Pressure-actuated valve for sealing flow conduit
First Claim
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1. A pressure-actuated valve for sealing a flow conduit, which comprises:
- a housing defining a pressurizable interior;
a tubular, resilient valve member carried within said housing, said tubular valve member defining a lumen extending through said housing, said housing defining a fluid-filled space outside of said tubular valve member; and
means for varying the fluid pressure in the space within said housing outside of said tubular valve member, whereby said tubular valve member can be urged to collapse inwardly by specific fluid pressure applied.
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Abstract
A pressure-actuated valve for sealing a flow conduit. The valve comprises a housing, and a tubular resilient valve carried within the housing. The tubular valve defines a lumen extending through the housing. Means are provided for varying the pressure in the space within the housing but outside of the tubular valve. Thus, the tubular valve can be urged to collapse inwardly by specific pressure applied.
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Citations
19 Claims
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1. A pressure-actuated valve for sealing a flow conduit, which comprises:
a housing defining a pressurizable interior;
a tubular, resilient valve member carried within said housing, said tubular valve member defining a lumen extending through said housing, said housing defining a fluid-filled space outside of said tubular valve member; and
means for varying the fluid pressure in the space within said housing outside of said tubular valve member, whereby said tubular valve member can be urged to collapse inwardly by specific fluid pressure applied.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A pressure-actuated valve for sealing a flow conduit, which comprises:
a housing;
a tubular, resilient valve member carried within said housing;
said tubular valve member defining a lumen extending through said housing;
in which said housing defines a flexible, outer wall enclosing a sealed volume outside of said tubular valve member, said tubular valve member being more resilient than said flexible, outer wall and in which one transverse dimension of the housing is greater than a perpendicular transverse dimension thereof, whereby transverse pressure of the housing along said one transverse dimension can urge said tubular valve member to expand outwardly, and transverse compression of the housing along the transverse dimension perpendicular to said one transverse dimension can urge said tubular valve to collapse inwardly.- View Dependent Claims (13, 14, 15, 16)
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17. A catheter introducer which defines a sheath having a bore for receiving a catheter, said sheath defining a proximal end which carries a pressure-actuated valve for sealing the bore through the sheath, said pressure-actuated valve defining a housing;
- a tubular, resilient valve member carried within said housing, said tubular valve member defining a lumen extending through said housing;
said housing defining a wall enclosing sealed volume outside of said tubular valve member and a pressure port communicating between said sealed volume and the exterior to permit fluid pressure control in said sealed volume, to urge said tubular valve member to collapse inwardly or expand outwardly as desired;
said pressure port communicating with valve means for alternative sealing of, or opening for pressure control of, said pressure port, and pressure application means communicating with said valve means. - View Dependent Claims (18, 19)
- a tubular, resilient valve member carried within said housing, said tubular valve member defining a lumen extending through said housing;
Specification