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:
Oct. 31, 2006
Filed:
Jul. 16, 2004
Applicants:
Masaaki Kawahashi, Saitama, JP;
Tamotsu Fujioka, Yokohama, JP;
Masayuki Saito, Cincinnati, OH (US);
Inventors:
Assignee:
Anest Iwata Corporation, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01V 1/145 (2006.01);
U.S. Cl.
CPC ...
Abstract
An acoustic fluid machine has an acoustic resonator and a piston reciprocated by an actuator at the base of the acoustic resonator. A valve device is provided on the upper end of the acoustic resonator. External air is introduced into the acoustic resonator through the valve device. The piston has through-holes, through which front space communicates with rear space thereby reducing load applied onto the piston.