Patent US3788494A successfully refreshed from Google Patents.
US3788494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus to facilitate the extraction of a room form
Assignee: Huennebeck Deutschland GmbH
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Filing: 1972-02-22
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Granted: 1974-01-29
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Expires: 1992-02-22
Abstract
Abstract An apparatus to facilitate the extraction of a room form which comprises a frame for carrying said room form, said frame carried on a two-axled dolly and being pivotable with respect to said dolly.
Inventors
- 👤 W Markewitz
- 👤 F Mischke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:12
CPC Classifications
E; E04; E04G; E04G19/00; E04G19/003
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
140 words
An apparatus to facilitate the extraction of a room form comprising a horizontal part and a vertical part which apparatus comprises a frame for carrying said room form, said frame carried on a two-axled dolly having at least two wheels, said dolly being pivotable with respect to said frame, said frame being heightadjustable in relationship to said dolly, to one of the wheels of said dolly a supporting means being affixed having a flat bottom disposed a distance above the plane on which said wheels may run, whereby the supporting means contacts the said plane when the wheels on the axle leading in the direction of the extraction of the form fall below the level of said plane to cause pivoting of the dolly with respect to the frame to thus arrest the extraction of said dolly, frame and form.
Claim 2
Independent Claim
140 words
An apparatus to facilitate the extraction of a room form comprising a horizontal part and a vertical part which apparatus comprises a frame for carrying said room form, said frame carried on a two-axled dolly having at least two wheels, said dolly being pivotable with respect to said frame, said frame being heightadjustable in relationship to said dolly, to one of the wheels of said dolly a supporting means being affixed having a flat bottom disposed a distance above the plane on which said wheels may run, whereby the supporting means contacts the said plane when the wheels on the axle leading in the direction of the extraction of the form fall below the level of said plane to cause pivoting of the dolly with respect to the frame to thus arrest the extraction of said dolly, frame and form.
Claim 3
Dependent Claim
59 words
An apparatus according to claim 1 wherein said dolly comprises two beams articulated together at the axle of one of the wheels of said dolly, one of said beams pivotally carrying a socket supporting said frame and the other of said beams connecting the axle of one of said wheels to the axle of the other of said wheeLs.
Claim 4
Dependent Claim
24 words
An apparatus according to claim 2 wherein there is provided means varying the angle between said beams whereby to raise or lower said frame.
Claim 5
Dependent Claim
32 words
An apparatus according to claim 3 wherein said means comprises a hydraulic cylinder and a connecting rod connected to the upper end of the beam carrying said socket, said cylinder disposed therebeneath.
Claim 6
Dependent Claim
29 words
An apparatus according to claim 3 wherein the wheel disposed about the axle where said beams are articulated is larger than the other of said wheels of said dolly.
Claim 7
Dependent Claim
25 words
An apparatus according to claim 1 wherein said supporting means comprises a block of a material of high coefficient of friction in relation to concrete.
Claim 8
Dependent Claim
38 words
An apparatus according to claim 1 wherein said supporting means comprises a block of a material of high coefficient of friction in relation to concrete which block projects angularly downwardly from the smaller wheel toward the larger wheel.
Claim 9
Dependent Claim
35 words
An apparatus according to claim 7 wherein said frame comprises a generally horizontal top member supported by a pair of generally vertical angularly disposed struts, the lower ends of which are carried in said socket.
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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |