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:
Nov. 20, 1990
Filed:
Sep. 29, 1989
Eugene C Hunley, Jr, Rogers, AR (US);
Terry H Jozwiak, Witter, AR (US);
Amtrol Inc., West Warwick, RI (US);
Abstract
Freeze-proof hydrants having a housing, the first end thereof having a fitting for flow communication with a pressurized liquid source. There is a passageway in the housing for liquid flow, a back flow preventer in the passageway and a drain in the housing. A removable cartridge is located in the passageway between the back flow preventer and the first end of the housing. The cartridge has a casing having a passageway therein, a drain therein with a drain channel and at least one hole in the drain channel which extends through the casing, arrangement for retaining the removable cartridge in the passageway, and a plunger in the passageway which can be moved from an open or liquid flowing position to a closed or liquid draining position, and vice versa. The plunger has a plunger head which blocks the passageway in the closed position and which allows liquid flow in the passageway in the open position. The plunger has a body, to which the plunger head is connected, which has at least one passageway therethrough for liquid flow (but which is not in the wall thereof). The plunger blocks the two drains when in the open position. There is communication between the two drains when the plunger is in the closed position. There is also valve operating apparatus, located in the housing so as not to block the liquid flow in the passageway, to move the plunger between the open and closed position.