Patent ID: 8418704

Claim:
A power adjustable crutch assembly comprising: a support, said support being configured for positioning under an arm of a user; an upper frame coupled to and extending downwardly from said support; a lower frame slidably coupled to said upper frame; an adjustment assembly operationally coupled to said lower frame and said upper frame whereby said upper frame is adjustable to extend a selectable length from said lower frame; and a foot coupled to a bottom of said lower frame, said foot being configured for frictionally engaging a ground surface; said lower frame having a pair of spaced posts; said adjustment assembly including a motor coupled to said lower frame, said motor having a first shaft extending towards a first one of said posts; said adjustment assembly having a first bevel gear coupled to an distal end of said first shaft relative to said motor, said first bevel gear extending into said first one of said posts, said adjustment assembly including a first worm gear positioned in said first one of said posts, said first worm gear being operationally coupled to said first bevel gear; and a first nut fixedly coupled to said upper frame, said first worm gear being inserted through said first nut whereby rotation of said first worm gear in said first nut moves said upper frame relative to said lower frame; said motor having a second shaft extending towards a second one of said posts; said adjustment assembly having a second bevel gear coupled to a distal end of said second shaft relative to said motor, said second bevel gear extending into said second one of said posts, said adjustment assembly including a second worm gear positioned in said second one of said posts, said second worm gear being operationally coupled to said second bevel gear; and a second nut fixedly coupled to said upper frame, said second worm gear being inserted through said second nut whereby rotation of said second worm gear in said second nut moves said upper frame relative to said lower frame; said second one of said posts having a pair of guide grooves extending along a length of said second post; and said second nut having a central portion and a pair of tongues extending outwardly from said central portion of said second nut, each said tongue of said second nut being positioned in an associated one of said guide grooves of said second post.