Crutch

Details Crutch Crutch

2000-06-22

2001-07-03

Canfield, Robert (Department: 3635)

Tent, canopy, umbrella, or cane

Canes, sticks, crutches, and walking aids

Crutches

C135S068000, C135S075000

Reexamination Certificate

active

06253776

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to a crutch. More particularly, the present invention relates to a crutch for facilitiating a user.
Referring to
FIG. 1
, a conventional crutch
1
′ has a pad
11
′, two bow rods
12
′ connected to the pad
11
′ downward, a handpiece
13
′ connected to the bow rods
12
′ transversely, a pipe
14
′ clamped by the lower portions of two bow rods
12
′, an extensible rod
16
′ inserted beneath the pipe
14
′, a tip cushion
17
′ receiving the lower end of the extensible rod
16
′, and a mount
15
′ confining the lower ends of the pipe
14
′ and the bow rods
12
′. A plug
142
′ is disposed on the upper end of the pipe
14
′. Each bow rod
12
′ has a plurality of positioning holes
120
′. A bolt
131
′ and a butterfly nut
132
′ fasten the handpiece
13
′ and two bow rods
12
′ together. The pipe
14
′ has a plurality of adjusting holes
140
′. A protrusion
141
′ is disposed in the pipe
14
′ and inserted in one of the adjusting holes
140
′. However, the conventional crutch
1
′ has a plurality of pins and rivets in order to assemble the crutch
1
′. Thus it is very difficult to assemble the crutch
1
′ for the ordinary users. Furthermore, the strength of each bow rod
12
′ is weakened.
SUMMARY OF THE INVENTION
An object of the present invention is to provide an assembled crutch which can reinforce lower portions of two bow rods.
Another object of the present invention is to provide a crutch which can facilitate the user.
In accordance with a first preferred embodiment, a crutch comprises a pad, two bow rods connected to the pad downward, a handpiece connected to the bow rods transversely, a bolt and a butterfly nut fastening the handpiece and the bow rods together, a spring having two ends inserted through the bow rods, a sleeve having a through hole receiving lower portions of the bow rods, a pipe receiving the lower portions of the bow rods, the pipe having a taper end and a plurality of through apertures, and a tip cushion receiving the taper end of the pipe.
In accordance with a second preferred embodiment, a crutch comprises a pad, two bow rods connected to the pad downward, a handpiece connected to the bow rods transversely, a bolt and a butterfly nut fastening the handpiece and the bow rods together, two springs inserted in the bow rods respectively, a sleeve having two through holes receiving lower portions of the bow rods, a pipe receiving the lower portions of the bow rods, the pipe having a plurality of through apertures, and a tip cushion receiving the pipe. A fastener fastens two bow rods together. The fastener has an end protrusion.


REFERENCES:
patent: 815368 (1906-03-01), Morse
patent: 1870921 (1932-08-01), Murka
patent: 2366406 (1945-01-01), Invidiato
patent: 2856943 (1958-10-01), Sparlin
patent: 4865065 (1989-09-01), Chen
patent: 5402811 (1995-04-01), Weng
patent: 5605170 (1997-02-01), Wenf

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