US1624990A

US1624990A - Surgical syringe

Info

Publication number: US1624990A
Application number: US32599A
Authority: US
Inventors: Lemuel D Smith
Original assignee: Individual
Current assignee: Individual
Priority date: 1925-05-25
Filing date: 1925-05-25
Publication date: 1927-04-19
Anticipated expiration: 1944-04-19

Description

April 19 1927 L. D. SMITH 'SURGICAL SYRINGE Filed May 25. 1925 I IIII III I llllll .llnlldfllill Patented Apr. 19, 1927.

51T A TES LEMUEL DSMITH, OF IVIILVV'A'UKEE, WISCONSIN.

SURGICAL SYRINGE.

n Application file dgMay 25, 1925. YSerial No. v322,599.

My invention relates to surgicalsyringes lin general and particularly to surgical syrblood transfusion, and aspiration.

l ltisthe object o'limy invention. tojprovide a syringe for suc-h uses which will be simple in construction and easily sterilized l which vvwill create an even-How without variation in pressure andvvhich will have a valve construction not liable 'tostoppage lt is further my object vto provide a syringe with reversible vdischarge .and suctionelements permitting l a ywide variety ot, uses. It is urtherymy object to` construct aA syringe which'may be .continuously used as required in some surgical treatments ywithout the necessity of recharging.

The only type ofintiltration syringe now onthe market is dependent' on a suc-tion and apressure stroke for each injection and does not offer anywpossibility of continued .use suchfas. wouldfbe preferable inthe treatment of ak comparatively large area. offtissuewith novocainei or the like. Further all infiltration syringes now vin use have small valves in the end ofthe syringe casing which fequentlyV stopv up and conseqnently subject the physician to innumerable delays andthe consequent. risks tothefhealth of the patient.

The usual ltypenof aspirating syringe is dependent on the operation of small valves to control the suction and discharge which clog up and have a tendency to cause baci; pressure on the reverse stroke with the risl; to the patient incident with such bach` pressure. For blood transfusion work is exceedingly important that the operation be conducted quickly and accurately and that the blood be t-ransfused before it coagulates. Heretofore the usual type of blood transfusion apparatus has either consisted in apparatus requiring a treatment of the blood to prevent coagulation, because of the length of time required to operate the apparatus, or it has depended for its operation on the transfer ot' the blood from one cylinder to another or the manipula-ting of valve control handles.

ln a syringe made in accordance with my invention it is my object to provide ease of operation. positiveness of action, and such even regulation of pressures within the syringe that results in all of the aforementioned inges such as may be used. for infiltration,

treatments, hitherto impossible, may be accomplished,

Referring to thel drawings:

Figure l represents a side elevation of a preferred type of :syringe i i AFigure Qis a cross section longitudinally through'the syringe illustrated in Fi ure l.

, igure 3 is a detailvsection showing aball valve modilication of the conicall poppet valveconstruction. l 'l' Generally Aindicated at l is the graduated cylinder forming the side-walls ot'lthelg'suetion and compression chamber which ymay be made ovglass, as indicated ortm'etal depending yon the particular requirements ot itsvuse. ik plunger rod Qfwithia handle 3 moves longitudinally *through the cylinder. Eaclrend ot the cylinderis provided with llanges l preferably ofnietal whichI are: se-

curedy to the glass byy compression or'ztlre usefot"cementitious material. "lheflange at the. plunger en'dyis providedwith approjecti ing pin 5 which engages a spiral slot 6in a cap which fits over rthe flange and securesl to the cylinder the head member-S which lits within the cylinder and has. an integral sleeve 9 extended away from the,cylinder.` rllhis sleeve is machined preferably to a sliding lit aboutI the lplungerrod sothatithere will be no necessity ot providing apacliing box which would be diiiicult to sterilize properly,

The plunger rod has a. piston head ll) secured to the end and it is disposed within a sliding valve ll of equivalent diameter as that of the inner side of the cylinder. The valve has a ground `face l2 with which the piston head engages when the plunger is pulled back. The valve is hollow as indic-ated at 13 and a peripheral groove il in the end opposed to 'the piston engagement end is adapted to abuta spider l5 or other projection secured to the plunger rod.

A. modification illustrated in Figure S is preferable from the point ot` view oi manufacturing cost. In this modification the piston head l() is supported on the end of the rod 2 by curved spider arms l5 and a ball. 15b retained between the spider and the piston head seats in a concentric beveled face 15C in the piston head.

rlhe operation of the syringe Will be at once apparent. Pulling the plunger handle away from the cylinder will result in draw- (Ill ing in liquid into the cylinder through an opening in the bottom flange. After the cylinder is filled a reverse stroke of the plunger handle will result in the piston plunger moving inwardly enough to clear the opening in the valve, and the valve being forced down with the piston when the spider on the plunger rod abuts the groove in the valve. rllhe liquid which has thus been transferred 'from one side of the valve to the other will be discharged from the cylinder' through an aperture 17 in the head Lenclosing the plunger end of the syringe.

rllhe operation otl the syringe` after the 'irst charge has been drawn in, may be carried on indelinitely and with the large aperture in the valve it will further be apparent that there will be no tendency to create back pressure.

To reverse the action of the syringe all that is necessary is to use the tubes which are preferably attached to the ends ot the Aflanges in reversed position. A further modilication of the syringe illustrated is to provide a piston head which has instead ot a spider on the plunger side ot the valve a spider on the other side of the valve so that the movement oi.l the plunger into the cylinder will force liquid out through the aperture on the end opposite the plunger. This modilication is preferable for some uses as the hand in moving the plunger inwardly has a tendency to move more evenly than when pulling out on the plunger and for uses requiring a very even discharge the latter arrangement is less subject to variation.

Various modification of structure will occur to those skilled in the art without departing from the constructive principle involved.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

l. ln a surgical syringe, a hollow cylinder and a plunger rod with means for retaining the plunger rod slidably within the cylinder anda hollow member adapted to slide within the cylinder and to form a conipressiontight joint between its outer walls and the inner walls of the cylinder, and the rod adapted to retain the member and a valve element adapted to form a compression tight oint with the member with movement oi the rod in one direction, and to be retained with a loose joint with n'iovement in the opposite direction with a valveless opening in one end of the cylinder adapted to act as an inlet suction and a valveless opening in the other end adapted to act as a discharge from the cylinder.

2. ln a surgical syringe, a hollow cylinder and a plunger rod with means for retaining the plunger rod slidably Within the cylinder, and a hollow member adapted to slide within the cylinder and to form a compression tight joint between its outer walls and the inner walls ot the cylinder, a valve element, and the rod adapted to seat said element against the member with movement of a rod in one direction, and tocarry the element with a loose joint with movement in the opposite direction, with a valveless opening in one end of the cylinder adapted to act as an inletsuction and a valveless opening in the other end adapted to act as a discharge from the cylinder and one of the ends ot' the cylinder adapted to be removably connected whereby the plunger rod and the valve may be withdrawn from the cylinder.

LEMUEL D. SMITH.