EP0885661A2 - Spray gun with quick-fitting connector - Google Patents

Spray gun with quick-fitting connector Download PDF

Info

Publication number
EP0885661A2
EP0885661A2 EP97202634A EP97202634A EP0885661A2 EP 0885661 A2 EP0885661 A2 EP 0885661A2 EP 97202634 A EP97202634 A EP 97202634A EP 97202634 A EP97202634 A EP 97202634A EP 0885661 A2 EP0885661 A2 EP 0885661A2
Authority
EP
European Patent Office
Prior art keywords
hose
gun
spray gun
delivery valve
pressurized fluid
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
EP97202634A
Other languages
German (de)
French (fr)
Other versions
EP0885661A3 (en
Inventor
Giuseppe Arsi
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.)
Interpump Group SpA
Original Assignee
Interpump Group SpA
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 Interpump Group SpA filed Critical Interpump Group SpA
Publication of EP0885661A2 publication Critical patent/EP0885661A2/en
Publication of EP0885661A3 publication Critical patent/EP0885661A3/en
Ceased legal-status Critical Current

Links

Images

Classifications

    • 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
    • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B05B1/3033—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head
    • B05B1/304—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve
    • B05B1/3046—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve element and its actuating means, generally in the proximity of the outlet orifice
    • B05B1/3066—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve element and its actuating means, generally in the proximity of the outlet orifice the valve element being at least partially hollow and liquid passing through it when the valve is opened
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/002—Manually-actuated controlling means, e.g. push buttons, levers or triggers
    • B05B12/0022—Manually-actuated controlling means, e.g. push buttons, levers or triggers associated with means for restricting their movement
    • B05B12/0024—Manually-actuated controlling means, e.g. push buttons, levers or triggers associated with means for restricting their movement to a single position
    • B05B12/0026—Manually-actuated controlling means, e.g. push buttons, levers or triggers associated with means for restricting their movement to a single position to inhibit delivery
    • 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
    • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B05B1/3033—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head
    • B05B1/304—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve
    • B05B1/3046—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve element and its actuating means, generally in the proximity of the outlet orifice
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/01—Spray pistols, discharge devices

Definitions

  • This invention relates to spray guns for jet washers.
  • Guns of this type are used for delivering water under pressure and are connected to the jet washer by a feed hose.
  • This type of gun generally consists of two plastic half-casings provided with suitable seats accommodating a valve body provided with a valve seat against which the valving element acts, this being controlled by the operator by means of a suitable lever, to deliver the pressurized fluid.
  • valve feed and delivery conduits are connected respectively to a feed hose, and to a delivery nozzle or to a delivery lance.
  • connection between the valve body and the hose is made using a threaded coupling, one end of which is screwed into the threaded feed conduit of the valve body, and on the other end of which there is screwed the rigid metal connector with which the hose is provided.
  • This type of connection does not enable the hose to rotate about its longitudinal axis, and this can give rise to problems in that during the use of the jet washer the hose can twist about itself to undergo damage or at least to exert a twisting moment on the gun, which has to be counteracted by the operator.
  • spray guns are known in which the connection between the valve body and the hose is made by a sealed double coupling which is inserted into the feed conduit of the spray gun valve body and into which there is inserted the metal connector of the high pressure hose.
  • the end part of the hose metal connector is sometimes widened to rest on a thrust bearing supported by an appropriate seat in the casing.
  • the object of the invention is to overcome the stated drawbacks by providing a spray gun which enables the hose to be fitted into the spray gun without having to open its casing, within the context of a simple construction which is practical and reliable in terms of the seal between the parts concerned.
  • Figure 1 shows one of the two half-casings 1, each provided with suitable seats for receiving the pressurized liquid ducting means, which become locked in position when the two half-casings are closed and fixed together by screws.
  • connection element 2 for a possible external delivery lance and fitted into a double socket coupling 3, the other end of which represents the valve seat for the valving element 4.
  • the valving element is controlled for pressurized fluid delivery by the lever 5.
  • the pressurized liquid is fed into the valving element 4 via the profiled plastic tube 6 which has two socket-shaped ends, into one of which the valving element 4 is inserted, while into the other there is inserted one end of the double seal coupling 7.
  • the metal connector 8 of the high pressure hose 9 is of cylindrical section and has an intermediate slot for receiving the stop 10.
  • the stop 10 is fork-shaped (see Figure 2) and forms a constraint for the metal connector 8 of the hose 9 such as to prevent its
  • the purpose of the stop 10 is therefore to prevent the metal connector 8 withdrawing from the double seal coupling 7 under the high pressure in play during the operation of the jet washer, but without preventing rotation of the hose 9 at high pressure, so avoiding undesirable twisting of the hose under high pressure.
  • Figure 3 also shows a known tubular protection element 12 of rigid plastic construction, the purpose of which is to prevent excessive bending of the hose 9.
  • the same figure also shows a safety hook 13, the purpose of which is to prevent undesired delivery of pressurized fluid by locking the movement of the lever 5.

Abstract

A spray gun for jet washers which comprises a profiled plastic outer casing (1) within which there are housed, in appropriate seats, a pressurized fluid delivery valve controlled by a lever (5) located on the gun handgrip, means for connecting the delivery valve to the delivery nozzle and means for connecting the delivery valve to the pressurized fluid feed hose, said means being of the male-female insertion type, in which in the connection means rigid with the hose there is provided a seat arranged to receive an externally removable element (10) for retaining said hose in its coupled position, said element being received in an appropriate aperture provided in the gun casing.

Description

This invention relates to spray guns for jet washers.
Guns of this type are used for delivering water under pressure and are connected to the jet washer by a feed hose. This type of gun generally consists of two plastic half-casings provided with suitable seats accommodating a valve body provided with a valve seat against which the valving element acts, this being controlled by the operator by means of a suitable lever, to deliver the pressurized fluid.
The valve feed and delivery conduits are connected respectively to a feed hose, and to a delivery nozzle or to a delivery lance.
The connection between the valve body and the hose is made using a threaded coupling, one end of which is screwed into the threaded feed conduit of the valve body, and on the other end of which there is screwed the rigid metal connector with which the hose is provided.
This type of connection does not enable the hose to rotate about its longitudinal axis, and this can give rise to problems in that during the use of the jet washer the hose can twist about itself to undergo damage or at least to exert a twisting moment on the gun, which has to be counteracted by the operator.
To overcome these problems, spray guns are known in which the connection between the valve body and the hose is made by a sealed double coupling which is inserted into the feed conduit of the spray gun valve body and into which there is inserted the metal connector of the high pressure hose. To prevent the hose withdrawing from the coupling during operation because of the high pressure to which it is subjected, and to enable it to rotate about its axis, the end part of the hose metal connector is sometimes widened to rest on a thrust bearing supported by an appropriate seat in the casing.
This type of connection is of complex construction, and does not eliminate the drawback that to replace the hose the outer casing of the gun has to be opened and some of the elements contained in it have to be removed.
The object of the invention is to overcome the stated drawbacks by providing a spray gun which enables the hose to be fitted into the spray gun without having to open its casing, within the context of a simple construction which is practical and reliable in terms of the seal between the parts concerned.
Said object is attained by the invention by virtue of the characteristics defined in the claims.
The operational and constructional characteristics of the invention will be more apparent from the following description of a preferred embodiment thereof given by way of non-limiting example and illustrated on the accompanying drawings.
  • Figure 1 is a side section through the invention.
  • Figure 2 is a section on the line II-II of Figure 1.
  • Figure 3 is an overall view of the invention.
    • Figure 1 shows one of the two half-casings 1, each provided with suitable seats for receiving the pressurized liquid ducting means, which become locked in position when the two half-casings are closed and fixed together by screws.
    In particular, the figure shows a connection element 2 for a possible external delivery lance and fitted into a double socket coupling 3, the other end of which represents the valve seat for the valving element 4.
    The valving element is controlled for pressurized fluid delivery by the lever 5.
    The pressurized liquid is fed into the valving element 4 via the profiled plastic tube 6 which has two socket-shaped ends, into one of which the valving element 4 is inserted, while into the other there is inserted one end of the double seal coupling 7.
    Into the other end of the double seal coupling 7 there is inserted the metal connector 8 of the high pressure hose 9. The metal connector 8 is of cylindrical section and has an intermediate slot for receiving the stop 10.
    The stop 10 is fork-shaped (see Figure 2) and forms a constraint for the metal connector 8 of the hose 9 such as to prevent its
    longitudinal movement but without hindering its rotation.
    The purpose of the stop 10 is therefore to prevent the metal connector 8 withdrawing from the double seal coupling 7 under the high pressure in play during the operation of the jet washer, but without preventing rotation of the hose 9 at high pressure, so avoiding undesirable twisting of the hose under high pressure.
    As can be seen from Figure 3, to insert the hose 9 into the spray gun it is necessary merely to remove the stop 10 from the slot 11 provided in one of the two half-casings 1 of the spray gun, and insert the metal connector 8 of the hose 9 into the double seal coupling contained within the gun.
    When the metal connector 8 has been inserted, the operation is concluded by re-inserting the stop 10 into the slot 11, and which when inserted is coplanar with the outer surface of the casing for safety reasons.
    Figure 3 also shows a known tubular protection element 12 of rigid plastic construction, the purpose of which is to prevent excessive bending of the hose 9.
    The same figure also shows a safety hook 13, the purpose of which is to prevent undesired delivery of pressurized fluid by locking the movement of the lever 5.
    As is apparent from the description, the entire operation of inserting the hose 9 into the spray gun is carried out without having to open the gun half-casings, and is hence of simple and practical implementation.

    Claims (2)

    1. A spray gun for jet washers, comprising a profiled plastic outer casing within which there are housed, in appropriate seats, a pressurized fluid delivery valve controlled by a lever located on the gun handgrip, means for connecting the delivery valve to the delivery nozzle and means for connecting the delivery valve to the pressurized fluid feed hose, said means being of the male-female insertion type, characterised in that in the connection means rigid with the hose there is provided a seat arranged to receive an externally removable element for retaining said hose in its coupled position, said element being received in an appropriate aperture provided in the gun casing.
    2. A spray gun as claimed in claim 1, characterised in that the removable retention element is a fork-shaped insert, the arms of which engage in the appropriate seat provided in the connection means present at the end of the hose.
    EP97202634A 1997-05-22 1997-08-28 Spray gun with quick-fitting connector Ceased EP0885661A3 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    IT1997RE000027U IT238406Y1 (en) 1997-05-22 1997-05-22 SPRAY GUN WITH QUICK COUPLING
    ITRE970027U 1997-05-22

    Publications (2)

    Publication Number Publication Date
    EP0885661A2 true EP0885661A2 (en) 1998-12-23
    EP0885661A3 EP0885661A3 (en) 2000-05-10

    Family

    ID=11399032

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP97202634A Ceased EP0885661A3 (en) 1997-05-22 1997-08-28 Spray gun with quick-fitting connector

    Country Status (3)

    Country Link
    EP (1) EP0885661A3 (en)
    DE (1) DE29716004U1 (en)
    IT (1) IT238406Y1 (en)

    Cited By (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    EP1084762A2 (en) 1999-09-17 2001-03-21 Alfred Kärcher GmbH & Co. Hand spray gun for a high pressure cleaning apparatus
    WO2014201781A1 (en) * 2013-06-18 2014-12-24 Yang Mingjun Air blow gun with rapid replacing structure

    Families Citing this family (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE202005011557U1 (en) * 2005-07-22 2005-09-29 Hammelmann Maschinenfabrik Gmbh High pressure spray gun includes pressure lever pivotally connected to grip part and pressing against free end of grip lever in functioning position for easier use with less effort
    DE102006013005A1 (en) * 2006-03-22 2007-09-27 Alfred Kärcher Gmbh & Co. Kg High-pressure spray gun

    Family Cites Families (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US3973791A (en) * 1974-10-09 1976-08-10 Hps Company, Inc. Safety coupling device
    DE4035008C2 (en) * 1990-02-28 1993-10-28 Suttner Gmbh & Co Kg Hose coupling for high pressure hoses
    DE19617417A1 (en) * 1996-05-01 1997-11-06 Kaercher Gmbh & Co Alfred Manual spray gun for a high pressure cleaning device

    Non-Patent Citations (1)

    * Cited by examiner, † Cited by third party
    Title
    None

    Cited By (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    EP1084762A2 (en) 1999-09-17 2001-03-21 Alfred Kärcher GmbH & Co. Hand spray gun for a high pressure cleaning apparatus
    EP1084762A3 (en) * 1999-09-17 2002-05-02 Alfred Kärcher GmbH & Co. Hand spray gun for a high pressure cleaning apparatus
    WO2014201781A1 (en) * 2013-06-18 2014-12-24 Yang Mingjun Air blow gun with rapid replacing structure

    Also Published As

    Publication number Publication date
    DE29716004U1 (en) 1997-10-23
    ITRE970027U1 (en) 1998-11-22
    IT238406Y1 (en) 2000-11-13
    EP0885661A3 (en) 2000-05-10

    Similar Documents

    Publication Publication Date Title
    US20230380707A1 (en) Swivel hose coupling with outer grip
    US5375887A (en) Plumbing hookup kit
    US4210168A (en) Pressure-responsive valve unit for a fluid container
    US4709859A (en) High pressure washing apparatus
    US6447027B1 (en) Quick connect hydrant nozzle for connecting a fire hose to a fire hydrant
    US4817997A (en) Hose coupling
    US8720487B2 (en) Grease delivery receiver and nozzle couplable without fluid pressure bleed-down and having pressurization lockout and flush face coupling
    US3589388A (en) Injector nozzle retriever and insertion apparatus
    JPH024839B2 (en)
    EP0885661A2 (en) Spray gun with quick-fitting connector
    US5931508A (en) Fluid coupling
    US4272108A (en) Swivel for high-pressure conduit-cleaning assembly
    US5284318A (en) Fluid connection and control device for fluid machines
    GB2028974A (en) Pressure-responsive valve unit for a fluid container
    US7614663B2 (en) Swivel assemblies for conduits carrying pressurized fluids to or from air conditioning or refrigeration systems
    US5623959A (en) Hydraulic pressure relief tool
    US3479058A (en) Hose coupling assembly
    US2176295A (en) Lubricating device
    US6604548B2 (en) Safety valve
    EP0670448A1 (en) Rotary fluid coupling
    US4656685A (en) Duct cleaner
    KR100353243B1 (en) Retainer for connection portion of hydrodynamic machine
    US5261607A (en) Water sprayer assembly and fluid coupling device particularly useful therein
    GB2342417A (en) A connector for use in supplying treatment chemicals to central heating systems
    JPS6329976Y2 (en)

    Legal Events

    Date Code Title Description
    PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

    Free format text: ORIGINAL CODE: 0009012

    AK Designated contracting states

    Kind code of ref document: A2

    Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

    AX Request for extension of the european patent

    Free format text: AL;LT;LV;RO;SI

    PUAL Search report despatched

    Free format text: ORIGINAL CODE: 0009013

    AK Designated contracting states

    Kind code of ref document: A3

    Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

    AX Request for extension of the european patent

    Free format text: AL;LT;LV;RO;SI

    RIC1 Information provided on ipc code assigned before grant

    Free format text: 7B 05B 15/06 A, 7B 05B 1/30 B, 7B 05B 9/01 B, 7F 16L 37/14 B

    17P Request for examination filed

    Effective date: 20001004

    AKX Designation fees paid

    Free format text: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

    AXX Extension fees paid

    Free format text: AL PAYMENT 20001004;LT PAYMENT 20001004;LV PAYMENT 20001004;RO PAYMENT 20001004;SI PAYMENT 20001004

    17Q First examination report despatched

    Effective date: 20010801

    STAA Information on the status of an ep patent application or granted ep patent

    Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

    18R Application refused

    Effective date: 20021229