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:
Jan. 21, 1997
Filed:
Mar. 09, 1995
Applicant:
Inventors:
Raymond L Hallbach, Cold Springs, KY (US);
Miles E Loretta, Jr, Cincinnati, OH (US);
Douglas W Vallance, Cincinnati, OH (US);
Assignee:
Cincinnati Milacron Inc., Cincinnati, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
13762518 ; 29890126 ; 29890128 ; 91407 ; 13762548 ; 13762569 ;
Abstract
A solid valve spool is split in two, by cutting through its center land diameter. A drill rod spacer is machined to length and inserted between the spool pieces to establish a spool assembly having a precise land width. The spool pieces and spacer are biased together in assembly so as to travel in unison, within a valve bushing, when shifted to control fluid flow, and the precisely-spaced land edges serve to pinch off fluid flow.