Joints and connections – Articulated members – Lockable at fixed position
Patent
1981-03-31
1982-12-07
Shedd, Wayne L.
Joints and connections
Articulated members
Lockable at fixed position
403317, 403328, 248285, F16B 710
Patent
active
043624154
ABSTRACT:
An extensible and retractable strut comprising telescoping pairs of members the outer of which carries a manually operable collar that is slideable between locking and unlocking positions. The collar carries a manually-releasable pivoted locking lever having an offset end that can be received in an opening of the outer member to lock the strut in adjusted position against release when the collar is in its locking position. When the collar is in the unlocking position, the offset portion of the lever is out of registration with the opening and instead bears against the exterior of the outer member. For such circumstance the members are relatively moveable between their extended and retracted positions. A keying means carried by the collar is engageable with cooperable means on the outer member to maintain the collar in a given aligning position. A biasing spring acting on the locking lever urges the offset portion thereof continuously either into engagement with the outer surface of the outer member or else in the opening thereof. When the offset portion of the locking lever is in the opening and the strut is fully extended, the lever acts as a safety device since it extends past the end of the inner member and constitutes an abutment which positively blocks the inner member, preventing accidental collapse of the strut.
REFERENCES:
patent: 1212016 (1917-01-01), Cater
patent: 2682414 (1954-06-01), Richardson
patent: 3678439 (1972-07-01), Vetter
patent: 4289414 (1981-09-01), Recker
Lutterman Richard C.
Metz Joseph R.
Lehmann H. Gibner
Lehmann K. Gibner
Norco Inc.
Shedd Wayne L.
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