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. 24, 1992
Filed:
Jun. 05, 1991
Gerald P McCann, Los Angeles, CA (US);
Donald Verley, Lake Elizabeth, CA (US);
McCann's Engineering and Manufacturing Co., Los Angeles, CA (US);
Abstract
A flow control valve for maintaining a selected and constant flow rate over a range of liquid delivery pressures is disclosed which includes a housing, a cavity defined within the housing, an input channel in fluid communication with the cavity, the input channel adapted to transport liquid into the cavity, an output channel in fluid communication with the cavity, the output channel adapted to transport liquid from the cavity, an adjustment member receivable into the housing, a spring operative with the adjustment member, a sleeve, the sleeve having a plurality of apertures defined therein, the sleeve disposed within the cavity, a piston sized to fit within the sleeve, the piston adapted for reciprocal movement in the sleeve, the piston operative to vary the operational size of the apertures in the sleeve, the spring adapted to impart a force upon the piston to move the piston in a direction away from the sleeve, a membrane positioned between the sleeve and the piston, the membrane attached at one end to the piston, and at the other end to the sleeve, whereby introduction of liquid under pressure through the input channel into the cavity will occasion movement of the piston against the force of the spring, thus affecting the operational size of the apertures in the sleeve, for maintaining the selected liquid flow rate.