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. 17, 1982
Filed:
Sep. 15, 1980
Allan L Smith, Exeter, CA (US);
Other;
Abstract
An emitter of very small size connects to a water supply tube by a hollow shank which conducts water to an interior chamber in the emitter housing. Between the chamber and an outlet in the housing the water flow is throttled through an elongated channel having both a wide shallow profile and a narrow steep profile. A free floating (within limits) resilient wafer covers the channel. At initial, very low water pressure at start-up, the wafer does not flex into the channel, thereby affording maximum flow to purge the emitter of unwanted dirt particles and the like. At relatively low operating pressure the wafer flexes into the wide shallow portion of the channel, reducing the flow to a predetermined amount, such as one gallon per hour. At relatively high pressure the wafer flexes further, intruding into the narrow steep slot, thereby compensating for the increased pressure and maintaining fluid flow at said predetermined rate. The free-floating wafer affords quick, thorough flushing and avoids build-up of unwanted foreign matter in the emitter.