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:
Oct. 18, 1988
Filed:
Jan. 09, 1987
Applicant:
Inventor:
Aimo Seppanen, Valkeakoski, FI;
Assignee:
KT-SUUNNITTELU Oy, Valkeakoski, FI;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B28B / ; B28B / ;
U.S. Cl.
CPC ...
425290 ; 264145 ; 264154 ; 425 63 ; 425308 ; 425385 ; 425457 ;
Abstract
An apparatus for forming frogs in the sides of a slipformed concrete element, especially a hollow-core slab is disclosed. In accordance with the invention, the frogs are formed in the sides of the element by removing cast material from the sides by a reciprocative scraping action. The reciprocative movement parallel to the side of the element is effected with a drive motor and a lever assembly. By the method, it is possible to obtain a desired frog shape and depth without damaging the side surfaces.