US3599876A - Safety air gun - Google Patents

Safety air gun Download PDF

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Publication number
US3599876A
US3599876A US834128A US3599876DA US3599876A US 3599876 A US3599876 A US 3599876A US 834128 A US834128 A US 834128A US 3599876D A US3599876D A US 3599876DA US 3599876 A US3599876 A US 3599876A
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Prior art keywords
air
sleeve
outlet chamber
outer end
housing
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Expired - Lifetime
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US834128A
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Henry E Kyburg
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/005—Nozzles or other outlets specially adapted for discharging one or more gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/14—Arrangements for preventing or controlling structural damage to spraying apparatus or its outlets, e.g. for breaking at desired places; Arrangements for handling or replacing damaged parts
    • B05B15/16—Arrangements for preventing or controlling structural damage to spraying apparatus or its outlets, e.g. for breaking at desired places; Arrangements for handling or replacing damaged parts for preventing non-intended contact between spray heads or nozzles and foreign bodies, e.g. nozzle guards
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S239/00—Fluid sprinkling, spraying, and diffusing
    • Y10S239/22—Safety air nozzles

Definitions

  • a safety air gun having a nozzle unit which protects the nozzle tip against direct contact, has pressure-reducing vents in its end surface to produce a safe pressure thereat and provides a protective air curtain or screen extending therefrom to protect against flyback.
  • I SAFETY AIR GUN The present invention is an improvement over US. Pat No. 2,917,244.
  • the nozzle tip is exposed and direct contact thereof with the users skin may cause serious injury.
  • the device provides a swirling shield of greater pressure than at the nozzle tip to move the chips and the like forwardly.
  • the nozzle unit on the safety air gun is formed with a sleeve which surrounds the nozzle tip and prevents direct contact therewith and has vent notches in the end of the sleeve to reduce the air pressure at the end of the unit to a safe value.
  • the nozzle unit has channels extending from the outlet chamber of the gun to receive air therefrom, which channels have outwardly curved end portions for directing the air laterally to form a safety curtain to protect the user from the flyback particles.
  • FIG. 1 is a side view, partly in section, of the invention.
  • FIG. 2 is a sectional view taken along line 2-2 of FIG. 1.
  • FIG. 3 is a side view of the nozzle unit.
  • FIG. 4 is an end view of FIG. 3 looking from the left.
  • FIG. 5 is an end view of FIG. 3 looking from the right.
  • a housing !0 is provided with an inlet passage 11 to be connected by a hose 12 to a suitable source of air under pressure (not shown).
  • the housing has an outlet chamber 14 to be connected by passage 15 to the inlet passage 11 through a manually operated valve 16.
  • the housing 10 is pistol shaped with inlet passage 11 in the grip portion 100, the outlet chamber in the barrel portion 10b and the valve actuated by a manually actuated trigger 17.
  • the outlet chamber 14 opens on the end of the body and receives a nozzle unit 18 therein.
  • the nozzle unit 18 is a sleeve having the outer surface of the inner end 20 engaging the walls of the outlet chamber and an enlarged outer end 21 forming a shoulder 22 about midway of the unit engaging the end of the housing.
  • the sleeve has a rear bore 23 communicating with the outlet chamber and an enlarged forward bore 24 extending to the end of the sleeve.
  • the rear bore carries a nozzle tip 25 threaded therein'and projecting into the enlarged bore 24 and which reduces the pressure of the air feeding through the device.
  • the forward end 21 of the sleeve projects beyond the nozzle tip and prevents accidental direct contact with the air under pressure emerging from the tip.
  • the end of the sleeve is provided with a plurality of vent notches 26 which terminate outwardly of the tip and which act to further reduce the pressure at the end of the unit to a safe value.
  • the inner end 20 of the sleeve is provided with a plurality of axially extending channels 27, preferably parallel to each other and to the axis of the noule unit, with each channel communicating with the outlet chamber and extending into the enlarged outer end and terminating in an outwardly curved end surface 28.
  • These channels tend to reduce the air pressure in the outlet chamber 14 and the curved end surfaces of the channels direct the air outwardly of the gun.
  • the preferred arrangement has a plurality of channels 27 disposed on the top of the end member (FIG. 5) so that the air from the outlet chamber which is deflected outwardly forms an air screen or barrier to protect the user from flyback particles.
  • air at about psi. is fed to the inlet passage.
  • This air is reduced to about 60 psi. as it goes into the large outlet chamber.
  • the longitudinal passages 27 further reduce the pressure in the outlet chamber.
  • the vent notches in the forward end of the unit further reduce the pressure to a substantial degree so that it IS a safe pressure at the end ofthe unit.
  • the safety of the air gun is enhanced by the construction of the present invention wherein the nozzle tip is protected from direct contact by the forwardly projecting outer end of the sleeve, the air pressure is reduced in successive steps so as to provide a velocity which is sufficiently strong to clean and yet be of a safe value is present at the outer end of the nozzle unit, and an air screen is provided to protect the user.
  • a safety air gun having a housing, an air inlet port to be connected to a supply of air under pressure, said housing having an outlet chamber and a manually actuated valve disposed between the inlet port and outlet chamber to control the flow of air therebetween, and a nozzle unit secured in the outlet chamber to direct air therefrom
  • said nozzle unit comprises a sleeve having an inner end secured in the outlet chamber and an enlarged outer end forming a shoulder engaging the end of the housing, said inner end having a bore carrying a nozzle tip opening into an enlarged bore in said enlarged outer end of the sleeve, the outer end of the sleeve having a plurality of venting notches extending inwardly and terminating outwardly of said tip, and said sleeve having a plurality of longitudinal parallel slots on the upper surface of the inner end terminating in an outwardly curved surface in the enlarged outer end to receive air from the outlet chamber with the curved surfaces directing the air outwardly from the slee

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  • Nozzles (AREA)

Abstract

A safety air gun having a nozzle unit which protects the nozzle tip against direct contact, has pressure-reducing vents in its end surface to produce a safe pressure thereat and provides a protective air curtain or screen extending therefrom to protect against flyback.

Description

United States Patent [72] Inventor Henry E. Kyburg 526 Beach Road, Fairfield, Conn. 06430 [2 1] App]. No. 834,128 [22] Filed June 17, 1969 [45] Patented Aug.l7, 1971 [54] SAFETY AIR GUN 1 Claim, 5 Drawing Figs.
[52] US. Cl 239/291, 239/498, 239/526 [51] Int. Cl B05b 1/28 [50] Field of Search 239/291, 295,525, 526, 299,498,518,597;222/402.22
[56] References Cited UNITED STATES PATENTS I 2,889,086 6/1959 Collins ZZZ/402. 22
28 0/ 4m! X\TQ II,IIIIIIIIIII 26' /4 \\\\\\\1.=;;
Primary Examiner-Lloyd L. King Assistant Examiner-Thomas C. Culp, Jr. Attorney-Johnson & Kline ABSTRACT: A safety air gun having a nozzle unit which protects the nozzle tip against direct contact, has pressure-reducing vents in its end surface to produce a safe pressure thereat and provides a protective air curtain or screen extending therefrom to protect against flyback.
I SAFETY AIR GUN The present invention is an improvement over US. Pat No. 2,917,244. In the patented construction the nozzle tip is exposed and direct contact thereof with the users skin may cause serious injury. Also, the device provides a swirling shield of greater pressure than at the nozzle tip to move the chips and the like forwardly.
In accordance with the present invention the nozzle unit on the safety air gun is formed with a sleeve which surrounds the nozzle tip and prevents direct contact therewith and has vent notches in the end of the sleeve to reduce the air pressure at the end of the unit to a safe value.
Further, the nozzle unit has channels extending from the outlet chamber of the gun to receive air therefrom, which channels have outwardly curved end portions for directing the air laterally to form a safety curtain to protect the user from the flyback particles.
Other features and advantages of the invention will be apparent from the specification and claims when considered in connection with the accompanying drawing in which:
FIG. 1 is a side view, partly in section, of the invention.
FIG. 2 is a sectional view taken along line 2-2 of FIG. 1.
FIG. 3 is a side view of the nozzle unit.
FIG. 4 is an end view of FIG. 3 looking from the left.
FIG. 5 is an end view of FIG. 3 looking from the right.
As shown in the drawings, a housing !0 is provided with an inlet passage 11 to be connected by a hose 12 to a suitable source of air under pressure (not shown). The housing has an outlet chamber 14 to be connected by passage 15 to the inlet passage 11 through a manually operated valve 16. Preferably, the housing 10 is pistol shaped with inlet passage 11 in the grip portion 100, the outlet chamber in the barrel portion 10b and the valve actuated by a manually actuated trigger 17. The outlet chamber 14 opens on the end of the body and receives a nozzle unit 18 therein.
As shown, the nozzle unit 18 is a sleeve having the outer surface of the inner end 20 engaging the walls of the outlet chamber and an enlarged outer end 21 forming a shoulder 22 about midway of the unit engaging the end of the housing.
The sleeve has a rear bore 23 communicating with the outlet chamber and an enlarged forward bore 24 extending to the end of the sleeve. The rear bore carries a nozzle tip 25 threaded therein'and projecting into the enlarged bore 24 and which reduces the pressure of the air feeding through the device.
The forward end 21 of the sleeve projects beyond the nozzle tip and prevents accidental direct contact with the air under pressure emerging from the tip. The end of the sleeve is provided with a plurality of vent notches 26 which terminate outwardly of the tip and which act to further reduce the pressure at the end of the unit to a safe value.
Further, the inner end 20 of the sleeve is provided with a plurality of axially extending channels 27, preferably parallel to each other and to the axis of the noule unit, with each channel communicating with the outlet chamber and extending into the enlarged outer end and terminating in an outwardly curved end surface 28. These channels tend to reduce the air pressure in the outlet chamber 14 and the curved end surfaces of the channels direct the air outwardly of the gun. As illustrated, the preferred arrangement has a plurality of channels 27 disposed on the top of the end member (FIG. 5) so that the air from the outlet chamber which is deflected outwardly forms an air screen or barrier to protect the user from flyback particles.
For example, air at about psi. is fed to the inlet passage. This air is reduced to about 60 psi. as it goes into the large outlet chamber. The longitudinal passages 27 further reduce the pressure in the outlet chamber. The air, as it passes through the nozzle tip from the outlet chamber, goes into the enlarged bore 24 of the nozzle unit providing the required velocity which is effective as a cleaning medium. The vent notches in the forward end of the unit further reduce the pressure to a substantial degree so that it IS a safe pressure at the end ofthe unit.
From the foregoing it will be seen that the safety of the air gun is enhanced by the construction of the present invention wherein the nozzle tip is protected from direct contact by the forwardly projecting outer end of the sleeve, the air pressure is reduced in successive steps so as to provide a velocity which is sufficiently strong to clean and yet be of a safe value is present at the outer end of the nozzle unit, and an air screen is provided to protect the user.
Variations and modifications may be made within the scope of the invention and portions of the improvements may be used without others.
lclaim:
1. In a safety air gun having a housing, an air inlet port to be connected to a supply of air under pressure, said housing having an outlet chamber and a manually actuated valve disposed between the inlet port and outlet chamber to control the flow of air therebetween, and a nozzle unit secured in the outlet chamber to direct air therefrom, the improvement wherein said nozzle unit comprises a sleeve having an inner end secured in the outlet chamber and an enlarged outer end forming a shoulder engaging the end of the housing, said inner end having a bore carrying a nozzle tip opening into an enlarged bore in said enlarged outer end of the sleeve, the outer end of the sleeve having a plurality of venting notches extending inwardly and terminating outwardly of said tip, and said sleeve having a plurality of longitudinal parallel slots on the upper surface of the inner end terminating in an outwardly curved surface in the enlarged outer end to receive air from the outlet chamber with the curved surfaces directing the air outwardly from the sleeve to form a protective air barrier against flyback particles.

Claims (1)

1. In a safety air gun having a housing, an air inlet port to be connected to a supply of air under pressure, said housing having an outlet chamber and a manually actuated valve disposed between the inlet port and outlet chamber to control the flow of air therebetween, and a nozzle unit secured in the outlet chamber to direct air therefrom, the improvement wherein said nozzle unit comprises a sleeve having an inner end secured in the outlet chamber and an enlarged outer end forming a shoulder engaging the end of the housing, said inner end having a bore carrying a nozzle tip opening into an enlarged bore in said enlarged outer end of the sleeve, the outer end of the sleeve having a plurality of venting notches extending inwardly and terminating outwardly of said tip, and said sleeve having a plurality of longitudinal parallel slots on the upper surface of the inner end terminating in an outwardly curved surface in the enlarged outer end to receive air from the outlet chamber with the curved surfaces directing the air outwardly from the sleeve to form a protective air barrier against flyback particles.
US834128A 1969-06-17 1969-06-17 Safety air gun Expired - Lifetime US3599876A (en)

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Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3647142A (en) * 1970-10-22 1972-03-07 Scovill Manufacturing Co Air gun having a safety nozzle
US3670967A (en) * 1971-03-11 1972-06-20 Graco Inc Sanitary spray gun
US3672575A (en) * 1971-02-01 1972-06-27 Hydro Services Inc Hydro blast saf-t-gun
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
US3811622A (en) * 1972-11-06 1974-05-21 L Blatt Air blow gun for chip and debris cleaning
US3814329A (en) * 1972-12-04 1974-06-04 J Clark Pressure reducing nozzles for pressure guns
US4025045A (en) * 1975-07-21 1977-05-24 Spray Tech Corporation Nozzle guard for airless spray pistols
US4036438A (en) * 1975-07-21 1977-07-19 Sperry Tech Corporation Anti-injection paint spray nozzles
US4128209A (en) * 1977-09-12 1978-12-05 Scovill Manufacturing Company Air gun
US4243178A (en) * 1979-02-16 1981-01-06 John F. Schenck, III Air gun with safety nozzle
US4628644A (en) * 1984-01-05 1986-12-16 Steven Somers Abrasive material spraying apparatus
US4685621A (en) * 1986-03-24 1987-08-11 Graco, Inc. Accumulation resistant tip guard
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
US4919334A (en) * 1989-01-19 1990-04-24 Dynaquip Controls Corporation Blow gun assembly
US5170943A (en) * 1990-06-21 1992-12-15 M-B-W Inc. High velocity pneumatic device
US5176327A (en) * 1990-06-20 1993-01-05 Spraying Systems Co. Trigger operated spray gun
US5533674A (en) * 1993-07-01 1996-07-09 Herberts Gmbh Drying nozzle
US6213411B1 (en) * 1999-07-09 2001-04-10 Wuu-Cheau Jou Inlet of blow gun
US6264115B1 (en) 1999-09-29 2001-07-24 Durotech Company Airless reversible spray tip
US6354538B1 (en) * 1999-10-25 2002-03-12 Rohr, Inc. Passive control of hot air injection for swirling rotational type anti-icing system
US20030205627A1 (en) * 2002-05-06 2003-11-06 Ming-Yen Wu Water adjustable trigger nozzles
US20040222320A1 (en) * 2003-05-08 2004-11-11 Sheng-Li Wu Water sprayer having a flow control device
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
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

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2320964A (en) * 1942-10-27 1943-06-01 Harry A Yates Safety air nozzle
US2597573A (en) * 1949-10-03 1952-05-20 Groff Jerald S De Spraying apparatus
US2604361A (en) * 1946-04-13 1952-07-22 Harry A Yates Air gun
US2783092A (en) * 1956-05-17 1957-02-26 Linus A Gavin Air gun
US2889086A (en) * 1955-05-02 1959-06-02 Pressure Dispensers Inc Dispensing valve with stem sealing means
US2917244A (en) * 1957-08-29 1959-12-15 Ralph L Gould Safety air gun
US3318534A (en) * 1965-06-07 1967-05-09 Stolteben Jack Air nozzle
US3321141A (en) * 1965-10-22 1967-05-23 Blaine B Gemeny Adjustable lawn sprinkler

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2320964A (en) * 1942-10-27 1943-06-01 Harry A Yates Safety air nozzle
US2604361A (en) * 1946-04-13 1952-07-22 Harry A Yates Air gun
US2597573A (en) * 1949-10-03 1952-05-20 Groff Jerald S De Spraying apparatus
US2889086A (en) * 1955-05-02 1959-06-02 Pressure Dispensers Inc Dispensing valve with stem sealing means
US2783092A (en) * 1956-05-17 1957-02-26 Linus A Gavin Air gun
US2917244A (en) * 1957-08-29 1959-12-15 Ralph L Gould Safety air gun
US3318534A (en) * 1965-06-07 1967-05-09 Stolteben Jack Air nozzle
US3321141A (en) * 1965-10-22 1967-05-23 Blaine B Gemeny Adjustable lawn sprinkler

Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3647142A (en) * 1970-10-22 1972-03-07 Scovill Manufacturing Co Air gun having a safety nozzle
US3672575A (en) * 1971-02-01 1972-06-27 Hydro Services Inc Hydro blast saf-t-gun
US3670967A (en) * 1971-03-11 1972-06-20 Graco Inc Sanitary spray gun
US3774847A (en) * 1972-01-17 1973-11-27 J Malec Aspirator nozzle for blow guns or the like
US3743186A (en) * 1972-03-14 1973-07-03 Src Lab Air gun
US3806039A (en) * 1972-03-14 1974-04-23 Src Lab Coanda type nozzle with discontinuous slot
US3811622A (en) * 1972-11-06 1974-05-21 L Blatt Air blow gun for chip and debris cleaning
US3814329A (en) * 1972-12-04 1974-06-04 J Clark Pressure reducing nozzles for pressure guns
US4025045A (en) * 1975-07-21 1977-05-24 Spray Tech Corporation Nozzle guard for airless spray pistols
US4036438A (en) * 1975-07-21 1977-07-19 Sperry Tech Corporation Anti-injection paint spray nozzles
US4128209A (en) * 1977-09-12 1978-12-05 Scovill Manufacturing Company Air gun
FR2402490A1 (en) * 1977-09-12 1979-04-06 Scovill Manufacturing Co GUN FOR BLOWING COMPRESSED AIR
US4243178A (en) * 1979-02-16 1981-01-06 John F. Schenck, III Air gun with safety nozzle
US4628644A (en) * 1984-01-05 1986-12-16 Steven Somers Abrasive material spraying apparatus
US4744516A (en) * 1985-08-22 1988-05-17 J. Wagner Gmbh Air aspirated cooling for spray guns
US4685621A (en) * 1986-03-24 1987-08-11 Graco, Inc. Accumulation resistant tip guard
US4721249A (en) * 1986-05-19 1988-01-26 Burlington Industries, Inc. Low noise safety air nozzle
US4919334A (en) * 1989-01-19 1990-04-24 Dynaquip Controls Corporation Blow gun assembly
US5176327A (en) * 1990-06-20 1993-01-05 Spraying Systems Co. Trigger operated spray gun
US5170943A (en) * 1990-06-21 1992-12-15 M-B-W Inc. High velocity pneumatic device
US5533674A (en) * 1993-07-01 1996-07-09 Herberts Gmbh Drying nozzle
US6213411B1 (en) * 1999-07-09 2001-04-10 Wuu-Cheau Jou Inlet of blow gun
US6264115B1 (en) 1999-09-29 2001-07-24 Durotech Company Airless reversible spray tip
US6390386B2 (en) 1999-09-29 2002-05-21 Durotech Company Airless reversible spray tip
US6354538B1 (en) * 1999-10-25 2002-03-12 Rohr, Inc. Passive control of hot air injection for swirling rotational type anti-icing system
US20030205627A1 (en) * 2002-05-06 2003-11-06 Ming-Yen Wu Water adjustable trigger nozzles
US6702206B2 (en) * 2002-05-06 2004-03-09 Ming-Yen Wu Water adjustable trigger nozzles
US20040222320A1 (en) * 2003-05-08 2004-11-11 Sheng-Li Wu Water sprayer having a flow control device
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
US9855573B2 (en) 2015-01-16 2018-01-02 Thomas Francis Hursen Supersonic air knife handle
US10603780B2 (en) 2015-01-16 2020-03-31 Thomas Francis Hursen Adjustable handle assembly
US10449557B2 (en) 2016-07-15 2019-10-22 Thomas Francis Hursen Supersonic air knife with a supersonic variable flow nozzle

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