Momentary high pressure valve
First Claim
1. A valve, comprising:
- a housing having a low pressure fluid port, a high pressure fluid port, and a common port; and
a valve element situated within the housing between the ports, the valve element having a body and a generally flat control wall with first and second surfaces, the control wall included in the body, a first flow path extending through the body and along the first surface of the control wall and coupling the low pressure fluid port to the common port, and a second flow path extending along the second surface of the control wall and coupling the high pressure fluid port to the common port, the valve element further having a contact member normally bearing against a valve seat associated with the second flow path so as to occlude the second flow path, the contact member being responsive to high pressure at the high pressure fluid port so as to move away from the valve seat and thereby open the second flow path, the control wall flexing into the first flow path in response to such opening.
2 Assignments
0 Petitions
Accused Products
Abstract
A valve (10) comprises a housing (12) with a valve element (14) which normally fluidicly couples a low pressure operating device, such as a transducer (30) and tubing (34) to be coupled to a patient (36) along a first flow path (42) including a flexible control wall (58) which normally interrupts a second flow path (72) between a high pressure generating source such as an injector syringe (32) and the tubing (34), but which flexes, in response to high pressure excursions from the syringe (32) to allow the second flow path (72) to open as it flexes into the first flow path (42) to thereby restrict same thus providing protection to the transducer (30) during the high pressure excursion from the syringe (32).
69 Citations
39 Claims
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1. A valve, comprising:
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a housing having a low pressure fluid port, a high pressure fluid port, and a common port; and a valve element situated within the housing between the ports, the valve element having a body and a generally flat control wall with first and second surfaces, the control wall included in the body, a first flow path extending through the body and along the first surface of the control wall and coupling the low pressure fluid port to the common port, and a second flow path extending along the second surface of the control wall and coupling the high pressure fluid port to the common port, the valve element further having a contact member normally bearing against a valve seat associated with the second flow path so as to occlude the second flow path, the contact member being responsive to high pressure at the high pressure fluid port so as to move away from the valve seat and thereby open the second flow path, the control wall flexing into the first flow path in response to such opening. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 13, 16, 17, 18, 19)
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10. A valve comprising:
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a housing having a low pressure fluid port, a high pressure fluid port, and a common port; and a valve element situated within the housing between the ports, the valve element having a control wall with first and second surfaces, a first flow path extending along the first surface of the control wall and coupling the low pressure fluid port to the common port, and a second flow path extending along the second surface of the control wall and coupling the high pressure fluid port to the common port, the valve element further having a contact member normally bearing against a valve seat associated with the second flow path so as to occlude the second flow path, the contact member being responsive to high pressure at the high pressure fluid port so as to move away from the valve seat and thereby open the second flow path, the control wall flexing into the first flow path in response to such opening, the valve element having a conical portion through which the first flow path extends and a trough in the conical portion defining a portion of the second flow path. - View Dependent Claims (11, 12)
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14. A valve comprising:
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a housing having a low pressure fluid port, a high pressure fluid port, and a common port; a valve element situated within the housing between the ports, the valve element having a control wall with first and second surfaces, a first flow path extending along the first surface of the control wall and coupling the low pressure fluid port to the common port, and a second flow path extending along the second surface of the control wall and coupling the high pressure fluid port to the common port, the valve element further having a contact member normally bearing against a valve seat associated with the second flow path so as to occlude the second flow path, the contact member being responsive to high pressure at the high pressure fluid port so as to move away from the valve seat and thereby open the second flow path, the control wall flexing into the first flow path in response to such opening; and an end cap received in the low pressure fluid port of the housing, the end cap having an inlet passage in fluid communication with the first flow path of the valve element, the end cap frictionally engaging the housing to retain the valve element within the housing. - View Dependent Claims (15)
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20. A valve, comprising:
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a housing having a low pressure fluid port, a high pressure fluid port, and a common port; and a valve element situated within the housing between the ports, the valve element having a body and a generally flat control wall with first and second surfaces, the control wall included in the body, a first flow path extending through the body and along the first surface of the control wall and coupling the low pressure fluid port to the common port, and a second flow path extending along the second surface of the control wall and coupling the high pressure fluid port to the common port, a portion of the second surface normally bearing against an inner surface of the housing so as to occlude the second flow path, the control wall being responsive to high pressure at the high pressure fluid port so as to move away from the inner surface of the housing and thereby open the second flow path, the control wall flexing into and occluding the first flow path in response to such opening.
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21. A valve element, comprising:
a solid body having first and second ports, a passage extending from the first port to the second port to define a first flow path, and an outer portion with a trough formed therein, the trough having a flexible side defining a generally flat control wall between the trough and the first flow path, the control wall adapted to flex into the first flow path in response to high pressure directed at the control wall so as to temporarily restrict the first flow path. - View Dependent Claims (26, 27, 28)
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22. A valve element comprising:
a solid body having first and second ports, a passage extending from the first port to the second port to define a first flow path, and an outer portion with a trough formed therein, the trough having a flexible side defining a generally planar control wall between the trough and the first flow path, the control wall adapted to flex into the first flow path in response to high pressure directed at the control wall so as to temporarily restrict the first flow path, the control wall being generally planar. - View Dependent Claims (23, 36, 37)
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24. A valve element comprising:
a solid body having first and second ports, a passage extending from the first port to the second port to define a first flow path, and an outer portion with a trough formed therein, the trough having a flexible side defining a control wall between the trough and the first flow path, the control wall adapted to flex into the first flow path in response to high pressure directed at the control wall so as to temporarily restrict the first flow path, the first flow path having a portion with a D-shaped cross-section, the control wall defining part of the D-shaped portion. - View Dependent Claims (25, 38, 39)
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29. A method of controlling the flow of low pressure fluid and high pressure fluid to a supply line, comprising:
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placing the supply line in fluid communication with a common port of a housing, the housing having a low pressure port for receiving the low pressure fluid and a high pressure port for receiving the high pressure fluid; communicating the low pressure fluid through a first flow path being defined through a body of a valve element situated within the housing between the ports, the first flow path coupling the low pressure fluid port to the common port, the body of the valve element having a generally flat control wall with a first surface defining a portion of the first flow path and a second surface defining a portion of a second flow path, the second flow path coupling the high pressure port to the common port, the valve element further including a contact member normally bearing against a valve seat associated with the second flow path, the contact member being responsive to high pressure at the high pressure fluid port; and communicating high pressure fluid to the high pressure fluid port so as to move the contact member away from the valve seat and thereby open the second flow path, the control wall flexing into the first flow path in response to such opening. - View Dependent Claims (30, 31, 32, 33, 34)
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35. A method of controlling the flow of low pressure fluid and high pressure fluid to a supply line, comprising:
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placing the supply line in fluid communication with a common port of a housing, the housing having a low pressure port for receiving the low pressure fluid and a high pressure port for receiving the high pressure fluid; communicating the low pressure fluid through a first flow path being defined through a body of a valve element situated within the housing between the ports, the first flow path fluidicly coupling the low pressure fluid port to the common port, the body of the valve element further including a generally flat control wall with a first surface defining a portion of the first flow path and a second surface normally bearing against an inner surface of the housing, the control wall being responsive to high pressure at the high pressure fluid port; and communicating high pressure fluid to the high pressure fluid port so as to flex the control wall away from the inner surface of the housing and into the first flow path to thereby form a second flow path between the second surface and the inner surface, the second flow path fluidicly coupling the high pressure fluid port to the common port.
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Specification