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:
Dec. 26, 1989
Filed:
Jul. 16, 1985
Applicant:
Inventor:
Ronald F Goodnow, Leicester, MA (US);
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01L / ;
U.S. Cl.
CPC ...
91275 ; 9134 / ; 91DI / ;
Abstract
A fluid pressure oscillator is provided with a cylinder containing a piston assembly. Fluid actuated reciprocation of the piston assembly is controlled by a valve mounted externally of the cylinder. The valve is alternately shifted between 'advance' and 'retract' settings by a reciprocating actuating rod removably received in the cylinder. A magnet on the piston assembly cooperates with magnetic elements on the actuating rod to automatically reciprocate the latter.