US1772352A - Surgical instrument - Google Patents

Description

Aug. 5, 1930. w. I. HUBER 1,772,352

SURGICAL INSTRUMENT Original F iled Feb. 29, 1928 2 Sheets-Sheet 1 muewfoz W-I-HUBER MQMMM.

Aug. 5, 1930. w, H R 1,772,352

SURGICAL INSTRUMENT Original Filed Feb. 29, 1928 2 Sheets-Sheet 2 L '2; 21 10 ea I avweuioz W- I- HUBER @Zngr Patented Aug. 5, 1930 UNITED: STATES PATENT. oF rcs WARD I. HUBER) or CLEVELAND, oHIo, AssIGNoR TO w. I. HUBER, INCL, 0F CLEVE- LAND, OHIO, A CORPORATION or 011m; I

SURGICAL INSTRUMENT Application filed February29, 1928, Serial No. 258,047. Renewed January 2, 1930.

constructed that the operator may manipulate and control it with one hand, and also effect an interchange of snares and snare operating means in 'a rapid and convenient way while the main operating part of the instrument is held in one hand. The operating.

mechanism is also arranged to permitthe snare to be drawn to smaller dimensions by a step by step or ratchet movement. The

wiresnare is in itself removable from the.

snare holding and operating means, butas mounted and attached the snare and its immediate connecting and operating member may be sterilized and handled together and also easily removed from and connected with f the operating jaws of the instrument. The

instrument also embodies other novel and useful features. of construction as hereinafter shown and described in detail andmore concisely pointed out in the claims.

In the, accompanying drawings, 1 is a side elevation of a wire snare and its mounting on a reduced scale, and Fig. 2 isa side elevation of the pivotedlevers or main operating part of the instrument with which 1 the snare mounting is detachably connected.

Fig. 3 is an end elevation of the parts shown irrFig; 2. Fig. 4 is a side view of the snare.

and lever parts ofthe' instrument partly connected, and Fig. 5 asimilar View with said parts completely connected and latched as in use. Fig; 6 is an enlarged side elevation'ofthe rotatable holder and bearing member carrying the operating-pawl and latch for the ratchet bar, and 'Fig/T is an enlarged side View of'the forked and pivotedlevers with all its detachable parts removed therefrom.

. Fi 8 is a side view of a-wire loop or snare un ooked, and 9 isa topview of'thesnare tube which contains the ratchet rod to which the wireloop or snare may be hookedwhen the parts are assembled as shown. Fig. 10 is a top view of the instrument with all its working parts'assembled', and Fig. 11 is asection'al view horizontally of the same parts on line 11'11 of Fig. 12. Fig. 12 is a vertical section and side View of the instrument, and Fig. 13 a cross section of the snare tube on li'ne'1313 of Fig. 12. Fig. let is a sectional view of a part of the instrument on line 1%14: of Fig. 12, but greatly enlarged when compared therewith. Fig; 15 is an elevation,

on a corresponding scale of the bearing member which carries the operating pawl and latch for the ratchet bar.

p The instrument comprises two levers I 2 and 3 which are pivotally connected and have spreading or diverging arms or handles 4 and 5' adapted to begripped and pressed toward each other'by hand against the counter pressure of aspring 6 of any suitable kind interposed between the arms, The upper end ofeach lever is bifurcated, and these bifurcated ends are normally pressed together or held in contactby's'prlng 6but caused to separate "on an are when the handles are gripped and compressed by the operator. The are movement of the leversis utilized to draw a wire loop or Share 7 into the open reduced end of a tube 8 when this tube is seat ed within and rotatably connected withthe bifurcated end of lever 2, and the second lever 3 is connected to a draw member 9 for the loop or snare. A single opening movement of the levers reduces the size of the loop or. snare 'materially, but the loop may be drawn to in creasinglysmaller dimensions .by a ratchet. action until the snared material or piece is torn-off, cut orsevered. The ratchet movement is efiectedbyaspring-pressed detent. or pawl 10 which engages a series of beveled teeth 11 on 'one' side of draw member 9. As shown this member is the formfof a round is reduced in diameterin part and the end thereof flattened and perforated to permit the hooked extremities of the wire snare or loop .7 to be readily connected therewith when said flat perforated end protrudes from the reduced open end of tube 8, see Figs. 8 and 9. The opposite end of draw member 9 is provided with an enlargement orhe'ad T6 to permit the fingers to grasp and slide the draw member back and forth in tube 8, and the pawl or detent and the ratchet teeth are so ar ranged that the draw member may be pulled outwardly by hand whenever such an opera- I tion is expedient or desired. Thus,- after'attaching the wire loop to the perforated end of the draw member the hooked extremities of the loop may be drawn into the open end of the tube and the loop or snare held against displacement by the frictional contact of the hookedends with the inner wall of the tube.

1 The tube and draw member, together with the wire loop or snare, may be handled as a separate unit, being readily disconnectible from the levers as. hereinafter explained.

Accordingly any desired number of such.

-' or flaring entrance at its top. Base part 17. emboches a pair of oppositely extending lugs or trunnions 21 which are flattened or of oblong shape to pass freely through the, entrances 20 when thetube is tilted at an acute angle in respect to lever 2'as shown inFigs.

1, 2, and 4. and whenthesaid trunnionsare seated wlthm the circular openings 19 the snare tube is pivotally supported and may be turned to a fixed operatingpos-ition atright angles to. lever 2 asshown in Fig. 5. In this right-angled position of the parts the oblong trunnions 21 are locked within the circular openings 19,.and the toothed rod. or bar 9 rests within an open channel22 horizontally in the top of a cylindrical-bearing member 23 carried by the bifurcated end of the second lever 3, .In swinging the snare tube 8 and draw. member 9 from aninclined to a horizontal position the. said member, is brought to arest. position within ichannel; 22-and it isautomaticallylockedand held in that posi-- tion by w spring-pressed latch24, of arena-tie shape, which is -pivotally. secured" to hearing member23, see Figs; l tzandlti Latch 24 is confined within arvertica-l slot 25'in one end of bearingmember23 and has an arm e2;- tending upwardlyat an inclinationacross the path? of; swingingmo'vement of the toothed bar or draw member 9 so thatwhen said .-bar= descends itiaWlll strike;arm:26 a-ndopenthe latch to permit the bar to enter and seat itself in the channel. A leaf spring 27 is secured to one flat side of lever 3 and the free end 27' of this spring is bent at right angles and projected through slot 25 into engagement with the arcuate portion of latch 24 to close the latch automatically. The detent or pawl 10 which works with ratchet effect on'the teeth 1]. of member 9 consists of a flat piece of metalhavinga beveled inner end adapted to ride over the inclined faces of the teeth when draw member 9 is pulled outwardly by hand, and this pawl is free to slide within an opening extending axially of one of theflat-sided lugs or t'runuion's 28 on bearing member 23. A roundedenlargement or head 29 on the outer end of the pawl limits its movement inwardly towardthe ratchet teeth, and a leaf spring 30 secured to one flat side of lever 3 hears at its free end against head 29 to hold it yieldingly in'locking engagement with the teeth. The channeled bearing member 23 is free to rock or rotate within the bifurcated end of lever 3 inasmuch as its flat sided trunnions 28 are rotatably confined within circular openings 31 in the bifurcated portions of said lever. As in the case of lever 2 these circular openings 31 are alsoprovided with or draw member. 9 and this holder is free to rotate on its trunnion within limits or sufticiently to permit the two pivota-lly connected levers 2 and 3 to open and close with an arc movement at their bifurcated ends while the ratchet bar or draw member 9 slides on a straight line and without bind within snare tube 8. Thus in opening and closing the levers'thc snaretube is costantly held at right angles to a vertical median line between the levers and the operator has com; plete and perfect control of the instrument at all times and can apply considerable force orpower to draw the loop or snare-shut while guiding, holding and operating. the instrumentin onehand only. If the objectsnared' is-relatively largeand the snare requires-re peatedira tche ting operations of the inst-ru ment to sever the object, the operator need only. draw-the lever handles'togetherin his.

hand; relieve the pressure to permit thespring between the handles to open the leversand resetthe ratchet mechanism, and then repeat theoperation instantly. Having. serercdj the'object or-fragnientsnared, he may press latch 24 open'which will cause the snare unit to drop and tilt by gravity to an angle where its trunnions may be slipped free from the bifurcatedjend of lever 2, and an interchange immediately effected by inserting a second snare unit into the open bifurcated ends of lever 2. Swinging of the snare unit upwardly then locks it to lever 2 and a snap lock of the ratchet member 9 is effected 10 simultaneously with the pawl holder 23 on lever 3, thereby connecting all the working parts of the inst ument operatively together for immediate further use. i

Vhat I claim, is: 1 1. A surgical instrument, comprising a snare tube containing a draw member for a snare, and a'hand device detachably connccted with both the tube and draw member and in clutch engagement with said draw member for imparting relative movement to said tube and draw member.

2. A surgical instrument, comprising i a pair of pivotally connected levers, asnaretube connected pivotally and detachably to one 25 of said levers, a member for drawing a snare into said tube adapted to swing into an operating vposition opposite the second lever, means supported by said second lever to hold said draw member in its operating position 3 and a clutch engageable with said draw member. I

3. A surgical instrument, comprising a snare tube containing a member for drawing a snare thereinto, and a pair of pivotally connected levers, one of which is adapted to be connected detachably to said tube and the other having a latch vto connect said draw member thereto. p

4. A surgical instrument, comprising a pair of pivotally connected levers, a snare tube connected pivot'ally and detachably to i one of said levers, an element extending throughsaid tube for drawing a snare thereinto, a bearing member for said element rotatably" supported by the second lever, including means forlocking said element within said bearing member, and means carried by said bearing member for clutching and shifting said element longitudinally in the tube upon imparting an opening movement to said levers. v I

5. A surgical instrument, comprising a pair of pivoted levers, a snare tube having a otal connection with one of said levers to permit the tube toswing to a horizontal 0 connection forsaid snare drawing element when said tube is swung to a horizontal ;position. A

6. A surgical instrument, comprising a pair of pivoted levers, a snare tube pivotally connected to one of saidlevers, a ratchet bar extending through said tube for drawing'a snare thereinto, a holding member rotatably secured to the second lever adapted to receive said element, and a pawl carried by said member for engaging said ratchet bar.

7 A surgical instrument, comprising a pair of relatively movable members, a snare tube pivotally connected to one of said mem bers and detachable therefrom by turning in said pivot, said tube having a shiftable .element therein adapted to draw a snare into one end of said tube, and ratchet mechanism connected to the second member adapted to engage and shift said element.

8. A surgical instrument, comprising a pair of bifurcated levers, a snare tube detachably connected to the bifurcations of one lever, a slidable element for drawing a snare into one end of said tube, and clutch means mounted within the bifurcated parts of the second lever and engageable with said element.

9. A surgical instrument, comprising two pivotally connected levers, each lever having a bifurcated end, a snare tube having trun nions adapted to be connected detachably and rotatably to the bifurcated end of one lever, a draw member slidably confined within said tube, a snare detachably connected with one end of said draw member, a bearing and holding member for said draw member having trunnions rotatably connected with the bifurcated end of the second lever, a latch to hold said draw member within said bearing member, and a clutch for said drawmember carried by said bearing member.

' In testimony whereof I aflix my signature.

WARD I. HUBER.

snare drawing element extending therefrom and provided with a piv-

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