US3647142A - Air gun having a safety nozzle - Google Patents

Air gun having a safety nozzle Download PDF

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Publication number
US3647142A
US3647142A US3647142DA US3647142A US 3647142 A US3647142 A US 3647142A US 3647142D A US3647142D A US 3647142DA US 3647142 A US3647142 A US 3647142A
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US
United States
Prior art keywords
head
end
body
sleeve
nozzle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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Inventor
Edward H Drude
Bennie Franklin Mangum
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SCHRADER BELLOWS Inc A CORP OF DE
Original Assignee
Scovill Inc
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Priority to US8302570A priority Critical
Application granted granted Critical
Publication of US3647142A publication Critical patent/US3647142A/en
Assigned to SCHRADER BELLOWS INC., A CORP. OF DE. reassignment SCHRADER BELLOWS INC., A CORP. OF DE. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SCOVILL INC.,
Anticipated expiration legal-status Critical
Application status is Expired - Lifetime legal-status Critical

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/005Nozzles or other outlets specially adapted for discharging one or more gases
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S239/00Fluid sprinkling, spraying, and diffusing
    • Y10S239/22Safety air nozzles

Abstract

The safety nozzle on this air gun has rearwardly directed bores having oddly-shaped rearward openings to make plugging difficult. Radial holes in a forward sleeve and a diametrically disposed pin reduce dynamic pressures and noise levels.

Description

Unite :12 States ient [151 3,647,342

Drude et al. 5] Mar. 7, 1972 [54] AIR GUN HAVING A SAFETY NOZZLE 2,645,528 7/1953 fib'rseiillil ..'2 3i436 i( Y ,465 l [72] Inventors: Edward H. Drude, Raleigh; Bennie g 934 32 2 43 Franklin Mangum Garner both of NC. p

3,363,839 1/1968 Bowman ....239/288 X [73] Assignee; Scovill Manufacturing Company, w ter- 3,599,876 8/1971 Kyburg..... ..239/291 bury, Conn. I l Primary Examiner-Allen N. Knowles [22] 1970 Assistant Examiner-Edwin D. Grant [21] Appl, No; 83,025 Attorney-Ballett Hoopes 57 52 us. Cl ..239/288.3, 239/419.5, 239/518 1 [51 1 1m Cl ..B05b 1/28 The safety nozzle on lhls w gun has reamrdly directed bores [58] Field of Search ..239/288, 288.3, 288.5, 103, having yp rearward openings to make p g 239/430 432 423.5 424 4245 419.5 51 55 ficult. Radial holes in a forward sleeve and a diametrically disposed pin reduce dynamic pressures and noise levels.

[56] Reierences Cited UNITED STATES PATENTS W 2,001,739 5/1935 MacGregor 4 Claims, 4 Drawing Figures PATENTEDMAR I972 INVENTORS EDWARD H. DRUDE BENNIE FRANKLIN MANGUM ATTORNEY- AIR GUN HAVING A SAFETY NOZZLE This invention relates to a safety air gun. More specifically, this invention relates to an unusually efiective safety nozzle which, at the same time, provides acceptable dynamic output pressures and noise levels.

With the air guns of the prior art not equipped with safety features, air discharging from the gun nozzle has accidentally propelled articles toward workmen causing injury. Injury has also been involved in the use of nonsafety guns when a workman, horsing around, has intentionally used the nozzle as a gun to project objects toward fellow workmen, or has engaged the discharged end of the nozzle with the skin or buried it in a body opening of a fellow workman causing fatal or near fatal absorption of air into the blood stream.

In the prior art, attempts to provide safety nozzles have simply involved the formation of radial openings in a barrellike discharge tube of the air gun. This expedient has not been effective in that these openings have been rather easy to plug. Such nozzles have had, in addition, the objectionable disadvantage that they have been unduly long and many have had objectionably high dynamic pressures emerging from the open end despite the provision of the safety openings. High noise level has also been an objection.

In the embodiments of the present invention, unusually effective safety means are provided in the form of rearwardly facing holes which are virtually impossible to plug. Also provided are breakup means cutting down the dynamic pressure emitted from the discharge opening as well as reducing the noise level. With these advantages is the additional benefit that embodiments under the present invention may be much shorter than the safety nozzles of the prior art.

Other objects and features will be apparent from the following specification including the drawings all of which disclose a nonlimiting example embodying the invention. In the drawings:

FIG. 1 is an elevation of an air gun equipped with a nozzle embodying the invention;

FIG. 2 is an enlarged sectional view taken on the line 22 of FIG. 1;

FIG. 3 is an enlarged sectional view taken on the line 3-3 of FIG. 1; and

FIG. 4 is an enlarged longitudinal section of the nozzle.

Referring more specifically to the drawings, an air gun equipped with a nozzle embodying the invention is generally designated in FIG. 1. The gun 12 comprises a housing 14 having an internal passage connected to a hose H. The passage internally in the gun is intercepted by a conventional transverse valve l6 and the passage terminates in an internally threaded discharge opening 18 (FIG. 4).

The nozzle 20 comprises a tubular body 22 which at one end is threaded as at 24 and engages the internal threads of the opening 18. The body is formed with an enlarged head 25 and a delivery passage 28 extends axially through the body. A plurality of bores 30 are formed in the head 26 and arranged in a circular array about the passage 28. Because the body is of reduced diameter leftward of the head 26 (FIG. 4), the bores emerge as partly circular openings where they intercept the shoulder 32 and form channels 34 in the neck of the body which terminate in beveled surfaces 36.

A tubular sleeve 38 has one end snugly embracing the head 26 in a press fit and extends out beyond the head for a distance as shown. Radial openings 40 are formed in the sleeve 38 and a diametrically disposed pin 42 is anchored in appropriate holes in the sleeve.

The advantages of the various features should be noted. An essential feature is the rearwardly directed bores 30 which, as they emerge rearward from the body 26, provide extremely difiicult orifices 32, 34, 36 to plug. Also, their rearward direction yields the additional advantage that if the entire nozzle is buried in a body opening, rearwardly directed air would emerge from the bores 30 with such force as to break any seal between the skin and the nozzle or gun. Bores 30 as well as openings 40 of course perform an aspiration function.

Because the escape bores 30 are rearwardly directed, there is no real necessity for great length as has characterized earlier air gun safety nozzles. As a result, the present nozzle, made shorter, operates at a considerably reduced noise level. Having the end of the passage 28 close to the end of the sleeve 38 does not increase substantially the dynamic pressure because of the provision of the pin 42 which breaks up the direct shot of air and diffuses it. The pin in turn does not increase the noise level because the openings 40 diffuse the shock waves.

The invention may be described in the following claim language:

I claim:

1. A safety device comprising an air gun having a valve disposed transverse to the passage of air through the gun and having a nozzle mounting about the air outlet, a safety nozzle comprising a tubular body having at one end attachment means complementing the nozzle mounting and attached thereto, the body being formed with an enlarged head on the other end and having a delivery passage extending on the axis of the body from one end to the other and a plurality of circularly arranged bores extending longitudinally of the head and disposed about the passage and extending backward to the rear face of the head, a tubular sleeve having one end snugly embracing and attached to and extending outward from the head, the sleeve having a plurality of openings therethrough adjacent the head, and a pin disposed diametrically across the sleeve to partly guard the head end of the delivery passage.

2. A safety device as described in claim 1 wherein the bores are uniform and larger in diameter than the radial enlargement of the head from the adjacent part of the body and portions of the bores extend longitudinally into the adjacent part thereby presenting holes which are difficult to plug.

3. A safety device comprising an air gun having a valve and having a nozzle mounting having the air outlet, a safety nozzle comprising a tubular body having at one end attachment means complementing the nozzle mounting and attached thereto, the body being formed with an enlarged head on the other end and having a delivery passage extending on the axis of the body from one end to the other and aplurality of circularly arranged bores extending longitudinally of the head and disposed about the passage and extending backward to the rear face of the head and continuing as channels in the portion of the body behind the head, a tubular sleeve having one end secured about and extending outward from the head, the sleeve having a plurality of openings therethrough adjacent the head. 7

4. A device as described in claim 3 wherein a pin is disposed diametrically across the sleeve to partly guard the head end of the delivery passage.

Claims (4)

1. A safety device comprising an air gun having a valve disposed transverse to the passage of air through the gun and having a nozzle mounting about the air outlet, a safety nozzle comprising a tubular body having at one end attachment means complementing the nozzle mounting and attached thereto, the body being formed with an enlarged head on the other end and having a delivery passage extending on the axis of the body from one end to the other and a plurality of circularly arranged bores extending longitudinally of the head and disposed about the passage and extending backward to the rear face of the head, a tubular sleeve having one end snugly embracing and attached to and extending outward from the head, the sleeve having a plurality of openings therethrough adjacent the head, and a pin disposed diametrically across the sleeve to partly guard the head end of the delivery passage.
2. A safety device as described in claim 1 wherein the bores are uniform and larger in diameter than the radial enlargement of the head from the adjacent part of the body and portions of the bores extend longitudinally into the adjacent part thereby presenting holes which are difficult to plug.
3. A safety device comprising an air gun having a valve and having a nozzle mounting having the air outlet, a safety nozzle comprising a tubular body having at one end attachment means complementing the nozzle mounting and attached thereto, the body being formed with an enlarged head on the other end and having a delivery passage extending on the axis of the body from one end to the other and a plurality of circularly arranged bores extending longitudinally of the head and disposed about the passage and extending backward to the rear face of the head and continuing as channels in the portion of the body behind the head, a tubular sleeve having one end secured about and extending outward from the head, the sleeve having a plurality of openings therethrough adjacent the head.
4. A device as described in claim 3 wherein a pin is disposed diametrically across the sleeve to partly guard the head end of the delivery passage.
US3647142D 1970-10-22 1970-10-22 Air gun having a safety nozzle Expired - Lifetime US3647142A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US8302570A true 1970-10-22 1970-10-22

Publications (1)

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US3647142A true US3647142A (en) 1972-03-07

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ID=22175688

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US3647142D Expired - Lifetime US3647142A (en) 1970-10-22 1970-10-22 Air gun having a safety nozzle

Country Status (11)

Country Link
US (1) US3647142A (en)
AT (1) AT310920B (en)
AU (1) AU447290B2 (en)
CA (1) CA927695A (en)
CH (1) CH522443A (en)
DE (1) DE2151829C3 (en)
DK (2) DK134847C (en)
ES (1) ES202438Y (en)
GB (1) GB1332400A (en)
IT (1) IT942727B (en)
SE (1) SE362783B (en)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3743186A (en) * 1972-03-14 1973-07-03 Src Lab Air gun
US3774847A (en) * 1972-01-17 1973-11-27 J Malec Aspirator nozzle for blow guns or the like
US3806039A (en) * 1972-03-14 1974-04-23 Src Lab Coanda type nozzle with discontinuous slot
FR2290139A1 (en) * 1974-11-07 1976-06-04 Amazonen Werke Dreyer H Machine for the pneumatic spreading a granular material
US4010902A (en) * 1975-01-30 1977-03-08 Taylor & Osborne Limited Blow guns
US4050632A (en) * 1976-09-15 1977-09-27 Gad-Jets, Inc. Low noise air nozzle
US4721249A (en) * 1986-05-19 1988-01-26 Burlington Industries, Inc. Low noise safety air nozzle
US4744516A (en) * 1985-08-22 1988-05-17 J. Wagner Gmbh Air aspirated cooling for spray guns
US5464155A (en) * 1994-01-13 1995-11-07 Schutter; Raymond A. Safety air gun
US5562251A (en) * 1993-09-03 1996-10-08 Goyen Controls & Co. Pty. Limited Gas nozzle for bag house cleaning systems
US20080290193A1 (en) * 2007-05-21 2008-11-27 Hursen Thomas F Air gun safety nozzle
US20090145665A1 (en) * 2007-12-10 2009-06-11 Hursen Thomas F Method and apparatus for selective soil fracturing, soil excavation or soil treatment using supersonic pneumatic nozzle with integral fluidized material injector
US20090223016A1 (en) * 2008-02-26 2009-09-10 Air Water Sol Inc. Gas jet nozzle
US20120318891A1 (en) * 2011-06-14 2012-12-20 Wu-Chiao Chou Siphon nozzle for air blow gun
US9855573B2 (en) 2015-01-16 2018-01-02 Thomas Francis Hursen Supersonic air knife handle
US10449557B2 (en) 2016-07-15 2019-10-22 Thomas Francis Hursen Supersonic air knife with a supersonic variable flow nozzle

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT26546T (en) * 1981-11-18 1987-05-15 Hans Moss to silent nozzle flow out of gas.
DE19543339A1 (en) * 1995-11-21 1996-09-05 Kurt Sebald Gas delivery or dispensing pistol

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2001739A (en) * 1933-10-03 1935-05-21 Standard Oil Co California Gas burner
US2645528A (en) * 1950-11-30 1953-07-14 Fairbanks Morse & Co Air nozzle device
US3260465A (en) * 1964-11-17 1966-07-12 Grumbein Raymond Gas torch
US3263934A (en) * 1965-06-02 1966-08-02 Jenkins Brothers Safety tip for pneumatic gun
US3363839A (en) * 1965-11-08 1968-01-16 Kaiser Aluminium Chem Corp Gunning nozzle shield
US3599876A (en) * 1969-06-17 1971-08-17 Henry E Kyburg Safety air gun

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2001739A (en) * 1933-10-03 1935-05-21 Standard Oil Co California Gas burner
US2645528A (en) * 1950-11-30 1953-07-14 Fairbanks Morse & Co Air nozzle device
US3260465A (en) * 1964-11-17 1966-07-12 Grumbein Raymond Gas torch
US3263934A (en) * 1965-06-02 1966-08-02 Jenkins Brothers Safety tip for pneumatic gun
US3363839A (en) * 1965-11-08 1968-01-16 Kaiser Aluminium Chem Corp Gunning nozzle shield
US3599876A (en) * 1969-06-17 1971-08-17 Henry E Kyburg Safety air gun

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3774847A (en) * 1972-01-17 1973-11-27 J Malec Aspirator nozzle for blow guns or the like
US3806039A (en) * 1972-03-14 1974-04-23 Src Lab Coanda type nozzle with discontinuous slot
US3743186A (en) * 1972-03-14 1973-07-03 Src Lab Air gun
FR2290139A1 (en) * 1974-11-07 1976-06-04 Amazonen Werke Dreyer H Machine for the pneumatic spreading a granular material
US4010902A (en) * 1975-01-30 1977-03-08 Taylor & Osborne Limited Blow guns
US4050632A (en) * 1976-09-15 1977-09-27 Gad-Jets, Inc. Low noise air nozzle
US4744516A (en) * 1985-08-22 1988-05-17 J. Wagner Gmbh Air aspirated cooling for spray guns
US4721249A (en) * 1986-05-19 1988-01-26 Burlington Industries, Inc. Low noise safety air nozzle
US5562251A (en) * 1993-09-03 1996-10-08 Goyen Controls & Co. Pty. Limited Gas nozzle for bag house cleaning systems
US5887797A (en) * 1993-09-03 1999-03-30 Goyen Controls Co Pty Ltd Bag house cleaning systems
US5464155A (en) * 1994-01-13 1995-11-07 Schutter; Raymond A. Safety air gun
US20080290193A1 (en) * 2007-05-21 2008-11-27 Hursen Thomas F Air gun safety nozzle
US8162239B2 (en) 2007-05-21 2012-04-24 Thomas Francis Hursen Air gun safety nozzle
US20090145665A1 (en) * 2007-12-10 2009-06-11 Hursen Thomas F Method and apparatus for selective soil fracturing, soil excavation or soil treatment using supersonic pneumatic nozzle with integral fluidized material injector
US8171659B2 (en) 2007-12-10 2012-05-08 Thomas Francis Hursen Method and apparatus for selective soil fracturing, soil excavation or soil treatment using supersonic pneumatic nozzle with integral fluidized material injector
US20090223016A1 (en) * 2008-02-26 2009-09-10 Air Water Sol Inc. Gas jet nozzle
JP2009226392A (en) * 2008-02-26 2009-10-08 Air Water Sol Kk Gas jet nozzle
US7971807B2 (en) * 2008-02-26 2011-07-05 Air Water Sol Inc. Gas jet nozzle
US20120318891A1 (en) * 2011-06-14 2012-12-20 Wu-Chiao Chou Siphon nozzle for air blow gun
US9855573B2 (en) 2015-01-16 2018-01-02 Thomas Francis Hursen Supersonic air knife handle
US10449557B2 (en) 2016-07-15 2019-10-22 Thomas Francis Hursen Supersonic air knife with a supersonic variable flow nozzle

Also Published As

Publication number Publication date
GB1332400A (en) 1973-10-03
AU3456471A (en) 1973-04-19
ES202438Y (en) 1976-03-01
DK134847B (en) 1977-01-31
DE2151829B2 (en) 1979-05-10
CA927695A1 (en)
IT942727B (en) 1973-04-02
DE2151829A1 (en) 1972-04-27
DK134847C (en) 1977-06-20
AU447290B2 (en) 1974-04-11
SE362783B (en) 1973-12-27
DK134847A (en)
CH522443A (en) 1972-06-30
DE2151829C3 (en) 1980-01-24
AT310920B (en) 1973-10-25
CA927695A (en) 1973-06-05
ES202438U (en) 1975-11-16

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Date Code Title Description
AS Assignment

Owner name: SCHRADER BELLOWS INC., 200 WEST EXCHANGE STREET, A

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SCOVILL INC.,;REEL/FRAME:004485/0698

Effective date: 19851028