US2567182A - Tourniquet - Google Patents

Description

Sept. 11, 1951 COHEN 2,567,182

TOURNIQUET Fled 0012. '7, 1949 INVENTOK.

b lQ/avui (943570? BY firm/40w Patented Sept. 11, 1951 UNITED *s AT s PATENT OFFICE TOURNIQUET 4 David Cohen, NewYork, N. Y.',' assignor to Safety Tourniquet, Corporation, New York, N. Y., a corporation of New York I Application October 7, 1949, Serial No. 120,100

My invention relates to physicians and surgeons clamp tourniquets, and comprehends improvements in the structures embodied in the patents to Harry Cohen, No. 1,957,992, dated May 8, 1934, and Reissue No. 19,924, dated April 14, 1936.

In practical experience it has been found that the eyes 6 and I of these paten-ts-'designed for the insertion of the fingers of the operator-are more of a hindrancethan a. matter of utility. They are in the way and often confuse the operatorespecially the inexperienced-.causing ,him to unintentionally jab the limb of the. patient with the outer ends of the limb-embracing elements before the latter are fully extended.

These disadvantages are'overcom'e by eliminating the eyes altogether and, instead, providing straight handle or shank portionsdevoid of any jutting impedimenta, in fact, even the means for adjusting the limb-embracing elements in diverse positions, and which includes an arcuate extension is disposed remotely from the inner endsof the handles so as to permit an unobstructed and quick grasp of the handles.

Further, the ratchet teeth I3 of the arcuate plates I2, and the worm wheel I4 of Patent No. 1,957,992 are objectionable in that they confront the operator and after considerable use, the edges of the teeth and worm wheel-due to friction, become relatively sharp and jagged and tend to cut the ends of the fingersunless the operator is exceedingly careful.

In my invention, the teeth of the arcuate plate are on the outside edge, and no worm wheel is employed, thus reducing to a minimum the chances of injuring ones fingers.

Moreover, due to the manner in which the invention has been simplified, it is manifest that quantity production, at reduced cost, is assured.

To the accomplishment of the recited objects, and others, subordinate thereto, the preferred embodiment of my invention resides in the con-' j y 2 o1 iins., (Cl. 128-327) 2 prise curved gripping elements 89 and straight handles I0-'I'I. 'At a point just below the hinge I onehandle provided with a recess I2 termina'ting short o'fthe outer wall thereof and the other handle is formed with a slot I3 which extends" clear through. Recess I2 receives the rebated extension-Mfof the arcuate plate I5 which ispivoted thereinby cross pin I6. In this connectio'nQ-it willbe noted that the outer terminal of' the'ratchet and the pivotal point I of membrs"-5+6 -'-see Fig. '3are in substantially the same plane and located at a point considerably removed from the outer ends of the handles. A flatspring I! is fastened to the inner edge of handle II by'means of screw I8 and its upper free endis bifurcated at I9 50 as to span extension I4 and press against shoulder 20.

Slot" I3 extends clear through handle I0 and its ceiling 20 is bevelled to function as a pawl for engagement with serrations 2I disposed on the inner edge of plate I5. This plate, on its outer end, carries a thumbpiece 22 which is used for disengaging the serrations 2| and pawl 20.

In practice, thumbpiece 22 is depressed against the action of spring I! to release teeth 2I from engagement with pawl 20 and permit the gripping elements 89 to be suitably spread apart so as to embrace the particular limb. Handles I0-II are then constrained towards each other until the desired constriction of the limb is obtamed-the pawl riding over the serrations and automatically locking against reverse movement when the point of maximum constriction has been reached.

It will thus be seen that providing rectilinear handles in lieu of handles equipped with fingereyes eliminates the likelihood of the operator becoming confused with respect to the precise func-. tion of the finger-eyes. Then, too, the fact that the adjusting mechanism is located at a relatively remote pointthe outer ends of the handles-gives the operator a clear sweep in the manipulation of the instrument and insures against the possibility of ones cutting the finger tips with sharp teeth and the jagged edges of a worm wheel-it being borne in mind that in the present instance the teeth face outwardly and do not require the cooperation of any ancillary adjusting device.

In its broader aspects my invention comprises not only the various means described but equivalent means for performing the recited functions. It is desired to reserve the right to effect such modifications and variations. as may come fairly within the scope of the appended claims.

I claim:

1. A physicians and surgeons clamp tourni- 'quet including complementary members hinged "together, aid members comprising curved limbgripping elements and straight handle portions "for operating the grippingfelements, the inner terminal .oflonfe handle. havingg a slot extending ,therethrough, the innerl terminal i of th e other l handle having a recess in substantial, alignment with the slot, an arcuate ratchet "having at fend a rebated extension'and a shoulder, the en'- ltension being pivoted within the recess elf-one jl'iandl'e, a "single spring fixed. :te {the inside edge fof thela'tter handle and haying its opposite tree T terminal bifurcated and straddling the extension and engaging the shoulder, and the other end "of the ratchet passing through-the-"slotor the other handle and engageable with the inner wall thereof for locking the elements in a variety of positions, H v 2. A 'physicians and: surgeons' clamp .to1irni. quet including crossed complementary members hinged attheir point of crossing, said members comprisingcurved limb gripping elements none side ofthe pivot pointand Straight hana1e me i bers at the other .sideof the pivot point the handle. members causing .the limb encircling members .to approach each other. whenvthe handles are brought-together, the limb encircling members being ofiset with respect to each fothe'r, oneof the handle. membershaving a slot therein adjacent. the .pivot pogint with the ebp'erpnt of the slot being formed into a pawl In'emberon the outer wall of the handlemember, theother and e membr tha i' was i th ein nbe stantially in alignmentwiththe slot in the other handle, an arcuate ratchet bar having upwardly 4 extending ratchet teeth on the portion adjacent the pivot point adapted to engage the pawl, one end of the arcuate ratchet bar having a rebated extension formed thereon which is pivotally mounted in the reces of said other handle mem-- her, and a shoulder formed by the rebated portion on the side of theratchet bar opposite to ,theto6thed side,;a leatsprin'g hired to the handle member below the recess and extending substantially parallel with the handle for a greater portion of its length and then outwardly from the handle forming a free end having a bifurcation therein, thebifurcation straddling the rebated nortion -of the ratchet bar and the Web below the bifurcation engaging the shoulder of the ratchet bar and normally urging the ratchet bar upwardlya'sopthattheteeth of the ratchet bar are forced into engagement with the pawl when the handle members are moved to adjust the limbencircling members, the limb-encircling members being thiis locked in the adjusted position.

} DAVID COHEN.

v REFERENCES CITED The following'reference's are of record in the file of this patent: I

UN'ITEn s'rATEs PATENTS Number J. g g

5,...Na'me 54,285 Collins Apr. 30, 1867 127,212 lAylworth May 28, 1872 1,256,208 Cummins Feb. 12, 1918 1,506,032 Stevens Aug; 26, 1924 2,427,128 Ettii i'ger Sept. 9, 1947 PATENTS l Number .Country Date 7 748,047 France Apr. 10, 1933

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