Title:
【発明の名称】地震パルス発生器
Document Type and Number:
Japanese Patent JP3124556
Kind Code:
B2
Abstract:
A seismic pulse generator (1) has a chamber (4) pressurised with gas. The generator includes a solenoid valve (60) which can be actuated to cause the release to atmosphere of only a small amount of pressurised gas from a small control chamber (34) behind a main piston (30) to enable the piston to move away from a valve seat (32) around an outlet (26). This permits the abrupt release of the pressurised gas in the chamber (4) through the outlet and the "firing" of the generator. The arrangement maximises the use of the main pressurised gas for actual "firing" of the generator.
Inventors:
Arnold Gareth Christopher
Karlan Stephen Joseph
Karlan Stephen Joseph
Application Number:
JP52029196A
Publication Date:
January 15, 2001
Filing Date:
December 21, 1995
Export Citation:
Assignee:
Bee Gee PLC
International Classes:
G01V1/02; G01V1/137; G01V1/387; (IPC1-7): G01V1/02; G01V1/137; G01V1/387
Other References:
【文献】仏国特許出願公開2235376(FR,A1)
Attorney, Agent or Firm:
Minoru Nakamura (6 outside)