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. 01, 1989
Filed:
Jan. 03, 1989
John M Chamberlin, Pensacola, FL (US);
Other;
Abstract
A self-actuating drip valve for attachment to a standard outdoor faucet for the prevention of freezing of such exposed faucets and water pipes leading to the faucet. A tube includes a collar at one end for securing to the end of the faucet. A stem extends within the tube so as to be adjacent the faucet. One or more ports extend between the faucet and the interior of the tube. The distal end of the stem mates with an orifice through the distal end of the tube. The tube and stem have different coefficients of expansion, one being plastic and the other being metal. In practice, the tube is attached to the faucet, which is open, and is filled with water. When the outside ambient temperature drops, the tube and stem contract at different rates and the relative movement opens the orifice in the distal end of the tube so as to permit water to drip therethrough.