US 2112629 A
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Description (OCR text may contain errors)
R. LLOYD March 29, 1938.
TROCAR Filed Sept. 29, 1956 2a al Patented Mar. 29, 1938 UNITED STATES PATENT OFFICE TROCAR Russel Lloyd, Tacoma, Wash.
Application September 29, 1936, Serial No. 103,109
This invention relates to instruments known a's trocars and especially to such instruments as are adapted for use by embalmers.
The objects of the invention are to provide an instrument which will not only evacuate the liquid from the cavity into which it is inserted, but will also provide means for injecting the embalming fluid without the removal of the trocar; which will provide means whereby the flow of the fluid being evacuated may be observed and which is cheap, effective and easily operated.
I attain these and other objects by the devices, mechanisms and arrangements illustrated in the accompanying drawing, in which- Fig. 1 is a plan view of the trocar, a portion thereof being shown in section; Fig. 2 is a horizontal section of the control portion of the trocar; Fig. 3 is a vertical cross-section thereon taken on the line 3 3 in Fig. 2; Fig. 4 is a vertical 20 section taken on the line 4-4 in Fig. 1; and Fig. 5 is a vertical section taken on the line 5 5 in Fig. 2.
Similar numerals of reference refer to lsimilar parts throughout the several views.
o The trocar needle I is of the usual construction, being hollow from end to end and is provided with a plurality of holes 2 at its point, and with the usual flange 3 at its other end, whereby it is attached to the control device by means of the 30 usual nut 4, which screws on the threads 5 on the end of the control device.
This control device comprises a casting 5 formed substantially as shown in the drawing, and is provided with a longitudinal passage 6 extending in a straight line from the trocar needle I therethrough. A portion l of this passage 6 is enlarged to receive a glass tube 8, and a part of the casting 5 is cut away at 9 to expose the said glass tube 8 to view. This glass tube 8 is held in place by means of the nipple Ill which is screwed on suitable threads II on the casting 5 and which has a passage I2 corresponding with and in alinement with the said passage E. A rubber tube I3 is slipped over the end of the nipple I D and extends to any desired point.
provide a vertical cylindrical cavity III, near the forward end of the passage E in the main casting 5, the said cavity I II being of larger diameter than the said passage 6 and cutting the said passage. A cylindrical plug valve I5 is mounted in this cavity III, said plug valve I5 being provided with an operating stem I6 extending through a suitable opening in the casting 5, and this stem I5 is terminated by a removable operating button II. A spring I8 is mounted around the stem I6 and between the said button I'I and the top of the casting 5. The said cavity I4 extends entirely through the bottom of the said casting 5 as hereinafter described. This plug valve I5 is provided, near its upper end, with a passage I9 corresponding in size to the above passage I through the main casting 5. The plug valve I5 extends -downward below the said passage I9 a suicient distance to cut and close the passage 6 when the plug valve I5 is in its normal or upper position. A small vertical groove 20 is made in the side of the said plug and extending upward from the bottom thereof a sufficient distance to connect with the rearward portion of the passage 6 when the said plug valve I5 is in said normal position.
Thus it will be seen that the plug valve I5 closes the said passage 5 except when it is pressed down against the action of the spring I8, at which time the passage I9 in the plug valve I5 registers with the two parts of the passage 5 in the main casting 5, and the said passage 6 is then open and may receive the fluid from the body cavity to carry it away.
The embalming fluid is delivered by means of the rubber tube 2| which is connected to a branch arm 22 of the main casting 5, said branch arm 22 having a passage 23 therethrough, extending to a point adjacent to the above described vertical cavity I4 in which the plug valve I5 is operated. At this point the passage 23 bends downward as shown in Fig. 5 and passes upward through the horizontal valve seat 24 and thence it extends downward and joins the above described passage 6 in the main casting 5 at a point between the plug valve I5 and the front end thereof. An upward-acting poppet valve 25 is mounted on a vertical stem 2li which extends through a suitablek stuning box 21 in the casting 5 and is provided with an operating button 28 at its upper end. A spring 29 surrounds said stem 26 and is positioned between the. said stuff'- ing box 21 and the button 28 and is a-dapted to hold the valve 25 closed on its valve seat 24.
Thus it will be seen that, normally, the valve seat 24 is held closed and that the embalming fluid cannot pass through the passage 23 until said button 28 is pressed down and the Valve 25 opened, whereupon the embalrning fluid passes into the needle I and thus into the cavity in the body from which the liquid has beenevacuated. An opening 3Il is made in the bottom of the casting 5 axially below the said valve 25 and of sucient size to permit the valve 25 to be removed therethrough.
The two valves I and 25, above described, are preferably in transverse alinement and the vertical passages I4 and 30 leading therefrom extend downward and are open at the bottom. An enlargement 3| is formed at the base of the casting V5, said enlargement being circular in plan and of suicient size to completely contain the two said openings I4 and 30. This enlargement 3| is screw-threaded on its outer surface and a closure cap 32 is screwed thereon, said cap 32 being adapted to completely close both of the said openings I4 and 30.
Thus it will be seen that the two valves I5 and 25 may be readily removed from the ca sting 5 for cleaning or other purposes by removing the closure cap 32 and then removing the buttons I1 and 28 and sliding the said valves I5 and 25 downward therethrough, thus permitting the entire apparatus to be thoroughly cleaned.
It will be readily seen that by making the angle between the main casting 5 and the branch arm 22 small the said parts may be grasped by one hand of the operator by means of which the apparatus may be manipulated to the best advantage and that, when so grasped, the two valve stems I1 and 28 are conveniently placed so that either one may be depressed by the operators thumb, to open the desired valve, Without having to use the other hand which might be otherwise engaged. Thus the use of the one hand to control the position of the trocar enables it to be pushed further in or pulled out from the body as needed, and by watching the window 8 the ef fect can be observed. Since the valves are spring closedv they are opened by simple depression and are automatically closed, thus permitting them to be eiciently operated by the thumb of the operator.
In operation, the trocar is inserted into the body cavity, then the plug valve I5 is pushed downward to permit the evacuation of all liquid therefrom, and while this is being accomplished,
the ilow of the said liquid may be watched through the opening 9 and the glass tube 8. When the flow of liquid has ceased the plug valve I5 is released and closes the outlet passage 6, then the valve 25 in the embalming passage 23 is opened by pressing on the button 28 and the embalming fluid then passes into the cavity by way of the trocar needle I.
It is, of course, understood that many variations in construction from the above-described control may be made without departing from the spirit of my invention as outlined in the accomypanying claims.
What I claim and desire to secure by Letters Patent, is:-
1. In a trocar, a relatively compact body secured tothe end of said needle and adapted to be operatively grasped by one hand; a drain passage extending through said body; a spring-closed plug valve, positioned at the front of said body and having a passage therethrough normally above the line of said drain passage, said plug valve being depressible against the action of its spring to bring said passage therethrough in alinement with said drain passage; an embalming-fluid passage in said body and branching from said drain passage at a point between said trocar needle and said plug valve and extending from said drain passage at a small angle thereto; and a spring-closed upwardly-acting v poppet-valve in said last passage and in alinement with and adjacent to said plug valve, whereby either of said valves may be engaged at will by the thumb of the hand of an operator grasping the body. n v
2. In a trocar as set forth in claim 1, wherein said body is provided with open-ended cavities in axial alinement with said valves, and a single closure cap closing the open ends of both said cavities whereby said valves are accessible for cleaning. Y