US3335825A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brake mechanism
Assignee: Individual
•
Filing: 1965-04-27
•
Granted: 1967-08-15
•
Expires: 1985-04-27
Abstract
No abstract record available.
Inventors
- 👤 Everard C Mersereau
- 👤 Robert M Holloway
- 👤 Robert L Ludington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:24
CPC Classifications
B; B61; B61H; B61H13/00; B61H13/20; B61H13/24
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
96 words
A BRAKE MECHANISM FOR A RAILWAY CAR HAVING A TRUCK CARRYING A PAIR OF WHEELS, SAID MECHANISM COMPRISING A RAILWAY CAR TRUCK FRAME, LEVER MEANS MOUNTED ON SAID FRAME MEMBER, MOTIVE MEANS FOR SAID LEVER MEANS, A BRAKE BEAM HAVING PORTIONS WHICH ARE SELECTIVELY BROUGHT INTO FRICTIONAL ENGAGEMENT WITH SAID PAIR OF SAID WHEELS, SAID LEVER MEANS BEING OPERATIVELY CONNECTED TO SAID BRAKE BEAM, SLACK ADJUSTING MEANS PIVOTALLY CONNECTED TO SAID LEVER MEANS, AND MEANS FOR AUTOMATICALLY TRIGGERING SAID SLACK ADJUSTING MEANS AT A RATE OF SPEED DEPENDING UPON THE LOADING CONDITION OF SAID RAILWAY CAR.
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) | 1970-08-14 | 1971-02-13 | 1971-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-14 | 1975-02-13 | 1975-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-14 | 1979-02-13 | 1979-08-15 | $7700.00 | Window Closed / Lapsed |