Invention Grant
- Patent Title: Pressure actuated seal with relief means
- Patent Title (中): 带有释压装置的压力致动密封
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Application No.: US31282252Application Date: 1952-10-02
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Publication No.: US2712455APublication Date: 1955-07-05
- Inventor: NEILON CLAUDE R
- Applicant: NAT SUPPLY CO
- Assignee: Nat Supply Co
- Current Assignee: Nat Supply Co
- Priority: US31282252 1952-10-02
- Main IPC: E21B33/04
- IPC: E21B33/04 ; F16L19/08
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