US3677375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle brake
Assignee: Individual
•
Filing: 1970-08-31
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Granted: 1972-07-18
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Expires: 1990-08-31
Abstract
Abstract A vehicle brake of the spread shoe type is provided with a ball spreading device for spreading the shoes into braking engagement with a pair of spaced apart disks, there being a lever operatively connected at one end to the latter and at the other end mounting an electromagnet in proximity to one of the disks whereby upon energization of the electromagnet the lever follows the disk, causing the balls to spread and thereby spreading the shoes into braking engagement with the disks.
Inventors
- 👤 Lloyd J Wolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:19
CPC Classifications
F; F16; F16D; F16D55/00; F16D55/02; F16D55/04; F16D55/14; F16D65/00; F16D65/14; F16D65/28; F16D2121/00; F16D2121/18; F16D2121/20; F16D2125/00; F16D2125/18; F16D2125/20; F16D2125/34; F16D2125/36
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
187 words
A vehicle brake comprising a rotor having a pair of axially spaced disks, an element nonrotatably positioned between said disks with a mounting portion radially outwardly of said disks, a pair of axially aligned shoes carried between the disks by said nonrotatable element for axial movement only thereof toward and away from the respective disks, said shoes being axially spaced from each other and having rounded projections from their opposing surfaces, an axial shaft rotatably mounted in said nonrotatable element radially outwardly of said disks, an arm rigidly mounted on said shaft and extending radially inwardly between said shoes and having shallow V-shaped depressions in its opposite surfaces normally receiving said shoe projections, a lever rigidly connected at one end to said shaft and mounting an electromagnet at its other end near the periphery of one of said disks at a location angularly remote from said nonrotatable element whereby, upon energization of said magnet, rotation of said rotor is imparted to said lever and thereby to said arm to force said shoe projections outwardly of said arm depressions And cause said shoes to brakingly engage said disks.
Claim 2
Dependent Claim
187 words
A vehicle brake comprising a rotor having a pair of axially spaced disks, an element nonrotatably positioned between said disks with a mounting portion radially outwardly of said disks, a pair of axially aligned shoes carried between the disks by said nonrotatable element for axial movement only thereof toward and away from the respective disks, said shoes being axially spaced from each other and having rounded projections from their opposing surfaces, an axial shaft rotatably mounted in said nonrotatable element radially outwardly of said disks, an arm rigidly mounted on said shaft and extending radially inwardly between said shoes and having shallow V-shaped depressions in its opposite surfaces normally receiving said shoe projections, a lever rigidly connected at one end to said shaft and mounting an electromagnet at its other end near the periphery of one of said disks at a location angularly remote from said nonrotatable element whereby, upon energization of said magnet, rotation of said rotor is imparted to said lever and thereby to said arm to force said shoe projections outwardly of said arm depressions And cause said shoes to brakingly engage said disks.
Claim 3
Dependent Claim
53 words
A vehicle brake according to claim 1 wherein each said shoe is formed with a ball socket in its surface opposing said other shoe, and a ball is seated in each said socket with a portion projecting from the face of the shoe, said rounded projections comprising the projecting portions of said balls.
Claim 4
Dependent Claim
15 words
A vehicle brake according to claim 2 wherein said arm depressions are of conical shape.
Claim 5
Dependent Claim
36 words
A vehicle brake according to claim 3, including a nonrotatable axle structure, wheel structure rotatably journaled thereon, said rotor being rigidly secured to said wheel structure, said nonrotatable element being rigidly connected to said axle structure.
Claim 6
Dependent Claim
43 words
A vehicle brake according to claim 4, including a radial arm rigidly secured at its inner end to said axle structure inboard from said rotor and rigidly secured at its outer end to said nonrotatable element to mount the same on said axle.
Claim 7
Dependent Claim
55 words
A vehicle brake according to claim 5 wherein said shaft extends inboard from said mounting arm and said lever is mounted on the end thereof, said electromagnet being disposed on the opposite side of said axle from said nonrotatable element, said lever being curved in a plane normal to said axle to clear said axle.
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) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |