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:
Aug. 19, 1997
Filed:
Jan. 04, 1996
Jacques J Barriac, Claremont, CA (US);
Calmar Inc., City of Industry, CA (US);
Abstract
A manually actuated pump sprayer has an unvalved vent port connected by a vent tube to a float buoyed on the liquid level within the container. A dip tube forming a liquid passage extends from a valve controlled inlet which leads into the pump chamber. A terminal end of the liquid passage defined by the dip tube is connected to the float for communicating that end with the liquid in the container, and a terminal end of the air passage defined by the vent tube is connected to the float for communicating the air passage terminal end with the head space in the container. The pressure within the head space is always maintained at atmospheric, and the sprayer is capable of being operated in any position without leakage. The tubes may formed as an integrally extruded double tube with air pockets formed along the length of the double tube to define the float. And, buoyant material forming the air passage may define the float.