Title:
PRESSURE RELIEVING SEAL STRUCTURE
Document Type and Number:
Japanese Patent JPH0650437
Kind Code:
A
Abstract:
PURPOSE: To securely remove a pressure of a space between a primary seal and a secondary seal so that a rod of an actuator can be operated manually.
CONSTITUTION: This seal structure has a seal assembly 20 used for sealing a shaft hole 24 and a reciprocating rod 26. The seal assembly 20 is provided within a gland 28 recessed in the shaft hole and has a seal ring 32, non-seal back-up rings 36, 38, and an energizer 34 to seal in one direction only. The energizer has a passage in the direction of axial line and a passage in the radial direction to realize one direction sealing, and the back-up ring 36 does not seal in any direction. In one embodiment, the back-up ring 38 on the downstream side is omitted.
Inventors:
MAACHIN EMU MARINGAA
Application Number:
JP8045592A
Publication Date:
February 22, 1994
Filing Date:
March 02, 1992
Export Citation:
Assignee:
SHAMBAN & CO W S
International Classes:
F16J15/16; F16J15/32; (IPC1-7): F16J15/16
Domestic Patent References:
| JPH0444565U | 1992-04-15 |
Attorney, Agent or Firm:
Youichi Oshima
Next Patent: SEALING STRUCTURE FOR HIGH SPEED REVOLVING BODY