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. 14, 1999
Filed:
May. 28, 1998
Brian T Hartman, Mesa, AZ (US);
Thomas A Hartman, St. Louis, MO (US);
Other;
Abstract
A liquid flow control system comprises an upstream length of conduit, a downstream length of conduit, a valve housing, a cone valve seat and a sleeve valve. The valve housing is connected between the upstream length of conduit and the downstream length of conduit. The valve housing directs a flow of liquid that exits the upstream length of conduit through the valve housing and into the downstream length of conduit. The cone valve seat is mounted stationary in the valve housing. The sleeve valve is mounted in the valve housing for movement between a closed position wherein the sleeve valve is in engagement with the cone valve seat and an opened position wherein the sleeve valve is disengaged from the cone valve seat. The downstream length of conduit is comprised of a spacer section and a reducer section downstream from the spacer section. The spacer section spaces the reducer section a predetermined distance from the base of the fixed cone of the valve that results in a significant reduction or elimination of cavitation in liquid discharged from the valve.