Patent US4023656A successfully refreshed from Google Patents.
US4023656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wet type band brake apparatus
Assignee: Komatsu Ltd
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Filing: 1975-12-12
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Granted: 1977-05-17
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Expires: 1995-12-12
Abstract
Abstract A wet type band apparatus characterized by the construction that, in the wet type band brake apparatus provided on the outer periphery of the brake drum with the lining fixed on the inner periphery of the brake band, a groove is cut on the contact surface of the lining in the peripheral direction, oil holes are perforated through the brake band and lining with their openings in the groove and at the same time, lubricating oil is supplied to the aforesaid oil holes and the discontinuous part located at the opening of the aforesaid brake band respectively.
Inventors
- 👤 Toshikazu Kuwahara
- 👤 Ryokichi Nishida
- 👤 Kenji Kumagae
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:49
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/78; F16D65/80; F16D69/00; F16D2069/004
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
145 words
A wet type band brake apparatus comprising a brake drum, a brake lining mounted on the periphery of said brake drum, said brake lining having a groove along the entire circumference of the contact surface thereof and a hole passing through said lining into said groove to introduce oil therethrough, a brake band mounted on the periphery of said brake lining, said brake band having a hole therein aligned with the hole in said brake lining to introduce oil therethrough, an inlet port for oil positioned at a discontinuous portion of said brake lining and said brake band and, means for introducing oil into said hole in said brake band and said inlet port whereby oil flows through said hole in said brake lining, into said groove and then onto the contact surface of said brake lining thereby cooling friction heat caused by braking action.
Claim 2
Dependent Claim
145 words
A wet type band brake apparatus comprising a brake drum, a brake lining mounted on the periphery of said brake drum, said brake lining having a groove along the entire circumference of the contact surface thereof and a hole passing through said lining into said groove to introduce oil therethrough, a brake band mounted on the periphery of said brake lining, said brake band having a hole therein aligned with the hole in said brake lining to introduce oil therethrough, an inlet port for oil positioned at a discontinuous portion of said brake lining and said brake band and, means for introducing oil into said hole in said brake band and said inlet port whereby oil flows through said hole in said brake lining, into said groove and then onto the contact surface of said brake lining thereby cooling friction heat caused by braking action.
Claim 3
Dependent Claim
20 words
A wet type band brake apparatus of claim 1, wherein said brake lining has a plurality of crossed grooves thereon.
Claim 4
Dependent Claim
32 words
A wet type band brake apparatus of claim 1, wherein the holes in said brake lining and said brake band are positioned at the top portion thereof when mounted to a vehicle.
References Cited (Backward Citations)
US1271163A
Cited
US1592846A
Cited
US1707987A
Cited
US1882037A
Cited
US1860375A
Cited
US3044736A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-16 | 1980-11-15 | 1981-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-16 | 1984-11-15 | 1985-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-16 | 1988-11-15 | 1989-05-17 | $7700.00 | Window Closed / Lapsed |