US3628223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Climbing concrete form hoist
Assignee: Individual
•
Filing: 1970-05-11
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Granted: 1971-12-21
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Expires: 1990-05-11
Abstract
Abstract A climbing form hoist for raising a form panel progressively up a concrete wall under construction, the hoist having a telescopic mast, the mast having an upper member secured to upper and lower edges of the panel, and a lower member releasably securable at a lower end to the wall. Means are provided to extend and retract the mast so that with the mast secured to the wall the form panel can be released from the wall and raised to a new position and with the form panel resecured to the wall the lower end of the mast can be released from the wall, raised and resecured.
Inventors
- 👤 Alexander Babee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:04
CPC Classifications
E; E04; E04G; E04G11/00; E04G11/06; E04G11/20; E04G11/28
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
193 words
A climbing form hoist including: a. a telescopic mast (16) having upper (20, 22) and lower (17, 18) telescopically united members, b. means (26) at a lower end of the lower member for connecting the mast in an upright position to, and spaced from, a wall of a building under construction, c. a tension element (41) connected at an upper end of the upper mast member and connectable at a lower end to a lower edge of a form panel, the form panel being disposed between the mast and the wall, d. means at an upper end of the upper member for connecting the form panel, at an upper edge thereof, to the upper end of the upper member, e. reversible drive means (31) at an upper end of the lower member in driving engagement with the tension element, so that with the mast connected to the wall the means (31) can be operated to raise the form panel, the lower end of the mast can be disconnected from the wall, the means (31) operated to retract the mast and to raise the lower member and the mast then reconnected to the wall.
Claim 2
Dependent Claim
193 words
A climbing form hoist including: a. a telescopic mast (16) having upper (20, 22) and lower (17, 18) telescopically united members, b. means (26) at a lower end of the lower member for connecting the mast in an upright position to, and spaced from, a wall of a building under construction, c. a tension element (41) connected at an upper end of the upper mast member and connectable at a lower end to a lower edge of a form panel, the form panel being disposed between the mast and the wall, d. means at an upper end of the upper member for connecting the form panel, at an upper edge thereof, to the upper end of the upper member, e. reversible drive means (31) at an upper end of the lower member in driving engagement with the tension element, so that with the mast connected to the wall the means (31) can be operated to raise the form panel, the lower end of the mast can be disconnected from the wall, the means (31) operated to retract the mast and to raise the lower member and the mast then reconnected to the wall.
Claim 3
Dependent Claim
36 words
A climbing form hoist as claimed in claim 1, in which the tension element is a roller chain and the reversible drive means includes a reversible motor driving a sprocket (34) over which the chain passes.
Claim 4
Dependent Claim
52 words
A climbing form hoist as claimed in claim 1 in which the means (d) includes at least one hook member at the upper end of the upper member adapted to engage an upper edge of the form panel so as to support the mast when the latter is disconnected from the wall.
Claim 5
Dependent Claim
26 words
A climbing form hoist as claimed in claim 3, including means (66, 67) for effecting adjustment of the hook member towards and away from the mast.
Claim 6
Dependent Claim
62 words
A climbing form hoist as claimed in claim 4 in which the means (66, 67) includes a sleeve at an upper end of the upper member, the hook member having a shank slidably fitting on the sleeve, the shank of the hook member and the sleeve each having spaced, aligned holes adapted to be position in registry for receiving a locking pin.
Claim 7
Dependent Claim
72 words
A climbing form hoist as claimed in claim 1, in which the means (b) includes a base structure (26) having a wall engaging face (29) extending parallel to the mast and spaced laterally therefrom so as to maintain the mast parallel to and spaced from the wAll, and bolt means for releasably connecting the base structure to the wall so as to press the face (29) into frictional engagement with the wall.
Claim 8
Dependent Claim
73 words
A climbing form hoist as claimed in claim 5 in which the means (66, 67) includes a base structure (26) having a wall engaging face (29) extending parallel to the mast and spaced laterally therefrom so as to maintain the mast parallel to and spaced from the wall, and bolt means for releasably connecting the base structure to the wall so as to press the face (29) into frictional engagement with the 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) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |