Sanitary hydrant
First Claim
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1. A hydrant, comprising:
- a pipe having a first end and a second end;
a head for delivering fluid interconnected to said first end of said pipe;
a fluid reservoir associated with said second end of said pipe;
a means for altering pressure positioned within said reservoir and interconnected to said second end of said pipe, said means for altering pressure comprised of a first end, which is interconnected to said pipe, and a second end associated with a fluid inlet valve with a throat between said first end and said second end of said means for altering pressure;
a bypass tube having a first end interconnected to a location adjacent to said first end of said means for altering pressure and a second end interconnected to a bypass valve, said bypass valve also associated with said second end of said means for altering pressure;
wherein when said bypass valve is opened, fluid flows from said inlet valve, through said bypass tube, through said pipe, and out said hydrant head; and
wherein when said bypass valve is closed, fluid flows through said means for altering pressure, thereby creating a pressure drop adjacent to said throat that communicates with said reservoir to draw fluid therefrom.
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Abstract
A freeze resistant sanitary hydrant is provided that employs a reservoir for storage of fluid under the frost line or in an area not prone to freezing. To evacuate this reservoir, a means for altering pressure is provided that is able to function in hydrant systems that employ a vacuum breaker.
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Citations
20 Claims
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1. A hydrant, comprising:
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a pipe having a first end and a second end; a head for delivering fluid interconnected to said first end of said pipe; a fluid reservoir associated with said second end of said pipe; a means for altering pressure positioned within said reservoir and interconnected to said second end of said pipe, said means for altering pressure comprised of a first end, which is interconnected to said pipe, and a second end associated with a fluid inlet valve with a throat between said first end and said second end of said means for altering pressure; a bypass tube having a first end interconnected to a location adjacent to said first end of said means for altering pressure and a second end interconnected to a bypass valve, said bypass valve also associated with said second end of said means for altering pressure; wherein when said bypass valve is opened, fluid flows from said inlet valve, through said bypass tube, through said pipe, and out said hydrant head; and wherein when said bypass valve is closed, fluid flows through said means for altering pressure, thereby creating a pressure drop adjacent to said throat that communicates with said reservoir to draw fluid therefrom. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A hydrant, comprising:
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a standpipe having a first end and a second end; a head for delivering fluid interconnected to said first end of said standpipe, said head comprising a handle translatable between an open position and a closed position; a fluid reservoir associated with said second end of said standpipe; a venturi comprising a first end which is interconnected to said second end of said standpipe, a second end associated with a fluid inlet valve; a double check valve associated with said venturi that selectively allows fluidic communication with said reservoir; a control rod disposed within said standpipe, said control rod comprising a first end operatively connected to said handle and a second end operatively connected to said venturi, wherein when said handle is in said open position, said control rod translates said venturi upward, and wherein when said handle is in said closed position, said control rod translates said venturi downward; wherein when said handle is in said open position, said double check valve is in a closed position which prevents fluid flowing from said venturi into said reservoir; and wherein when said handle is in said closed position, said double check valve is in an open position which allows fluid to drain from said venturi into said reservoir. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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16. A sanitary hydrant, comprising:
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a standpipe having a first end and a second end; a head for delivering fluid interconnected to said first end of said standpipe, said head comprising a handle translatable between an open position and a closed position; a fluid reservoir associated with said second end of said standpipe; a venturi comprising a first end which is interconnected to said second end of said standpipe, a second end associated with a fluid inlet valve; a double check valve associated with said venturi that selectively allows fluidic communication with said reservoir; wherein when said handle is in said open position, said double check valve is in a closed position which prevents fluid flowing from said venturi into said reservoir; wherein when said handle is in said closed position, said double check valve is in an open position which allows fluid to drain from said venturi into said reservoir; wherein said double check valve comprises; a valve body with a fixed inlet volume and a fixed outlet volume, wherein said inlet volume and said outlet volume are separated by a wall; a valve cap, wherein the valve cap at least partially defines said fixed inlet volume; an inlet check valve positioned within said inlet volume; and an outlet check valve positioned within said outlet volume; and wherein said outlet check valve comprises; a piston; and a disposed on one end of said piston, wherein said filters out any rocks or debris present in said reservoir. - View Dependent Claims (17, 18, 19, 20)
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Specification