US3788432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical brake assembly
Assignee: Individual
•
Filing: 1972-10-13
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Granted: 1974-01-29
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Expires: 1992-10-13
Abstract
Abstract An electrical wheel brake assembly in which the webs of brake shoes and magnetically operated lever arm which operates the brake shoes are held in a planer alignment between and supported by a pair of parallel spaced, interconnected, supporting plates, in turn supported by an axle, or spindle.
Inventors
- 👤 M Marti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:15
CPC Classifications
F; F16; F16D; F16D55/00; B; B60; B60T; B60T1/00; B60T1/02; B60T1/06; B60T1/067; F16D51/00; F16D51/46; F16D51/48; F16D2051/001; F16D2051/003; F16D2121/00; F16D2121/18; F16D2121/20; F16D2127/00; F16D2127/08; F16D2127/12
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
232 words
An electrical brake assembly adapted to be employed with a brake drum having cooperative armature plate on the inner end surface of the drum comprising: a pair of rigidly connected, spaced, plates adapted to be positioned parallel to said armature plate of said brake drum; a pair of brake shoes, each having an arcuately outer-shaped lining bearing portion adapted to engage the inner peripheral wall of said drum and an inner web perpendicular to said lining bearing portion and adapted to extend between and be aligned by a portion of the inner walls of said plates; spring bias means connected to said brake shoes for normally biasing said lining bearing portion of said brake shoes in a contracted position wherein said lining bearing portions are withdrawn from engagement with said inner peripherial wall of said drums; brake actuating means comprising a lever intermediately attached to and between said plates and between said webs and said brake actuating means having an electromagnet extending from one end of said lever and adapted to frictionally engage said armature plate, and said lever arm having engaging means on the other end of said lever arm adapted to apply a force to an end region of a said web upon said electromagnet being energized and frictionally engaging a rotating said armature plate; whereupon said lining bearing portion of said shoes are forced into engagement with said drum.
Claim 2
Dependent Claim
232 words
An electrical brake assembly adapted to be employed with a brake drum having cooperative armature plate on the inner end surface of the drum comprising: a pair of rigidly connected, spaced, plates adapted to be positioned parallel to said armature plate of said brake drum; a pair of brake shoes, each having an arcuately outer-shaped lining bearing portion adapted to engage the inner peripheral wall of said drum and an inner web perpendicular to said lining bearing portion and adapted to extend between and be aligned by a portion of the inner walls of said plates; spring bias means connected to said brake shoes for normally biasing said lining bearing portion of said brake shoes in a contracted position wherein said lining bearing portions are withdrawn from engagement with said inner peripherial wall of said drums; brake actuating means comprising a lever intermediately attached to and between said plates and between said webs and said brake actuating means having an electromagnet extending from one end of said lever and adapted to frictionally engage said armature plate, and said lever arm having engaging means on the other end of said lever arm adapted to apply a force to an end region of a said web upon said electromagnet being energized and frictionally engaging a rotating said armature plate; whereupon said lining bearing portion of said shoes are forced into engagement with said drum.
Claim 3
Dependent Claim
37 words
An electrical brake assembly as set forth in claim 1 wherein said electromagnet has at least one mounting slot and said lever has an extending arm adapted to fit into said mounting slot and support said electromagnet.
Claim 4
Dependent Claim
30 words
An electrical brake assembly as set forth in claim 1 wherein said spring bias means includes at least one spring interconnecting opposite end regions of webs of said brake shoes.
Claim 5
Dependent Claim
61 words
An electrical brake assembly as set forth in claim 3 wherein said spring bias means includes a pair of return springs interconnecting opposite end regions of webs of said brake shoes, one of said springs being positioned on the outside of one of said plates and the other said springs being positioned on the outside of the other of said plates.
Claim 6
Dependent Claim
52 words
An electrical brake assembly as set forth in claim 1 wherein said plates are generally triangular and there is included an anchor pin interconnected between two opposite apex regions of said plates, and oppositely positioned ends of webs of said brake shoes rest on said anchor pin when in a neutral position.
Claim 7
Dependent Claim
37 words
An electrical brake assembly as set forth in claim 5 wherein said lever is generally oval in configuration and includes a central aperture adapted to fit around an axle in turn adapted to rotably support said drum.
Claim 8
Dependent Claim
69 words
An electrical brake assembly as set forth in claim 1 further comprising an axle assembly adapted to rotably support said drum and rigidly support said plates, whereby braking force is transmitted substantially within a plane between said brake shoes, through said plates, to said axle assembly, which plane is perpendicular to the axis of said drum and said axle assembly and bisects said bearing portion of said brake shoes.
Claim 9
Dependent Claim
40 words
An electrical brake assembly as set forth in claim 7 wherein the center of support of said drum on said axle assembly is 2 to 2 1/2 inches from the center of support of said plates on said axle assembly.
Claim 10
Dependent Claim
21 words
An electrical brake Assembly as set forth in claim 7 wherein said plates are welded to a brake assembly supporting structure.
Claim 11
Dependent Claim
28 words
An electrical brake assembly as set forth in claim 7 wherein said plates each include an aperature adapted to fit around at least a portion of said axle.
Claim 12
Dependent Claim
35 words
An electrical brake assembly as set forth in claim 10 wherein said plates are generally triangular and said apertures of said plates are formed in the center of the base of the triangular configured plates.
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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |