Patent US5476153A successfully refreshed from Google Patents.
US5476153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ladder leveling apparatus
Assignee: Individual
•
Filing: 1994-03-25
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Granted: 1995-12-19
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Expires: 2014-03-25
Abstract
Abstract An apparatus for leveling a ladder having at least two vertical supports has a vertical support gripping member that has a support wall and a gripping wall attached to the support wall. A plurality of gripping wall teeth is on the gripping wall. A tightening member wall is attached to the support wall and opposes the gripping wall. A first vertical support retaining member is attached to the gripping wall. A second vertical support retaining member is attached to the tightening member wall. The guide channel is formed by the support wall, the gripping wall, the tightening member wall, the first vertical support retaining member and the second vertical support retaining member. One of the vertical support members is slidingly engaged within the guide channel. A threadingly adjustable tightening member, threadingly engaged in a threaded port in the vertical support, releasingly abuts a first outer surface of one of the vertical supports. There is a plurality of vertical support wall teeth on a second outer wall of the vertical supports. The vertical support wall teeth releasably interface with the gripping wall teeth.
Inventors
- 👤 Craig A. Dickerson
- 👤 Julie R. Dickerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:49
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/42; E06C7/44
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
178 words
An apparatus for leveling a ladder having at least two vertical supports, the apparatus comprising: (a) a vertical support gripping member comprising: a support wall; a gripping wall attached to the support wall; a tightening member wall attached to the support wall and opposing the gripping wall; a guide channel formed by the support wall, the gripping wall and the tightening member wall; one of the vertical support members slidingly engaged within the guide channel; and a threadingly adjustable tightening member, threadingly engaged in a threaded port in the vertical support gripping member, releasingly abutting a first outer surface of the vertical supports; the tightening member comprising: an abutment plate; a threaded bolt having one end pivotally attached to the abutment plate; a locking nut on the threaded bolt; a gripping knob attached to another end of the threaded bolt; and a knurled surface on the gripping knob; (b) a plurality of vertical support wall teeth on a second outer surface of the vertical supports; and (c) the vertical support wall teeth releasably interfacing with the gripping wall.
Claim 2
Independent Claim
178 words
An apparatus for leveling a ladder having at least two vertical supports, the apparatus comprising: (a) a vertical support gripping member comprising: a support wall; a gripping wall attached to the support wall; a tightening member wall attached to the support wall and opposing the gripping wall; a guide channel formed by the support wall, the gripping wall and the tightening member wall; one of the vertical support members slidingly engaged within the guide channel; and a threadingly adjustable tightening member, threadingly engaged in a threaded port in the vertical support gripping member, releasingly abutting a first outer surface of the vertical supports; the tightening member comprising: an abutment plate; a threaded bolt having one end pivotally attached to the abutment plate; a locking nut on the threaded bolt; a gripping knob attached to another end of the threaded bolt; and a knurled surface on the gripping knob; (b) a plurality of vertical support wall teeth on a second outer surface of the vertical supports; and (c) the vertical support wall teeth releasably interfacing with the gripping wall.
Claim 3
Independent Claim
213 words
An apparatus for leveling a ladder having at least two vertical supports, the apparatus comprising: (a) a vertical support gripping member comprising: a support wall; a gripping wall attached to the support wall; a tightening member wall attached to the support wall and opposing the gripping wall; a first vertical support retaining member attached to the gripping wall; a second vertical support retaining member attached to the tightening member wall; a guide channel formed by the support wall, the gripping wall, the tightening member wall, the first vertical support retaining member and the second vertical support retaining member; one of the vertical support members slidingly engaged within the guide channel; and a threadingly adjustable tightening member, threadingly engaged in a threaded port in the vertical support gripping member, releasingly abutting a first outer surface of the vertical supports; the tightening member comprising: an abutment plate; a threaded bolt having one end pivotally attached to the abutment plate; a locking nut on the threaded bolt; a gripping knob attached to another end of the threaded bolt; and a knurled surface on the gripping knob; (b) a plurality of vertical support wall teeth on a second outer surface of the vertical supports; and (c) the vertical support wall teeth releasably interfacing with the gripping wall.
Claim 4
Independent Claim
213 words
An apparatus for leveling a ladder having at least two vertical supports, the apparatus comprising: (a) a vertical support gripping member comprising: a support wall; a gripping wall attached to the support wall; a tightening member wall attached to the support wall and opposing the gripping wall; a first vertical support retaining member attached to the gripping wall; a second vertical support retaining member attached to the tightening member wall; a guide channel formed by the support wall, the gripping wall, the tightening member wall, the first vertical support retaining member and the second vertical support retaining member; one of the vertical support members slidingly engaged within the guide channel; and a threadingly adjustable tightening member, threadingly engaged in a threaded port in the vertical support gripping member, releasingly abutting a first outer surface of the vertical supports; the tightening member comprising: an abutment plate; a threaded bolt having one end pivotally attached to the abutment plate; a locking nut on the threaded bolt; a gripping knob attached to another end of the threaded bolt; and a knurled surface on the gripping knob; (b) a plurality of vertical support wall teeth on a second outer surface of the vertical supports; and (c) the vertical support wall teeth releasably interfacing with the gripping wall.
Claim 5
Independent Claim
224 words
An apparatus for leveling a ladder having at least two vertical supports, the apparatus comprising: (a) a vertical support gripping member comprising: a support wall; a gripping wall attached to the support wall; a plurality of gripping wall teeth on the gripping wall; a tightening member wall attached to the support wall and opposing the gripping wall; a first vertical support retaining member attached to the gripping wall; a second vertical support retaining member attached to the tightening member wall; a guide channel formed by the support wall, the gripping wall, the tightening member wall, the first vertical support retaining member and the second vertical support retaining member; one of the vertical support members slidingly engaged within the guide channel; and a threadingly adjustable tightening member, threadingly engaged in a threaded port in the vertical support gripping member, releasingly abutting a first outer surface of the vertical supports; the tightening member comprising: an abutment plate; a threaded bolt having one end pivotally attached to the abutment plate; a locking nut on the threaded bolt; a gripping knob attached to another end of the threaded bolt; and a knurled surface on the gripping knob: (b) a plurality of vertical support wall teeth on a second outer wall of the vertical supports; and (c) the vertical support wall teeth releasably interfacing with the gripping wall teeth.
Claim 6
Independent Claim
224 words
An apparatus for leveling a ladder having at least two vertical supports, the apparatus comprising: (a) a vertical support gripping member comprising: a support wall; a gripping wall attached to the support wall; a plurality of gripping wall teeth on the gripping wall; a tightening member wall attached to the support wall and opposing the gripping wall; a first vertical support retaining member attached to the gripping wall; a second vertical support retaining member attached to the tightening member wall; a guide channel formed by the support wall, the gripping wall, the tightening member wall, the first vertical support retaining member and the second vertical support retaining member; one of the vertical support members slidingly engaged within the guide channel; and a threadingly adjustable tightening member, threadingly engaged in a threaded port in the vertical support gripping member, releasingly abutting a first outer surface of the vertical supports; the tightening member comprising: an abutment plate; a threaded bolt having one end pivotally attached to the abutment plate; a locking nut on the threaded bolt; a gripping knob attached to another end of the threaded bolt; and a knurled surface on the gripping knob: (b) a plurality of vertical support wall teeth on a second outer wall of the vertical supports; and (c) the vertical support wall teeth releasably interfacing with the gripping wall teeth.
Claim 7
Dependent Claim
36 words
An apparatus as described in claim 3 further comprising: (a) a foot pivotally connected to the distal end of the vertical support gripping member; (b) a resilient pad attached to the distal end of the foot.
References Cited (Backward Citations)
US898973A
Cited
US970425A
Cited
US971997A
Cited
US1376777A
Cited
AU112531A
Cited
US2147052A
Cited
DE1554684A1
Cited
US3527321A
Cited
US3948352A
Cited
US4423797A
Cited
US4607726A
Cited
US4606432A
Cited
US4802471A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-12-18 | 1999-06-19 | 1999-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-12-18 | 2003-06-19 | 2003-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-12-18 | 2007-06-19 | 2007-12-19 | $7700.00 | Window Closed / Lapsed |