Umbrella rod structure of multiple tubes

Details Umbrella rod structure of multiple tubes Umbrella rod structure of multiple tubes

1996-04-18

1997-12-30

Kim, Harry C.

Joints and connections

Interfitted members

Including discrete retainer

403109, 135 251, 135 254, A45B 1900, F16B 710

Patent

active

057021988

ABSTRACT:
The present invention relates to an umbrella rod structure having multiple tubes. The rod comprises at least two tubes, such as an outer tube and an inner tube, which have arched grooves and positioning holes, and a V-shaped stopper having a projection on one end disposed in the inner tube to extend from positioning holes of both tubes. The arched contacts between the grooves of both tubes and the engagement of the projection and the positioning holes make the rod be secure and firm when it is stretched while the structure of the invention is simple and the manufacturing and assembling is easy and convenience.

REFERENCES:
patent: 4858633 (1989-08-01), Yang
patent: 5287869 (1994-02-01), Wu
patent: 5387048 (1995-02-01), Kuo

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