In-line cannula valve assembly
First Claim
1. An in-line cannula valve assembly for controlling flow through a conduit, comprising:
- a housing, including a collapsible housing part comprising a flexible wall, joined to a relatively rigid housing part;
a first fluid passage in said collapsible housing part, and a second fluid passage in said relatively rigid housing part;
a cannula element, defining a piercing point at a first end of the cannula element, the piercing point end being positioned in said second fluid passage, and the opposite end of the cannula being positioned adjacent said first fluid passage, said cannula element being adapted for longitudinal movement through said first and second fluid passages;
a longitudinal groove defined in the cannula element extending to said opposite end thereof and terminating short of said piercing point to define a sealing surface between said piercing point and groove;
sealing means positioned about said cannula element, whereby longitudinal movement of said cannula element permits the positioning of said cannula element in a first, closed position, in which said longitudinal groove is spaced from said sealing means and the sealing means engages the sealing surface, and a second, flow-permitting, longitudinal position in which said groove passes through said sealing means to permit fluid flow along said groove between said first and second fluid passages; and
a rupturable membrane preventing flow through said conduit, and positioned to be ruptured by the piercing point of said cannula element by longitudinal movement thereof.
0 Assignments
0 Petitions
Accused Products
Abstract
An in-line cannula valve assembly for controlling flow through a conduit, comprising a housing, including a collapsible housing part having a flexible wall, joined to a relatively rigid housing part. A first fluid passage in the relatively rigid housing part are provided as a portion of the conduit. A cannula element is positioned with its piercing point end in the second fluid passage, and the opposite end is positioned adjacent the first fluid passage. The cannula element is adapted for longitudinal movement through the first and second passages. A longitudinal groove is defined in the cannula element extending to the opposite end, but terminating short of the piercing point end. Sealing means are positioned about the cannula element. Thus, the cannula element may be positioned in either a first, closed position in which the longitudinal groove is spaced from the sealing means, or a second. flow-permitting position in which the groove passes through the sealing means, to permit fluid flow along the groove through the sealing means. A rupturable membrane is also provided to prevent flow through the conduit, being positioned to be ruptured by the piercing point of the cannula element by longitudinal movement thereof.
269 Citations
10 Claims
-
1. An in-line cannula valve assembly for controlling flow through a conduit, comprising:
- a housing, including a collapsible housing part comprising a flexible wall, joined to a relatively rigid housing part;
a first fluid passage in said collapsible housing part, and a second fluid passage in said relatively rigid housing part;
a cannula element, defining a piercing point at a first end of the cannula element, the piercing point end being positioned in said second fluid passage, and the opposite end of the cannula being positioned adjacent said first fluid passage, said cannula element being adapted for longitudinal movement through said first and second fluid passages;
a longitudinal groove defined in the cannula element extending to said opposite end thereof and terminating short of said piercing point to define a sealing surface between said piercing point and groove;
sealing means positioned about said cannula element, whereby longitudinal movement of said cannula element permits the positioning of said cannula element in a first, closed position, in which said longitudinal groove is spaced from said sealing means and the sealing means engages the sealing surface, and a second, flow-permitting, longitudinal position in which said groove passes through said sealing means to permit fluid flow along said groove between said first and second fluid passages; and
a rupturable membrane preventing flow through said conduit, and positioned to be ruptured by the piercing point of said cannula element by longitudinal movement thereof. - View Dependent Claims (2, 3, 4, 5, 6)
- a housing, including a collapsible housing part comprising a flexible wall, joined to a relatively rigid housing part;
-
7. An in-line cannula valve assembly for controlling flow through a conduit, comprising:
- a housing, including a collapsible housing part comprising a flexible wall, joined to a relatively rigid housing part;
a first fluid passage in said collapsible housing part, and a second fluid passage in said relatively rigid housing part;
a cannula element adapted for longitudinal movement through said first and second fluid passages;
a longitudinal groove defined in the cannula element extending from one end of the cannula element to a point spaced from the other end thereof, a portion of said cannula element adjacent said other end defining a solid, unbroken outer surface; and
sealing means, associated with said cannula element, to prevent fluid flow through said first and second fluid passages while said cannula element occupies a first longitudinal position, while fluid flow is permitted through said first and second fluid passages and through said groove when the cannula element occupies a second longitudinal position. - View Dependent Claims (8, 9, 10)
- a housing, including a collapsible housing part comprising a flexible wall, joined to a relatively rigid housing part;
Specification