US4128228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extension ladder hoist
Assignee: Individual
•
Filing: 1977-06-09
•
Granted: 1978-12-05
•
Expires: 1997-06-09
Abstract
Abstract A support having a hoist for raising and lowering articles from one elevation to another in which one portion of the support is a ladder.
Inventors
- 👤 Frank E. Ziegelmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:53
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/12; B; B66; B66D; B66D1/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
197 words
A hoist for use with an extension ladder comprising a frame member interposed between said extension ladder and a roof at an upper extremity of said extension ladder so that said upper extremity of said extension ladder is removed from said roof and supported on said roof solely by said frame member through a U-shaped channel on said frame which overlies a rung on the ladder and further includes a locking pin extending through the channel and underlying said rung; a winch disposed on said frame, a cable disposed on said winch having a portion which extends vertically downward between said extension ladder and said roof; and means to wind said cable on said winch disposed on said frame so as to raise and lower a terminal portion of said cable from said upper extremity of said extension ladder to a lower extremity; said means to wind said cable includes a motor connected to said winch through a gear and a shaft, a brake connected to said motor to constrain said motor from motion when the brake is applied, a power source connected to said motor, control means to direct the action of the motor and brake.
Claim 2
Dependent Claim
197 words
A hoist for use with an extension ladder comprising a frame member interposed between said extension ladder and a roof at an upper extremity of said extension ladder so that said upper extremity of said extension ladder is removed from said roof and supported on said roof solely by said frame member through a U-shaped channel on said frame which overlies a rung on the ladder and further includes a locking pin extending through the channel and underlying said rung; a winch disposed on said frame, a cable disposed on said winch having a portion which extends vertically downward between said extension ladder and said roof; and means to wind said cable on said winch disposed on said frame so as to raise and lower a terminal portion of said cable from said upper extremity of said extension ladder to a lower extremity; said means to wind said cable includes a motor connected to said winch through a gear and a shaft, a brake connected to said motor to constrain said motor from motion when the brake is applied, a power source connected to said motor, control means to direct the action of the motor and brake.
Claim 3
Dependent Claim
45 words
The device of claim 1 in which said control means comprises a three position switch to regulate the motor's upward and downward motion, and a further switch which when activated allows the motor to turn, and when said further switch is deactivated energizes said brake.
Claim 4
Dependent Claim
71 words
The device of claim 1 in which said means to wind the cable comprises a pulley mounted on said frame upon which said cable rides to change the direction of travel of said rope from vertical to horizontal, gear means connected to said winch to provide a brake for said winch, and a hand crank connected to said winch to rotate said winch and thereby deploy the cable on said winch.
Claim 5
Dependent Claim
39 words
The hoist of claim 3 in which said gear means comprises a first gear connected to said winch, a second gear meshed to said first gear and a locking member engageable with said second gear to hold said winch.
Claim 6
Dependent Claim
32 words
The hoist of claim 1 in which the frame member defines a substantially triangular portion proximate to said extension ladder which terminates into a substantially linear handle portion proximate to said roof.
References Cited (Backward Citations)
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Cited
FR624193A
Cited
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Cited
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Cited
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Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-04 | 1982-06-05 | 1982-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-04 | 1986-06-05 | 1986-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-04 | 1990-06-05 | 1990-12-05 | $7700.00 | Window Closed / Lapsed |