Rim clamp tire changer mounting head adjustment release mechanis

Wheelwright machines – Rubber tire mounting and/or demounting apparatus – For collapsing or shifting tire axially

Patent

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Details

157 12, B60C 25135

Patent

active

057525552

ABSTRACT:
A quick release mechanism for the mount/dismount head of a rim holding tire changer, including a wedge plate that overlies the top of the horizontal bar and has an opening in registry with the opening in the sleeve through which the vertical bar passes. The opening in the wedge plate is shaped to mate with the cross-sectional profile of the vertical bar and is only slightly larger than the size of the bar. Thus, when the wedge plate is horizontal so that the axis of the opening is aligned with the axis of the opening of the sleeve, the vertical bar will move freely up and down in response to pressure on the vertical bar. The wedge plate has protrusions on its under side on one side of the opening and the protrusions rest on the upper face of the sleeve. A actuation handle is attached to the underside of the wedge plate and depends perpendicularly from it. The actuation handle is arcuate so that it mates with the outer perimeter of the sleeve and when held against the sleeve, the axis of the opening of the wedge plate will be aligned with the axis of the opening of the sleeve and the bar will be free to move within the sleeve. On the end of the wedge plate opposite the actuation handle is a spring biasing that end of the wedge arm downwardly. This action causes the angle of the axis of the opening through the wedge plate to be askew to the axis of the opening of the sleeve, thereby reducing the length of the opening by the angle of the thickness of the plate, causing the plate to wedge against the vertical bar and bind it against movement vertically within the sleeve. By this structure, the vertical bar will be held in place unless the operator grips the actuation handle and forces it against the sleeve against the pressure of the spring, causing the openings to be aligned and releasing the vertical bar for movement within the opening of the sleeve.

REFERENCES:
patent: 2773529 (1956-12-01), Valenti
patent: 4581959 (1986-04-01), Troiano
patent: 4896712 (1990-01-01), du Quesne

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