JPS55107174A - Valve stem seal - Google Patents

Valve stem seal

Info

Publication number
JPS55107174A
JPS55107174A JP1213379A JP1213379A JPS55107174A JP S55107174 A JPS55107174 A JP S55107174A JP 1213379 A JP1213379 A JP 1213379A JP 1213379 A JP1213379 A JP 1213379A JP S55107174 A JPS55107174 A JP S55107174A
Authority
JP
Japan
Prior art keywords
guide
valve stem
pressure
circumferential surface
pressure shut
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP1213379A
Other languages
Japanese (ja)
Inventor
Masamitsu Tamayama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nok Corp
Original Assignee
Nippon Oil Seal Industry Co Ltd
Nok Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Oil Seal Industry Co Ltd, Nok Corp filed Critical Nippon Oil Seal Industry Co Ltd
Priority to JP1213379A priority Critical patent/JPS55107174A/en
Publication of JPS55107174A publication Critical patent/JPS55107174A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To prevent an air pressure in an air suction tubular passage or an air discharge tubular passage from leaking, by providing around a valve stem a pressure shut-off element extended from a cylindrical mount toward a guide and having on the inner circumferential surface of a guide-side end portion thereof an annular projection contacting the valve stem.
CONSTITUTION: A frusto-conical pressure shut-off element 11 converging from a seal member 5 toward a guide 2 is extended from a cylindrical mount 4 toward the guide 2. The pressure shut-off element 11 has on the inner circumferential surface of a guide-side end portion thereof two frusto-conical pressure shut-off lips 12 which are converged toward each other and which are in contact with the circumferential surface of a valve stem 1. When the pressure in a tubular passage has become higher than that in a valve actuating chamber, the pressure in the tubular passage reaches the outside of the pressure shut-off element 11 through a gap between the valve stem 1 and guide 2. As a result, the pressure shut-off element 11 is inwardly compressed to allow the lips 12 to be pressed against the circumferential surface of the valve stem 1.
COPYRIGHT: (C)1980,JPO&Japio
JP1213379A 1979-02-05 1979-02-05 Valve stem seal Pending JPS55107174A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1213379A JPS55107174A (en) 1979-02-05 1979-02-05 Valve stem seal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1213379A JPS55107174A (en) 1979-02-05 1979-02-05 Valve stem seal

Publications (1)

Publication Number Publication Date
JPS55107174A true JPS55107174A (en) 1980-08-16

Family

ID=11797024

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1213379A Pending JPS55107174A (en) 1979-02-05 1979-02-05 Valve stem seal

Country Status (1)

Country Link
JP (1) JPS55107174A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000329234A (en) * 1999-05-18 2000-11-30 Nok Corp Valve stem seal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000329234A (en) * 1999-05-18 2000-11-30 Nok Corp Valve stem seal

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