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. 13, 1987
Filed:
Nov. 29, 1984
Michael A Wehr, Hancock, MI (US);
Robert L Sajdak, Chassell, MI (US);
Abstract
A piston-operated spraying device dispenses a metered amount of liquid. A valve is connected through conduits to a cavity in front of the piston, to a cavity in the rear of the piston, to a pressure supply, to a supply of liquid to be sprayed, to a nozzle, and to a vent for releasing the pressure. In the open position the valve connects the rear cavity to the pressure supply, and the front cavity to a nozzle so that any liquid in the front cavity will be dispensed. In the closed position the valve connects the rear cavity to the vent for releasing the pressure, and the front cavity to the supply of liquid so that a spring can drive the piston to the rear, thereby allowing the front cavity to be filled by the liquid and preparing the device for another delivery.