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.

Date of Patent:
Apr. 25, 1989

Filed:

Mar. 28, 1988
Applicant:
Inventor:

Masahiro Umeda, Toyota, JP;

Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21C / ;
U.S. Cl.
CPC ...
173 31 ; 7460 / ; 2482312 ; 2482313 ;
Abstract

A device for applying a working or assembling process to an article at an appropriately selected position as temporarily mounted to a supporting plate through a hole formed therein, having a housing of a generally twofold tubular structure, an annular piston disposed in an annular space in said housing and adapted to be axially reciprocated by selective supply or exhaust of pressure fluid, and a plurality of cotter members arranged in the tubular housing so as to be selectively driven out of the tubular housing radially outwardly as driven by the annular piston by way of a wedging engagement with the annular piston, so that the cotter members are driven against the inner peripheral wall surface of the hole of the supporting plate with very high force available by the wedging engagement.


Find Patent Forward Citations

Umeda, Masahiro. (1989). Working/assembling device with self-clamping means (U.S. Patent No. 4823887). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4823887

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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