Wheelwright machines – Rubber tire mounting and/or demounting apparatus – For collapsing or shifting tire axially
Patent
1977-11-03
1979-08-07
Smith, James G.
Wheelwright machines
Rubber tire mounting and/or demounting apparatus
For collapsing or shifting tire axially
B60C 2506
Patent
active
041634683
ABSTRACT:
For thrusting perpendicular to a tire to demount it, or similar purposes, a hydraulic cylinder bearing a thrust shoe is pivotably mounted, by trunnion pins on its casing, to a support frame beneath a slotted platform. A forward arm and follower assembly pivots on the trunnion pins and extends diagonally forward normally to bear on the hydraulic cylinder casing; while a similar aft arm and follower assembly likewise pivots on the trunnion pins, extending aft and normally bearing on the opposite side of the hydraulic cylinder casing. Corresponding portions of these aft and forward assemblies are connected by coil springs; their inward pivotal movement is limited by a stop on the support frame; thus they constantly urge the hydraulic cylinder toward upright position. To correct angular drifting of the actuator rod, its shoe has a downward projecting centering shield having a tapered tip which engages a platform slot when the hydraulic cylinder is retracted, rotating the shoe to its proper position.
REFERENCES:
patent: 3722570 (1973-03-01), McKenney
patent: 4031941 (1977-06-01), Malinski et al.
patent: 4059140 (1977-11-01), Sedgwick
Gross Jerome A.
Malinski S. W.
Smith James G.
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