Structure of a crutch

Details Structure of a crutch Structure of a crutch

2006-07-04

2006-07-04

Yip, Winnie (Department: 3636)

Tent, canopy, umbrella, or cane

Canes, sticks, crutches, and walking aids

Crutches

C135S073000, C135S076000, C403S396000, C403S109300

Reexamination Certificate

active

07069940

ABSTRACT:
A crutch has an adjustable crosspiece between two upright tube portions thereof, which includes a main body having tunnels lengthways extending along two end portions, two engaging pins respectively in the tunnels, springs for making the pins project out from the tunnels, two control members positioned next to and movable along the end portions of the main body, and two linearly displaceable bars on lateral sides of the main body, each of which connects a respective one of the pins to a respective one of the control members such that the pins are displaceable together with the control members; immediately after the control members are moved further away from each other, the pins will be retreated into the tunnels and disengaged from the uprights, and the crosspiece is adjustable; after the crosspiece is moved to a new position, the control members are released for the pins to engage the upright tubes.

REFERENCES:
patent: 2669244 (1954-02-01), Greene et al.
patent: 4979533 (1990-12-01), Hansen et al.
patent: 5291910 (1994-03-01), Bui et al.
patent: 5381813 (1995-01-01), Miric et al.
patent: 5402811 (1995-04-01), Weng
patent: 6079431 (2000-06-01), Su
patent: 6314977 (2001-11-01), Obitts et al.
patent: 7-328083 (1995-12-01), None
patent: 2000-237253 (2000-09-01), None

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