAKING ACTION.
Claim 2
Independent Claim
145 words
A DEVICE OF THE CLASS DESCRIBED COMPRISING A COUPLER MEMBER ATTACHED TO A BRAKE EQUIPPED TOWING VEHICLE, A DRAFT MEMBER ATTACHED TO A HYDRAULIC BRAKE EQUIPPED TRAILER VEHICLE THE BRAKES OF WHICH ARE OPERABLE INDEPENDENTLY OF THE BRAKES ON THE TOWING VEHICLE, MEANS INCLUDING OSCILLATABLE LINKS PIVOTALLY CONNECTED AT THEIR OPPOSITE ENDS OF SAID COUPLER AND DRAFT MEMBERS PROVIDING A LOST MOTION DRAFT CONNECTION BETWEEN SAID MEMBERS PERMITTING FORWARD MOVEMENT OF THE DRAFT MEMBER RELATIVE TO THE COUPLER MEMBER, ONE OF SAID LINKS HAVING AN EXTENSION, AND A TRAILER BRAKE OPERATOR OPERATIVELY CONNECTED WITH SAID EXTENSIONS, WHEREBY IT IS OPERATED WITH LESS THAN ONE TO ONE MECHANICAL ADVANTAGE IN RESPONSE TO RELATIVE ENDWISE MOTION BETWEEN SAID MEMBERS INCIDENT TO APPLICATION OF THE BRAKES ON THE TOWING VEHICLE, SAID BRAKE OPERATOR BEING CONNECTED TO THE TRAILER BRAKES TO OPERATE THE SAME ACCORDINGLY WITH SOFTENED BRAKING ACTION.
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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) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |