Supports – Stand – Standard type
Patent
1985-10-07
1987-03-17
Ramirez, Ramon O.
Supports
Stand
Standard type
248125, 2481885, 248333, 403104, 403374, F16M 1100
Patent
active
046501452
ABSTRACT:
A self-locking slider mechanism for holding telescoping relatively-movable inner and outer tubular members in adjusted lengthwise position and which requires a greater force manually applied lengthwise of the members to decrease the over-all length of the members than to increase the over-all length thereof. The members can be used as a stand to provide a load-carrying capacity for the stand while still enabling adjustment of stand height with minimal effort. The slider mechanism has a body member attached to one tubular member and having an internal recess extending lengthwise thereof and opening to one side of the body with an inclined ramp plate mounted within the recess and associated with a ramp member movable therealong and which has a friction member engageable with the other tubular member. A plurality of compression springs are associated with the ramp plate and the ramp member and the ramp plate is inclined whereby a force tending to lower the height of the stand as by a load carried by the stand is reacted against relatively stiff compression springs associated with the ramp plate. A force tending to increase the over-all length of the tubular members is resisted by a lesser spring force acting on the ramp member and the ramp member moves downwardly along the inclined ramp plate to reduce the pressure applied by the friction member.
REFERENCES:
patent: 1859223 (1932-05-01), Stevenson
patent: 1919114 (1933-07-01), Ley
patent: 2291747 (1942-08-01), Neuwirth
patent: 3265346 (1966-08-01), Petrick
patent: 3941492 (1976-03-01), Meinunger
patent: 4278223 (1981-07-01), Fauteux
patent: 4329800 (1982-05-01), Shuman
patent: 4526334 (1985-07-01), Rantakari
Natzel Jerome W.
Urch Harvey M.
Wenger Jerry A.
Ramirez Ramon O.
Wenger Corporation
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