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Publication numberUS1527291 A
Publication typeGrant
Publication dateFeb 24, 1925
Filing dateJul 9, 1923
Priority dateJul 9, 1923
Publication numberUS 1527291 A, US 1527291A, US-A-1527291, US1527291 A, US1527291A
InventorsGuillermo Zorraquin
Original AssigneeGuillermo Zorraquin
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Safety-pressure-indicating needle
US 1527291 A
Images(1)
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Description  (OCR text may contain errors)

Feb. 24, 1925. 1,527,291

G. zoRRAQLuN SAFETY PRESSURE IHDICATING NEEDLE Filed July 9, 1923 Patented Feb. 24, 1925.

UNITED STATES PATENT QFFICE.

GUILLERMO ZORRAQUIN, OF BUENOS AIB/ES, ARGENTINA.

SAFETY-PRESSURE-INDICATING NEEDLE.

Application filed July 9, 1923. Serial No. 650,531.

To aZZ whom if may conce/7%:

Be it known that I, GUILLERMO Zonna- QUIN, citizen of the Argentine Republic, and resident of No. 1167 Libertad Street, Buenos Aires, Argentine Republic., have invented certain new and useful Improvements in a Safety Pressure Indicating` Needle, of which the following is a specilication.

This invention refers to a surgical needle for the safe exploration of cavities, and has for its object an instrument provided with al blunt-pointed element which displaces without penetrating' the viscera contained in such cavities, and at the same time enables the operator to detect easily such displacement.

The instrument consists substantially of a perforating sheath in which there slides a blunt-pointed tube actuated by a spring con tained in .a tube screwed to the perforating sheath.

In the accompanying drawings Fig. 1 is an outer view;l

Fig. 2, a longitudinal section with the interior non-perforating tube;

Fig. '3, an end view of the tubular handle showing its quarter-turn screw connection; and

Fig. i is an end view of the closing screw of the sheath.

In all the figures like reference numbers indicate like or similar parts.

IV ith reference to said figures, a perforating sheath 1 with an oblique point similar to that of a common hypodermic needle, forms an integral part of a nut 2, the thread :l of which permits screwing` the same to the end of the tubular handle 4t. The thread of the nut as well as that of the handle occupy a part only of the circumference of those parts, so that they may be put together and secured liruily in position by a quarterrturn only.

Through the perfor-atingsheath 1 there passes freely the tube 5 having' a. blunt, nonperforating point. and provided with several lateral openings 6. This tube is prolonged rearwardly by another tube of greater diameter, 7. which projects from the rea-r end of the handle and has screwed to it the cap 8. A spring` 9 seated in the handle 4 pushes forward the tube '7. by means of a collar 10 forming an inteogral part of. the said tube. The forward end of the said tube 7 at the base of the small tube has theI form of a cone 11 which lits into the corresponding;` conical cavity o-f the nut 2.

The rear orifice 12 of the cap S is also conical and appropriate for receiving the tubular nozzle of a common syringe for injections.

The operation of the instrument is as follows The needle being` assembled, on pressing` the point of the instrument against the wall of the organ to be explored, the inner tube is retruded within the penetrating sheath and remains under the tension of the spring` so as to be extruded when the resistance against the point of the needle ceases after it has passed through the wallv or membrane the extension being perfectly evident to the operator by the displacement of the cap.

It is evident that various modifications may be introduced in the construction of the instrument without departing thereby from the spirit of the invention as shown in the appended claims.

Having described my invention, what I claim is 1. A surgical needle for the safe exploration of cavities such as the pleura, peritoneum, pericardium, etc., consist-ing' substantially of a perforating sheath, a tube slidable within said sheath having a blunt, non-perforating point and provided with lateral openings, a handle, and av spring'y arranged in the handle, said tube being pushed forwardly by said spring'.

2. A surgical needle of the class described a perforating sheath, a tube slidabie within said sheath having` a blunt, non-perforating` point and provided with lateral openings, a handle, a nut carried by said sheath. a quickly detachable,threaded connection between the n ut and handle, an extension car ried by said tube, a collar on said extension` and a spring;- arranged on said handle and co-acting' with the collar normally tending.` to move the tube forwardly.

Signed at Buenos Aires, Argentine Republic, this sixth day of June A. D. 1923.

GUILLERMO ZORRAQILTIN.

Referenced by
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Classifications
U.S. Classification604/158
International ClassificationA61M5/32, A61B17/34
Cooperative ClassificationA61M5/32, A61B17/3474
European ClassificationA61M5/32