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:
May. 05, 2020
Filed:
Mar. 13, 2019
Chapin Manufacturing, Inc., Batavia, NY (US);
Greg Gutekunst, East Aurora, NY (US);
David Dubiel, N. Chili, NY (US);
Chapin Manufacturing, Inc., Batavia, NY (US);
Abstract
An internal pump backpack sprayer system includes first and second tanks and a double action pump unit. The first tank defines an open volume to hold a fluid. The second tank is received within the first tank and receives a pressurized fluid therein. The double action pump includes a cylinder and piston assembly having a cylinder housing with first and second inlets and first and second outlets. A piston is located and moveable within a cylinder. When the piston moves in an up-stroke, a first portion of the fluid is drawn from the first tank through the first inlet while the pressurized fluid is discharged to the second tank through the second outlet. When the piston moves in a down-stroke, a second portion of the fluid is drawn from the first tank through the second inlet while the pressurized fluid is discharged to the second tank through the first outlet.