Flow metering and shut-off valve

• US 4,230,300 A
• Filed: 06/11/1979
• Issued: 10/28/1980
• Est. Priority Date: 06/11/1979
• Status: Expired due to Term

• Current Assignee: Wiltse; Mary Louise
• Original Assignee: Wiltse; Mary Louise
• Inventors: Wiltse, Harold L.
• Primary Examiner(s): Rosenthal, Arnold
• Application Number:
  US06/047,052
• Time in Patent Office: 505 Days
• Field of Search: 251/267, 251/268, 251/205, 251/340, 128/274, 128/214 R
• US Class Current: 251/205
• CPC Class Codes: A61M 5/16877 Adjusting flow; Devices for setting a flow rate

Abstract

An improved combined flow metering and shut-off valve having inner and outer valve parts which are axially movable relative to one another to effect relative axial movement of a metering valve plug on one part into and out of a metering bore on the other for regulating or blocking flow through the valve flow passage. Through the use of an interlocking collar, the inner and outer valve parts can be moved with respect to each other through rotation of the collar by one hand which rotation varies the relative axial position between the valve parts to change the metering. A seal with spaced sealing lips is provided within the valve. The lips are spaced a distance sufficient to assure that their contact areas never overlap so that contamination cannot pass into fluid flowing through the valve, which fluid is usually being introduced into a living person.

Claims

1. A valve comprising:

an outer valve part comprising a tubular barrel having a relatively large diameter cylindrical portion at one end, a relatively small diameter nipple at the other end, an interior cylindrical wall defined by said relatively large diameter cylindrical portion, and an axial flow metering bore between said ends communicating at one end to the interior of said cylindrical portion and at the other to an axial passage through said nipple;

an inner valve part comprising a sleeve having an axial flow metering plug at one end slidably fitting in said metering bore, a cylindrical coupling portion at the other end, a threaded portion adjacent said cylindrical coupling portion, and a radial axially presented transverse wall about said plug between said plug and said threaded portion, said metering plug and axial flow metering bore defining therebetween at least one tapered axially extending flow passage, whereby relative axial adjustment between said metering plug and axial flow metering bore regulates fluid flow through said metering bore;

means to prevent relative rotation between said outer and inner valve parts; and

a collar threadably connected to said inner valve part, said collar including rotatably sliding attachment means to said outer value part whereby rotation of said collar causes relative axial movement of said metering plug and axial flow metering bore.

2. The valve as defined in claim 1 wherein:

said inner valve part includes a seal member thereabout,

said seal member having a pair of circumferential sealing ribs spaced a predetermined distance apart which is greater than the possible relative axial movement of said inner and outer valve parts, said ribs being sized and positioned to seal against said cylindrical interior wall of said outer valve part.

3. The valve as defined in claim 2 wherein:

said inner valve part includes a pair of spaced radially extending rings between which said seal member is retained.

4. The valve as defined in claim 3 wherein:

said tapered axial flow passage is defined by said axial flow metering bore.

5. The valve as defined in claim 3 wherein:

said tapered axial flow passage is defined by said plug.

6. A valve having a flow passageway therethrough for controlling the flow of fluid in an intravenous flow line including:

means for connecting said valve to a source of the fluid;

means for connecting said valve to a receiver of said fluid;

a first valve portion having an axis and defining at least a portion of said flow passageway therethrough;

a second valve portion defining at least a portion of said flow passageway therethrough;

means to control the flow of fluid through said valve which depend on the relative axial positioning of said first and second valve portions; and

means to vary the relative axial positioning of said first and second valve portions including a threaded portion on said first valve portion, a collar threadably engaged with said threaded portion of said first valve portion and radially slidably engaged with said second valve portion, and means to prevent relative rotation between said first and second valve portions.

7. The valve as defined in claim 6 wherein:

said means to prevent relative rotation between said first and second valve portions include at least one axially aligned channel formed in one of said valve portions and at least one radially oriented projection extending from the other valve portion into said channel.

8. The valve as defined in claim 7 wherein:

said channel is formed on said second valve portion and said radially oriented projection extends outwardly from said first valve portion.

9. The valve as defined in claim 8 wherein:

said collar includes at least one axially extending tang having a lip surface thereon and wherein said second valve portion has a radial ring surface thereon positioned for engagement by said tang lip for sliding engagement therewith.

10. The valve as defined in claim 9 wherein:

said collar includes a radial abutment surface thereon generally facing a direction opposite from said lip surface and said second valve portion includes a radial abutment surface which engages said radial abutment surface of said collar so that said collar is axially restrained to said second valve portion and is free to rotate radially with respect thereto.

11. The valve as defined in claim 10 wherein:

said first and second valve portions include means to restrict axial motion therebetween to a first predetermined distance, said first valve portion including a seal member thereabout, said seal member having a pair of circumferential sealing ribs spaced a second predetermined distance apart which is greater than said first predetermined distance, said ribs being sized and positioned to seal against said outer valve portion.

12. The valve as defined in claim 11 wherein:

said inner valve portion includes a pair of spaced radially extending rings between which said seal member is retained.

13. A valve having a flow passageway therethrough for controlling the flow of fluid in an intravenous flow line including:

means for connecting said valve to a source of the fluid;

means for connecting said valve to a receiver of said fluid;

a first valve portion having an axis and defining at least a portion of said flow passageway therethrough;

a second valve portion defining at least a portion of said flow passageway therethrough;

means to control the flow of fluid through said valve which depend on the relative axial positioning of said first and second valve portions; and

means to vary the relative axial positioning of said first and second valve portions a first predetermined distance, said first valve portion including a seal member thereabout, said seal member having a pair of circumferential sealing ribs spaced a second predetermined distance apart which is greater than said first predetermined distance, said ribs being sized and positioned to seal against said outer valve portion to close said flow passageway to contamination.

14. The valve as defined in claim 13 wherein:

said inner valve portion includes a pair of spaced radially extending rings between which said seal member is retained.

15. The valve as defined in claim 14 wherein:

said means to vary the relative axial positioning of said first and second valve portions a first predetermined distance include;

a threaded portion on said first valve portion;

a collar threadably engaged with said first valve portion and radially slidably engaged with said second valve portion; and

means to prevent relative rotation between said first and second valve portions.

16. The valve as defined in claim 15 wherein:

said means to prevent relative rotation between said first and second valve portions include at least one channel formed in one of said valve portions and at least one radially oriented projection extending from the other valve portion into said channel.

17. The valve as defined in claim 16 wherein:

said channel is formed axially in said second valve portion and said radially oriented projection extends outwardly from said first valve portion.

18. The valve as defined in claim 17 wherein:

said collar includes at least one axially extending tang having a lip surface thereon and wherein said second valve portion has a radial ring surface thereon positioned for engagement by said tang lip for sliding engagement therewith.

19. The valve as defined in claim 18 wherein said collar includes:

a serrated outer radial surface for manual manipulation; and

a radial abutment surface thereon generally facing a direction opposite from said lip surface, said second valve portion including;

a radial abutment surface which engages said radial abutment surface of said collar so that said collar is axially restrained to said second valve portion and is free to rotate radially with respect thereto.

20. The valve as defined in claim 19 wherein:

said second valve portion includes indicia thereon which in cooperation with said tang indicates the relative axial positions of said first and second valve portions.