Patent US3823757A successfully refreshed from Google Patents.
US3823757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for use in mounting tires on and removing tires from wheel rims
Assignee: DUNLAP Ltd
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Filing: 1972-06-14
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Granted: 1974-07-16
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Expires: 1992-06-14
Abstract
Abstract Apparatus for use in mounting tires on and removing tires from wheel rims comprising a wheel supporting means which comprises three slideable and pivotal arms mounted between two rotatable coaxial plates which on being relatively rotated cause the arms to pivot and slide thereby gripping a wheel. The first plate is rotatably driven and the second plate is continuously engaged by braking means. Resilient means act on the second plate to increase the reaction force between the second plate and the braking means.
Inventors
- 👤 D Hogg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:30
CPC Classifications
B; B60; B60B; B60B30/00; B60B30/06; B60C; B60C25/00; B60C25/01; B60C25/05; B60C25/053; B60C25/0539; B60C25/0545
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
172 words
Apparatus for use in mounting tires on and removing tires from wheel rims including a wheel supporting means comprising a drivably rotatable first plate, a rotatable second plate arranged coaxially with the first plate, a wheel rim gripping means comprising at least three arms each pivotally mounted at one end on one of said plates, the arms being in circumferentiallyspaced-apart relationship and each being slidably and pivotally mounted on the other of said plates at a position intermediate its ends, braking means continuously engaging the second plate, resilient means acting on the second plate to maintain a reaction force between the second plate and the braking means, and means for drivably rotating the first plate to cause relative rotation between the first and second plates whereby the arms are caused to pivot about their pivotally mounted ends such thaT their free ends remote from said pivotally mounted ends move either inwards or outwards, depending on the direction of the relative rotation, to be respectively engaged with or disengaged from a wheel rim.
Claim 2
Dependent Claim
172 words
Apparatus for use in mounting tires on and removing tires from wheel rims including a wheel supporting means comprising a drivably rotatable first plate, a rotatable second plate arranged coaxially with the first plate, a wheel rim gripping means comprising at least three arms each pivotally mounted at one end on one of said plates, the arms being in circumferentiallyspaced-apart relationship and each being slidably and pivotally mounted on the other of said plates at a position intermediate its ends, braking means continuously engaging the second plate, resilient means acting on the second plate to maintain a reaction force between the second plate and the braking means, and means for drivably rotating the first plate to cause relative rotation between the first and second plates whereby the arms are caused to pivot about their pivotally mounted ends such thaT their free ends remote from said pivotally mounted ends move either inwards or outwards, depending on the direction of the relative rotation, to be respectively engaged with or disengaged from a wheel rim.
Claim 3
Dependent Claim
42 words
Apparatus according to claim 1 wherein the braking means comprises a stationary ring of friction material having a part conical outer surface and the second plate is formed with a frusto conical surface on which the said part conical outer surface engages.
Claim 4
Dependent Claim
12 words
Apparatus according to claim 1 wherein the resilient means comprises spring means.
Claim 5
Dependent Claim
39 words
Apparatus according to claim 1 wherein the resilient means comprises a plurality of dished annuli arranged coaxially with the plates so as to act on the surface of the second plate opposite to that engaged by the braking means.
References Cited (Backward Citations)
US3238989A
Cited
US3557861A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-15 | 1978-01-14 | 1978-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-15 | 1982-01-14 | 1982-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-15 | 1986-01-14 | 1986-07-16 | $7700.00 | Window Closed / Lapsed |