US3659978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible scaffold for supporting sliding molds or climbing molds used for the erection of concrete structures
Assignee: Individual
•
Filing: 1970-09-03
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Granted: 1972-05-02
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Expires: 1990-09-03
Abstract
Abstract A sliding or climbing mold for the erection of concrete structures the horizontal cross-section of which varies vertically comprises a scaffold system composed by a plurality of flexible scaffold units. Each such unit consists of two pivotably interconnected and intersecting rods or the like separated by yokes supporting the mold. First and second hydraulic jacks acting in the vertical and horizontal directions, respectively, accomplish the vertical movement of the scaffold system and contribute to the change of the horizontal size thereof. A spoke assembly connected to the scaffold system and comprising substantially radially and horizontally located spoke wires is used for variation of the horizontal shape of the scaffold system. A number of replaceable templets are designed for variation of the horizontal shape of the scaffold system and of the effective length of the spoke wire so as to synchronize the movements in vertical and horizontal direction.
Inventors
- 👤 Sven-Erik Vilhelm Svensson
- 👤 Erno Jozef Thoma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:00
CPC Classifications
E; E04; E04G; E04G11/00; E04G11/06; E04G11/20; E04G11/22
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
216 words
A sliding or climbing mold for the erection of concrete structures the horizontal cross-section of which varies vertically, comprising a scaffold system composed by a plurality of flexible scaffold units each consisting of two pivotably interconnected and intersecting rods or the like separated by yokes supporting the mold, the lower ends of said rods being pivotably connected to a cross-beam of the yoke and the upper ends of the rods being pivotably connected to a cross-beam vertically displaceable along the legs of the yoke, the vertical movement of the scaffold system and of the mold being accomplished by means of a first power source substantially acting in the vertical direction, a second power source acting in the horizontal direction being provided to generate or contribute to the change of the horizontal size of the scaffold system, characterized by a spoke assembly connected to the scaffold system and consisting of substantially radially and horizontally located spoke wires radiating from a central point and of means for variation of the horizontal shape of the scaffold system and of the effective length of the spoke wires in a predetermined relation to the amount of movement of the vertically acting power source in agreement with the successive variation in the vertical direction of the horizontal cross-section of said concrete structure.
Claim 2
Dependent Claim
216 words
A sliding or climbing mold for the erection of concrete structures the horizontal cross-section of which varies vertically, comprising a scaffold system composed by a plurality of flexible scaffold units each consisting of two pivotably interconnected and intersecting rods or the like separated by yokes supporting the mold, the lower ends of said rods being pivotably connected to a cross-beam of the yoke and the upper ends of the rods being pivotably connected to a cross-beam vertically displaceable along the legs of the yoke, the vertical movement of the scaffold system and of the mold being accomplished by means of a first power source substantially acting in the vertical direction, a second power source acting in the horizontal direction being provided to generate or contribute to the change of the horizontal size of the scaffold system, characterized by a spoke assembly connected to the scaffold system and consisting of substantially radially and horizontally located spoke wires radiating from a central point and of means for variation of the horizontal shape of the scaffold system and of the effective length of the spoke wires in a predetermined relation to the amount of movement of the vertically acting power source in agreement with the successive variation in the vertical direction of the horizontal cross-section of said concrete structure.
Claim 3
Dependent Claim
43 words
A mold as claimed in claim 1, characterized in that said means for variation comprise a number of replaceable templets supported by said vertically movable cross-beam and designed to synchronize the change of the scaFfold system with the change of the spoke wires.
Claim 4
Dependent Claim
59 words
A mold as claimed in claim 2, characterized by threaded spindles cooperating with the scaffold system and with the spoke wires and provided with nuts, a telescope mechanism being provided for rotation of said spindles and connected to a substantially horizontally acting power source, the total traveling distances of the telescope rods being controlled by means of said templets.
Claim 5
Dependent Claim
59 words
A mold as claimed in claim 3, characterized in that said telescope mechanism comprises two telescopic tubes displaceable relatively to each other and each cooperating with a rack in engagement with toothed ratchets acting upon said spindles, the telescopic tubes also having slots for receiving a templet serving to impart movement to the related portion of the telescope mechanism.
Claim 6
Dependent Claim
24 words
A mold as claimed in claim 4, characterized in that said templet is substantially horizontally displaceable along a vertically fixed cross-beam, preferably along rollers.
Claim 7
Dependent Claim
33 words
A mold as claimed in claim 5, characterized in that the outer tube of the telescope mechanism is provided with a stop member for cooperation with a templet attached to said displaceable cross-beam.
Claim 8
Dependent Claim
58 words
A mold as claimed in claim 3, characterized in that only one of the of the two vertical spindles cooperating with the scaffold system has a rotatable toothed ratchet, chain wheels and an endless chain being provided for transmitting to said other spindle a uniform and synchronous rotation thereof, said chain preferably being provided with a tightening device.
Claim 9
Dependent Claim
39 words
A mold as claimed in claim 1, characterized in that said substantially horizontally acting power source is constituted by a piston and cylinder device having a predetermined stroke maintained constant during change of the dimensions of the scaffold system.
Claim 10
Dependent Claim
66 words
A mold as claimed in claim 1, characterized in that said spoke assembly comprises two substantially parallel and horizontal spoke wires for each scaffold system unit, said wires passing over pulleys and connected to the scaffold by locking means for cooperation with a nut in engagement with said spindle, additional locking means being provided for provisional locking of the wires between two consecutive cycles of operation.
Claim 11
Dependent Claim
39 words
A mold as claimed in claim 3, characterized in that the pitch of the threads of the spindle acting on the spoke assembly is greater than the pitch of the threads of the spindles cooperating with the scaffold system.
Claim 12
Dependent Claim
30 words
A mold as claimed in claim 4, characterized in that the direction of operation of the ratchets is reversible and that the ratchets can be shifted into a neutral position.
Claim 13
Dependent Claim
22 words
A mold as claimed in claim 1, characterized in that said spoke assembly is completely or partially disconnectable from said scaffold system.
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) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |