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Class Information
Number: 182/202
Name: Fire escape, ladder, or scaffold > Ladder > Supporting surface compensating means > Stile extension > Equalizing extensions
Description: Device in which two of said stile extensions are provided and are interconnected together so that movement of one of the extensions will effect movement of the other extension in opposite direction.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7597294 |
Leveling system for domestic appliances |
Oct. 6, 2009 |
| 6745870 |
Adjustable ladder support |
Jun. 8, 2004 |
| 6193013 |
Apparatus for supporting a stepladder in elevated condition |
Feb. 27, 2001 |
| 6044929 |
Ladder leveling device |
Apr. 4, 2000 |
| 5944142 |
Apparatus for elevating a stepladder |
Aug. 31, 1999 |
| 5755307 |
Hydraulic earth leveling machine |
May. 26, 1998 |
| 5273133 |
Ladder leveler |
Dec. 28, 1993 |
| 5044468 |
Ladder leveling device |
Sep. 3, 1991 |
| 5007503 |
Ladder levelling device with locking means |
Apr. 16, 1991 |
| 4770275 |
Leveller for ladders and other apparatus |
Sep. 13, 1988 |
| 4673061 |
Automatic ladder leveling apparatus |
Jun. 16, 1987 |
| 4627516 |
Self-leveling ladder construction |
Dec. 9, 1986 |
| 4497390 |
Self-adjusting ladder |
Feb. 5, 1985 |
| 4128139 |
Automatic levelling and locking ladder |
Dec. 5, 1978 |
| 4095671 |
Adjustable self-locking level support |
Jun. 20, 1978 |
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