Patent US1597332A successfully refreshed from Google Patents.
Patent US4576250A successfully refreshed from Google Patents.
US4576250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ladder stop
Assignee: Individual
•
Filing: 1985-06-03
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Granted: 1986-03-18
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Expires: 2005-06-03
Abstract
Abstract An improved device for preventing ladders that are positioned against structures from slipping, is disclosed. The invention includes a pointed vertical member, adapted for insertion in the ground, in snow or in other non-solid surfaces, connected to two projecting arm members that are adapted to fit about ladder legs and over ladder feet, where present, providing an inexpensive and improved means for avoiding ladder slippage.
Inventors
- 👤 Robert Marish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:38
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/42; E06C7/46
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
72 words
A device for effectively preventing ladder slippage for use with ladders that are positioned against structures, for use on non solid surfaces, consisting of a pointed anchoring spike upon which are mounted a pair of parallel arms wherein the said parallel projecting arms are formed from a single bracket welded to the back of said spike and bent downward to an angle ranging from 10° to 45° in reference to said spike.
Claim 2
Independent Claim
72 words
A device for effectively preventing ladder slippage for use with ladders that are positioned against structures, for use on non solid surfaces, consisting of a pointed anchoring spike upon which are mounted a pair of parallel arms wherein the said parallel projecting arms are formed from a single bracket welded to the back of said spike and bent downward to an angle ranging from 10° to 45° in reference to said spike.
Claim 3
Dependent Claim
17 words
The apparatus, as described in claim 1, wherein the spike and projecting arms are made of metal.
Claim 4
Independent Claim
107 words
A device for effectively preventing ladder slippage, for use with ladders that are positioned against structures, for use on nonsolid surfaces, comprising: a. A cylindrical shaped, pointed anchoring member, for insertion in a nonsolid surface; b. A cylindrical shaped handle member of a diameter larger than said anchoring member, connected to the anchoring member at said anchoring member's non pointed end; c. A pair of parallel projecting arms that are mounted on said handle member at a point near the joinder of said anchoring member and said handle member and which are adapted to receive a ladder leg whereby said ladder leg is restrained against backward slippage.
Claim 5
Independent Claim
107 words
A device for effectively preventing ladder slippage, for use with ladders that are positioned against structures, for use on nonsolid surfaces, comprising: a. A cylindrical shaped, pointed anchoring member, for insertion in a nonsolid surface; b. A cylindrical shaped handle member of a diameter larger than said anchoring member, connected to the anchoring member at said anchoring member's non pointed end; c. A pair of parallel projecting arms that are mounted on said handle member at a point near the joinder of said anchoring member and said handle member and which are adapted to receive a ladder leg whereby said ladder leg is restrained against backward slippage.
Claim 6
Dependent Claim
17 words
The apparatus described in claim 3 wherein the pointed anchoring member is 16 to 18 inches long.
Claim 7
Dependent Claim
18 words
The apparatus described in claim 3 wherein the spike and projecting arms and handle are made of metal.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-17 | 1989-09-16 | 1990-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-17 | 1993-09-16 | 1994-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-17 | 1997-09-16 | 1998-03-18 | $7700.00 | Window Closed / Lapsed |