US4050255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of shifting heavy and/or loaded structures
Assignee: Individual
•
Filing: 1975-07-09
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Granted: 1977-09-27
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Expires: 1995-07-09
Abstract
Abstract Apparatus for shifting heavy supporting structures relative to stationary load carrying structures comprises a plurality of parallel jack rods secured to the load carrying structure. A plurality of climbing jacks adapted to operatively engage the jack rods are secured to the heavy supporting structure. The arrangement is such that the heavy supporting structure is shifted relative to the load carrying structure when the climbing jacks are operated and advance along the jack rods while the load carrying structure remains stationary. The reactive forces caused by the operation of the climbing jacks is transferred to the load carrying structure by the jack rods. A method for shifting heavy supporting structures is also disclosed.
Inventors
- 👤 Nils Harald Ahlgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:55
CPC Classifications
E; E21; E21D; E21D11/00; E21D11/04; E21D11/10; E21D11/102
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
157 words
A method for shifting a heavy supporting structure used with a load carrying structure which remains stationary relative to shifting movements of said heavy supporting structure, a plurality of jack rods being carried by said load carrying structure and being secured against relative motion with respect thereto, said heavy supporting structure supporting said load carrying structure in a manner such that said heavy supporting structure is slideable relative to said load carrying structure, a plurality of climbing jacks being secured to said heavy supporting structure, said climbing jacks being adapted to operatively engage said jack rods; said method comprising simultaneously operating said plurality of climbing jacks so that said climbing jacks move along said jack rods thereby sliding said heavy supporting structure relative to said load carrying structure which remains stationary, the reactive force in said jack rods caused by the operation of said climbing jacks being transferred to said load carrying structure by said jack rods.
Claim 2
Independent Claim
157 words
A method for shifting a heavy supporting structure used with a load carrying structure which remains stationary relative to shifting movements of said heavy supporting structure, a plurality of jack rods being carried by said load carrying structure and being secured against relative motion with respect thereto, said heavy supporting structure supporting said load carrying structure in a manner such that said heavy supporting structure is slideable relative to said load carrying structure, a plurality of climbing jacks being secured to said heavy supporting structure, said climbing jacks being adapted to operatively engage said jack rods; said method comprising simultaneously operating said plurality of climbing jacks so that said climbing jacks move along said jack rods thereby sliding said heavy supporting structure relative to said load carrying structure which remains stationary, the reactive force in said jack rods caused by the operation of said climbing jacks being transferred to said load carrying structure by said jack rods.
Claim 3
Dependent Claim
90 words
A method of claim 1 wherein reactive forces between said heavy supporting structure and said jack rods are transferred directly to said load carrying structure, said jack rods each being made up of a plurality of detachable portions, the detachable portions of said jack rods which are behind the advancing climbing jacks are relieved of said reactive forces, said detachable end portions relieved of said reactive forces are detached from said load carrying structure and placed ahead of said climbing jacks to permit continued shifting of said heavy supporting structure.
Claim 4
Dependent Claim
59 words
A method of claim 2 wherein said load carrying structure is made up of a plurality of detachable load carrying panels which are adapted to be secured to adjacent load carrying panels, a load carrying panel being secured to the load carrying panel farthest ahead when the heavy supporting structure is shifted forwards by operation of said climbing jacks.
Claim 5
Dependent Claim
16 words
A method of claim 1 wherein said heavy supporting structure is a bracing and scaffolding structure.
Claim 6
Dependent Claim
15 words
A method of claim 1 wherein said load carrying structure is a concrete forming structure.
References Cited (Backward Citations)
US3497579A
Cited
US3548467A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |