US1943187A - Blowgun - Google Patents

Description

Jan. 9, 1934. D, RE VLEY ET AL 1,943,187

BLOWGUN Filed July 14, 1932 Inventor 26M a? P6 V/ey flttorney Patented Jan. 9, 1934 UNITED STATES PATENT OFFICE BLOWGUN Application July 14, 1932. Serial No. 622,548

1 Claim.

The present invention relates to a blow gun and has for its primary object to provide, in a manner as hereinafter set forth, a device of this character embodying a novel construction, combination and arrangement of parts, by means of which a comparatively large volume of air will be brought into use through the medium of a comparatively small volume of air under pressure.

Other objects of the invention are to provide a 3;; blow gun of the aforementioned character which will be simple in construction, strong, durable, highly eflicient and reliable in use, compact, light in weight and which may be manufactured at low cost.

1 All of the foregoing and still further objects and advantages of the invention will become apparent from a study of the following specification, taken in connection with the accompanying drawing wherein like characters of reference designate corresponding parts throughout the several views, and wherein:-

Figure l is a view in end elevation of a blow gun constructed in accordance with the present invention.

5 Figure 2 is a view in longitudinal section through the blow gun, taken substantially on the line 2-2 of Figure 1.

Figure 3 is a fragmentary view in longitudinal section, taken substantially on the line 33 of Figure 1.

Referring now to the drawing in detail, it will be seen that the embodiment of the present invention which has been illustrated comprises an elongated, tubular barrel 1 of any suitable material, preferably metal, which is open at both ends. The intake end of the barrel 1 is enlarged or flared, as at 2.

Projecting centrally into the flared intake end portion 2 of the barrel 1 is an air nozzle 3 having a bore 4 which is reduced toward its discharge end, as clearly seen in Figure 2 of the drawing for discharging a jet of air under considerable pressure into the barrel 1. Webs 5, of substantially T-shaped cross section as seen in Figure 3 of the drawing, are provided for supporting the nozzle 3 in position relative to the barrel 1. The barrel 1, the webs 5 and the nozzle 3 are preferably integral, as illustrated.

The intake end portion of the jet nozzle 3 is counterbored and internally threaded, as at 6, for connection with a hose or other suitable flexible conduit for connecting the blow gun with a source of air supply.

In use, the jet of air under pressure which is discharged into the barrel 1 from the nozzle 3 draws a comparatively large volume of air into the barrel from the atmosphere through the enlarged or flared end portion 2 of said barrel. 7 Thus, large areas may be blown effectively with a minimum of compressed air and in a minimum of time.

It is believed that the many advantages of a blow gun constructed in accordance with the 7 present invention will be readily understood, and although the preferred embodiment of the invention is as illustrated and described, it is to be understood that changes in the details of construction and in the combination and arrangement of parts may be resorted to which will fall within the scope of the invention as claimed.

What is claimed is:

A blow gun comprising an elongated, tubular barrel including a substantially flared end por- 35 tion, the rest of the barrel being substantially of uniform diameter, said barrel being open at both ends, a nozzle projecting centrally into the flared end portion of the barrel, the bore of the nozzle being tapered toward its discharge end, the outer 96 end portion of the nozzle being counterbored and internally threaded for connection with an air supply conduit, and integral circumferentially spaced webs extending between the nozzle and the flared end portion of the barrel for mounting the nozzle in spaced relation to the barrel.

DAVID G. RE VLEY. JAY E. HIRSH.

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