US3556260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brake device for the wheel of a conveyance
Assignee: Individual
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Filing: 1968-11-25
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Granted: 1971-01-19
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Expires: 1988-11-25
Abstract
Abstract A brake device for the wheel of a conveyance, wherein the brake device is provided with a brakeshoe movable at its upper end about a fixed bearing point and a lever linkage connected to the lower end thereof, the lever linkage having a manual operating handle and being formed as a toggle such that the brakeshoe is maintained in either an operative or an inoperative position as the toggle is moved from one side to the other.
Inventors
- 👤 Wilhelm Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:26
CPC Classifications
A; A61; A61G; A61G5/00; A61G5/10; A61G5/1005; A61G5/101; A61G5/1008; A61G5/1013; A61G5/1018; A61G5/1035; B; B62; B62B; B62B5/00; B62B5/04; B62B5/0485; Y; Y10; Y10S; Y10S188/00; Y10S188/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
179 words
A braking and reverse locking device for wheelchairs including a pedestal bearing locatable on the wheelchair chassis, a brakeshoe pivotably mounted on said pedestal bearing, a toggle lever linkage pivotally connected at one end to said brakeshoe and at its other end connecting with a hand lever and being pivotally moUnted on said pedestal bearing with said lever being operable to move the brakeshoe into a position of use and a position of nonuse, and with said toggle lever linkage for the braking position being adapted to be hinged with its central hinge point beyond the dead center in the direction of the wheel to be braked, and a reverse lock arm pivotally mounted on said brakeshoe and spring-biased into operative and inoperative positions whereby in said operative position said reverse lock arm is downwardly pivotal towards the wheel and adapted to be held in said position during the forward movement of the wheel against its surface while being adapted to be pressed into the wheel surface upon the reverse movement of the wheel to effect simultaneous automatic braking.
Claim 2
Dependent Claim
179 words
A braking and reverse locking device for wheelchairs including a pedestal bearing locatable on the wheelchair chassis, a brakeshoe pivotably mounted on said pedestal bearing, a toggle lever linkage pivotally connected at one end to said brakeshoe and at its other end connecting with a hand lever and being pivotally moUnted on said pedestal bearing with said lever being operable to move the brakeshoe into a position of use and a position of nonuse, and with said toggle lever linkage for the braking position being adapted to be hinged with its central hinge point beyond the dead center in the direction of the wheel to be braked, and a reverse lock arm pivotally mounted on said brakeshoe and spring-biased into operative and inoperative positions whereby in said operative position said reverse lock arm is downwardly pivotal towards the wheel and adapted to be held in said position during the forward movement of the wheel against its surface while being adapted to be pressed into the wheel surface upon the reverse movement of the wheel to effect simultaneous automatic braking.
Claim 3
Dependent Claim
87 words
A braking device as claimed in claim 1 in which the pedestal bearing has two juxtaposed bearing points, one of which points serves as the mounting for said brakeshoe and the other as the mounting for said toggle lever linkage, the upper end of said brakeshoe being mounted on said pedestal bearing and the lower end of said brakeshoe being pivotally connected with said toggle lever linkage, and a tension spring located between bearing block and brakeshoe to urge and retain the latter in the inoperative position.
Claim 4
Dependent Claim
101 words
A braking device as claimed in claim 1 in which said reverse lock arm is pivotably mounted on the lower end of said brakeshoe, and a tension spring is connected at its one end in the region between this pivot point and the operating surface of said reverse lock arm and at its other end is connected to the brakeshoe in the region between its upper bearing point and the pivot point of the reverse lock arm, with the mounting points of the tension spring and the hinge point of the reverse lock located at the end points of a triangle.
Claim 5
Dependent Claim
27 words
A brake device as claimed in claim 1 in which said brakeshoe is provided with limit stops for said toggle lever linkage and said reverse lock arm.
Claim 6
Dependent Claim
35 words
A brake device as claimed in claim 1 in which the operating surfaces of said brakeshoe and said reverse lock arm are convex, and are provided with grooves within the arc formed by said surfaces.
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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |