Pivotable and height-adjustable chair back rest assembly and blow-molded back rest therefor
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United States of America Patent
Stats
-
Dec 10, 1996
Grant Date -
N/A
app pub date -
Jun 11, 1993
filing date -
Jun 11, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A chair is provided having a blow molded back rest and a mechanism which permits the back rest to pivot rearwardly and to be vertically adjusted. The mechanism has a carrier block slidably engaging vertical slots in a support member for vertical adjustment movement. The back rest is operatively attached to the carrier block so that the back rest can move in the vertical direction in unison with the carrier block or pivot rearwardly. The carrier block has a curved integral spring which engages the rear of the back rest to bias the back rest forward and to regulate the rearward pivoting motion as the user reclines. A handle and latch member are pivotably connected to the carrier block for movement between an engaged position in which a detent finger of the latch member acts as the stop latch or retainer which selectively engages a series of vertically spaced holes in the support member to secure the attached back rest and carrier block in the desired vertical position and a disengaged position in which the latch member and the handle are pivoted toward the front of the chair so that the detent finger is disengaged from the holes, thereby permitting the attached back rest and carrier block to be vertically adjusted.
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