US3637053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disc brake apparatus
Assignee: Disco Industries Inc
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Filing: 1970-03-30
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Granted: 1972-01-25
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Expires: 1990-03-30
Abstract
Abstract A vehicle brake apparatus for attachment to the axle of a vehicle, has rotatable disc attached so as to rotate with the wheel of a vehicle and having free-floating pistons adapted to slide in cylinder bores of cylinders attached to the axle of the vehicle, and a telescoping brakeshoe actuated in one direction by the free-floating pistons whereby pneumatic or hydraulic pressure on the cylinder will move the piston telescoping the brakeshoe and brake lining into frictional engagement with the disc. The telescoping brakeshoe has bearings to maintain the telescoping portion in alignment and may have segmented portions for cooling and a spring return.
Inventors
- 👤 Elmo N Boyles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:37
CPC Classifications
F; F16; F16D; F16D55/00; F16D55/02; F16D55/22; F16D55/228; F16D65/00; F16D65/78; F16D65/84; F16D65/847
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
221 words
A disc brake apparatus for a vehicle comprising in combination: a. axle means attached to a vehicle; b. rotatable disc means adapted to be fixedly attached to a wheel for rotation therewith; c. a plurality of cylinders attached to said axle means and each said cylinder having cylinder walls with a cylindrical bore therein on at least one side of said disc means; d. a free-floating cylindrical piston located in each said bore of said cylinders for sliding therein; e. telescoping brakeshoe means having a telescoping portion movably fitted over said cylinder walls and adapted to be moved in one direction by movement of said free-floating piston in said one direction; f. a plurality of bearings located between the exterior of said walls and the interior of said telescoping portion of said brakeshoe means to said bearings being adapted to resist rotation between said telescoping brakeshoe means and said cylinders; g. each said bearing being fitted in a groove located in said exterior cylinder wall and in a groove located in each said telescoping portion of said brakeshoe means; and h. brake lining means attached to said brakeshoe means and adapted to frictionally engage said disc means whereby movement of said piston means in said cylinder bores will telescope said brakeshoe means engaging said brake lining means with said disc means.
Claim 2
Dependent Claim
221 words
A disc brake apparatus for a vehicle comprising in combination: a. axle means attached to a vehicle; b. rotatable disc means adapted to be fixedly attached to a wheel for rotation therewith; c. a plurality of cylinders attached to said axle means and each said cylinder having cylinder walls with a cylindrical bore therein on at least one side of said disc means; d. a free-floating cylindrical piston located in each said bore of said cylinders for sliding therein; e. telescoping brakeshoe means having a telescoping portion movably fitted over said cylinder walls and adapted to be moved in one direction by movement of said free-floating piston in said one direction; f. a plurality of bearings located between the exterior of said walls and the interior of said telescoping portion of said brakeshoe means to said bearings being adapted to resist rotation between said telescoping brakeshoe means and said cylinders; g. each said bearing being fitted in a groove located in said exterior cylinder wall and in a groove located in each said telescoping portion of said brakeshoe means; and h. brake lining means attached to said brakeshoe means and adapted to frictionally engage said disc means whereby movement of said piston means in said cylinder bores will telescope said brakeshoe means engaging said brake lining means with said disc means.
Claim 3
Dependent Claim
42 words
The apparatus in accordance with claim 1 in which said cylinders include two pairs of cylinders, one pair on each side of said disc means, and said pistons include two pairs of pistons, one pair on each side of said disc means.
Claim 4
Dependent Claim
40 words
The apparatus in accordance with claim 2 in which the brake lining means includes one lining on either side of said disc means, each said lining being an annular plate lining adapted for a 360* engagement with said disc means.
Claim 5
Dependent Claim
32 words
The apparatus in accordance with claim 3 but including a spring-actuated return means for applying a force to said brakeshoe means opposite to that applied by said activation of said piston means.
Claim 6
Dependent Claim
15 words
The apparatus in accordance with claim 4 in which said bearing means includes linear-type bearings.
Claim 7
Dependent Claim
46 words
The apparatus in accordance with claim 5 in which said brake apparatus is pneumatically operated to expand a chamber in said cylinder means, to slide said piston means therein to activate said brakeshoe means for frictional engagement of said brake lining means with said disc means.
Claim 8
Dependent Claim
21 words
The apparatus in accordance with claim 6 in which said brake lining means includes a pair of metallic composite brake linings.
Claim 9
Dependent Claim
16 words
The apparatus in accordance with claim 7 in which said brakeshoe means have spaced cooling fins.
Claim 10
Dependent Claim
27 words
The apparatus in accordance with claim 8 in which said spaced cooling fins form an impeller for increasing the movement of cooling air around said brake apparatus.
Claim 11
Dependent Claim
26 words
The apparatus in accordance with claim 8 but including a housing means covering said brake apparatus, said housing having openings for the passage of cooling air.
Claim 12
Dependent Claim
16 words
The apparatus in accordance with claim 8 in which said brake lining includes spaced segment therein.
Claim 13
Dependent Claim
17 words
The apparatus in accordance with claim 11 in which said cylinders and said housing are formed together.
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) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |