US940041A - Production of hollow reinforced-concrete slabs. - Google Patents

Production of hollow reinforced-concrete slabs. Download PDF

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Publication number
US940041A
US940041A US50225909A US1909502259A US940041A US 940041 A US940041 A US 940041A US 50225909 A US50225909 A US 50225909A US 1909502259 A US1909502259 A US 1909502259A US 940041 A US940041 A US 940041A
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Prior art keywords
production
concrete slabs
hollow reinforced
patterns
pattern
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Expired - Lifetime
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US50225909A
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Milutin Milankovitch
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/0003—Discharging moulded articles from the mould
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/111—Hollow block

Definitions

  • This invention has for its object the production by means of patterns of hollow Ieinforced concrete slabs having flat under sides.
  • the use of patterns for the formation of hollow parts in the slabs is already known but a rational method has hitherto been wanting which will not only allow of an easy casting of the slab but also of the simple removal of the patterns for repeated use without causing weakening of the up-- per plate at those parts where it is required as a support for the slab.
  • the method forming the subject of the present invention overcomes the difficulty in that the upper plate formed simultaneously with the ribs over the pattern is removed at those places where it is not required as a support for the slab in order to form openings in the otherwise monolithically produced slabs, which simplifies the removal of the patterns, these openings being covered later by cast plates.
  • the invention also includes the construction of a pattern which in consequence of its special mode of construction allows this easy removal from the hollow spaces in the slab after setting of the concrete.
  • the method of production is as follows On the base (not shown) constructed in the usual manner is first stamped a plate a forming the flat lower side and on this the patterns are laid the distance between which determines the thickness of the ribs 6 formed between them. In the latter are inserted the reinforcements i and supporting ties In. The upper plate m above the upper side of the pattern is constructed simultaneously I with the rib b and then bound and allowed to set.
  • the upper plate m is removed at those places where it is not required as a support, that is near the supporting points in which by the casting of a slab over the pattern longitudinal passages n and also passages 0 are left which simplify the removal of the pattern, these being afterward closed by cast plates 79 (Fig. 2).
  • the patterns are preferably constructed, as shown in Figs. 3 and 4, from three pieces 0, d and f of which the two parts 0 and d form almost symmetrically shaped angle pieces which determine the size of the ribs and whose meeting edges 6 are beveled.
  • cover piece f of the pattern On its upper edge rests the cover piece f of the pattern which springs back somewhat against the outer faces of the side walls in order to prevent it from uniting with the concrete.
  • the sides are secured to one another by withdrawable pins 8 and to the cover by bolts t arranged on it and engaging in corresponding holes in the sides.
  • the cover pieces are connected with one another by bolts u and slots '0 and the patterns are arranged one behind the other in order to prevent lateral movement of the same.
  • the removal of the patterns after binding or setting of the ribs and upper plate is effected by withdrawing the pins 8 in order to release the two sides which are drawn out by a lateral rotation and are then brought under the opening 0 the cover pieces being thereupon released in the same manner as the side pieces.

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  • Road Paving Structures (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • Moulds, Cores, Or Mandrels (AREA)

Description

M. MILANKOVITGH.
PRODUCTION OF HOLLOW REINFORCED GONGRETE SLABSM APPLICATION PILBD'JUNE 15, 1909.
940,041; Patented Nov. 16,1909.
lfiirzwaw: Jim/07330? w-mo I v aid. a] 222:?26 77234 mongw. a awAM cc. HMO-UYWAPNERS. WAamNa'IuN, D. a
UNITED STATES PATENT OFFICE.
PRODUCTION OF HOLLOW REINFORCED-CONCRETE SLABS.
Specification of Letters Patent.
Patented Nov. 16, 1909.
Application filed. June 15, 1909. Serial No. 502,259.
To all whom it may concern:
Be it known that I, MILUTIN MILANKO- vrrcrr, a subject of the Emperor of Austria and King of Hungary, and resident of Vienna IV, Austria-Hungary, have invented a certain new and useful Improvement in the Production of Hollow Reinforced-Concrete Slabs, of which the following is a specification.
This invention has for its object the production by means of patterns of hollow Ieinforced concrete slabs having flat under sides. The use of patterns for the formation of hollow parts in the slabs is already known but a rational method has hitherto been wanting which will not only allow of an easy casting of the slab but also of the simple removal of the patterns for repeated use without causing weakening of the up-- per plate at those parts where it is required as a support for the slab.
The method forming the subject of the present invention overcomes the difficulty in that the upper plate formed simultaneously with the ribs over the pattern is removed at those places where it is not required as a support for the slab in order to form openings in the otherwise monolithically produced slabs, which simplifies the removal of the patterns, these openings being covered later by cast plates. In connection therewith the invention also includes the construction of a pattern which in consequence of its special mode of construction allows this easy removal from the hollow spaces in the slab after setting of the concrete.
In the accompanying drawing Figures 1 and 2 show in section a slab produced according to the invention in two planes at right angles to one another and Figs. 3 and 4 show to enlarged scale a transverse section and part longitudinal section of the pattern itself.
The method of production is as follows On the base (not shown) constructed in the usual manner is first stamped a plate a forming the flat lower side and on this the patterns are laid the distance between which determines the thickness of the ribs 6 formed between them. In the latter are inserted the reinforcements i and supporting ties In. The upper plate m above the upper side of the pattern is constructed simultaneously I with the rib b and then bound and allowed to set.
In order to remove the pattern from the slab easily for repeated use according to the invention the upper plate m is removed at those places where it is not required as a support, that is near the supporting points in which by the casting of a slab over the pattern longitudinal passages n and also passages 0 are left which simplify the removal of the pattern, these being afterward closed by cast plates 79 (Fig. 2). In order to simplify removal the patterns are preferably constructed, as shown in Figs. 3 and 4, from three pieces 0, d and f of which the two parts 0 and d form almost symmetrically shaped angle pieces which determine the size of the ribs and whose meeting edges 6 are beveled.
On its upper edge rests the cover piece f of the pattern which springs back somewhat against the outer faces of the side walls in order to prevent it from uniting with the concrete. The sides are secured to one another by withdrawable pins 8 and to the cover by bolts t arranged on it and engaging in corresponding holes in the sides. Moreover, the cover pieces are connected with one another by bolts u and slots '0 and the patterns are arranged one behind the other in order to prevent lateral movement of the same.
The removal of the patterns after binding or setting of the ribs and upper plate is effected by withdrawing the pins 8 in order to release the two sides which are drawn out by a lateral rotation and are then brought under the opening 0 the cover pieces being thereupon released in the same manner as the side pieces.
Having described my invention what I claim and desire to secure by Letters Patent of the United States is 1. Method of producing hollow reinforced concrete slabs by means of patterns with fiat lower surfaces, consisting in casting the upper plate over the lower plate simultaneously with the ribs between the patterns in removing the upper plate at those points where it is not required as a support, in order to provide openings for the removal of the pattern, and then covering said openings with cast pieces.
2. Means for producing reinforced con- In testimony whereof I have signed my name to this specification in the presence of 16 tWo subscribing- Witnesses.
MILUTIN MILANKOVITCH.
Witnesses:
VVILHELM BERGER, ROBERT WV. HEINGARTNER.
US50225909A 1909-06-15 1909-06-15 Production of hollow reinforced-concrete slabs. Expired - Lifetime US940041A (en)

Priority Applications (1)

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US50225909A US940041A (en) 1909-06-15 1909-06-15 Production of hollow reinforced-concrete slabs.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US50225909A US940041A (en) 1909-06-15 1909-06-15 Production of hollow reinforced-concrete slabs.

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3089217A (en) * 1959-03-25 1963-05-14 Filippi Dino Equipment for concrete building construction

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3089217A (en) * 1959-03-25 1963-05-14 Filippi Dino Equipment for concrete building construction

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