[go: up one dir, main page]

WO1991003320A1 - Pistolet pulverisateur - Google Patents

Pistolet pulverisateur Download PDF

Info

Publication number
WO1991003320A1
WO1991003320A1 PCT/GB1990/001368 GB9001368W WO9103320A1 WO 1991003320 A1 WO1991003320 A1 WO 1991003320A1 GB 9001368 W GB9001368 W GB 9001368W WO 9103320 A1 WO9103320 A1 WO 9103320A1
Authority
WO
WIPO (PCT)
Prior art keywords
spraygun
air
restricting means
pressure
restricting
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.)
Ceased
Application number
PCT/GB1990/001368
Other languages
English (en)
Inventor
Rowland Charles Smith
Anthony John Bate
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.)
DeVilbiss Co Ltd
DeVilbiss Co
Original Assignee
DeVilbiss Co Ltd
DeVilbiss Co
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 DeVilbiss Co Ltd, DeVilbiss Co filed Critical DeVilbiss Co Ltd
Publication of WO1991003320A1 publication Critical patent/WO1991003320A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
    • B05B7/0807—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets
    • B05B7/0815—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets with at least one gas jet intersecting a jet constituted by a liquid or a mixture containing a liquid for controlling the shape of the latter
    • B05B7/0838—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets with at least one gas jet intersecting a jet constituted by a liquid or a mixture containing a liquid for controlling the shape of the latter comprising a single means controlling simultaneously the flow rates of shaping and spraying gas jets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/12—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages
    • B05B7/1209—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means for each liquid or other fluent material being manual and interdependent

Definitions

  • This invention relates to a spraygun, and more particularly to a spraygun that is operable by high volume low pressure air.
  • An aim of the present invention is to provide an improved spraygun which meets the above requirements.
  • the present invention provides a spraygun operable by low pressure high volume air comprising a body and a nozzle having a fluid orifice for discharging a fluid jet and an air cap attached to the front of the body, the air cap defining an annular orifice about the fluid nozzle for discharging atomisation air, wherein the air inlet for supplying air to the spraygun has a first restricting means to reduce the pressure of air to the spraygun and a second restricting means to control the pressure of air to the air cap.
  • the first restricting means is a screw-threaded replaceable unit, dimensioned to provide a predetermined restriction of the air inlet pressure, conveniently the unit can be provided with an indication of the predetermined air inlet pressure.
  • the second restricting means is a flow restricting valve being axially adjustable by a knurled headed screw-threaded member.
  • Fig. 2 is a similar cross-section to Fig.l of a modified construction of a spraygun according to the invention.
  • Fig.l shows a first embodiment of a hand-held spraygun generally indicated at 1.
  • the spraygun is operable by high pressure air fed from an industrial compressor (not shown) at a typical pressure of between 60 to 90 psi, and at a flow rate of about 15 cubic feet per minute. Air enters the gun 1 at the lower end of a handle 2 via a first air restricting means 3 screwed into the handle which may be made integral with the gun body 4 or of plastics or other non-metallic material.
  • the restricting means 3 is flanged at 5 intermediate its ends to support the handle 2.
  • the air pressure to the spraygun is reduced to an intermediate pressure e.g. 30 psi, depending upon the flow and pressure restricting dimensions of the air restricting means 3.
  • the air flows via the restricting means into a passage 6 in the handle and into an air space 7 controlled by the operation of the spraygun trigger 8.
  • the air then flows via passage 9 surrounding the trigger mechanism to a large bore air passage 10 in which is located a second air restricting means 11 to control the air supply at a reduced pressure to distribution chambers 12 and 12A at the front of the gun body 4.
  • the second air restricting means comprises a flow restricting valve 16 which controls the pressure in the chamber 10.
  • the valve is sealed in the body by 0-ring seals 17 in sub-body 16A.
  • the air valve 16 is axially adjustable by a screw threaded member which has a knurled head 19 which can be turned to adjust the valve 16.
  • a needle 13 is secured to the front of valve 16 by a pin 18 so that axial adjustment of the valve 16 engages the needle point 14 with a seat in the body to adjust the amount of air passing to chamber 12A.
  • This air is termed spreader air and flows from the chamber 12A through feeder holes to horn holes 22.
  • the regulated air from valve 16 also passes through passage 12B into chamber 12 and out through annulus 23A and cleaner holes 23.
  • the control of air to the horn holes 22 via the control needle 13 can result in an increase of pressure in chambers 12 and 20.
  • the air pressure existing at the spraygun aircap 24 is controlled to a predetermined level e.g. 10 psi.
  • the fluid medium enters the gun body 4 via the inlet 25 which is screwed into the head 26 of the gun body and makes a cone to cone seal with a sleeve 27.
  • the supply of fluid medium to the spray nozzle 21 is controlled by a needle 28 which enters the gun body at the upper end of the handle and is mounted in a body bush 29, it also carries a collar 30 which provides an abutment against which the trigger 8, pivoted to the bod at 31 acts.
  • a knurled fluid adjustment knob 3.2 which threadedl engages in body bush 29 which also serves to provide a oveable abutment for limiting the rearward movement of the needle 28 by the trigger 8 in the conventional manner.
  • the air cap 24 fits over the spray-nozzle 21 and is secured to the spraygun by a retaining ring 35.
  • the first restricting means takes th form of a tube 36 mounted in the passage 6 and sealed i position by a threaded plug 37.
  • the tube 36 is provide with a series of holes 38 to allow the initial air pressure to be reduced to an intermediate air pressure e.g. 30 psi by the restricting orifice 36A.
  • This tube and its restricting orifice 36A can be replaced by alternative restricting tubes allowing for different levels of intermediate pressure.
  • the restricting means 3 is replaced by a connector 35 without a restricting orifice for connecting the airline to the spraygun.
  • the spraygun can be appropriately marked on its outer surface with the input and operational pressure of the spraygun, viz "90 psi input - 10 psi at air cap", to satisfy the standards laid down for a particular country or the state laws of a state in the USA. In operation the input air pressure from the compressor may vary.
  • the improved spraygun of the present invention provides two levels of restriction of the input air pressure, firstly to reduce the flow of air entering the spraygun to an intermediate pressure level and secondly to provide a simultaneous reduction in air pressure to a controlled level through all normal adjusting ranges using a conventional spraygun.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Nozzles (AREA)

Abstract

On décrit un pistolet pulvérisateur (1) fonctionnant grâce à de l'air à basse pression et à volume élevé et comprenant un corps (4) et une buse (21) qui possède un orifice à fluides destiné à décharger un jet fluide, ainsi qu'un chapeau à air (24) fixé à l'avant du corps par un anneau de blocage (35). Le chapeau à air (24) définit un orifice annulaire disposé autour de la buse (21) à fluides et destiné à décharger de l'air atomisé. L'entrée d'air alimentant en air le pistolet pulvérisateur (1) possède des premiers moyens restreignants (3) servant à réduire la pression de l'air au pistolet et des seconds moyens à soupape restreignante (11) servant à régler l'écoulement d'air vers le chapeau à air (24).
PCT/GB1990/001368 1989-09-05 1990-09-04 Pistolet pulverisateur Ceased WO1991003320A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8920007.5 1989-09-05
GB898920007A GB8920007D0 (en) 1989-09-05 1989-09-05 Spraygun

Publications (1)

Publication Number Publication Date
WO1991003320A1 true WO1991003320A1 (fr) 1991-03-21

Family

ID=10662531

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1990/001368 Ceased WO1991003320A1 (fr) 1989-09-05 1990-09-04 Pistolet pulverisateur

Country Status (3)

Country Link
AU (1) AU6341290A (fr)
GB (1) GB8920007D0 (fr)
WO (1) WO1991003320A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993013869A1 (fr) * 1992-01-13 1993-07-22 Itw Limited Clapet a air pour pistolet de pulverisation
WO1993013870A1 (fr) * 1992-01-13 1993-07-22 Itw Limited Systeme de detection de pression de retour d'air
US5340592A (en) * 1988-05-18 1994-08-23 Cobe Laboratories, Inc. Lyophilization of erythrocytes
WO1995022409A1 (fr) * 1994-02-18 1995-08-24 Itw Limited Pistolet pulverisateur ameliore
US5648206A (en) * 1988-08-26 1997-07-15 Cobe Laboratories, Inc. Lyophilization of cells
ES2151778A1 (es) * 1997-04-04 2001-01-01 Sagola Sa Pistola aerografica perfeccionada de baja presion.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1055459B (de) * 1957-11-07 1959-04-16 Karl Schmidt Metallschmelzwerk Mittels Druckluft betriebene Spruehpistole
GB2138706A (en) * 1983-04-08 1984-10-31 Commw Ind Gases Spray gun having an air control valve
EP0140547A1 (fr) * 1983-09-09 1985-05-08 THE DeVILBISS COMPANY LIMITED Petits pistolets de pulverisation
GB2180778A (en) * 1985-09-24 1987-04-08 Azzimonti Giovanni Mec Srl Air-delivery adjusting device in a spray-gun
US4817872A (en) * 1987-05-22 1989-04-04 Mattson Roy D Adjustable fluid spray gun

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1055459B (de) * 1957-11-07 1959-04-16 Karl Schmidt Metallschmelzwerk Mittels Druckluft betriebene Spruehpistole
GB2138706A (en) * 1983-04-08 1984-10-31 Commw Ind Gases Spray gun having an air control valve
EP0140547A1 (fr) * 1983-09-09 1985-05-08 THE DeVILBISS COMPANY LIMITED Petits pistolets de pulverisation
GB2180778A (en) * 1985-09-24 1987-04-08 Azzimonti Giovanni Mec Srl Air-delivery adjusting device in a spray-gun
US4817872A (en) * 1987-05-22 1989-04-04 Mattson Roy D Adjustable fluid spray gun

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Derwent's abstract No. 427 440 B/15, SU 608 557, publ. week 7915 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5340592A (en) * 1988-05-18 1994-08-23 Cobe Laboratories, Inc. Lyophilization of erythrocytes
US5648206A (en) * 1988-08-26 1997-07-15 Cobe Laboratories, Inc. Lyophilization of cells
WO1993013869A1 (fr) * 1992-01-13 1993-07-22 Itw Limited Clapet a air pour pistolet de pulverisation
WO1993013870A1 (fr) * 1992-01-13 1993-07-22 Itw Limited Systeme de detection de pression de retour d'air
US5441077A (en) * 1992-01-13 1995-08-15 Itw Limited Feedback air pressure sensing system
US5460203A (en) * 1992-01-13 1995-10-24 Itw Limited Air valve
WO1995022409A1 (fr) * 1994-02-18 1995-08-24 Itw Limited Pistolet pulverisateur ameliore
AU675381B2 (en) * 1994-02-18 1997-01-30 Itw Limited An improved spray gun
ES2151778A1 (es) * 1997-04-04 2001-01-01 Sagola Sa Pistola aerografica perfeccionada de baja presion.

Also Published As

Publication number Publication date
AU6341290A (en) 1991-04-08
GB8920007D0 (en) 1989-10-18

Similar Documents

Publication Publication Date Title
US5284299A (en) Pressure compensated HVLP spray gun
US6089471A (en) Fluid spray gun
US7234649B2 (en) Spray gun
US5178330A (en) Electrostatic high voltage, low pressure paint spray gun
US5090623A (en) Paint spray gun
EP0509367B1 (fr) Bague répartitrice pour pistolet de pulvérisation à grand volume et basse pression d'air
US4537357A (en) Spray guns
US5676310A (en) Method and system for air spray coating and manually-operated atomizing device for use therein
US5102051A (en) Spray gun
USRE36378E (en) High volume low pressure air spray gun
CA2004257C (fr) Pulverisateur avec mecanisme a turbine reduisant la turbulence de l'air
EP0140547A1 (fr) Petits pistolets de pulverisation
AU2002326030A1 (en) Spray gun
AU1566402A (en) A spray gun
US4544100A (en) Liquid spray gun having quick change pattern control
US5135172A (en) High volume low pressure spray gun
US4899938A (en) Liquid spray nozzle adapter
US4650119A (en) Air spray gun
US3910496A (en) Atomizer
WO1991003320A1 (fr) Pistolet pulverisateur
EP0381072B1 (fr) Pistolet de pulvérisation à fort débit d'air basse pression
HK1099531A (en) Spray gun with adjustable spray pattern

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AU BR CA JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB IT LU NL SE

NENP Non-entry into the national phase

Ref country code: CA