Patent US2031172A successfully refreshed from Google Patents.
US3309934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gear transmission oil pump and countershaft brake mechanism
Assignee: Mack Trucks Inc
•
Filing: 1964-06-10
•
Granted: 1967-03-21
•
Expires: 1984-06-10
Abstract
No abstract record available.
Inventors
- 👤 Carl J Gustafsson
- 👤 Arthur L Stepansky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:15
CPC Classifications
F; F16; F16H; F16H57/00; F16H57/04; F16H57/0434; F16H3/00; F16H3/02; F16H3/08; F16H3/12; F16H2003/123; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19284; Y10T74/19637
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A COUNTERSHAFT BRAKE MECHANISM FOR VEHICLES HAING A CLUTCH AND A GEAR TRANSMISSION HAVING A COUNTERSHAFT, COMPRISING MEANS DEFINING A PRESSURE CHAMBER, FIRST FRICTIONAL BRAKE MEANS OPERABLY COUPLED TO SAID COUNTERSHAFT AND DISPOSED IN SAID CHAMBER, A PISTON DISPOSED IN SAID CHAMBER FOR MOVEMENT TOWARD AND AWAY FROM SAID BRAKE MEANS, MEANS COUPLED TO SAID PISTON TO IMPEDE THE ROTATION THEREOF, SECOND FRICTIONAL BRAKE MEANS ON SAID PISTON AND MOVABLE THEREWITH INTO ENGAGEMENT WITH
Claim 2
Dependent Claim
74 words
A COUNTERSHAFT BRAKE MECHANISM FOR VEHICLES HAING A CLUTCH AND A GEAR TRANSMISSION HAVING A COUNTERSHAFT, COMPRISING MEANS DEFINING A PRESSURE CHAMBER, FIRST FRICTIONAL BRAKE MEANS OPERABLY COUPLED TO SAID COUNTERSHAFT AND DISPOSED IN SAID CHAMBER, A PISTON DISPOSED IN SAID CHAMBER FOR MOVEMENT TOWARD AND AWAY FROM SAID BRAKE MEANS, MEANS COUPLED TO SAID PISTON TO IMPEDE THE ROTATION THEREOF, SECOND FRICTIONAL BRAKE MEANS ON SAID PISTON AND MOVABLE THEREWITH INTO ENGAGEMENT WITH
References Cited (Backward Citations)
US1851571A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-20 | 1970-09-19 | 1971-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-20 | 1974-09-19 | 1975-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-20 | 1978-09-19 | 1979-03-21 | $7700.00 | Window Closed / Lapsed |