Supports – Stand – Standard type
Patent
1985-05-06
1987-02-03
Britts, Ramon S.
Supports
Stand
Standard type
248423, F16M 1128
Patent
active
046404848
ABSTRACT:
A support column unit for an adjustable-height chair and the like comprises upper and lower telescoping tubular members, a piston-and-cylinder type pneumatic spring located coaxially within the tubular members and having its cylinder member secured to the lower tubular member, and a gravity dependent locking mechanism for locking the piston rod member of the pneumatic spring to the upper tubular member when the support column is upright and for releasing the piston rod member when the support column is inverted. The locking mechanism comprises a lock body retained within the upper tubular member and having a bore sized and positioned to permit sliding axial movement of the piston rod member therein. The lock body has one or more cavities, each one in communication with the bore and containing a locking member. The cavities and the locking members are sized and shaped such that when the support column is upright, each locking member falls to a position in which a portion thereof protrudes into the bore, and when the column is inverted, each locking member falls to a position in which it is fully retracted from the bore. The piston rod member has an annular retaining groove shaped to engage the portions of the locking members that protrude into the bore to achieve locking of the piston rod member to the lock body when the column is upright.
REFERENCES:
patent: 1620913 (1927-03-01), Orwig
patent: 2961260 (1960-11-01), Newlin
patent: 3201079 (1965-08-01), Doetsch
patent: 3285207 (1966-12-01), Hagen
patent: 3741514 (1973-06-01), Snurr
patent: 3788587 (1974-01-01), Stemmler
patent: 4580749 (1986-04-01), Howard
Lamond Lee T.
Staton Richard D.
Britts Ramon S.
Chotkowski Karen J.
Fichtel & Sachs Industries
LandOfFree
Support column with gravity dependent retention means does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Support column with gravity dependent retention means, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Support column with gravity dependent retention means will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1088399