Title:
PRESSURE INDICATOR
Document Type and Number:
Japanese Patent JPS5679931
Kind Code:
A
Abstract:
The pressure indicator has a body provided with an attachment shank having a pressure fluid passage. A cylinder bore is located in the body and communicates with the passage. An end plug having a bore and a counterbore is threaded into the body. A piston is nested in the cylinder bore and has a piston rod axially extending through the cylinder bore and projecting through and outwardly of the plug. A compression spring is interposed between the plug and piston and yieldably biases the piston towards the fluid passage against the pressurized fluid. The improvement resides in the provision of a backup bushing nested within the plug bore which axially and guidably receives the piston rod. A cylindrical slide seal of a permanently lubricated material is nested within the plug bore and projects into and depends from the bushing in sealing engagement with the piston rod. An integral spring retainer and bearing assembly has a bore through which the piston rod extends and includes an annular bearing which extends into the plug bore and is spaced from the backup bushing. An O-ring in the plug bore is sealingly interposed between the plug and the slide seal and occupies the space between the bushing and bearing.
Inventors:
JIEI EDOGAA MAIRUZU
Application Number:
JP5345680A
Publication Date:
June 30, 1981
Filing Date:
April 22, 1980
Export Citation:
Assignee:
JIEI II MAIRUZU INC
International Classes:
G01L7/16; (IPC1-7): G01L7/16
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