US2421959A - Blood extractor - Google Patents

Description

June l0, 1947. E, NQRRls 2,421,959

BLOOD EXTRACTOR Filed Jan. 18, 1946 I LESslE ETHEL. NoRRls I BY Y l ATTORNEYS Patented June 10, V1947 EID-f PM i or E ica nLooD ExflitaotroitVr A LcssicfE; Norris, Atlanta; Gaf. Application January 18, 1946, Seria1No:642,0il4' (Cl. Rire-276) Mir-invention relates to blood extractors and more particularly to extractors adapted to be used in connection with a pump forming either a small separate unit driven by an electric motor or a hand operated plunger type pump connected by a tube to the extractor.

The object of my invention is to provide a simple and effective means of removing blood from congested areas.

Another object of my invention is to provide a blood extractor adapted to be used by dentists in treating diseased gums.

A further object of my invention is to provide a blood extractor adapted to be used by individuals aiiiicted with pyorrhea, diseased gums or the like wishing to treat themselves.

Other objects of my invention may appear in the following speciiication describing my invention with reference to the accompanying drawing illustrating a preferred embodiment of my invention. It is however to be understood that my invention is not to be limited or restricted to the exact construction and combination of parts described in the specification and shown in the drawing, but that such changes and modications can be made which fall within the claims appended hereto.

In the drawing:

Figure l is a side elevation of the blood extractor according to my invention attached to a hand pump of the plunger type.

Figure 2 is a longitudinal sectional View of the pump portion of Figure 1 in a larger scale.

Figure 3 is a longitudinal sectional view of the blood extractor portion of Figure 1 in the same scale as Figure 2.

Figure 4 is a sectional view taken on line 4 4 of Figure 3, and

Figure 5 is a sectional View taken on line 5 5 oi Figure 3.

Referring now in detail to the drawing the blood extractor according to my invention has a main body I of substantially cylindrical shape. At its rear end an enlarged portion I I is provided, from which a nipple I2 extends rearwardly. This nipple is adapted to receive a tube I3 thereon. A second nipple I4 extends downwardly from the enlarged body portion I2 and is provided with an external thread I5.

A passage I6 extends through the iirst nipple I2, the enlarged portion II and the cylindrical body Ill. Another passage `I'I extends upwardly through the second nipple I4 and a third passage I8 extends rearwardly from the front end of the 2 I cylindrical body I l and connects atfits-rear-end with the passage I'l in the second nipple I4.

The front end ci the cylindrical body I0 is hollowed out and has an internal thread in its hollow portion.

A cap I9 has a cylindrical main portion of the same diameter as the body I9. The rear end of said cap is reduced and has an outside thread adapted to engage the internal thread in the front end of the body Ill as shown at 20 in Figure 3. In the cap I9 a U-shaped channel 2I is provided the two ends of which are arranged at the rear end of the cap so that they communicate with the passages I6 and I8 in the body I0 when the cap is in position on said body. A bore 22 extends forwardly from the curved portion of the U-shaped channel 2l in the cap and has a counterbore 23 on its front end. This counterbore ends in an enlarged bore having an internal thread therein.

The forward end oi the cap I9 surrounding the counterbore 23 and the threaded bore may be of a smaller diameter than the main cap portion as shown at 2li.

A soft pad 25 made from any suitable material, such as rubber or the like, iits onto the front end of the cap I9 and has a threaded nipple 26 thereon adapted to engage the threaded enlarged bore in the front end of the cap as shown at 21. A centrally located hole 28 extends axially through the pad and its nipple and at its rear end a seat for a ball valve 29 is formed. This ball is arranged in the counterbore 23 and a spring 30 in said counterbore urges the ball valve onto its seat and into position to close the hole 28 in the pad 25.

That end of the U-shaped channel 2l in the cap I9 which communicates with the passage I8 in the body I'0 is provided with a counterbore 3| in which a ball valve 32 and a Spring 33 are arranged so that the spring urges the ball into position to close the channel in the cap.

A receptacle 34 has a nipple 35 on its top wall and this nipple is adapted to threadedly engage the nipple I4 on the enlarged portion II of the body I0. A vent hole 36 is provided in the tcp of the receptacle 35.

The tube I3 leads to a pump cylinder 3'I on which finger rings 38 are formed diametrically opposite to each other. A cylinder head 39 threadedly engages the pump cylinder 31. A plunger rod 40 extends through said cylinder head. At its inner end a plunger 4I of any desired conventional form is removably mounted and its outer end is shaped into a linger ring 42.

The blood extractor according to my invention can be made from any desired and suitable material such as glass, plastic, aluminum and the like.

In use the pad 25 is placed against the congested spot from which blood is to be extracted. By operating the plunger 4| in the pump a part vacuum is created in the passage I6 and the U-shaped channel 2|. The ball valve 32 is in closing position, While the ball valve 29 will be opened against the pressure of the spring 30. Blood will be sucked through the hole 28, valve 29, bore 22, channel 2| into the passage I6. By the return stroke of the plunger 4| the valve 29` Will be closed and the valve 32 will be opened and the blood in passage I6 will be forced through U-shaped channel 2|, valve 32, counterbore 3| and passages I8 and |1 into the receptacle 34.

The blood extractor as shown and described can be cheaply produced. It is easily operated and all of -its parts are accessible for the purpose of cleaning 0r the like.

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

1. A blood extractor having an orice in one of its ends communicating with a U-shaped passage arranged in and extending through said extractor, means connected with one leg of said U-shaped passage for alternately creating a suction and a pressure effect in said passage, means for closing said orifice under pressure and opening it under suction and similar means arranged in the second leg of the U-shaped passage and adapted to operate alternately with said orifice closing means.

f 2. A blood extractor as set forth in claim 1 including a soft pad removably attached to said extractor, said orifice extending through said pad.

3. A blood extractor as set forth in claim 1 including a receptacle removably attached to said extractor, said second leg of the U-shaped passage communicating with said receptacle.

LESSIE E. NORRIS.

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