Patent US2394107A successfully refreshed from Google Patents.
US3165170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ladder extension
Assignee: A-JACK Inc
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Filing: 1963-09-09
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Granted: 1965-01-12
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Expires: 1983-09-09
Abstract
No abstract record available.
Inventors
- 👤 Jack C Blaney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:25
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/42; E06C7/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
222 words
AN ATTACHMENT FOR LADDERS COMPRISING, A HOLLOW SLEEVE MEMBER OF SUBSTANTIALLY RECTANGULAR CROSS-SECTION HAVING A PAIR OF SIDE WALLS JOINED BY END WALLS, AN OPENING FORMED IN ONE OF SIDE WALLS, A RESILIENT ARM MEMBER SECURED AT ONE END TO SAID ONE SIDE WALL, A LATCHING PLUNGER MOUNTED ON THE FREE END OF SAID RESILIENT ARM MEMBER FOR MOVEMENT INTO AND OUT OF THE OPENING IN SAID ONE SIDE WALL AND PROJECTING INTO SAID OPENING WHEN SAID ARM MEMBER IS IN ITS UNSTRESSED POSITION, AN EXTENSION MEMBER OF U-SHAPE IN CROSS SECTION SLIDABLY RECEIVED IN SAID SLEEVE MEMBER FOR MOVEMENT BETWEEN SELECTED POSITIONS IN WHICH IT PROJECTS FROM SAID SLEEVE MEMBER AND A RETRACTED POSITION IN WHICH IT IS WHOLLY RECEIVED WITHIN THE SLEEVE MEMBER, SAID EXTENSION MEMBER HAVING SPACED FLANGES CONNECTED BY AN INTEGRAL WEB, A SERIES OF OPENINGS FORMED IN THE WEB OF THE EXTENSION MEMBER ALONG THE LONGITUDINAL AXIS THEREOF, EACH OPENING OF SAID SERIES BEING SELECTIVELY ENGAGEABLE BY SAID LATCHING PLUNGER WHEN SAID RESILIENT ARM MEMBER IS IN SAID UNSTRESSED POSITION TO MAINTAIN SAID EXTENSION MEMBER IN ONE OF SAID SELECTED POSITIONS, AND A PAIR OF VERTICALLY SPACED BRACKETS MOUNTED ON SAID SLEEVE MEMBER HAVING UPWARDLY-FACING NOTCHES ADAPTED TO ENGAGE A SELECTED PAIR OF LADDER RUNGS FOR SUPPORTING ONE SIDE RAIL OF THE LADDER ON SAID EXTENSION MEMBER.
Claim 2
Dependent Claim
222 words
AN ATTACHMENT FOR LADDERS COMPRISING, A HOLLOW SLEEVE MEMBER OF SUBSTANTIALLY RECTANGULAR CROSS-SECTION HAVING A PAIR OF SIDE WALLS JOINED BY END WALLS, AN OPENING FORMED IN ONE OF SIDE WALLS, A RESILIENT ARM MEMBER SECURED AT ONE END TO SAID ONE SIDE WALL, A LATCHING PLUNGER MOUNTED ON THE FREE END OF SAID RESILIENT ARM MEMBER FOR MOVEMENT INTO AND OUT OF THE OPENING IN SAID ONE SIDE WALL AND PROJECTING INTO SAID OPENING WHEN SAID ARM MEMBER IS IN ITS UNSTRESSED POSITION, AN EXTENSION MEMBER OF U-SHAPE IN CROSS SECTION SLIDABLY RECEIVED IN SAID SLEEVE MEMBER FOR MOVEMENT BETWEEN SELECTED POSITIONS IN WHICH IT PROJECTS FROM SAID SLEEVE MEMBER AND A RETRACTED POSITION IN WHICH IT IS WHOLLY RECEIVED WITHIN THE SLEEVE MEMBER, SAID EXTENSION MEMBER HAVING SPACED FLANGES CONNECTED BY AN INTEGRAL WEB, A SERIES OF OPENINGS FORMED IN THE WEB OF THE EXTENSION MEMBER ALONG THE LONGITUDINAL AXIS THEREOF, EACH OPENING OF SAID SERIES BEING SELECTIVELY ENGAGEABLE BY SAID LATCHING PLUNGER WHEN SAID RESILIENT ARM MEMBER IS IN SAID UNSTRESSED POSITION TO MAINTAIN SAID EXTENSION MEMBER IN ONE OF SAID SELECTED POSITIONS, AND A PAIR OF VERTICALLY SPACED BRACKETS MOUNTED ON SAID SLEEVE MEMBER HAVING UPWARDLY-FACING NOTCHES ADAPTED TO ENGAGE A SELECTED PAIR OF LADDER RUNGS FOR SUPPORTING ONE SIDE RAIL OF THE LADDER ON SAID EXTENSION MEMBER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-01-12 | 1968-07-13 | 1969-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-12 | 1972-07-13 | 1973-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-12 | 1976-07-13 | 1977-01-12 | $7700.00 | Window Closed / Lapsed |