Medical pressure relief valve
First Claim
1. A pressure relief valve for preventing overpressure conditions in medical fluid delivery circuits utilizing positive pressure pumping, comprising;
- a valve body member, said valve body member includingfirst and second connector elements for use in connecting the pressure relief valve into a medical fluid delivery circuit,first and second bores, said bores passing through the first and second connector elements, respectively, and exiting at respective first and second exit ports on the side of the valve body member, anda valve seat, said valve seat comprising a raised ridge element on the valve body member between said first and second exit ports; and
a tubular valve member formed from an elastic material, said tubing valve member being placed in elastic tension in sealing engagement over the valve body member so as to cover the first and second exit ports and the valve seat.
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Accused Products
Abstract
Pressure relief valve apparatus is disclosed for shunting fluids under conditions of overpressure, thereby preventing further increases in the pressure within a fluid delivery system. A presently preferred embodiment of the apparatus of the invention is formed of two components, a valve body member and a valve tube member. The valve body member is provided with first and second connector elements for use in connecting the pressure relief valve into a medical fluid delivery circuit. It is also provided with first and second bores passing through the first and second connector elements, respectively, and exiting at respective first and second exit ports on the side of the valve body member. A valve seat comprising a raised annular ridge around the circumference of the valve body member separates the first and second exit ports. The valve tube member is formed from an elastic material, preferably silicone tubing, and is placed in elastic tension over the valve body member so as to cover both exit ports and the valve seat. Under conditions of rest and low pressures, the valve tube member prevents fluid from passing between the two exit ports, but under conditions of overpressure, the valve tube member will stretch away from the valve seat, forming a gap therebetween through which fluid will flow.
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Citations
14 Claims
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1. A pressure relief valve for preventing overpressure conditions in medical fluid delivery circuits utilizing positive pressure pumping, comprising;
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a valve body member, said valve body member including first and second connector elements for use in connecting the pressure relief valve into a medical fluid delivery circuit, first and second bores, said bores passing through the first and second connector elements, respectively, and exiting at respective first and second exit ports on the side of the valve body member, and a valve seat, said valve seat comprising a raised ridge element on the valve body member between said first and second exit ports; and a tubular valve member formed from an elastic material, said tubing valve member being placed in elastic tension in sealing engagement over the valve body member so as to cover the first and second exit ports and the valve seat. - View Dependent Claims (2, 3, 4, 5, 6, 14)
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7. A medical fluid delivery circuits protected against harmful overpressure situations, comprising:
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a positive pressure pump; and a pressure relief valve, said pressure relief valve comprising; a valve body member, said valve body member including first and second connector elements for use in connecting the pressure relief valve into a medical fluid delivery circuit, first and second bores, said bores passing through the first and second connector elements, respectively, and exiting at respective first and second exit ports on the side of the valve body member, and a valve seat, said valve seat comprising a raised ridge element on the vane body member between said first and second exit ports; and a tubular valve member formed from an elastic material, said tubular valve member being placed in elastic tension in sealing engagement over the valve body member so as to cover the first and second exit ports and the valve seat. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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Specification