US3792787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of lifting a heavy component for sensitive engagement with another
Assignee: United States Department of the Army
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Filing: 1973-06-19
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Granted: 1974-02-19
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Expires: 1993-06-19
Abstract
Abstract The method of lifting a heavy first component for sensitive engagement with a second component wherein a spring-loaded device is engaged between a mechanical lifting means and the first component to neutralize the weight thereof when lifted, the reduced weight of the lifted component is moved manually into engagement with the second component and thereafter, any interference during completion of the engagement is manually sensed and corrected by manual adjustment of the vertical position of the first component relative to the mechanical lifting means.
Inventors
- 👤 W Maloney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:48
CPC Classifications
B; B66; B66C; B66C13/00; B66C13/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49895
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
183 words
A method for mechanically hoisting a first member into position for subsequent horizontal movement into mating engagement with a second member comprising the steps of, inserting balancing springs between a mechanical hoist and said first member to neutralize the weight thereof and establish a zero equilibrium position relative to said mechanical hoist as said first member is lifted into the vicinity of said second member, manually positioning said first member into alignment with said second member, thereafter continuing to manually adjust the vertical position of said first member in order to maintain the alignment thereof with said second member during the completion of the required engagement therebetween, selectively actuating said hoist relative to said first member to restore said springs to said position of zero equilibrium without disturbing the alignment between said first and second members whereby the force required to manually adjust said first member relative to said second member can be kept below a given level, and continuously buffering the displacement of said balancing springs to eliminate surging thereof during the entire relative movement between said first member and said hoist.
Claim 2
Independent Claim
183 words
A method for mechanically hoisting a first member into position for subsequent horizontal movement into mating engagement with a second member comprising the steps of, inserting balancing springs between a mechanical hoist and said first member to neutralize the weight thereof and establish a zero equilibrium position relative to said mechanical hoist as said first member is lifted into the vicinity of said second member, manually positioning said first member into alignment with said second member, thereafter continuing to manually adjust the vertical position of said first member in order to maintain the alignment thereof with said second member during the completion of the required engagement therebetween, selectively actuating said hoist relative to said first member to restore said springs to said position of zero equilibrium without disturbing the alignment between said first and second members whereby the force required to manually adjust said first member relative to said second member can be kept below a given level, and continuously buffering the displacement of said balancing springs to eliminate surging thereof during the entire relative movement between said first member and said hoist.
References Cited (Backward Citations)
US3552720A
Cited
US3621756A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |