US3884419A - Blow guns - Google Patents

Blow guns Download PDF

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Publication number
US3884419A
US3884419A US380120A US38012073A US3884419A US 3884419 A US3884419 A US 3884419A US 380120 A US380120 A US 380120A US 38012073 A US38012073 A US 38012073A US 3884419 A US3884419 A US 3884419A
Authority
US
United States
Prior art keywords
valve
chamber
piston
nozzle
push rod
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
Application number
US380120A
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English (en)
Inventor
Jean-Pierre Geoffray
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GEOFFRAY JEAN#PIERRE
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Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3884419A publication Critical patent/US3884419A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K21/00—Fluid-delivery valves, e.g. self-closing valves
    • F16K21/04—Self-closing valves, i.e. closing automatically after operation
    • 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

  • the compressed air pressure available for supplying apparatus of the type in question is generally too high for obtaining thedesired jet of air.
  • it is necessary either to provide a special feed apparatus, for example with. a pressure regulator interposed between the source of compressed air and the pipes to which the blow-gunsare connected, or to provide each apparatus with a device producing a pressure drop through a cali bratedaperture or the like.
  • the first solution complicates the apparatus in the workshops concerned, whilst the second gives only imperfect results, a device having a pressure drop being able to ensure a predetermined outlet pressure solely for precise values of the upstream pressure and of the rate of flow.
  • the invention intends to remedy the preceding drawbacks andto provide a blow-gun which is able to produce a jet of compressed air or other fluid under pressure which in practice depends neither on the rate of flow, nor on the pressure in the pipe supplying the apparatus.
  • the gun or blow-gun according to the invention is characterised in that it comprises a pressure regulator incorporated directly therein.
  • the pressure regulator may comprise an elastically deformable membrane attached to a valve co-operating with a fixed seat, said membrane being subjected, on the one hand, on one side to the downstream pressure, on the other hand, on its opposite side to the combined action of atmospheric pressure and of a calibrated spring bearing against a plate or movable control member.
  • the pressure sensitive member associated with the calibrated spring is constituted by a tubular piston provided with a seat for the closure valve, which valve is in turn connected to a control member.
  • the pressure regulator is preferably combined with the lever or trigger actuating system of the gun such that it is possible for the operator to regulate the effective pressure of the jet by actuating the customary lever or trigger which thus forms the above-said control member.
  • FIG. I is a general axial section of the gun.
  • FIG. 2 shows in perspective, the inner end of one of the two parts forming the body of this gun.
  • FIG. 3 is a cross-section on line IIllIl (FIG. 1).
  • the body of the gun illustrated in FIG. 1 is constituted by two parts 1 and 2 of circular section, connected by screwing at 3 so that they are air-tight.
  • the part 1 comprises an axial bore la whose ends open respectively into an inner chamber 2a of the part 2 and into a central aperture 119 of the part 1; the walls of the aperture lb define a type of clevis inside which is engaged the heel 4a of an operating lever or trigger 4 pivoted at 5.
  • the heel 40 has a shape such that when it is tilted, it ensures the axial control of a cylindrical pushrod 6 slidably engaged in the bore 1a in an air-tight manner; it will be noted that the push-rod 6 is integral with a tubular shank 6a whose inner space is connected to a channel 6b provided in said push-rod and opening into the aperture 1b.
  • the tubular shank 6a of the push-rod 6 is engaged with considerable annular clearance inside a piston 7 which is also tubular; two gaskets 8 ensure the seal of the piston 7 sliding inside a part or cup 9 which is kept axially stationary in the chamber 20, said piston being urged in the direction of the aperture lb by a calibrated spring 10.
  • the lateral wall of the cup 9 is provided with an aperture 9a located opposite a groove 2b providedin the chamber 2a, which groove opens externally to facilitate the free sliding of the piston 7.
  • the chamber 2a is connected to a second chamber 20 of smaller diameter, inside which is mounted a valve 11 of square section (FIG. 3).
  • This valve 11 comprises a metal sleeve in which is retained a seal intended to bear against the free end or seat of the piston 7 under the action of a spring 12.
  • the chamber 20 is connected by a filter 13 to the inner space of a connection 14 facilitating the attachment of a flexible pipe 15 supplied with air under pressure.
  • the part 1 On each side of the opening of the bore 1a, the part 1 is provided with a notch 10 (FIG. 2) into which opens one of the two longitudinal channels la which extend forwards on either side of the axial bore la and central aperture 1b in order to ensure the connection of the chamber 2a to the front end of said part 1, Screwed into the latter is a nozzle or nose-piece 16 comprising an axial mouth-piece 16a for the discharge of compressed air passing through the two channels 1d.
  • a nozzle or nose-piece 16 comprising an axial mouth-piece 16a for the discharge of compressed air passing through the two channels 1d.
  • the high pressure compressed air thus fills the space in the chamber 2a comprised between the end of the part 1 and the piston 7 such that the latter moves back against the action of its spring 10 and thus moves towards the valve 11, reducing the free section for the flow between the seat and the valve.
  • equilibrium is achieved which finally depends solely on the position of the push-rod 6, i.e. on the movement of the lever 4.
  • a screw 17 engaged in this lever 4 makes it possible to regulate the end of stroke position of said lever, i.e. the maximum pressure prevailing in the mouthpiece 16a.
  • this maximum pressure is independent of the rate of flow and consequently of the section of the nozzles or nose-pieces 16 which the apparatus may comprise; it is retained when the outlet of the latter is blocked and it in no way depends on the upstream pressure such that it is in no way affected by variations of the latter.
  • the pressure-sensitive member constituted by the piston 7 moves beyond the normal position for closing the valve 11 such that the end of the tubular shank 6a of the push-rod 6 is uncovered to ensure decompression in said mouth-piece.
  • the lever 4 may be controlled cyclically by means of a cam or similar member.
  • the body of the apparatus may be shaped in the manner of a gun, the lever 4 having the shape of a real trigger.
  • this lever or trigger may be replaced by a simple adjustable screw acting on the push-rod 6, the control of the emission of the jet thus being directly placed under the dependence of the supply of the pipe 15.
  • a blow gunfor delivering a jet of compressed air from an air inlet through a nozzle comprising:
  • a body supporting said nozzle at its front end and having at its rearend said compressed air inlet, and the. body having a central portion including a first chamber 7 communicating at its forward end through channel means with said nozzle, and the body furtherincluding a second chamber behind the first chamber and communicating with said air inlet, thechambers being axially aligned and joined by a passage;
  • a hollow piston member axially slidable in sealing engagement in the first chamber and extending through said-passage into said second chamber, the piston having an opening therethrough and having a rearwardly facing valve seat in the opening;
  • a calibrated spring in the first chamber and yieldably urging said piston forwardly therein toward the nozzle;
  • manually operated means carried by the body and operative when actuated to displace the push rod rearwardly to displace the valve, whereby air under pressure passes through the hollow piston into the first chamber forward of the piston and displaces the piston rearwardly to modulate the valve opening when the force of the air pressure on the piston exceeds the force of the calibrated spring, thereby to regulate the pressure of the air delivered to the nozzle.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nozzles (AREA)
  • Coating Apparatus (AREA)
US380120A 1972-07-19 1973-07-17 Blow guns Expired - Lifetime US3884419A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7226781A FR2193458A5 (enrdf_load_stackoverflow) 1972-07-19 1972-07-19

Publications (1)

Publication Number Publication Date
US3884419A true US3884419A (en) 1975-05-20

Family

ID=9102341

Family Applications (1)

Application Number Title Priority Date Filing Date
US380120A Expired - Lifetime US3884419A (en) 1972-07-19 1973-07-17 Blow guns

Country Status (6)

Country Link
US (1) US3884419A (enrdf_load_stackoverflow)
JP (1) JPS4944311A (enrdf_load_stackoverflow)
CH (1) CH564979A5 (enrdf_load_stackoverflow)
DE (1) DE2336351A1 (enrdf_load_stackoverflow)
FR (1) FR2193458A5 (enrdf_load_stackoverflow)
GB (1) GB1434538A (enrdf_load_stackoverflow)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD248041S (en) * 1975-12-15 1978-05-30 Sigurd Persson Air gun
DE2818937A1 (de) * 1978-04-28 1979-11-29 Wagner J Ag Ventileinrichtung fuer farbspritzpistolen
USD261547S (en) 1979-05-29 1981-10-27 Parke W Rod Air regulating nozzle
USD277403S (en) 1981-09-12 1985-01-29 Lucas Industries Limited Air nozzle
USD281349S (en) 1982-09-24 1985-11-12 Milton Industries Inc. Air nozzle
USD283535S (en) 1983-02-25 1986-04-22 S.A. Des Etablissements Staubli Air blower
US4867380A (en) * 1987-08-03 1989-09-19 Mar-Research Gesellschaft Fuer Forschung Und Entwicklung Mbh Pistol grip type compressed air blower
US4927115A (en) * 1989-05-26 1990-05-22 Masco Corporation Of Indiana Valve for a hand held spray nozzle
US5464155A (en) * 1994-01-13 1995-11-07 Schutter; Raymond A. Safety air gun
US5845851A (en) * 1996-04-03 1998-12-08 Netafim Irrigation Equipment And Drip Systems Kibbutz Hatzerim (1973) Irrigation hose nozzle
US20020000480A1 (en) * 2000-05-23 2002-01-03 Kimothy Levia Pivoting blow-gun
US6561115B2 (en) * 2001-04-02 2003-05-13 The United States Of America As Represented By The Secretary Of The Navy Anchor insertion device
US20060231646A1 (en) * 2005-04-18 2006-10-19 Geary Charles T Jr Straight flow nozzle
USD673648S1 (en) * 2010-11-12 2013-01-01 Lucien Masson Compressed air-pistol
CN115863515A (zh) * 2021-09-26 2023-03-28 合肥欣奕华智能机器股份有限公司 一种转移装置、转移设备及转移方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19543339A1 (de) * 1995-11-21 1996-09-05 Kurt Sebald Steckpistole mit einer Kupplung zur Werkzeugaufnahme am Ende
CN104324853B (zh) * 2014-09-25 2017-03-15 北京北机机电工业有限责任公司 一种带储腔的喷射装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2604361A (en) * 1946-04-13 1952-07-22 Harry A Yates Air gun
US2844408A (en) * 1956-02-25 1958-07-22 Waldemar Foerstner Nozzles
US3394890A (en) * 1965-11-27 1968-07-30 Woma Appbau Wolfgang Maasberg High-pressure spray gun
US3612406A (en) * 1969-11-03 1971-10-12 Murphy Ind Inc G W Safety blowgun

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2604361A (en) * 1946-04-13 1952-07-22 Harry A Yates Air gun
US2844408A (en) * 1956-02-25 1958-07-22 Waldemar Foerstner Nozzles
US3394890A (en) * 1965-11-27 1968-07-30 Woma Appbau Wolfgang Maasberg High-pressure spray gun
US3612406A (en) * 1969-11-03 1971-10-12 Murphy Ind Inc G W Safety blowgun

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD248041S (en) * 1975-12-15 1978-05-30 Sigurd Persson Air gun
DE2818937A1 (de) * 1978-04-28 1979-11-29 Wagner J Ag Ventileinrichtung fuer farbspritzpistolen
USD261547S (en) 1979-05-29 1981-10-27 Parke W Rod Air regulating nozzle
USD277403S (en) 1981-09-12 1985-01-29 Lucas Industries Limited Air nozzle
USD281349S (en) 1982-09-24 1985-11-12 Milton Industries Inc. Air nozzle
USD283535S (en) 1983-02-25 1986-04-22 S.A. Des Etablissements Staubli Air blower
US4867380A (en) * 1987-08-03 1989-09-19 Mar-Research Gesellschaft Fuer Forschung Und Entwicklung Mbh Pistol grip type compressed air blower
US4927115A (en) * 1989-05-26 1990-05-22 Masco Corporation Of Indiana Valve for a hand held spray nozzle
US5464155A (en) * 1994-01-13 1995-11-07 Schutter; Raymond A. Safety air gun
US5845851A (en) * 1996-04-03 1998-12-08 Netafim Irrigation Equipment And Drip Systems Kibbutz Hatzerim (1973) Irrigation hose nozzle
US20020000480A1 (en) * 2000-05-23 2002-01-03 Kimothy Levia Pivoting blow-gun
US6752335B2 (en) * 2000-05-23 2004-06-22 Summit Tool Company Pivoting blow-gun
US6561115B2 (en) * 2001-04-02 2003-05-13 The United States Of America As Represented By The Secretary Of The Navy Anchor insertion device
US20060231646A1 (en) * 2005-04-18 2006-10-19 Geary Charles T Jr Straight flow nozzle
USD673648S1 (en) * 2010-11-12 2013-01-01 Lucien Masson Compressed air-pistol
CN115863515A (zh) * 2021-09-26 2023-03-28 合肥欣奕华智能机器股份有限公司 一种转移装置、转移设备及转移方法

Also Published As

Publication number Publication date
FR2193458A5 (enrdf_load_stackoverflow) 1974-02-15
GB1434538A (en) 1976-05-05
JPS4944311A (enrdf_load_stackoverflow) 1974-04-26
CH564979A5 (enrdf_load_stackoverflow) 1975-08-15
DE2336351A1 (de) 1974-02-07

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