Chairs and seats – Collapsible chair; i.e. – relatively folding bottom – back,... – With folding armrest
Patent
1997-06-06
1998-04-07
Brown, Peter R.
Chairs and seats
Collapsible chair; i.e., relatively folding bottom, back,...
With folding armrest
297 35, A47C 400
Patent
active
057355703
ABSTRACT:
A foldable chair frame has a pair of positioning device, each of which includes a stationary pivot seat for mounting pivotally a post of a back frame portion to a respective rail of a seat frame portion of the chair frame, and a movable pivot seat mounted pivotally on the stationary pivot seat by means of a first pivot shaft that extends through an upper end of the movable pivot seat and through the stationary pivot seat. The movable pivot seat has a rear leg portion of the chair frame mounted pivotally thereon by means of a second pivot shaft that extends through a lower end thereof. The movable pivot seat further has an outer side formed with a retaining protrusion. The positioning device further includes a retaining sleeve which is formed with a stop member and which is movable along a respective one of the rear leg portions between a first position, in which the stop member engages the retaining protrusion so as to arrest relative movement between the first and second pivot shafts for retaining the foldable chair frame in an unfolded position, and a second position, in which the stop member is released from the movable pivot seat to permit relative movement between the first and second pivot shafts when the lower ends of the second pivot plates are moved forwardly relative to the upper end of the movable pivot seat to fold the chair frame.
REFERENCES:
patent: 2957516 (1960-10-01), Kubisz
patent: 2964099 (1960-12-01), Panicci
patent: 3058773 (1962-10-01), Panicci
patent: 4536026 (1985-08-01), Cornell
patent: 4772068 (1988-09-01), Gleckler et al.
patent: 4963762 (1990-10-01), Brooks
patent: 5054848 (1991-10-01), Liu
Brown Peter R.
Shin Yen Enterprise Co. Ltd.
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