Patent US3818968A successfully refreshed from Google Patents.
US3818968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for use in mounting tires on and removing tires from wheel rims
Assignee: Dunlop Ltd
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Filing: 1972-05-08
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Granted: 1974-06-25
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Expires: 1992-05-08
Abstract
Abstract An apparatus for mounting and removing tires from wheel rims having at least three arms with means to engage the wheel rim for holding it. Each of the arms has one end pivotally secured to a circular plate and the center portion of each arm is slidably and pivotally mounted to another circular plate so that the free ends of the arms are radially movable when one plate is rotated in relation to the other. Braking means continuously engage one of the plates to insure relative rotation between the plates. The braking means move in a radial direction so that the braking surfaces will be self-cleaning.
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; B60C25/0545
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
194 words
Apparatus for use in mounting tires on and removing tires from wheel rims comprising a base member and a wheel supporting member comprising a drivably rotatable first plate, a rotatable second plate arranged coaxially with said first plate, an annular collar extending in an axial direction from said second plate and having a cylindrical surface thereon, a wheel rim gripping means comprising at least three arms each having one of its ends pivotally mounted to one of said plates, the arms being in circumferentially spaced apart relationship and each being slidably and pivotally mounted on the other of said plates at a position intermediate its ends, braking means mounted on said base member and continuously engaging said cylindrical surface of the second plate to apply a substantially radial force thereto, 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 relative rotation, to become respectively engaged with or disengaged from a wheel rim.
Claim 2
Dependent Claim
194 words
Apparatus for use in mounting tires on and removing tires from wheel rims comprising a base member and a wheel supporting member comprising a drivably rotatable first plate, a rotatable second plate arranged coaxially with said first plate, an annular collar extending in an axial direction from said second plate and having a cylindrical surface thereon, a wheel rim gripping means comprising at least three arms each having one of its ends pivotally mounted to one of said plates, the arms being in circumferentially spaced apart relationship and each being slidably and pivotally mounted on the other of said plates at a position intermediate its ends, braking means mounted on said base member and continuously engaging said cylindrical surface of the second plate to apply a substantially radial force thereto, 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 relative rotation, to become respectively engaged with or disengaged from a wheel rim.
Claim 3
Dependent Claim
48 words
Apparatus according to claim 1 wherein the braking means comprises a plurality of pads of friction material and resilient means on which the pads are each supported separately for engagement with the cylindrical surface of said collar, the pads thus applying a substantially radial force to the collar.
Claim 4
Dependent Claim
10 words
Apparatus according to claim 2 wherein the pads are demountable.
Claim 5
Dependent Claim
28 words
Apparatus according to claim 1 wherein said cylindrical surface is formed on the interior of said collar and the braking means applies a substantially radially outward force thereto.
Claim 6
Dependent Claim
28 words
Apparatus according to claim 1 wherein the cylindrical surface is formed on the exterior of said collar and the braking means applies a substantially radially inwards force thereto.
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) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |