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Class Information
Number: 248/406.2
Name: Supports > Stand > Standard type > Adjustable vertically > With force multiplying means > Screw and nut > With rotation prevention disabler > Weight or load responsive
Description: Structure wherein the means for locking and/or unlocking is responsive to a weight or load or the absence thereof on the article support.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7185867 |
Vehicle seat suspension and method |
Mar. 6, 2007 |
| 7147216 |
Damper, especially for movable furniture parts |
Dec. 12, 2006 |
| 6102354 |
Long stroke, linear energy management unit |
Aug. 15, 2000 |
| 6056251 |
Adjustable-height column with depth spring action |
May. 2, 2000 |
| 5833322 |
Gas cylinder |
Nov. 10, 1998 |
| 5451024 |
Height adjusting mechanism for a swivel chair |
Sep. 19, 1995 |
| 5342012 |
Height adjusting mechanism for swivel chair |
Aug. 30, 1994 |
| 5169112 |
Electronic suspension vehicle seat |
Dec. 8, 1992 |
| 5058852 |
Vehicle seat which is adjustable in height and with automatic weight adjustment |
Oct. 22, 1991 |
| 4903930 |
Chair height adjustment mechanism |
Feb. 27, 1990 |
| 4886647 |
Supporting apparatus for semiconductor crystal rod |
Dec. 12, 1989 |
| 4872635 |
Slip connector for weight actuated height adjustors |
Oct. 10, 1989 |
| 4828212 |
Means for adjusting the vertical height of the seat of a chair |
May. 9, 1989 |
| 4720071 |
Split nut mechanical height adjusting mechanism for chair |
Jan. 19, 1988 |
| 4709894 |
Slip connector for weight actuated height adjustors |
Dec. 1, 1987 |
| 4693442 |
Variable length columns |
Sep. 15, 1987 |
| 4598892 |
Mechanical chair-height control mechanism |
Jul. 8, 1986 |
| 4540148 |
Chair height adjustment mechanism |
Sep. 10, 1985 |
| 4494721 |
Seat adjustment mechanism for a chair |
Jan. 22, 1985 |
| 4479627 |
Chair height adjustment mechanism |
Oct. 30, 1984 |
| 4440372 |
Bellows mounting arrangement for swivel chair |
Apr. 3, 1984 |
| 4394001 |
Height-adjusting mechanism for chair seat |
Jul. 19, 1983 |
| 4379540 |
Adjustable support devices for swivel chairs |
Apr. 12, 1983 |
| 4324382 |
Height adjustable chair base |
Apr. 13, 1982 |
| 4315613 |
Mechanical height adjustment mechanism for chairs |
Feb. 16, 1982 |
| 4285488 |
Height adjusting mechanism for a swivel chair |
Aug. 25, 1981 |
| 4261540 |
Height adjustable chair base |
Apr. 14, 1981 |
| 4234152 |
Seats for children |
Nov. 18, 1980 |
| 4026509 |
Adjustable standard for swivel chair |
May. 31, 1977 |
| 3991965 |
Chair height adjusting mechanism |
Nov. 16, 1976 |
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