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:
Nov. 09, 1999

Filed:

Nov. 19, 1996
Applicant:
Inventor:

Kouki Fukui, Osaka, JP;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01B / ;
U.S. Cl.
CPC ...
1741 / ; 1741 / ; 174 37 ; 174 683 ; 138122 ;
Abstract

A sheath is provided with necessary conditions where inner and outer surfaces thereof are both formed in an uneven helical shape, where the outer surface of a trough is almost flat, where a width W of the trough between inflection points of a curve along the inner surface of the trough and a width w of a top between inflection points of a curve along the top satisfy the relation of W>w, where a thickness T of the trough and a thickness t of the top satisfy the relation of T>t, where a projection of the inner surface of the trough is formed in a gentle arc compared to a recess of the inner surface of the top, and where an inner perimeter of the recess of the inner surface projects circumferentially outward more than an outer-perimeter of the outer surface of the trough. The sheath is entirely formed of polyolefin resin material.


Find Patent Forward Citations

Fukui, Kouki. (1999). Pc cable protective sheath for prestressed concrete (U.S. Patent No. 5981876). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5981876

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

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