Patent US3713510A successfully refreshed from Google Patents.
US3713510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ladder push out apparatus
Assignee: Individual
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Filing: 1971-03-10
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Granted: 1973-01-30
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Expires: 1991-03-10
Abstract
Abstract A push-out apparatus adapted to be attached to a ladder for moving the ladder to a selected adjusted position relative to a surface against which the ladder is supported. The push-out apparatus includes a ladder attachment assembly having releasable connecting means for securing the assembly in a set position on the ladder and for permitting ready removal of the assembly from the ladder. The push-out apparatus includes push-out means supported on the attachment assembly for movement relative thereto and having extending abutment means detailed for contacting the supporting surface against which the ladder is operating. Manual control adjusting means is operatively connected between the push-out means and the ladder attachment assembly whereby the abutment means can be moved to a selected one of a number os set positions relative to the attached assembly. The abutment stop means includes a pair of laterally spaced and laterally adjustable bumper elements detailed for contacting the surface of a building at a number of laterally spaced positions thereon. The abutment stop means is removably connected to the ladder attachment assembly and can be removed therefrom for ready attachment to a second support assembly which can be secured to the ladder in order that the abutment stop means can be used on the ladder without the use of the push-out means.
Inventors
- 👤 Dell R O
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:05
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/48
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
301 words
A push-out apparatus adapted to be supported on a ladder for moving said ladder to a selected adjusted position relative to a supporting surface comprising, in combination, a ladder attachment assembly, said assembly including releasable mounting means for securing said assembly in a set position on said ladder and for permitting ready removal of said assembly from said ladder and ladder push-out means supported on said attachment assembly, said push-out means including abutment means adapted to contact a supporting surface against which a ladder is operating, said abutment means including support means movably mounted on said attachment assembly and wherein controlled adjustment means is operatively associated with said abutment means and operable for advancing said abutment means to a selected one of a number of set positions relative to said attachment assembly, said abutment means including at least two bumper elements adapted to contact said supporting surface against which a ladder is operating and said bumper elements being supported on said abutment means for movement to a selected one of a number of laterally spaced positions whereby said bumper elements will contact said supporting surface at selected adjusted positions said abutment means including an elongated supporting bar and each of said bumper elements including a sleeve element slidably received on said elongated bar and having locking means for locking said sleeve in a desired set position along the length of said bar, said adjustable sleeves each including a pivotal supporting axis for connecting said sleeves to said bumper elements, whereby said bumper elements can be pivotally adjusted relative to said elongated bar and including means for locking said bumper elements in an angular set position, and wherein said elongated bar includes limit stop means for stopping and maintaining said bumper elements in a limit set position relative to said elongated bar.
Claim 2
Dependent Claim
301 words
A push-out apparatus adapted to be supported on a ladder for moving said ladder to a selected adjusted position relative to a supporting surface comprising, in combination, a ladder attachment assembly, said assembly including releasable mounting means for securing said assembly in a set position on said ladder and for permitting ready removal of said assembly from said ladder and ladder push-out means supported on said attachment assembly, said push-out means including abutment means adapted to contact a supporting surface against which a ladder is operating, said abutment means including support means movably mounted on said attachment assembly and wherein controlled adjustment means is operatively associated with said abutment means and operable for advancing said abutment means to a selected one of a number of set positions relative to said attachment assembly, said abutment means including at least two bumper elements adapted to contact said supporting surface against which a ladder is operating and said bumper elements being supported on said abutment means for movement to a selected one of a number of laterally spaced positions whereby said bumper elements will contact said supporting surface at selected adjusted positions said abutment means including an elongated supporting bar and each of said bumper elements including a sleeve element slidably received on said elongated bar and having locking means for locking said sleeve in a desired set position along the length of said bar, said adjustable sleeves each including a pivotal supporting axis for connecting said sleeves to said bumper elements, whereby said bumper elements can be pivotally adjusted relative to said elongated bar and including means for locking said bumper elements in an angular set position, and wherein said elongated bar includes limit stop means for stopping and maintaining said bumper elements in a limit set position relative to said elongated bar.
Claim 3
Dependent Claim
301 words
A push-out apparatus adapted to be supported on a ladder for moving said ladder to a selected adjusted position relative to a supporting surface comprising, in combination, a ladder attachment assembly, said assembly including releasable mounting means for securing said assembly in a set position on said ladder and for permitting ready removal of said assembly from said ladder and ladder push-out means supported on said attachment assembly, said push-out means including abutment means adapted to contact a supporting surface against which a ladder is operating, said abutment means including support means movably mounted on said attachment assembly and wherein controlled adjustment means is operatively associated with said abutment means and operable for advancing said abutment means to a selected one of a number of set positions relative to said attachment assembly, said abutment means including at least two bumper elements adapted to contact said supporting surface against which a ladder is operating and said bumper elements being supported on said abutment means for movement to a selected one of a number of laterally spaced positions whereby said bumper elements will contact said supporting surface at selected adjusted positions said abutment means including an elongated supporting bar and each of said bumper elements including a sleeve element slidably received on said elongated bar and having locking means for locking said sleeve in a desired set position along the length of said bar, said adjustable sleeves each including a pivotal supporting axis for connecting said sleeves to said bumper elements, whereby said bumper elements can be pivotally adjusted relative to said elongated bar and including means for locking said bumper elements in an angular set position, and wherein said elongated bar includes limit stop means for stopping and maintaining said bumper elements in a limit set position relative to said elongated bar.
Claim 4
Dependent Claim
301 words
A push-out apparatus adapted to be supported on a ladder for moving said ladder to a selected adjusted position relative to a supporting surface comprising, in combination, a ladder attachment assembly, said assembly including releasable mounting means for securing said assembly in a set position on said ladder and for permitting ready removal of said assembly from said ladder and ladder push-out means supported on said attachment assembly, said push-out means including abutment means adapted to contact a supporting surface against which a ladder is operating, said abutment means including support means movably mounted on said attachment assembly and wherein controlled adjustment means is operatively associated with said abutment means and operable for advancing said abutment means to a selected one of a number of set positions relative to said attachment assembly, said abutment means including at least two bumper elements adapted to contact said supporting surface against which a ladder is operating and said bumper elements being supported on said abutment means for movement to a selected one of a number of laterally spaced positions whereby said bumper elements will contact said supporting surface at selected adjusted positions said abutment means including an elongated supporting bar and each of said bumper elements including a sleeve element slidably received on said elongated bar and having locking means for locking said sleeve in a desired set position along the length of said bar, said adjustable sleeves each including a pivotal supporting axis for connecting said sleeves to said bumper elements, whereby said bumper elements can be pivotally adjusted relative to said elongated bar and including means for locking said bumper elements in an angular set position, and wherein said elongated bar includes limit stop means for stopping and maintaining said bumper elements in a limit set position relative to said elongated bar.
Claim 5
Dependent Claim
36 words
A push-out apparatus as described in claim 1 further characterized in that said control adjustment means includes a rotatable hand operated crank member detailed for effecting movement of said abutment means to a desired set position.
Claim 6
Dependent Claim
84 words
A push-out apparatus as described in claim 5 further characterized in that said abutment means includes at least one elongated leg member with said attachment assembly including a sleeve means detailed for slidably receiving said elongated leg member, said control adjustment means includes means for advancing said leg member through said sleeve support means to said selected set positions and wherein said adjustment means includes ratchet controlled locking means for holding said leg member in a set position relative to said sleeve support means.
Claim 7
Dependent Claim
43 words
A push-out apparatus as described in claim 3 further characterized in that said abutment means includes at least two elongated leg supporting members and wherein said attachment assembly includes at least two supporting sleeves detailed for slidably receiving said two leg support members.
Claim 8
Dependent Claim
67 words
A push-out apparatus as described in claim 4 further characterized in that said control adjustment means includes a rotatably mounted winch means supported on said attachment assembly and including a flexible line means operatively connected to said abutment means leg support members whereby rotary movement of said winch means will reduce the effective length of said flexible element to advance said supporting legs through said sleeve members.
Claim 9
Dependent Claim
62 words
A push-out apparatus as described in claim 5 further characterized in that said releasable ratchet locking means is detailed for maintaining said supporting leg in a set position relative to said sleeves and wherein said releasable ratchet means includes means for releasing said supporting leg from a set position to allow the legs to be freely slidable relative to said sleeve elements.
Claim 10
Dependent Claim
198 words
A push-out apparatus adapted to be supported on a ladder for moving said ladder to a selected position relative to supporting surface comprising in combination, a ladder attachment assembly including releasable mounting means for securing said assembly in a set position on a ladder, said mounting means including hook means for engaging a selected rung of the ladder, ladder push-out means supported on said assembly and including abutment means adapted to contact a supporting surface, said abutment means including support means movably mounted on said attachment assembly, controlled adjustment means mounted on said assembly and operable for advancing said abutment means to a selected position, said push-out means being pivotally mounted on said assembly for movement between an extended position wherein said abutment means is supported in angular relationship relative to the longitudinal axis of the ladder and a retracted inoperable position wherein said abutment means is disposed substantially parallel to said axis, and releasable latching means for maintaining said push-out means in either said extended or retracted position, said latching means including a lost motion connecting means for permitting limited relative movement between said attachment assembly and said abutment means when the latter is in extended position.
Claim 11
Dependent Claim
198 words
A push-out apparatus adapted to be supported on a ladder for moving said ladder to a selected position relative to supporting surface comprising in combination, a ladder attachment assembly including releasable mounting means for securing said assembly in a set position on a ladder, said mounting means including hook means for engaging a selected rung of the ladder, ladder push-out means supported on said assembly and including abutment means adapted to contact a supporting surface, said abutment means including support means movably mounted on said attachment assembly, controlled adjustment means mounted on said assembly and operable for advancing said abutment means to a selected position, said push-out means being pivotally mounted on said assembly for movement between an extended position wherein said abutment means is supported in angular relationship relative to the longitudinal axis of the ladder and a retracted inoperable position wherein said abutment means is disposed substantially parallel to said axis, and releasable latching means for maintaining said push-out means in either said extended or retracted position, said latching means including a lost motion connecting means for permitting limited relative movement between said attachment assembly and said abutment means when the latter is in extended position.
Claim 12
Dependent Claim
36 words
A push-out apparatus as in claim 7 wherein the means for advancing said abutment means includes a winch mounted on said attachment assembly and a cable attached to said support means and wound around said winch.
Claim 13
Dependent Claim
40 words
A push-out apparatus as described in claim 7 further characterized in that said ladder attachment assembly includes adjusting means which will permit lateral adjustment of said attachment assembly to a number of laterally selected positions relative to a supporting ladder.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |