Underarm crutch

Claim 1

An underarm crutch comprising: a. a pair of side frame members spaced from each other at their upper ends and converging toward eacH other at their lower ends; b. an underarm support mounted on said upper ends of said side frame members; c. means securing said underarm support to said side frame members but allowing said side frame members to move angularly relative to each other; d. a center leg element mounted between said converging lower ends of said side frame members and extending downwardly therefrom; e. means adjustably and detachably securing said center leg element to said side frame members; f. a handgrip mounted on said side frame members above their converging lower ends; and g. means adjustably and detachably securing said handgrip to said side frame members, h. said underarm support comprising a tubular member, i. said tubular underarm member being downwardly curved along its longitudinal axis to define a concavely curved upper wall and a convexly curved lower wall, j. said concavely curved upper wall defining an underarm saddle, k. a pair of holes being formed in the convexly curved lower wall of the tubular underarm member, l. the upper ends of the side frame members projecting into said tubular underarm member through said holes, m. means attaching said upper ends of the side frame members to said tubular underarm member, n. said side frame members being formed of malleable metal tubing, o. those portions of the upper ends of the side frame members which project into said tubular underarm member being transversely deformed to enlarge their cross-sectional dimensions to the extent necessary to prevent separation of said tubular underarm member from said side frame members, p. sufficient clearance being provided for the upper ends of the side frame members in their respective holes in the tubular underarm member to enable said side frame members to engage in relative angular movement toward and away from each other and into and out of engagement with the handgrip when their converging lower ends are detached from the center leg element, q. said handgrip being provided with a pair of supporting pins extending from opposite ends thereof in coaxial relationship, and r. said side frame members being provided with a plurality of opposed, horizontally aligned holes formed therein to engage said handgrip pins, and thereby to attach the handgrip to the side frame members, s. each of said side frame members being provided with a plurality of such holes spaced vertically therein and registering horizontally with the corresponding holes of the other of said side frame members in facing relationship, t. said side frame members being angularly movable away from each other, when detached from the center leg element, to disengage the handgrip pins from one pair of horizontally registering holes, u. said side frame members being angularly movable toward each other for reattachment to said center leg element and for engagement of said handgrip pins with another pair of horizontally registering holes, v. whereby the handgrip pins are selectively engageable with said horizontally registering holes for height-adjustment of said handgrip.