Wheelwright machines – Rubber tire mounting and/or demounting apparatus – For collapsing or shifting tire axially
Patent
1974-10-01
1976-05-25
Smith, Al Lawrence
Wheelwright machines
Rubber tire mounting and/or demounting apparatus
For collapsing or shifting tire axially
B60C 2508
Patent
active
039586189
ABSTRACT:
A tire changer machine adapted for use with truck tires including a vertically oriented, stationary frame having a vertical center plane, front and rear faces parallel to that center plane, and a horizontal center axis. The floor of the frame is defined by two vertically adjustable rollers mounted thereon which support a tire positioned within the frame, a ramp oriented parallel to the frame's faces being connected to one of the rollers. A tire positioner device cooperates with a spring load roller linkage system for locating the tire coaxially with the frame's axis once the tire has been positioned within the frame. The frame also pivotally supports a plurality of bead breaker blades at each of the front and rear faces and each blade is radially adjustable relative to the center axis but is not laterally movable. A blade positioner device permits all blades to be adjusted equally and simultaneously. A ram is positioned coaxially with the center axis and adapted to move between extended and retracted positions relative to the frame's face. The nose of the ram is interconnectable with either a rim or a wheel by means of suitable connector tools, thereby mounting the rim or wheel in fixed engagement with the ram. A mount/demount tool drive shaft is concentric with the ram and is adapted to rotate relative thereto. In use, the ram is extended toward the front face until the front bead is broken and then retracted toward the ram face to break the rear bead.
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Smith Al Lawrence
Smith James G.
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