US4234060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brake equipment
Assignee: Coal Industry Patents Ltd
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Filing: 1978-06-29
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Granted: 1980-11-18
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Expires: 1998-06-29
Abstract
Abstract Brake equipment for a vehicle or mining machine which in use traverses along a path adjacent to a stationary rail comprises a rail engaging component including a wedge assembly resilient means for urging the rail engaging component into a `brake applied` mode contacting the rail and ram means for urging the rail engaging component into a `brake released` mode out of contact with the rail. The brake equipment includes further ram means for urging the wedge assembly out of a rail engaging position when the brake is released.
Inventors
- 👤 Roger Barsted
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:06
CPC Classifications
E; E21; E21C; E21C35/00; E21C35/04; B; B60; B60T; B60T13/00; B60T13/10; B60T13/12; B60T13/22; B61; B61H; B61H7/00; B61H7/02; B61H7/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
247 words
Brake equipment for a vehicle or mining machine which in use traverses along a path adjacent to a stationary anchored rail, comprising first and second relatively movable jaws respectively providing co-acting first and second brake elements slidable along the rail and respectively mounted on opposite sides of the rail, first resilient means for urging relative movement of the first jaw transversely towards the rail such that, in use, the brake element of the first jaw is urged to contact the rail, and first fluid actuated means for urging the first jaw such that the first brake element is urged out of braking contact with the rail, the second brake element including a wedge assembly having a wedge component and a rail engaging component which, in use, when the second brake element is urged into contact the rail, upon contacting the rail the rail engaging component is urged by relative movement of the components in the wedge assembly to increase the braking force of the second brake element on the rail, the wedge assembly comprising a resilient bias for urging the rail engaging component of the wedge assembly substantially along the rail relative to the wedge component towards a rail engaging position and second fluid actuated means for urging the rail engaging component of the wedge assembly out of a rail engaging position, when, in use, the first fluid actuated means urges the first jaw to urge the first brake element out of braking contact with the rail.
Claim 2
Dependent Claim
247 words
Brake equipment for a vehicle or mining machine which in use traverses along a path adjacent to a stationary anchored rail, comprising first and second relatively movable jaws respectively providing co-acting first and second brake elements slidable along the rail and respectively mounted on opposite sides of the rail, first resilient means for urging relative movement of the first jaw transversely towards the rail such that, in use, the brake element of the first jaw is urged to contact the rail, and first fluid actuated means for urging the first jaw such that the first brake element is urged out of braking contact with the rail, the second brake element including a wedge assembly having a wedge component and a rail engaging component which, in use, when the second brake element is urged into contact the rail, upon contacting the rail the rail engaging component is urged by relative movement of the components in the wedge assembly to increase the braking force of the second brake element on the rail, the wedge assembly comprising a resilient bias for urging the rail engaging component of the wedge assembly substantially along the rail relative to the wedge component towards a rail engaging position and second fluid actuated means for urging the rail engaging component of the wedge assembly out of a rail engaging position, when, in use, the first fluid actuated means urges the first jaw to urge the first brake element out of braking contact with the rail.
Claim 3
Dependent Claim
19 words
Brake equipment as claimed in claim 1, in which two wedge assembly components are slidably connected by a slideway.
Claim 4
Dependent Claim
31 words
Brake equipment as claimed in claim 2, in which the two wedge assembly components are mounted intermediate two blocks which carry the further fluid actuated means and the resilient bias, respectively.
Claim 5
Dependent Claim
39 words
Brake equipment as claimed in claim 3, in when the brake equipment is in the `brake released` mode a braking face of the rail engaging component is more remote from the rail than the corresponding faces on the blocks.
Claim 6
Dependent Claim
20 words
Brake equipment as claimed in claim 1 in which the rail engaging component is constituted by a second wedge component.
Claim 7
Dependent Claim
18 words
Brake equipment as claimed in claim 1 in which both wedge components are slidably connected by a slideway.
Claim 8
Dependent Claim
29 words
Brake equipment as claimed in claim 6 in which both wedge components are mounted intermediate two blocks which carry the further fluid actuated means and the resilient bias, respectively.
Claim 9
Dependent Claim
46 words
Brake equipment as claimed in claim 7 in which the rail engaging component comprises a braking face for contacting the rail which, when the braking equipment is in a `brake release` mode, is more remote from the rail than corresponding rail facing faces on the blocks.
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) | 1983-11-18 | 1984-05-19 | 1984-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-18 | 1988-05-19 | 1988-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-18 | 1992-05-19 | 1992-11-18 | $7700.00 | Window Closed / Lapsed |