Medical instrument

• US 4,673,393 A
• Filed: 12/24/1985
• Issued: 06/16/1987
• Est. Priority Date: 12/28/1984
• Status: Expired due to Fees

• Current Assignee: Terumo Kabushiki Kaisha Trading As Terumo Corporation
• Original Assignee: Terumo Kabushiki Kaisha
• Inventors: Matsumoto, Atsushi, Suzuki, Tatsuo
• Primary Examiner(s): NOT, DEFINED
• Assistant Examiner(s): Kartchner, Gene B.
• Application Number:
  US06/813,025
• Time in Patent Office: 539 Days
• Field of Search: 604/167, 604/30, 604/99, 604/169, 604/174, 604/175, 604/201, 604/213, 604/215, 604/237, 604/244, 604/256, 604/411, 604/905, 128/DIG. 26
• US Class Current: 604/167.04
• CPC Class Codes: A61M 39/0606 without means for adjusting the seal opening or pressure A61M39/0693 takes precedence

Abstract

A medical instrument having a path for receiving a bar-like member and a combination of valves provided in the path. The combination of valves comprises a first disc-like valve having a first slit open only to one of the end faces thereof and a second slit open only to the other of the end faces thereof, the first and second slits crossing each other to form a distance of intersection inside the first valve, and a second disc-like valve disposed in parallel to the first valve and having a slit opening to both end faces thereof. The slit of the second valve crosses the intersection point of the first valve so that the bar-like member passes through the slit of the second valve as well as the intersection of the first valve when it is inserted.

Claims

1. A medical instrument comprising a main body, in which a path for receiving a bar-like member is formed and a valve mounted on said main body and closing said path, the valve has two end faces in the path direction and having a slit for receiving said bar-like member and, maintaining at least a liquid-tight seal with said bar-like member being passed therethrough, and for closing said path at least in a liquid-tight state when said bar-like member is absent from said path, said valve being made of a flexible and elastic material, wherein said valve comprises a first valve, having a first slit open only to one end face of said valve and a second slit open only to the other end face thereof, said first and second slits extending only partly through said first valve and crossing each other inside said first valve to connect with each other at their intersection, and a second valve, in parallel and contacting to said first valve and having a slit extending through and open to two end faces of said second valve.

2. A medical instrument according to claim 1, wherein said soft elastic material comprises a material selected from the group consisting of silicone rubber, natural rubber, and sponge.

3. A medical instrument according to claim 1, wherein said first valve has a disk shape with a height of not less than 1 mm, and said first and second slits cross at a length of not less than 0.4 mm.

4. A medical instrument according to claim 1, wherein said slit of said second valve is a radial slit, and a center thereof overlaps the intersection of the slits of said first valve.

5. A medical instrument according to claim 1, wherein a branch port communicating with a bar-like member insertion path is connected to said main body.

6. A medical instrument according to claim 1, wherein said first and second valves are provided close together and parallel to each other.

7. A medical instrument according to claim 1, wherein said first and second slits of said first valve are arcuated slits.

8. A medical instrument according to claim 1, wherein said first slit of said first valve comprises a plurality of slits crossing each other, said second slit thereof comprises a plurality of slits crossing each other, and said first and second slits cross inside said first valve so that individual intersections overlap each other.

9. A medical instrument according to claim 1, wherein said first slit of said first valve comprises a plurality of slits which do not cross each other, said second slit thereof comprises a plurality of slits which do not cross each other, and said first and second slits cross at a plurality of positions inside said first valve.

10. A medical instrument according to claim 1, wherein at least one end face of said first or second valve has a projecting surface.