US 2366424 A
Description (OCR text may contain errors)
Jan. 2, 1945. H. PERRY TUBING AND NEEDLE HOLDER Filed March 20, 1944 Patented Jan. 2, 1945 2,366,424 TUBING AND NEEDLE HOLDER Landis H. Perry, Glendale, Calif., assignor to Don Baxter, Inc., Glendale, Calif., a corporation of Nevada Application March 20, 1944, Serial No. 527,211
This invention relates to a combined tubing and needle holder, and relates more particularly to holders for tubing and hypodermic needles used in connection with containers for holding Another object of the present invention is to provide a holder for a tube and needle which is constructed so as to effectively hold or grip the needle only when moved into position to insure closing of the tubing.
In the use of the containers holding sterile fluids, such as intravenous solutions, and in the use of vacuum containers used in blood transfusions, and similar operations, it is necessary to establish connection between tubing and the inside of a vacuum flask, through a rubber stopper, by piercing the stoppers by a needle, such as a hypodermic needle. The tubing to be connected with the vacuum flask must be provided with a valve means for controlling the flow of fluid therethrough. If this valve means is accidently opened, or left open at the time the vacuum flask is pierced, the vacuum within the flask may be lost and the flask will then be useless for the intended purpose. By means of the present invention, I have provided a holder for a tubing and hypodermic needle which is so constructed and arranged that it holds the hypodermic needle rigid to the holder when, and only when, the valve means of the holder is set for closing the tube.
Another important object of the present invention is to provide a valve for rubber tubing which operates by compression of the tubing.
Other objects and features of the invention will be better and more fully understood from the following detailed description of a preferred form or example of the holder which embodies the invention. Such description is given in connection with the accompanying drawing, in
. which Figure l is an elevation showing the holder in position to close the tubing.
Figure 2 is an elevation of the holder in position to open the tubing for the flow of fluid.
Figure 3 is a section on the line 3--3 of Figure 1.
Figure 4 is a section on the line 4-4 of Figure 1.
The holder of the present invention may be embodied in various forms for use in connection with various different types of hypodermic needles, or similar needles. I have illustrated the invention, however, in a form adapted for use in connection with a rubber tubing 2 which is attached at its ends to a hypodermic needle 3. The hypodermic needle 3 has a cannula 4 attached to a hub 53. A portion of the end of the rubber tubing is stretched over the hub 5 and the hub 5 is provided with two knurled flanges 6, between which is provided an annular groove 1.
The holder of the present invention comprises a frame bar 8 which may be in the form of a bar curved at its end, as indicated at 9, and havingits end apertures at on side, as indicated at ll], for receiving and holding the rubber tubing 2. The opposite end of the frame bar 8 is bent inwardly, as indicated at l I, to provide a needlegripping extension to fit within the groove 1 of the hypodermic needle. The frame bar is also provided with a laterally extending member l2, which member is curved around to provide a clamp-screw-holding portion 13 parallel to the body of the frame bar 8. A clamp-screw I4 is threaded through the clamp-screw-holding portion i3 and is loosely attached to and controls the movement of a clamp bar [5.
The clamp bar l5 has one end adapted to operate as a closure for the rubber tubing 2 and the other end is shaped to engage and hold the hypodermic needle 3. As shown, the clamp bar I5 is provided with the inwardly curving portion l6 which, when pressed towards the body of the frame bar 8, is capable of squeezing the rubber tubing 2 sufficiently to shut off flow through said tubing. The lower end ll of the clamp bar engages the knurled portion 8 of the needle. The lower end I! of the clamp bar may be slightly curved where it engages the knurled portion of the needle, or may be straight, but this portion of the clamp bar should not be so shaped as to seat tightly within the groove 1 of the needle. v
The holder of the present invention in practice operates as follows: When the screw i4 is retracted so that flow through the tubing 2 is opened, the hypodermic needle 3 is held loosely between the end ll of the frame and the end I! of the clamp bar i5 so that any attempt to force the needle through a resistive body, such as a rubber plug by grasping the holder, is immediately frustrated by the needle turning inside of the holder and failing to hold itself rigid with the holder.
With the apparatus of the present invention, it is only when the set screw M has been adjusted to firmly clamp the end It against the rubber tubing to the position where flow through the tubing 2 is entirely cut ofi, that the holder rigidly holds the needle and tubing so as to permit the needle to be forced through a resistive body, such as a rubber plug.
The holder of the present invention has the advantage that the flow of fluid through the tubing is easily controlled by pressure upon the tubing itself and thereby eliminates the necessity of employing more complicated valve mechanisms which are more diliicult to clean and operate. I
While the particular form of the holder herein described is well adapted to carry out the objects of the present invention, various modifications and changes may be made, and this invention is of the scope set forth in the appended claims.
1. A holder for a needle and tubing, which comprises a frame member having a needle-gripping extension, a clamping bar adjustablerelative to said frame and having one end positioned for holding a needle in cooperation with said needle-gripping extension, and having its opposite end positioned for movement relative to said frame to serve as a tubing-closing valve member.
2. A holder for a tubing and hypodermic needle, said holder comprising a frame member having a tubing-holding portion at one end and a needle-gripping extension at the other end, means for movably mounting a clamping bar on said frame member, said clamping bar having one end positioned for cooperation with said frame for tubing-closing operations, said clamping bar having its opposite end positioned for cooperation with said extension for gripping a needle.
, latter end of said clamping bar being shaped to 'form a friction contact only with said needle,
whereby said needle is rigidly held by said holder only when said clamping bar is moved to position to squeeze said tubing closed.
4. A holder for a, tubing having a hypodermic needle at its end, said holder including a frame having means for holding the tubing and having a, needle-contacting extensiommeans for adjustably mounting a clamping bar on said frame, said clamping bar having a portion arranged for cooperation with said frame in tube-squeezing operations, and having a further portion for simultaneous cooperation with said extension for needle-grasping, said latter portion of said clamping bar being shaped to frictionally engage said needle, whereby said needle is rigidly connected to said holder only in adjusted position of said clamping bar when said tubing is squeezed closed.
LANDIS H. PERRY.