Device for adjusting height of an armrest for chair
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 18, 2000
Grant Date -
N/A
app pub date -
Oct 20, 1998
filing date -
Feb 13, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A device for adjusting the height an armrest of a chair including a support disposed on a chair and a receiving/supporting cylinder movably engaged with a support. Extending longitudinally in a slit in the receiving/supporting cylinder is a stepped member. An engaging piece within the cylinder is adapted to be moved into and out of engagement with the stepped member. The engaging piece extends through a slit in the cylinder. Surrounding the receiving/supporting cylinder is an operating cylinder which has circumferentially spaced internal ridges. As the operating cylinder is rotated. the ridges engage the engaging piece and move it into and out of contact with the stepped member. A spiral circumferential groove is also provided in the receiving/supporting cylinder and a pin on the operating cylinder is engaged in the spiral groove whereby rotatable movement of the operating cylinder causes axial movement of the same. Tapered edges are provided on the operating cylinder and a member connected to the receiving/supporting cylinder so that as the operating cylinder is raised and lowered, the member is clamped and unclamped to the support.
First Claim
Family
International Classification(s)
Cited Art Landscape
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