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. 29, 1987
Filed:
Nov. 19, 1986
Applicant:
Inventor:
Eugene H Harms, Perrysburg, OH (US);
Assignee:
Henry Filters, Inc., Bowling Green, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; B01D / ;
U.S. Cl.
CPC ...
210783 ; 210806 ; 210251 ; 210297 ; 210387 ;
Abstract
A method of filtering coolant for a central coolant system supplying clean coolant to a plurality of machining stations. The method simultaneously filters the coolant in a single tank through both a perforate drum filter and a paper filter to obtain clean coolant of two distinct clarity levels. The coolant of enhanced clarity resulting from the operation of the paper filter either can be supplied to a machine requiring such coolant clarity (e.g., a gun drill) or can be used as a 'polishing filter' to remove fines from the coolant in the central system.