The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 17, 2001
Filed:
Sep. 17, 1997
Applicant:
Inventors:
Gareth Christopher Arnold, Copt Oak, GB;
Stephen Joseph Callan, Loughborough, GB;
Assignee:
BG PLC, Reading, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01V 1/06 ;
U.S. Cl.
CPC ...
G01V 1/06 ;
Abstract
A seismic pulse generator (,) has a chamber (,) pressurised with gas. The generator includes a solenoid valve (,) which can be actuated to cause the release to atmosphere of only a small amount of pressurised gas from a small control chamber (,) behind a main piston (,) to enable the piston to move away from a valve seat (,) around an outlet (,). This permits the abrupt release of the pressurised gas in the chamber (,) 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.