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:
Apr. 01, 1986
Filed:
May. 09, 1980
Paul S Frates, Brunswick, OH (US);
Charles H Scholl, Duluth, GA (US);
Nordson Corporation, Amherst, OH (US);
Abstract
A liquid dispensing device is disclosed in which there is a movable needle operable to open and close a valve seat located within a nozzle of the dispensing device. The needle valve is guided by longitudinal bushing surfaces contained within the nozzle bore. The nozzle has very nearly zero volumetric capacity internally of the nozzle within which liquid may collect between the closed valve seat and the outlet orifice of the nozzle. This 'zero capacity' nozzle contains two needle valve engageable seating surfaces, the first of which is operable to close off flow through the nozzle from the dispensing device, and the second of which subsequently closes the nozzle orifice.