Chairs and seats – Armrest – Attachable to diverse chairs or seats; i.e. – portable
Patent
1981-08-11
1984-06-05
Zugel, Francis K.
Chairs and seats
Armrest
Attachable to diverse chairs or seats; i.e., portable
297417, A47C 754
Patent
active
044524870
ABSTRACT:
An operatory stool has a seat supported upon a post-like member extending upward from a caster-supported base, the seat having a short post extending upward from an edge of the seat and supports a horizontal curved arm for rotation about the axis of the post. Inter-engageable position control members are mounted respectively on the arm and upper end of the post and are operable for separation by raising the arm a short distance to disengage them, then rotate the arm about the axis of the post, and then release the arm to re-establish engagement of the position control members which are maintained in engagement by a compression spring. A one-way clutch also is mounted between the arm and post to permit rotation of the arm a limited distance in one direction only to augment the pivotal movement of the arm permitted by disengagement of the position control members.
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Dentsply Research & Development Corp.
Just C. Hercus
Zugel Francis K.
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