Chairs and seats – Armrest – Adjustable to multiple use positions relative to bottom or back
Patent
1997-10-16
1999-08-03
Cranmer, Laurie K.
Chairs and seats
Armrest
Adjustable to multiple use positions relative to bottom or back
29741136, 29734419, 248404, 248118, A47C 754
Patent
active
059315369
ABSTRACT:
An improved adjustable armrest for use on a chair is particularly related to an adjustable armrest in connection to a pneumatically operated cylinder permitting the armrest body to be vertically lifted up by actuation of a control stick or lowered down by a manual force against the armrest body. An armrest mount having tracks defined thereon for mounting of the armrest body permits the armrest to be slidably adjusted back and forth. The armrest mount with the armrest body is secured to a housing having a vertical hole for receiving the cylinder having one end engaged with the underside of a bottom bracket which is secured to the armrest mount. The cylinder housed in a tubular sleeve is fixed at the bottom end thereof to a support bracket and is engaged with a hand operated stick at the top end so that the actuation of the control stick results in the extension of the cylinder and the armrest body accordingly. The tubular sleeve having a protrusion block and a retaining member is rotatably housed in the vertical hole with the protrusion block located in a wavy recess having a plurality of retaining cavities so as to permit the housing along with the armrest body be adjustably rotate within a certain angular range with respect to the tubular sleeve.
REFERENCES:
patent: 3788587 (1974-01-01), Stemmler
patent: 5031869 (1991-07-01), Strater et al.
patent: 5078351 (1992-01-01), Gualtieri
patent: 5382079 (1995-01-01), Wilson et al.
patent: 5407249 (1995-04-01), Bonutti
patent: 5636899 (1997-06-01), Schiff et al.
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