Device for producing prestressed concrete member

Details Device for producing prestressed concrete member Device for producing prestressed concrete member

1975-02-25

1976-10-12

Baldwin, Robert D.

Plastic article or earthenware shaping or treating: apparatus

Distinct means to feed, support or manipulate preform stock...

And means to apply stress to preform and uniting in stressed...

249 94, 249 97, B28B 2160

Patent

active

039854825

ABSTRACT:
A device for producing a prestressed concrete member adapted to facilitate the joining of one concrete member to another including a mold having a plurality of panels oppositely disposed, one of the panels being provided with a plurality of fixing metal pieces each having a concaved portion in the top surface thereof, another panel of said panels being provided with cup-shaped guide metal pieces at the corresponding positions to said fixing metal pieces, an anchor plate fixedly disposed transversely and adjacently to the top portions of said fixing metal pieces, tensioning steel members coated with an sliding material each having one end connected with said anchor plate and the other end pierced through the top portion of said guide metal piece into the inside of said guide metal piece, one end of tension steel members each having a head portion for engaging with said anchor plate or the projecting portion formed therein in the shape of a crater so as to be fitted in said concaved portion of said fixing metal piece, the anchor plate being securely clamped to said one panel at a predetermined portion thereof by means of a bolt, the other ends of said tensioning steel members in said guide metal pieces being strained by a tension applying means after the concrete that is poured in said mold is hardened, and being clamped by a nut, whereby prestress is introduced into the concrete.

REFERENCES:
patent: 2535100 (1950-12-01), Sourwine
patent: 2695754 (1954-11-01), Karig

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