US4031985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanical disc brake
Assignee: Tokico Ltd
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Filing: 1976-10-12
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Granted: 1977-06-28
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Expires: 1996-10-12
Abstract
Abstract A mechanical disc brake comprising a rotary input shaft, a bolt connected at one end to said shaft and abutting at the other end against a friction pad, a nut threaded on said bolt to normally bias said input shaft and a ratchet mechanism provided between said input shaft and nut to transmit the rotation of the input shaft to the nut to thereby displace said bolt toward said friction pad.
Inventors
- 👤 Hiroshi Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:20
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/38; F16D65/40; F16D65/52; F16D65/56; F16D65/567; F16D2125/00; F16D2125/18; F16D2125/20; F16D2125/34; F16D2125/36
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
187 words
A mechanical disc brake comprising an input shaft axially displaceable upon receipt of a rotational movement input, a bolt connected at one end to said input shaft for receiving only said rotational movement of the shaft and abutting at the other end against a friction pad, a nut threaded on said bolt for normally receiving said axial displacement of the input shaft and also for receiving said rotational movement of the input shaft when subjected to clamping force, waved washers disposed on the opposite sides of a radial and outward extension of said nut to normally bias the nut against said input shaft, and a ratchet mechanism disposed between said input shaft and nut to transmit said rotational movement of the input shaft to said nut so as to displace the bolt toward said friction pad in accordance with the rotational amount of the input shaft, characterized in that at least one side of said radial and outward extension of the nut is formed with at least one recess for receiving the projection of one of said waved washers whereby inadvertent rotation of the nut is prevented.
Claim 2
Dependent Claim
187 words
A mechanical disc brake comprising an input shaft axially displaceable upon receipt of a rotational movement input, a bolt connected at one end to said input shaft for receiving only said rotational movement of the shaft and abutting at the other end against a friction pad, a nut threaded on said bolt for normally receiving said axial displacement of the input shaft and also for receiving said rotational movement of the input shaft when subjected to clamping force, waved washers disposed on the opposite sides of a radial and outward extension of said nut to normally bias the nut against said input shaft, and a ratchet mechanism disposed between said input shaft and nut to transmit said rotational movement of the input shaft to said nut so as to displace the bolt toward said friction pad in accordance with the rotational amount of the input shaft, characterized in that at least one side of said radial and outward extension of the nut is formed with at least one recess for receiving the projection of one of said waved washers whereby inadvertent rotation of the nut is prevented.
Claim 3
Dependent Claim
53 words
The mechanical disc brake as set forth in claim 1, further comprising a caliper housing including two opposed half portions in one of which said input shaft is received for axial displacement and rotational movement and said friction pad is slidably received and to the other of which another friction pad is attached.
Claim 4
Dependent Claim
42 words
The mechanical disc brake as set forth in claim 1, in which said ratchet mechanism comprises a ratchet spring having a pawl secured to the flange of said input shaft and a plurality of teeth formed on one side of said nut.
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) | 1980-06-27 | 1980-12-27 | 1981-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-27 | 1984-12-27 | 1985-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-27 | 1988-12-27 | 1989-06-28 | $7700.00 | Window Closed / Lapsed |