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:
Feb. 16, 1982
Filed:
Jan. 17, 1980
Edward J Rhoades, Troy, OH (US);
Edwin C Rosenberger, Piqua, OH (US);
Jerome A Waker, Casstown, OH (US);
Chem-Lawn Corporation, Columbus, OH (US);
Abstract
A trigger actuated fertilizer spray gun has a herbicide injector mounted on its muzzle with the valve for the injector having an actuator which is also accessible from the handle of the gun, so that an operator, while spraying fertilizer, can make spot applications of a herbicide as weeds are encountered in the area being fertilized. The herbicide is carried in a canister which can either be mounted on the handle of the spray gun or on a belt worn by the operator and the canister is divided into first and second, variable volume chambers by a flexible diaphragm. The first chamber is connected to the flow passage of the fertilizer to pressurize it to approximately the line pressure of the fertilizer flow, and the second chamber, containing the herbicide, is connected to the injector at a venturi-shaped portion of a passage through it. The second, herbicide filled chamber is therefore under pressure exerted by the diaphragm so that when the valve is opened the herbicide is sprayed into the flow of fertilizer passing through the injector. The venturi-shaped portion of the passage at the point where the herbicide is injected into the fertilizer flow also facilitates herbicide flow so that there is an almost instantaneous flow of herbicide into the fertilizer when the valve is actuated.