Title:
GAS COCK
Document Type and Number:
Japanese Patent JP2015042907
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a gas cock which has advantages such as reduction of a sliding operation force, smoothness of rotation and improvement in durability in addition to improvement in airtightness.SOLUTION: On an outer sliding surface 25 of a plug body 20, a film 30, which is 1-4 μm thick and made of a solid lubricant, is formed as a printing pattern distributed on the surface. The film 30 consists of solid patterns with which the film is formed on a whole surface and a distribution pattern with which the film is formed in a distributed state. The solid patterns are formed at a part 31 along an upper end edge and a part 33 along a lower end edge of the outer peripheral surface 25 and a surrounding part 32 of a through-hole 21 in a lateral direction. The distribution pattern is formed on the whole surface of the other part 34 of the outer peripheral surface 25. The distribution pattern is of a honeycomb shape of a hexagonal mesh shape, the linear part of the outer shell of the hexagon is a projected part, and the inner hexagonal part is a recessed part. This recessed part serves as a grease reservoir and can improve airtightness and sliding characteristics.
Inventors:
KINOSHITA AKIO
Application Number:
JP2014246471A
Publication Date:
March 05, 2015
Filing Date:
December 05, 2014
Export Citation:
Assignee:
SANKO CO INC
International Classes:
F16K5/22; F16K5/02
Domestic Patent References:
| JPH03172685A | 1991-07-26 | |||
| JPS59752B2 | 1984-01-09 | |||
| JP2005155875A | 2005-06-16 | |||
| JP2010514996A | 2010-05-06 | |||
| JPH11158513A | 1999-06-15 |
Foreign References:
| WO2002075172A1 | 2002-09-26 | |||
| US4219046A | 1980-08-26 |
Attorney, Agent or Firm:
Atsushi Watabe
Hiroaki Inada
Hiroaki Inada
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