JPS55107174A - Valve stem seal - Google Patents
Valve stem sealInfo
- 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
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
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000329234A (en) * | 1999-05-18 | 2000-11-30 | Nok Corp | Valve stem seal |
-
1979
- 1979-02-05 JP JP1213379A patent/JPS55107174A/en active Pending
Cited By (1)
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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