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. 07, 1995
Filed:
Jul. 08, 1993
John P Evans, Bethesda, MD (US);
Robert H Evans, Warsaw, NY (US);
Other;
Abstract
A manually operable device for metering air through a valve system for drawing into, retaining and evacuating material from a chamber having a first conveying mechanism operatively connected to the chamber and exposed to the atmosphere for transporting the material, a second air conveying mechanism operatively connected to the chamber, a manually operable device for moving air within the second conveying mechanism and a valve mechanism operatively connected to the second conveying mechanism which when in a first position upon actuation of the manually operable mechanism moves air creating a partial vacuum within the chamber causing material to be drawn into the chamber, and when in a second position upon actuation of the manually operable mechanism causes air to be introduced under positive pressure into the chamber evacuating the material from the chamber into the first conveying mechanism.