The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 23, 1976
Filed:
Dec. 30, 1974
Takemitsu Mori, Hachioji, JA;
Toshio Tsunoda, Fujisawa, JA;
Shinzo Hasegawa, Kanagawa, JA;
Masao Tanaka, Kamakura, JA;
Nippon Concrete Industries Co. Ltd., Tokyo, JA;
Abstract
This invention relates to an apparatus for tensioning reinforcements in the process of manufacturing concrete poles and the like having the structure in which a tension plate of a circular ring shape is fixed to an end plate for setting reinforcements placed inside a mold in a freely slidable manner, the inner surface of the tension plate is engaged with a jack rod, the outer periphery of the tension plate is provided with a plurality of protuberances whose thickness is less than that of the tension plate and which are spaced at equal intervals thereabout, a set ring of a circular ring shape is provided for contacting a flange part at the end of the mold, and the inner surface of the set ring is contacted with the outer periphery of the tension plate and has a plurality of concave parts into which the said protuberances can be disposed; and additional structure by which methods of engaging the tension plate with the jack rod and disengaging the plate from the rod are able to be accomplished in different ways.