Detachable chair back
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 9, 1993
Issued Date -
N/A
app pub date -
Jan 2, 1992
filing date -
Nov 30, 1990
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An improved locking mechanism for detachably securing a seat back to a chair frame is disclosed. The improved locking mechanism includes a pair of side brackets secured to opposite sides of the seat back. Linkage supported from the chair frame are provided for receiving the slide brackets thereon for supporting the seat back on the chair frame in a predetermined orientation relative to the seat member. A moveable locking arm is supported from the slide brackets and includes an offset arcuate cam surface which is adapted to engage an arcuate notch formed on the linkage when the locking arm is moved to a locked position. The mating engagement of the arcuate offset cam surface within the arcuate notch generates a line-of-contact therebetween which inhibits relative movement between the slide brackets and the upstanding links for rigidly securing seat member to the chair frame. An alternative embodiment discloses a modified link member which is adapted to create an interference engagement with the slide bracket to augment the locking action of the arcuate cam surface within the arcuate notch.
First Claim
Family
International Classification(s)
Cited Art Landscape
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