US3207271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brake with variable ratio levers
Assignee: Amsted Industries Inc
•
Filing: 1964-01-24
•
Granted: 1965-09-21
•
Expires: 1984-01-24
Abstract
No abstract record available.
Inventors
- 👤 Walter R Polanin
- 👤 Edward J Simanek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:46
CPC Classifications
B; B61; B61H; B61H13/00; B61H13/20; B61H13/30; B61H13/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
IN A TREAD BRAKE RIGGING FOR A SELF-ALIGNING SPRING PLANKLESS RAILWAY FREIGHT CAR TRUCK HAVING SIDE FRAMES SUPPORTED AT THEIR ENDS UPON WHEEL AND AXLE ASSEMBLIES, AND A BOLSTER RESILIENTLY SUPPORTED AT ITS ENDS FOR VERTICAL MOVEMENT UPON SPRING GROUPS SEATED ON THE SIDE FRAMES, TWO BRAKE BEAMS ARRANGED ON OPPOSITE SIDES OF THE BOLSTER AND SLIDABLY SUPPORTED AT THEIR ENDS UPON THE SIDE FRAMES FOR MOVEMENT TOWARD AND AWAY FROM THEIR RESPECTIVE WHEEL AND AXLE ASSEMBLIES, TWO CONVEX BOSSES ON EACH BRAKE BEAM ADJACENT THE ENDS THEREOF, BRAKE SHOES ON OPPOSITE ENDS OF SAID BEAMS TO FRICTIONALLY ENGAGE THE TREAD SURFACES OF THEIR RESPECTIVE WHEELS, TWO BRAKE LEVERS PIVOTALLY SUSPENDED FROM EACH SIDE OF THE BOLSTER AND HAVING FLAT WEARPLATES THEREON FOR SLIDING ABUTTING ENGAGEMENT AGAINST THEIR RESPECTIVE BRAKE BEAM BOSSES, POWER MEANS TO PIVOT SAID BRAKE LEVERS TO MOVE SAID BRAKE BEAMS TOWARD THEIR RESPECTIVE WHEEL AND AXLE ASSEMBLIES TO FRICTIONALLY ENGAGE THE BRAKE SHOES AGAINST THE WHEEL TREAD SURFACES.
Claim 2
Dependent Claim
162 words
IN A TREAD BRAKE RIGGING FOR A SELF-ALIGNING SPRING PLANKLESS RAILWAY FREIGHT CAR TRUCK HAVING SIDE FRAMES SUPPORTED AT THEIR ENDS UPON WHEEL AND AXLE ASSEMBLIES, AND A BOLSTER RESILIENTLY SUPPORTED AT ITS ENDS FOR VERTICAL MOVEMENT UPON SPRING GROUPS SEATED ON THE SIDE FRAMES, TWO BRAKE BEAMS ARRANGED ON OPPOSITE SIDES OF THE BOLSTER AND SLIDABLY SUPPORTED AT THEIR ENDS UPON THE SIDE FRAMES FOR MOVEMENT TOWARD AND AWAY FROM THEIR RESPECTIVE WHEEL AND AXLE ASSEMBLIES, TWO CONVEX BOSSES ON EACH BRAKE BEAM ADJACENT THE ENDS THEREOF, BRAKE SHOES ON OPPOSITE ENDS OF SAID BEAMS TO FRICTIONALLY ENGAGE THE TREAD SURFACES OF THEIR RESPECTIVE WHEELS, TWO BRAKE LEVERS PIVOTALLY SUSPENDED FROM EACH SIDE OF THE BOLSTER AND HAVING FLAT WEARPLATES THEREON FOR SLIDING ABUTTING ENGAGEMENT AGAINST THEIR RESPECTIVE BRAKE BEAM BOSSES, POWER MEANS TO PIVOT SAID BRAKE LEVERS TO MOVE SAID BRAKE BEAMS TOWARD THEIR RESPECTIVE WHEEL AND AXLE ASSEMBLIES TO FRICTIONALLY ENGAGE THE BRAKE SHOES AGAINST THE WHEEL TREAD SURFACES.
References Cited (Backward Citations)
US2885034A
Cited
US2958398A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |