US3128846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
figures
Assignee: —
•
Filing: —
•
Granted: 1964-04-14
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Expires: 1981-04-14
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:13
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/14; F16D65/16; F16D65/22; B; B60; B60T; B60T8/00; B60T8/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
IN A BRAKE DEVICE FOR A VEHICLE WHEEL HAVING BRAKE SHOES, A BRAKE CYLINDER HAVING A PLUNGER THEREIN MOVABLE TO TRANSMIT FORCE TO THE BRAKE SHOES TO APPLY THE BRAKES, SAID BRAKE CYLINDER HAVING A FLUID CHAMBER THEREIN OF WHICH SAID PLUNGER FORMS ONE WALL, MEANS COMPRISING A FLUID INLET FOR SUPPLYING FLUID UNDER PRESSURE TO SAID CHAMBER TO EFFECT MOVEMENT OF SAID PLUNGER, MEANS OPERATIVE WHEN THE BRAKE DEVELOPS A PREDETERMINED TORQUE FOR CLOSING COMMUNICATION BETWEEN SAID INLET AND SAID CHAMBER, A PRESSURE RESPONSIVE MEMBER EXPOSED TO SAID INLET AND MOVABLE TO INCREASE PRESSURE IN SAID CHAMBER AND HAVING MEANS FOR RESISTING SUCH MOVEMENT WHEREBY, WHEN COMMUNICATION IS CLOSED BETWEEN SAID INLET AND SAID CHAMBER, SAID PRESSURE RESPONSIVE MEMBER WILL BE MOVED AGAINST ITS RESISTING MEANS BY PRESSURE IN SAID INLET TO INCREASE PRESSURE IN SAID CHAMBER, BUT AT A RATE LOWER THAN THE RATE OF INCREASE IN PRESSURE IN SAID INLET.
Claim 2
Dependent Claim
153 words
IN A BRAKE DEVICE FOR A VEHICLE WHEEL HAVING BRAKE SHOES, A BRAKE CYLINDER HAVING A PLUNGER THEREIN MOVABLE TO TRANSMIT FORCE TO THE BRAKE SHOES TO APPLY THE BRAKES, SAID BRAKE CYLINDER HAVING A FLUID CHAMBER THEREIN OF WHICH SAID PLUNGER FORMS ONE WALL, MEANS COMPRISING A FLUID INLET FOR SUPPLYING FLUID UNDER PRESSURE TO SAID CHAMBER TO EFFECT MOVEMENT OF SAID PLUNGER, MEANS OPERATIVE WHEN THE BRAKE DEVELOPS A PREDETERMINED TORQUE FOR CLOSING COMMUNICATION BETWEEN SAID INLET AND SAID CHAMBER, A PRESSURE RESPONSIVE MEMBER EXPOSED TO SAID INLET AND MOVABLE TO INCREASE PRESSURE IN SAID CHAMBER AND HAVING MEANS FOR RESISTING SUCH MOVEMENT WHEREBY, WHEN COMMUNICATION IS CLOSED BETWEEN SAID INLET AND SAID CHAMBER, SAID PRESSURE RESPONSIVE MEMBER WILL BE MOVED AGAINST ITS RESISTING MEANS BY PRESSURE IN SAID INLET TO INCREASE PRESSURE IN SAID CHAMBER, BUT AT A RATE LOWER THAN THE RATE OF INCREASE IN PRESSURE IN SAID INLET.
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) | 1967-04-14 | 1967-10-14 | 1968-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-14 | 1971-10-14 | 1972-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-14 | 1975-10-14 | 1976-04-14 | $7700.00 | Window Closed / Lapsed |