US3558103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scissor action hoist with components shaped so as to nest within one another
Assignee: Individual
•
Filing: 1967-09-25
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Granted: 1971-01-26
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Expires: 1987-09-25
Abstract
Abstract The invention is concerned with scissor-action hoist assemblies in which the ends of the scissor arms are secured by articulation brackets to an upper platform to be raised and a lower base, the ends of the arms preferably being connected by frame members to form at least one closed substantially rigid scissor assembly, and the arms, articulation brackets and frame members being fitted together so that in the retracted position the scissor-arm angle is very small, nil or negative and at least some of the members overlap in a common plane.
Inventors
- 👤 Alois Lodige
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:42
CPC Classifications
B; B66; B66F; B66F7/00; B66F7/06; B66F7/08; B66F7/0625; B66F7/065
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
20 words
The construction of claim 1 wherein said pivotal connection between said arms is at substantially the midpoint of said arms.
Claim 2
Dependent Claim
200 words
A scissor-action hoist construction comprising, in combination, a platform may be elevated from a base, an inside pair and an outside pair of parallel, pivotally connected scissor arms, each arm having a base end, a platform end and a platform chassiS member extending from said platform end, said outer pair being structurally connected at their base ends, one pair of arms being pivotally connected to the base at one end and including the chassis members extending from each platform end for slidably or alternatively pivotally engaging said platform, the other pair of arms slidably engaging the base and having its chassis members pivotally connected to the platform when the chassis members of the one pair of arms are slidably engaging said platform or alternatively slidably engaging said platform when the chassis members of the one paid of arms are pivotally connected with said platform , the platform end of said inside arms extending to a position short of the structural connection between said outside arms when said hoist is in a nesting position, and scissor-action lift means for driving one pair of arms in relation to the other pair of arms about said pivotal connection between said pairs of arms.
Claim 3
Dependent Claim
64 words
The construction as set forth in claim 5 wherein said scissor-action lift means include an expansive cylinder having its opposite ends connected respectively to a pivot point adjacent the pivotal connection at the end of one of said arms and a separate pivot point adjacent the pivotal connection between said arms sufficient to provide a lever arm about said pivotal connection between said arms.
Claim 4
Dependent Claim
81 words
The construction of claim 6 including an additional cylinder operative to expand in the opposite sense of said expansive cylinder, said additional expansive cylinder having one end connected to a second separate pivot point adjacent the pivotal connection between said arms and on the opposite side of said pivotal connection from said other separate pivot point and the other end of said additional expansive cylinder connected to the opposite ends of said scissor arm, to which said expansive cylinder is connected.
Claim 5
Dependent Claim
20 words
The construction of claim 5 wherein said pivotal connection between said arms is at substantially the midpoint of said arms.
Claim 6
Dependent Claim
45 words
The construction of claim 1 wherein said chassis members of said outside two arms are connected by a crossmember adjacent the pivotal or slide connection to said platform. 10 The construction of claim 5 wherein said inside arms are structurally connected at their platform ends.
Claim 7
Dependent Claim
24 words
The construction of claim 5 wherein said chassis members of said outside arms are interconnected adjacent the pivotal or slide connection to said platform.
Claim 8
Dependent Claim
16 words
The construction of claim 5 wherein said inside arms are connected together at their base ends.
References Cited (Backward Citations)
US3246876A
Cited
US3282566A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |