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:
Dec. 28, 1982
Filed:
Apr. 02, 1981
Applicant:
Inventor:
Johannes Johannson, Caracas, VE;
Assignee:
Lagoven, S.A., Caracas, VE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21D / ;
U.S. Cl.
CPC ...
249 11 ; 249178 ; 249180 ; 249184 ;
Abstract
A collapsible inner form for making tubular concrete products has upper and lower sections with rigid casting faces, and flexible side sections which buckle inwardly when the internal form is collapsed. Jacks are used to push wheels in the upper and lower sections outwardly against the cast product, forcing the sections to their collapsed positions. The inner form is movable on the wheels for removal of the inner form from the solidified cast product.
Johannson, Johannes. (1982). Method and apparatus for casting tubular bodies (U.S. Patent No. 4365781). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4365781
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile