Apparatus for administering parenteral liquid in sequential units provided with a ball valve float
First Claim
1. In a parenteral liquid administering device which comprises tubular means for connecting said device to a source of said liquid, and an enlarged, liquid-holding chamber positioned in flow communication with said tubular means, said chamber including a bottom flow aperture, and a valve controlling flow through said aperture, the improvement comprising, in combination:
- said valve including;
a buoyant float ball, a valve seat positioned about said bottom flow aperture to receive said ball in air-tight sealing relation in the absence of sufficient liquid to float said ball, and apertured retention means surrounding said ball and proportioned to permit it to float in spaced relation from said valve seat in the presence of liquid passing through said apertured retention means, said apertured retention means defining a generally cylindrical chamber, said chamber defining an annular step positioned upstream from said valve seat and extending in generally normal relation to the axis of said enlarged liquid holding chamber, said annular step being positioned about said float ball when positioned on the valve seat whereby turbulent flow of liquid is created upon filling said retention means with the liquid.
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Accused Products
Abstract
A parenteral liquid administering device includes an enlarged, liquid-holding burette-type chamber for receiving measured aliquots of liquid from a source. The burette has a bottom flow aperture with a valve controlling flow through the aperture. The valve includes a buoyant float ball and a valve seat positioned about the bottom flow aperture to receive the ball, in the absence of sufficient liquid to float it, in air-tight, sealing relation. Apertured retention means are provided surrounding the ball which are proportioned to permit it to float in spaced relation from the valve seat in the presence of liquid passing through the apertured retention means.
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Citations
9 Claims
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1. In a parenteral liquid administering device which comprises tubular means for connecting said device to a source of said liquid, and an enlarged, liquid-holding chamber positioned in flow communication with said tubular means, said chamber including a bottom flow aperture, and a valve controlling flow through said aperture, the improvement comprising, in combination:
said valve including;
a buoyant float ball, a valve seat positioned about said bottom flow aperture to receive said ball in air-tight sealing relation in the absence of sufficient liquid to float said ball, and apertured retention means surrounding said ball and proportioned to permit it to float in spaced relation from said valve seat in the presence of liquid passing through said apertured retention means, said apertured retention means defining a generally cylindrical chamber, said chamber defining an annular step positioned upstream from said valve seat and extending in generally normal relation to the axis of said enlarged liquid holding chamber, said annular step being positioned about said float ball when positioned on the valve seat whereby turbulent flow of liquid is created upon filling said retention means with the liquid.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
Specification