Patent US3465389A successfully refreshed from Google Patents.
Patent US3216532A successfully refreshed from Google Patents.
US3216532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Series energized brake
Assignee: Motors Liquidation Co
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Filing: 1964-01-23
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Granted: 1965-11-09
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Expires: 1984-01-23
Abstract
No abstract record available.
Inventors
- 👤 Anton F Erickson
- 👤 Robert M Van House
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:00
CPC Classifications
F; F16; F16D; F16D51/00; F16D51/46; F16D51/66; F16D51/48; F16D51/52; F16D2121/00; F16D2121/02; F16D2121/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
A BRAKING MECHANISM FOR A VEHICLE HAVING A ROTATING DRUM, SAID BRAKING MECHANISM COMPRISING; FLUID OPERABLE MEANS CARRIED IN JUXTAPOSED TO THE ROTATING DRUM ON A FIXED PORTION OF THE VEHICLE, FIRST LEVER MEANS OPERATIVELY ASSOCIATED WITH SAID FLUID OPERABLE MEANS AND BEING DISPOSED FOR SLIDING MOVEMENT TOWARDS THE ROTATING DRUM, SAID FIRST LEVER MEANS HAVING A FRICTIONAL SURFACE ADAPTED TO ENGAGE THE ROTATING DRUM THEREBY PIVOTING THE FIRST LEVER MEANS IN THE DIRECTION OF DRUM ROTATION, SECOND LEVER MEANS SLIDABLY CARRIED BY SAID FIRST LEVER MEANS AND ADAPTED TO BE PIVOTED THEREBY, AND A PLURALITY OF FRICTIONAL MEMBERS DISPOSED IN CLOSE PROXIMITY TO THE ROTATING DRUM AND BEING ADAPTED TO BE DRIVEN INTO ENGAGEMENT WITH THE ROTATING DRUM BY SAID SECOND LEVER MEANS AND GENERATING A SERVO ACTION THEREBY, SAID FIRST LEVER MEANS AND SAID SECOND LEVER MEANS COOPERATING TO PROVIDE A FORCE MULTIPLICATION OF A FORCE FROM SAID FLUID OPERABLE MEANS AS THE FRICTIONAL MEMBERS MOVE INTO ENGAGEMENT WITH THE ROTATING DRUM.
Claim 2
Dependent Claim
164 words
A BRAKING MECHANISM FOR A VEHICLE HAVING A ROTATING DRUM, SAID BRAKING MECHANISM COMPRISING; FLUID OPERABLE MEANS CARRIED IN JUXTAPOSED TO THE ROTATING DRUM ON A FIXED PORTION OF THE VEHICLE, FIRST LEVER MEANS OPERATIVELY ASSOCIATED WITH SAID FLUID OPERABLE MEANS AND BEING DISPOSED FOR SLIDING MOVEMENT TOWARDS THE ROTATING DRUM, SAID FIRST LEVER MEANS HAVING A FRICTIONAL SURFACE ADAPTED TO ENGAGE THE ROTATING DRUM THEREBY PIVOTING THE FIRST LEVER MEANS IN THE DIRECTION OF DRUM ROTATION, SECOND LEVER MEANS SLIDABLY CARRIED BY SAID FIRST LEVER MEANS AND ADAPTED TO BE PIVOTED THEREBY, AND A PLURALITY OF FRICTIONAL MEMBERS DISPOSED IN CLOSE PROXIMITY TO THE ROTATING DRUM AND BEING ADAPTED TO BE DRIVEN INTO ENGAGEMENT WITH THE ROTATING DRUM BY SAID SECOND LEVER MEANS AND GENERATING A SERVO ACTION THEREBY, SAID FIRST LEVER MEANS AND SAID SECOND LEVER MEANS COOPERATING TO PROVIDE A FORCE MULTIPLICATION OF A FORCE FROM SAID FLUID OPERABLE MEANS AS THE FRICTIONAL MEMBERS MOVE INTO ENGAGEMENT WITH THE ROTATING DRUM.
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) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |