Joints and connections – Interfitted members – Including discrete retainer
Patent
1995-11-02
1997-08-26
Kim, Harry C.
Joints and connections
Interfitted members
Including discrete retainer
403109, 403 31, 403DIG1, 248405, F16B 710
Patent
active
056604955
ABSTRACT:
A locking-unlocking mechanism is disclosed which is capable of realizing firm and reliable connection between pipes when a plurality of pipes telescopically arranged are extended, and capable of disconnecting the connected pipes rapidly and precisely. The locking-unlocking mechanism for a telescopic device comprising a plurality of pipes which are telescopically arranged, the locking-unlocking mechanism comprising: a bottom provided at the lower end of the lowermost pipe; a cam bar formed with a cam at its upper end, the cam bar being a rod vertically mounted on the bottom of the lowermost pipe and extending through the bottoms of the pipes other than the bottom of the lowermost pipe; a bottom provided at the lower end of each of the pipes other than the lowermost pipe, the bottom including: a cam follower disposed in tangential relationship with the cam bar and actuated by the cam, and key members connected to each other by the cam follower and each connected to a spring for biasing the cam follower against the cam bar, the key members being thereby protrudable from a side surface of the bottom; and key member receiving members provided at a position in the vicinity of the upper end of the inner surface of each of the pipes other than the uppermost pipe for receiving the key members caused to protrude from the side surface of the bottom by the action of the cam.
REFERENCES:
patent: 3474833 (1969-10-01), Garrette, Jr. et al.
patent: 3612468 (1971-10-01), Hoppl et al.
patent: 4627602 (1986-12-01), Sporck
patent: 4793197 (1988-12-01), Petrovsky
patent: 4860987 (1989-08-01), Werner
patent: 5282593 (1994-02-01), Fast
Japan Skyrobot Co., Ltd
Kim Harry C.
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