Static molds – Core – Including means for attaching core to a support
Patent
1980-12-29
1984-06-05
McQuade, John
Static molds
Core
Including means for attaching core to a support
249183, B28B 728
Patent
active
RE0315982
ABSTRACT:
Disclosed is a device for forming apertures in cement or similar hardenable, plastic materials. The device, intended for use where holes of several inches in length are desired, comprises a body portion having affixed therein a threaded nut or coil. The body portion may be, for example, cylindrical in shape and be a solid elastomeric material having an aperture which extends axially through the body portion and communicates with a nut. The nut should be located adjacent the topmost portion of the body portion. A threaded rod may be inserted in the body aperture and screwed into the nut. A U-shaped bracket is provided which is placed on the hardened cement with the legs of the U-shape disposed on either side of body member. The joining member (which completes the U-shape) is spaced above and from the body portion by the legs. The joining member has a slot for receiving the bolt. The device is removed by threading a nut on the bolt down upon the joining member of the bracket. As the nut is turned, the rod is lifted. The lifting of the rod exerts pressure on the nut within the body member which then resiliently elongates the body portion and removes it from the cement.
REFERENCES:
patent: 1680542 (1928-08-01), Hintze
patent: 2728126 (1955-12-01), Whitlock
patent: 3265349 (1966-08-01), Hamrick
patent: 3437309 (1969-04-01), Tausanovitch
patent: 3469817 (1969-09-01), Bowden et al.
patent: 3705469 (1972-12-01), Eriksson
Furgang Philip
McQuade John
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