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. 18, 2000
Filed:
Sep. 15, 1998
John M Riney, Suwanee, GA (US);
Roger A Ziecker, Lawrenceville, GA (US);
Nordson Corporation, Westlake, OH (US);
Abstract
A liquid dispensing module for alternately dispensing and recirculating liquid including a module body having a valve stem mounted for reciprocating movement within a main passage of the body. The valve stem includes first and second valve members for respectively engaging first and second valve seats in the main passage. A recirculation passage communicates with the main passage. When the valve stem is in a dispensing position, liquid is prevented from flowing into the recirculation passage and instead flows out of one end of the module. However, when the valve stem is in a recirculation position, liquid is prevented from flowing out of the module and instead enters the recirculation passage where it may flow back to a main pump or supply in a recirculation loop. Apparatus and methods incorporating the liquid dispensing module are further described and encompass similar concepts.