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:
Mar. 28, 1989
Filed:
Mar. 27, 1987
Applicant:
Inventor:
Michael L Nowicki, House Springs, MO (US);
Assignee:
Dema Engineering Co., St. Louis, MO (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E03C / ;
U.S. Cl.
CPC ...
222133 ; 222309 ; 222334 ; 2221292 ; 239322 ; 4628 ;
Abstract
A vacuum actuated chemical dispenser. The dispenser includes a chemical chamber and a vacuum chamber. The dispenser further includes a chemical chamber piston and a vacuum chamber piston located and movable within their respective chambers. A coil spring associated with the pistons returns the pistons to a pre-vacuum actuated position. The pistons are adjustable in order to adjust the measured amount of chemical to be dispensed from the chemical chamber.