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US3740176A Expired / Lapsed US ⏱️ 0.0 years remaining

Machine for the manufacture of elongate concrete building blocks

Assignee: INGENJORSFIRMAN NILCON SW AB
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Filing: 1971-11-03
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Granted: 1973-06-19
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Expires: 1991-11-03
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Abstract

Abstract A slide-mounting machine for moulding preferably elongate concrete elements, wherein the mould bottom consists of a flat bed over which at least one container holding concrete mixture is adapted to travel and the mould sides consist of two forming surfaces, one being formed by a vertically positioned feeder band being rolled out in synchrony with the speed of advancement of the container, and the opposite forming surface being formed by a wall moving together with said container and vibrating in the lateral direction to compact the concrete mixture dispensed in the space or mould proper formed by said two moulding surfaces. The invention also relates to a method of manufacturing elongate objects of concrete while using the slide-moulding technique, said method being performed by discharging concrete from the one or several continuously advancing containers down onto the flat bed forming the mould bottom and vibrating the concrete to form a layer having parallel longitudinal edges and a smooth upper surface, wherein said layer is being formed between the feeder band and the forming wall positioned laterally relatively thereto and advancing together with said container, and by compacting said concrete being discharged between said band and said shaping wall.

Inventors

  • 👤 S Nilsson

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 02:46
CPC Classifications
B; B28; B28B; B28B1/00; B28B1/08; B28B1/084; B28B23/00; B28B23/02

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 121 words
A machine comprising a frame, an elongate bed over which said frame travels in the longitudinal direction of the bed, one or several containers for holding concrete mixture, an outlet opening arranged at the lower portion of said container or containers for discharging concrete mixture, forming side walls for moulding the side surfaces of the concrete layer being formed on said bed, the improvement comprising a vertically positioned feeder band constituting the one forming side of the mould, said band being arranged to be rolled out in synchrony with the advancement of the frame along the bed, and a vertically positioned wall constituting the opposite mould forming side, said wall being provided with means for vibrating it in the lateral direction.
Claim 2
Dependent Claim 121 words
A machine comprising a frame, an elongate bed over which said frame travels in the longitudinal direction of the bed, one or several containers for holding concrete mixture, an outlet opening arranged at the lower portion of said container or containers for discharging concrete mixture, forming side walls for moulding the side surfaces of the concrete layer being formed on said bed, the improvement comprising a vertically positioned feeder band constituting the one forming side of the mould, said band being arranged to be rolled out in synchrony with the advancement of the frame along the bed, and a vertically positioned wall constituting the opposite mould forming side, said wall being provided with means for vibrating it in the lateral direction.
Claim 3
Dependent Claim 49 words
An improved machine as claimed in claim 1, wherein a space, forming the mould, is delimited between said feeder band and said vibrating forming wall positioned in facing relationship with said band, said space decreasing with regard to its cross-sectional dimensions in the direction towards the outlet (rear) end.
Claim 4
Dependent Claim 25 words
An improved machine as claimed in claim 2, wherein said feeder band and said vibrating forming wall converge in the direction towards the outlet end.
Claim 5
Dependent Claim 29 words
An improved machine as claimed in claim 1, wherein said vibrating forming wall is pivotably mounted about an imaginary vertical axis extending at the forward end of the mould.
Claim 6
Dependent Claim 41 words
An improved machine as claimed in claim 1, wherein said vibrating wall is supported in said frame so as to be movable laterally for altering the width of the mould and consequently the thickness of the object moulded in said machine.
Claim 7
Dependent Claim 27 words
A machine as claimed in claim 1, wherein notches are provided for forming corresponding projections in the external face of the concrete element moulded in said machine.
Claim 8
Dependent Claim 31 words
A machine as claimed in claim 1, wherein resilient means are provided for urging the end of the vibrating forming wall closest to the outlet in a direction towards said band.

References Cited (Backward Citations)

US2902910A Cited
US3049786A Cited
US3479704A Cited
US3526556A Cited
US3669588A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-06-18 1976-12-18 1977-06-19 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-06-18 1980-12-18 1981-06-19 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-06-18 1984-12-18 1985-06-19 $7700.00 Window Closed / Lapsed

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