1986-02-10
1988-07-19
Apley, Richard J.
Surgery
Truss
Perineal
128 92ZW, 24136B, 2483162, 403354, 403374, A61F 504
Patent
active
047578092
ABSTRACT:
A pin clamp particularly adapted for use in an external skeletal fixation device to clamp pins inserted in the distal segment and/or proximal segment of a fractured bone for positioning and immobilizing the bone segments to reduce the fracture. The pin clamp employs a wedge lock construction including a block having a tapered, hollow interior which receives a wedge element having opposed, tapered sidewalls connected to a slotted top wall. The pins are inserted between the sidewalls of the wedge element into the slot, and are clamped therebetween as the wedge element is moved into the block. A screw carried by the block threads into a bore in the top wall of the wedge element to move the wedge element in and out of the block. Both the block and wedge element are formed of a composite material and the sidewalls of the wedge element which contact the pins are preferably coated with a grit material having a high coefficient of friction.
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Howmedica, Inc. brochure, "The External Fixation System", pp. 1-32.
E. Y. Chao et al, J. Biomechanics, "Rigidity and Stress Analyses of External Fracture Fixation Devices-a Theoretical Approach", vol. 15, No. 12, pp. 971-982.
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Ace Medical brochure, "The Ace-Fischer Fixator", pp. 1-12.
Hansen Thomas M.
Koeneman James B.
Phillips Mark
Weinstein Allan M.
Apley Richard J.
Bender David J.
Orthotic Limited Partnership
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