Height adjustable crutch

Claim 1

A height adjustable crutch comprising: (a) a bow having a transverse arm crutch support and a pair of vertical hollow tubular members extending downwardly from said support, said members being brought into closer but spaced apart parallel alignment for a predetermined distance from their lower extremities and maintained in their hollow tubular condition (b) a hollow tubular carrier, said carrier being disposed in the space between the lower extremities of said hollow tubular vertical members and in abutment therewith, said carrier being orificed at spaced intervals along at least one of its sides not in abutment with said lower extremities of said hollow tubular vertical members; (c) first means securing the upper end of said carrier to each of said vertical members; (d) second means securing the lower end of said carrier to each of said vertical members, said second means comprising an element encompassing externally each of said lower extremities of said vertical members and the carrier therebetween and secured externally at diametrically opposite points of contact to each of said extremities to prevent axial movement of said element relative to each said extremity; and (e) a telescoping foot member disposed for axial displacement within and relative to said carrier, said foot member being provided with at least one laterally projecting detent, said detent being spring-biased radially outwardly for projection through any of the orifices at spaced intervals along said carrier whereby, when said detent is so projected through any such orifice, the foot member is locked against telescoping movement relative to said carrier, but such movement may be effected by pressing the spring-biased detent radially inwardly thereby to change the disposition of the foot member relative to the carrier, for locking engagement at such changed disposition by projection of the detent outwardly through a different orifice in said carrier.