Patent US4570761A successfully refreshed from Google Patents.
US4570761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cabling structure of parking cables for drum brakes
Assignee: Akebono Brake Industry Co Ltd
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Filing: 1984-07-12
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Granted: 1986-02-18
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Expires: 2004-07-12
Abstract
Abstract Herein disclosed is a cabling structure of a parking cable for a drum brake which is equipped with a backing plate, a brake shoe and a parking lever. A pulley is hinged in a swinging manner to the backing plate or the brake shoe and is formed with two arcuate grooves having different radii measured from the hinging axis. First and second cables are hung in the two arcuate grooves, respectively, and are connected to a brake actuating mechanism and the parking lever, respectively. The direction of leading out the parking cable can be different from that of the force for pulling the parking lever without any breakage of the parking cable. The pulley may alternatively be formed with one arcuate groove. Then, the second cable connected to the parking lever is retained on the pulley such that it extends to partially contact with the first cable.
Inventors
- 👤 Takashi Inoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:42
CPC Classifications
F; F16; F16D; F16D51/00; F16D51/16; F16D51/18; F16D51/20; F16D51/22; F16C; F16C1/00; F16C1/10; F16C1/101; F16C1/12; F16C1/18; F16C2361/00; F16C2361/45; F16D2125/00; F16D2125/18; F16D2125/58; F16D2125/60; F16D2125/62; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18832
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
136 words
A cabling structure of a parking cable for a brake mechanism including a drum brake having a backing plate, a brake shoe and a parking lever, comprising: means for increasing mechanical advantage in the cabling structure between the parking lever and the brake shoe including a pulley supported by said brake mechanism for swinging movement about an axis and having two arcuate grooves having different radii measured from said axis thereof; and first and second independent cables slidably received in the two arcuate grooves of said pulley, respectively, and having terminal ends releasably connected to said pulley and cable portions extending to said brake actuating mechanism and said parking lever, respectively, so that the direction of leading out said parking cable may be different from the direction of leading in said parking cable to the pulley.
Claim 2
Dependent Claim
136 words
A cabling structure of a parking cable for a brake mechanism including a drum brake having a backing plate, a brake shoe and a parking lever, comprising: means for increasing mechanical advantage in the cabling structure between the parking lever and the brake shoe including a pulley supported by said brake mechanism for swinging movement about an axis and having two arcuate grooves having different radii measured from said axis thereof; and first and second independent cables slidably received in the two arcuate grooves of said pulley, respectively, and having terminal ends releasably connected to said pulley and cable portions extending to said brake actuating mechanism and said parking lever, respectively, so that the direction of leading out said parking cable may be different from the direction of leading in said parking cable to the pulley.
Claim 3
Dependent Claim
27 words
A cabling structure according to claim 1 wherein one of said grooves has an effective radius smaller than that of the other for a smaller diameter cable.
Claim 4
Dependent Claim
17 words
A cabling structure according to claim 1 wherein said two grooves are formed in a common plane.
Claim 5
Dependent Claim
27 words
A cabling structure according to claim 1 wherein said two grooves are offset from each other with respect to the direction of the axis of said pulley.
Claim 6
Dependent Claim
170 words
A cabling structure of a parking cable for a brake actuating mechanism including a drum brake having a backing plate, a brake shoe and a parking lever, comprising: means for increasing mechanical advantage in the cabling structure between the parking lever and the brake shoe including a pulley supported by said brake mechanism for swinging movement about an axis and having a pair of concentric arcuate grooves; a first cable connected to said brake actuating mechanism and slidably received in one of said grooves of said pulley and having a terminal end releasably connected to said pulley; and a second cable independent from said first cable having a terminal end releasably connected to said pulley and a cable portion connected to said parking lever and retained in a second arcuate groove of said pulley such that it extends to partially contact with said first cable, so that the direction of leading out said parking cable may be different from the direction of leading in said parking cable to said pulley.
Claim 7
Dependent Claim
170 words
A cabling structure of a parking cable for a brake actuating mechanism including a drum brake having a backing plate, a brake shoe and a parking lever, comprising: means for increasing mechanical advantage in the cabling structure between the parking lever and the brake shoe including a pulley supported by said brake mechanism for swinging movement about an axis and having a pair of concentric arcuate grooves; a first cable connected to said brake actuating mechanism and slidably received in one of said grooves of said pulley and having a terminal end releasably connected to said pulley; and a second cable independent from said first cable having a terminal end releasably connected to said pulley and a cable portion connected to said parking lever and retained in a second arcuate groove of said pulley such that it extends to partially contact with said first cable, so that the direction of leading out said parking cable may be different from the direction of leading in said parking cable to said pulley.
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) | 1989-02-17 | 1989-08-19 | 1990-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-17 | 1993-08-19 | 1994-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-17 | 1997-08-19 | 1998-02-18 | $7700.00 | Window Closed / Lapsed |