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:
Sep. 01, 1992
Filed:
Feb. 14, 1991
S. C. Johnson & Son, Inc., Racine, WI (US);
Abstract
Apparatus and method for using a compressed gas in an aerosol spray system to produce and maintain an effective aerosol spray includes the use of an aerosol spray valve 4 for emitting the aerosol spray. A dip tube 18 is coupled to the valve 4 and extends into the spray system. The tube 18 has an upper portion which is substantially airtight above an initial liquid level 14. A lower portion of the dip tube 18 extends below the initial liquid level 14 and has a liquid entrance hole 24 substantially at the bottom thereof. A vapor tap hole 26 is provided in the dip tube 18 above the liquid entrance hole 24 and below the initial liquid level 14. The vapor tap hole 26 allows compressed gas 16 to enter the tube 18 and mix with the liquid 20 therein when the liquid level 28 has fallen below the vapor tap hole. Even after the pressure has fallen, the mixing of the compressed gas 16 with the liquid 20 in the dip tube 18 substantially reestablishes the deteriorated spray characteristics to produce an effective aerosol spray.