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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.:

US 9810298 B1

PDFFull Text
Date of Patent:
Nov. 07, 2017

Filed:

May. 06, 2016

Rotary seals

Applicant:

Microtecnica S.r.l, Turin, IT;

Inventor:

Marco Gianfranceschi, Turin, IT;

Assignee:

MICROTECNICA S.R.L., Turin, IT;

Attorney:

Cantor Colburn LLP

Primary Examiner:

Gilbert Lee

Int. Cl.
CPC ...
C23C 22/24 (2006.01); F16J 15/34 (2006.01); F16H 25/24 (2006.01); C23C 4/18 (2006.01); C23C 4/11 (2016.01); C23C 4/134 (2016.01); F16H 25/22 (2006.01); F16J 15/18 (2006.01);
U.S. Cl.
CPC ...
F16H 25/2418 (2013.01); C23C 4/11 (2016.01); C23C 4/134 (2016.01); C23C 4/18 (2013.01); F16H 25/2204 (2013.01); F16J 15/181 (2013.01); F16H 2025/249 (2013.01);
Abstract

A rotary seal comprising: a shaft with a chromium oxide coating provided at a seal contact area; wherein said coating has a hardness of at least 55 Rockwell-C. The coating may have a surface roughness parameter (Ra) of between 0.2 and 0.4 circular. The coating may have a thickness of at least 0.1 mm. The coating layer forms part of a rotary seal with a flexible seal element that is biased into contact with the surface of the coating. The flexible seal element may be biased against the shaft by a spring to increase the pressure of the flexible seal element against the coating. The coating is preferably deposited by a plasma spray process.

Find Patent Forward Citations

Gianfranceschi, Marco. (2017). Rotary seals (U.S. Patent No. 9810298). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9810298

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

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