Patent US3302750A successfully refreshed from Google Patents.
US3302750A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scaffold hoisting means
Assignee: Western Gear Machinery Co
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Filing: 1964-10-26
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Granted: 1967-02-07
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Expires: 1984-10-26
Abstract
No abstract record available.
Inventors
- 👤 Carter H Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:47
CPC Classifications
B; B66; B66C; B66C23/00; B66C23/18; B66C23/20; B66C23/205; E; E04; E04G; E04G3/00; E04G3/28; E04G3/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
HOISTING APPARATUS COMPRISING: A SUPPORTING MEMBER ADAPTED TO BE POSITIONED AT AN ELEVATED POINT RELATIVE TO A STRUCTURE, A FIRST ROPE SECURED AT ITS UPPER END OF SAID MEMBER AND DEPENDING THEREFROM, A HOISTING UNIT SECURED TO SAID FIRST ROPE FOR MOVING AN ASSOCIATED LOAD VERTICALLY ALONG THE LENGTH OF SAID FIRST ROPE, A SECOND ROPE SECURED AT ITS UPPER END TO SAID MEMBER AND DEPENDING THEREFROM, GRIPPING MEANS COACTING BETWEEN SAID LOAD AND SAID SECOND ROPE FOR GRIPPING SAID ROPE TO HOLD SAID LOAD AGAINST MOVEMENT RELATIVE TO SAID SECOND ROPE, SENSING MEANS CARRIED BY SAID FIRST ROPE FOR SENSING THE TENSION THEREIN, MEANS OPERATIVELY CONNECTING SENSING MEANS AND SAID GRIPPING MEANS FOR AUTOMATICALLY ACTUATING THE
Claim 2
Dependent Claim
117 words
HOISTING APPARATUS COMPRISING: A SUPPORTING MEMBER ADAPTED TO BE POSITIONED AT AN ELEVATED POINT RELATIVE TO A STRUCTURE, A FIRST ROPE SECURED AT ITS UPPER END OF SAID MEMBER AND DEPENDING THEREFROM, A HOISTING UNIT SECURED TO SAID FIRST ROPE FOR MOVING AN ASSOCIATED LOAD VERTICALLY ALONG THE LENGTH OF SAID FIRST ROPE, A SECOND ROPE SECURED AT ITS UPPER END TO SAID MEMBER AND DEPENDING THEREFROM, GRIPPING MEANS COACTING BETWEEN SAID LOAD AND SAID SECOND ROPE FOR GRIPPING SAID ROPE TO HOLD SAID LOAD AGAINST MOVEMENT RELATIVE TO SAID SECOND ROPE, SENSING MEANS CARRIED BY SAID FIRST ROPE FOR SENSING THE TENSION THEREIN, MEANS OPERATIVELY CONNECTING SENSING MEANS AND SAID GRIPPING MEANS FOR AUTOMATICALLY ACTUATING THE
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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) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |