Patent US3844526A successfully refreshed from Google Patents.
US3844526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vertical shaft form with cammed stripping units
Assignee: Wilian Holding Co
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Filing: 1973-02-15
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Granted: 1974-10-29
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Expires: 1993-02-15
Abstract
Abstract A concrete form assembly for constructing a section of an elevator shaft or the like including an outer form structure and an inner form structure positioned within the outer form structure. The inner or trapped form structure is comprised of vertically disposed side walls and end walls and at least a pair of diagonally opposite stripping corner sections, each of which coacts with associated manually actuated stripping units for stripping the inner form structure from the completed shaft section. Each stripping corner section is movably interconnected with an adjacent end wall and side wall for relative limited horizontal transverse and lateral movements to a concrete pouring position, wherein the concrete engaging surfaces of a stripping corner section are located in planes common to the concrete engaging surfaces of an adjacent end wall and side wall; and to a position for removing the inner form structure wherein the end walls and side walls and corner sections are stripped from the completed shaft section so that the inner form structure can be removed as an integrated unit from the shaft section. Such movements of the stripping corner sections are accomplished by the stripper units which are rotatably mounted on the end walls and side walls for coacting operation with the corner sections.
Inventors
- 👤 L Mccracken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:49
CPC Classifications
B; B28; B28B; B28B7/00; B28B7/28; B28B7/30
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
415 words
A metal form assembly for constructing a concrete shaft section comprising: a. an outer form structure, b. an inner form structure located in a spaced relation within said outer form structure to provide for the pouring of a concrete material therebetween to form said shaft section; c. said inner form structure including vertically disposed side walls and end walls and a pair of diagonally opposite stripping corner sections, each of which is arranged between the adjacent ends of one of said end walls and one of said side walls, and each of which stripping corner sections has a body member of an angular shape in transverse cross section with vertically disposed side edges, d. first lateral projections corresponding to and extended inwardly from said one end wall and said one side wall at the ends thereof adjacent a stripping corner section, e. second lateral projections corresponding to said first lateral projections extended inwardly from the body member of a stripping corner section adjacent a vertically disposed side edge thereof at positions spaced from and opposite said first lateral projections, f. means movably interconnecting opposite ones of said first and second lateral projections to limit the maximum relation therebetween, and g. a manually actuated stripping tool unit rotatably mounted on each of said first lateral projections including a spacer member and a cam member, said stripping tool unit rotatable to a concrete pouring position for said inner form structure wherein said spacer member is located between opposite ones of said first and second lateral projections to space said projections apart the maximum distance defined by said interconnecting means, and wherein said cam member is engageable with a corresponding second lateral projection on said body member to move a vertical edge thereof into abutting flush engagement with the adjacent end of a corresponding end wall or side wall, h. said stripping tool unit, on setting of the formed concrete shaft section, rotatable to an initial stripping position wherein said spacer member is retracted from between opposite ones of said first and second lateral projections, and said cam member is in bearing engagement with a corresponding second lateral projection to concurrently hold a stripping corner section in bearing engagement with the formed shaft section and to force said end walls and side walls out of engagement with the formed shaft section whereby to provide for the movement of the adjacent ends of corresponding end walls and side walls inwardly of the body member of a stripping corner section.
Claim 2
Dependent Claim
415 words
A metal form assembly for constructing a concrete shaft section comprising: a. an outer form structure, b. an inner form structure located in a spaced relation within said outer form structure to provide for the pouring of a concrete material therebetween to form said shaft section; c. said inner form structure including vertically disposed side walls and end walls and a pair of diagonally opposite stripping corner sections, each of which is arranged between the adjacent ends of one of said end walls and one of said side walls, and each of which stripping corner sections has a body member of an angular shape in transverse cross section with vertically disposed side edges, d. first lateral projections corresponding to and extended inwardly from said one end wall and said one side wall at the ends thereof adjacent a stripping corner section, e. second lateral projections corresponding to said first lateral projections extended inwardly from the body member of a stripping corner section adjacent a vertically disposed side edge thereof at positions spaced from and opposite said first lateral projections, f. means movably interconnecting opposite ones of said first and second lateral projections to limit the maximum relation therebetween, and g. a manually actuated stripping tool unit rotatably mounted on each of said first lateral projections including a spacer member and a cam member, said stripping tool unit rotatable to a concrete pouring position for said inner form structure wherein said spacer member is located between opposite ones of said first and second lateral projections to space said projections apart the maximum distance defined by said interconnecting means, and wherein said cam member is engageable with a corresponding second lateral projection on said body member to move a vertical edge thereof into abutting flush engagement with the adjacent end of a corresponding end wall or side wall, h. said stripping tool unit, on setting of the formed concrete shaft section, rotatable to an initial stripping position wherein said spacer member is retracted from between opposite ones of said first and second lateral projections, and said cam member is in bearing engagement with a corresponding second lateral projection to concurrently hold a stripping corner section in bearing engagement with the formed shaft section and to force said end walls and side walls out of engagement with the formed shaft section whereby to provide for the movement of the adjacent ends of corresponding end walls and side walls inwardly of the body member of a stripping corner section.
Claim 3
Dependent Claim
230 words
A metal form assembly for constructing a concrete shaft section comprising: a. an outer form structure, b. an inner form structure positioned in a spaced relation within said outer form structure including vertically disposed side walls and end walls and at least a pair of diagonally opposite stripping corner sections, each corner section having a body member with vertically disposed side edges, c. means movably interconnecting each corner section with an adjacent side wall and end wall for limited relative lateral and transverse movements, d. a plurality of coacting means on a corner section and on the side wall and end wall adjacent thereto operable to move a corner section into and out of a position wherein said vertically disposed side edges are in abutting engagement with a corresponding adjacent side wall and end wall, and e. means for releasably locking a corner section in said position against movement relative to an adjacent side wall and end wall, f. each of said coacting means including a pair of rotatable operating members rotatable together about a common axis, one of said operating members providing relative transverse movement between a corner section and adjacent end wall and side wall into said position, and the other of said operating members constituting a spacer member for holding a corner section in said position against lateral movement toward an adjacent side wall and end wall.
Claim 4
Dependent Claim
230 words
A metal form assembly for constructing a concrete shaft section comprising: a. an outer form structure, b. an inner form structure positioned in a spaced relation within said outer form structure including vertically disposed side walls and end walls and at least a pair of diagonally opposite stripping corner sections, each corner section having a body member with vertically disposed side edges, c. means movably interconnecting each corner section with an adjacent side wall and end wall for limited relative lateral and transverse movements, d. a plurality of coacting means on a corner section and on the side wall and end wall adjacent thereto operable to move a corner section into and out of a position wherein said vertically disposed side edges are in abutting engagement with a corresponding adjacent side wall and end wall, and e. means for releasably locking a corner section in said position against movement relative to an adjacent side wall and end wall, f. each of said coacting means including a pair of rotatable operating members rotatable together about a common axis, one of said operating members providing relative transverse movement between a corner section and adjacent end wall and side wall into said position, and the other of said operating members constituting a spacer member for holding a corner section in said position against lateral movement toward an adjacent side wall and end wall.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |