360 degree shoulder clamp elevator and method of use

摘要

A self-balancing, shoulder type elevator is comprised of two opposing jaws pivotally connected to a hinge plate. The jaws are engaged for rotation at the hinge plate by corresponding sets of gear teeth. Hangers on said jaws attach the elevator to suspending bails. An offset alignment linkage pivotally attaches each jaw to the hinge plate and a rotatable spindles pivotally attached perpendicular to the jaws. The alignment linkage maintains the spindles angularly congruent in orientation with the bails when the opposing jaws are pivoted open and closed.

主权项

1. An elevator comprising:
(a) a pair of opposing semi-circular jaws, each said jaw having first and second ends; (b) a set of gear teeth on said first end of each said jaw, said set of gear teeth rotatably connecting each said jaw; (c) a hinge plate having first and second opposing hinge pins, said hinge pins pivotally attaching a said first end of one of said jaws to said hinge plate about the centerline of said set of gear teeth; (d) a spindle pivotally attached to each said jaw; (e) a radially extending hanger coincident with each said spindle; and (f) an aligning link pivotally connecting said second end of each said jaw to said attached jaw spindle; and (g) a pin offset from said axis of rotation of said gear teeth pivotally connecting each said aligning link to said hinge plate.