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| Number | Title | Issue Date |
| 7234479 | Sanitary yard hydrant A water hydrant for suppling potable water from a water source has an internal movable riser contained within a housing that extends beneath the ground to a depth below which freezing temperatures cannot reach. A chamber housing located at a distal end of the hydran... | 06/26/2007 |
| 7059337 | Fluid hydrant A hydrant comprising a housing forming a reservoir; and a piston configured to force residual fluid out of the reservoir to an outlet and to allow supply fluid to flow from an inlet through the piston to the outlet when the piston is actuated in the housing to a fir... | 06/13/2006 |
| 6899120 | Yard hydrant A yard hydrant has an elongated wet pipe with a plunger that seals against the inside of a well casing. Lifting a pivoting handle at the top of the wet pipe lowers the wet pipe which opens a normally closed supply valve. Pressurized water can then flow up the wet pi... | 05/31/2005 |
| 6427716 | Positive displacement hydrant with water discharge path from reservoir A hydrant, comprising in combination an upper portion including a handle, a lower portion to be installed at least in part underground, the lower portion including a reservoir and a piston adapted to be displaced in the reservoir in response to handle man... | 08/06/2002 |
| 6085776 | Water supply system A freeze-resistant water supply system comprising a water outlet or outlets having ON-OFF controls; a water supply line or lines to the outlet or outlets and having a section subjected to cold temperature, and a drain line or lines associated with the out... | 07/11/2000 |
| 6047723 | Positive displacement yard hydrant A yard hydrant comprising a cylinder, and a piston movable up and down in the cylinder in association with water flow into and out of a reservoir in the cylinder; tubular structure associated with the piston and extending upwardly from the piston and down... | 04/11/2000 |
| 6003780 | Freezeproof valve assembly for a drinking fountain An improved freezeproof or freeze resistant valve assembly is provided for use in an outdoor drinking fountain or the like. The fountain includes a main on-off valve for coupling an underground water supply conduit via a standpipe to a fountain head to di... | 12/21/1999 |
| 5553637 | Frost-free water supply A freeze-resistant water supply system comprising a drinking water outlet having an ON-OFF control; a water supply line to the outlet and having a section subjected to cold temperature, and a drain line associated with the outlet to receive discharge wate... | 09/10/1996 |
| 5261441 | Yard hydrant A yard hydrant includes a discharge nozzle above ground level connected to other vertically reciprocal working parts in the ground below the frost line. A cylindrical water reservoir unit, disposed below the frost line around said working parts, includes ... | 11/16/1993 |
| 4653521 | Freezeless ground hydrant and method for operating same The present invention is for a freezeless ground hydrant having a nozzle above ground and having a main valve adapted to be connected to an underground source of water pressure at a point located below the frost line in the soil. Also underground is a dra... | 03/31/1987 |
| 4653522 | Ground hydrant and method for operating same The ground hydrant of the present invention includes an outlet nozzle above ground and a drain water collection cylinder located below the frost line of the ground. When the hydrant is shut off, the residual water in the nozzle drains into the ground wate... | 03/31/1987 |
| 4282895 | Freeze-proof, pollution free valve A valve is located below the frost line in the water supply line for a drinking fountain or the like. When the valve is opened, a piston is raised by the water pressure, compressing a spring. When the valve is closed, the spring retracts the piston, sucki... | 08/11/1981 |
| 4096877 | Freezeproof sanitary water supply appliance A water supply control appliance adapted to be buried in soil beneath local frost level contains a chamber fitted with a piston which is spring-biased in opposition to inlet water pressure. Such pressure forces the piston to fully charged position at one ... | 06/27/1978 |
