US3913844A - Safety spray gun trigger - Google Patents

Safety spray gun trigger Download PDF

Info

Publication number
US3913844A
US3913844A US450927A US45092774A US3913844A US 3913844 A US3913844 A US 3913844A US 450927 A US450927 A US 450927A US 45092774 A US45092774 A US 45092774A US 3913844 A US3913844 A US 3913844A
Authority
US
United States
Prior art keywords
spray gun
trigger
spray
retainer
pivot pin
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
US450927A
Other languages
English (en)
Inventor
John E Petrovic
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.)
Graco Inc
Original Assignee
Graco Inc
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 Graco Inc filed Critical Graco Inc
Priority to US450927A priority Critical patent/US3913844A/en
Publication of USB450927I5 publication Critical patent/USB450927I5/en
Application granted granted Critical
Publication of US3913844A publication Critical patent/US3913844A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • 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
    • 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

  • ABSTRACT Apparatus disclosed for disabling a paint spray gun [52] US. Cl. 239/526; 239/600; 251/89; triggering mechanism when the spray tip is removed, 251/1 1 1 as for cleaning or replacement.
  • the apparatus disables [51] Int. Cl. B05B 11/00 the spray gun trigger by shifting the trigger pivot point [58] Field of Search 239/526-528, to an inactive position.
  • SAFETY SPRAY GUN TRIGGER This invention relates to a spray gun apparatus, and more particularly to a safety trigger for insuring that high pressure fluid cannot be sprayed when the proper spray gun tip is not attached.
  • the two basic techniques of paint spraying are air spraying and airless spraying, both of which are accomplished using spray guns usually having very small spray orifices through which the paint mixture is ejected.
  • the paint is intermixed with pressurized air within the spray gun and the composite mixture is sprayed through an orifice under pressure.
  • the air pressure required is typically on the order of 10-50 pounds per square inch.
  • airless spraying the paint itself is maintained under high hydraulic pressures, typically SOD-3,000 pounds per square inch, and this highly pressurized paint is forced through the spray orifice to create the necessary atomization. Because of the relatively small size of the orifice opening in both cases, it is frequently necessary to remove the orifice for cleaning and/or unplugging.
  • the present invention provides yet another improvement in trigger safety devices, and provides an improvement which may be used in conjunction with the feature described in the above-named patent.
  • This invention disengages the trigger actuating mechanism whenever the spray tip, including the spray orifice, is removed from the gun. Because the trigger disabling mechanism comes into play whenever the spray tip is removed, it requires no other operator manipulation. As such, it provides a completely safe trigger disabling mechanism which does not depend upon operator actions such as are required with other trigger safety devices.
  • the invention comprises a slidable rod positioned within the body of the spray gun, and having its first end abutting the threaded nut which holds the spray tip on the spray gun.
  • the second end of the slidable rod abuts against the gun trigger pivot pin and serves to hold the pivot pin in an operable position when the spray tip nut is tightened.
  • the spray tip nut is loosened, such as for the purpose of removing the spray tip from the gun, the rod slides forward and relieves the force on the trigger pivot pin, allowing the pin to move freely within a constrained area.
  • the pin is freely movable it can provide no pivot point from where a force can be leveraged to cause the trigger to activate the spray gun valving mechanism.
  • the trigger effectively hangs loosely in its mounting and becomes totally disengaged from triggering operation.
  • FIG. 1 illustrates a spray gun having the inventive improvement incorporated therein
  • FIG. 2 illustrates the spray gun in a disabled configuration.
  • FIG. 1 illustrates a spray gun having the inventive improvement incorporated therein. Portions of the spray gun are shown in crosssection to facilitate the understanding of the working components associated with this invention.
  • Trigger 10 actuates the spraying mechanism of the spray gun by pulling it backward toward handle 12.
  • Trigger l pivots about a pin 15 which protrudes through the body of the spray gun and through holes near the upper end of trigger which are sized to accept pin 15.
  • Pin has appropriate flanges or other locking means at each of its ends to prevent it from falling out of the gun.
  • the pin 15 passage 18 through the gun body is constructed as an elongated slot for purposes hereinafter to be described in conjunction with the operation of the invention.
  • valve rod 17 is withdrawn when trigger 10 is squeezed, there being a suitable connection between trigger 10 and the valve rod 17 retracting mechanism. For purposes of explanation, this is illustrated as contact point 19, it being assumed that a suitable trigger edge bears against a shoulder on the valve rod retracting mechanism at contact point 19.
  • the precise trigger retracting mechanism is not critical to this invention, it being required only that a trigger-valve rod mechanism contact point be established for actuating the valve rod mechanism.
  • the paint spray is typically finely atomized and, in the case of an airless spray gun, is forced through the small spray tip 20 orifice under a high hydraulic pressure.
  • This high hydraulic pressure exists at all points rearward of spray tip 20 within the spray gun, and in particular exists within spray passage
  • a spray tip retainer nut is threaded on to the spray gun and tightly clamps spray tip 20 against the gun.
  • Retainer nut 25 also bears against the end of slidable rod 23 and holds rod 23 in the position shown.
  • the other end of rod 23 bears against pin 15 to force pin 15 against the rearward edge of slotted passage 18.
  • the pivot point of trigger 10 as determined by the position of pin 15 is located at the rearward portion of slotted passage 18.
  • trigger safety 27 is a safety latch for preventing trigger movement.
  • trigger safety 27 When trigger safety 27 is rotated 90 from the position shown it bears against the rear surface of trigger l and prevents it from being squeezed toward handle 12.
  • the effectiveness of trigger safety 27 depends upon the operator remembering to rotate it 90.
  • FIG. 2 illustrates the additional safety feature of the present invention.
  • rod 23 may be spring-loaded within the spray gun housing to force it away from contact with pin 15 under all circumstances except when tip retainer nut 25 is securely attached.
  • the end of rod 23 may be recessed within the spray gun housing to prevent the accumulation of paint thereon.
  • rod 23 may be provided with a suitable shoulder at any convenient point to hold it within the spray gun housing and to insure that it does not fall out when the spray gun is moved without the tip retainer nut 25 being properly positioned. All of these variations and others are contemplated within the spirit of this invention, the inventive embodiment being directed essentially to an apparatus for controlling the spray gun trigger pivot in a manner to allow disabling of the trigger actuating mechanism when the spray tip is removed.
  • a spray gun trigger disabling apparatus effective on removal of the spray gun spray tip retainer, comprismg means for pivoting said trigger about a pivot point for providing a spray gun trigger actuating leverage force;
  • a slidable rod connected between said means for moving the pivot point and the spray tip retainer, whereby the removal of the spray tip retainer causes the pivot point to move to the disabling position.
  • Apparatus as claimed in claim 1 wherein the means for pivoting said trigger further comprises a pin extending between said trigger and said spray gun.
  • a spray gun safety apparatus for disabling the spray gun trigger on removal of the spray tip retainer from the spray gun housing comprising:
  • a slidable rod extending between said slotted passage and said spray tip retainer to hold said pivot pin in an actuating position when said tip retainer is se cured.
  • Apparatus as claimed in claim 6, further comprising a passage in said gun housing of diameter slightly greater than said slidable rod, said passage extending between said slotted passage and a spray gun surface adjacent the edge of said secured tip retainer, wherein said slidable rod resides.
  • a spray gun trigger disabling apparatus effective on removal of the spray tip and retainer to prevent actuation of the spray gun fluid valve, comprising:
  • a movable member extending between said retainer and said pivot pin, whereby said member holds said pivot pin in a first position when said retainer retains said spray tip and releases said pivot pin to a second position when said retainer is removed.
  • said movable member further comprises a rod slidable within a passage in said spray gun.

Landscapes

  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
  • Nozzles (AREA)
US450927A 1974-03-13 1974-03-13 Safety spray gun trigger Expired - Lifetime US3913844A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US450927A US3913844A (en) 1974-03-13 1974-03-13 Safety spray gun trigger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US450927A US3913844A (en) 1974-03-13 1974-03-13 Safety spray gun trigger

Publications (2)

Publication Number Publication Date
USB450927I5 USB450927I5 (enrdf_load_html_response) 1975-01-28
US3913844A true US3913844A (en) 1975-10-21

Family

ID=23790091

Family Applications (1)

Application Number Title Priority Date Filing Date
US450927A Expired - Lifetime US3913844A (en) 1974-03-13 1974-03-13 Safety spray gun trigger

Country Status (1)

Country Link
US (1) US3913844A (enrdf_load_html_response)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4022381A (en) * 1975-11-24 1977-05-10 Karliner Rudolf R Airless spray apparatus
US4181261A (en) * 1978-03-17 1980-01-01 Nordson Corporation Safety guard for an airless spray nozzle
US4216911A (en) * 1978-02-04 1980-08-12 Woma Apparatebau Wolfgang Maasberg & Co. Gmbh High-pressure liquid-jet gun
US4637551A (en) * 1985-04-05 1987-01-20 Seeger Corporation Safety guard for airless spray apparatus
US5392992A (en) * 1992-07-21 1995-02-28 S.I.C.M.O. Societe Industrielle Low pressure paint spray gun with improved spray head
US5555585A (en) * 1990-08-10 1996-09-17 Compri Technic Pty., Ltd. Pneumatic gun and projectiles therefor
US5803313A (en) * 1996-05-21 1998-09-08 Illinois Tool Works Inc. Hand held fluid dispensing apparatus
EP0873202A4 (en) * 1994-12-16 1998-12-23 Pneumatic Syst Int Pty Ltd MULTIPURPOSE LOCKING PNEUMATIC GUN
US6412662B1 (en) * 2001-09-07 2002-07-02 Illinois Tool Works Inc. Hot melt adhesive hand applicator
USD573227S1 (en) * 2006-06-12 2008-07-15 Titan Tool, Inc. Texture spray gun
WO2010080365A1 (en) * 2008-12-18 2010-07-15 Graco Minnesota Inc. Tooless needle change spray gun
US20120280493A1 (en) * 2011-03-21 2012-11-08 Macro Technologies, Llc Rapid-connect coupler with vent-stop
US9732893B2 (en) 2010-08-10 2017-08-15 Engineered Controls International, Llc Rapid-connect coupler
US9897239B2 (en) 2015-04-27 2018-02-20 Engineered Controls International, Llc Rapid-connect coupler with vent stop
US10386017B2 (en) 2015-12-03 2019-08-20 Engineered Controls International, Llc Low emission nozzles and receptacles
US10518282B2 (en) 2017-04-10 2019-12-31 O2Cool, Llc Drink and misting bottle with trigger lock
US20200276601A1 (en) * 2019-03-01 2020-09-03 William Harrison System and method for efficient and ergonomic waterproofing of joints and fasteners
US10875042B1 (en) 2019-09-20 2020-12-29 O2Cool, Llc Bottle closure
US11392150B2 (en) * 2018-09-12 2022-07-19 Stopak India Pvt. Ltd. Inflator with automatic shut-off functionality
US12090506B2 (en) 2020-07-14 2024-09-17 Techtronic Cordless Gp Powered sprayer

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3944141A (en) * 1975-05-19 1976-03-16 Graco Inc. Spray gun shield and trigger safety apparatus
US4389017A (en) 1981-04-15 1983-06-21 Geberth John Daniel Jun Spray gun

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3410491A (en) * 1966-08-26 1968-11-12 Tri Matic Equipment Co Valve means
US3780953A (en) * 1972-01-21 1973-12-25 J Malec Airless spray gun

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3410491A (en) * 1966-08-26 1968-11-12 Tri Matic Equipment Co Valve means
US3780953A (en) * 1972-01-21 1973-12-25 J Malec Airless spray gun

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4022381A (en) * 1975-11-24 1977-05-10 Karliner Rudolf R Airless spray apparatus
US4216911A (en) * 1978-02-04 1980-08-12 Woma Apparatebau Wolfgang Maasberg & Co. Gmbh High-pressure liquid-jet gun
US4181261A (en) * 1978-03-17 1980-01-01 Nordson Corporation Safety guard for an airless spray nozzle
US4637551A (en) * 1985-04-05 1987-01-20 Seeger Corporation Safety guard for airless spray apparatus
US5555585A (en) * 1990-08-10 1996-09-17 Compri Technic Pty., Ltd. Pneumatic gun and projectiles therefor
US5392992A (en) * 1992-07-21 1995-02-28 S.I.C.M.O. Societe Industrielle Low pressure paint spray gun with improved spray head
EP0873202A4 (en) * 1994-12-16 1998-12-23 Pneumatic Syst Int Pty Ltd MULTIPURPOSE LOCKING PNEUMATIC GUN
US5803313A (en) * 1996-05-21 1998-09-08 Illinois Tool Works Inc. Hand held fluid dispensing apparatus
US6412662B1 (en) * 2001-09-07 2002-07-02 Illinois Tool Works Inc. Hot melt adhesive hand applicator
USD573227S1 (en) * 2006-06-12 2008-07-15 Titan Tool, Inc. Texture spray gun
WO2010080365A1 (en) * 2008-12-18 2010-07-15 Graco Minnesota Inc. Tooless needle change spray gun
CN102215981A (zh) * 2008-12-18 2011-10-12 格雷索明尼苏达有限公司 无工具换针喷枪
US8789770B2 (en) 2008-12-18 2014-07-29 Graco Minnesota Inc. Tooless needle change spray gun
CN102215981B (zh) * 2008-12-18 2014-04-16 格雷索明尼苏达有限公司 无工具换针喷枪
US9732893B2 (en) 2010-08-10 2017-08-15 Engineered Controls International, Llc Rapid-connect coupler
US10281073B2 (en) 2010-08-10 2019-05-07 Engineered Controls International, Llc Rapid-connect coupler
US20120280493A1 (en) * 2011-03-21 2012-11-08 Macro Technologies, Llc Rapid-connect coupler with vent-stop
US9857010B2 (en) 2011-03-21 2018-01-02 Engineered Controls International, Llc Rapid-connect coupler with vent-stop
US10718456B2 (en) 2011-03-21 2020-07-21 Engineered Controls International, Llc Rapid-connect coupler with vent-stop
US9194524B2 (en) * 2011-03-21 2015-11-24 Engineered Controls International, Llc Rapid-connect coupler with vent-stop
US10208877B2 (en) 2015-04-27 2019-02-19 Engineered Controls International, Llc Rapid-connect coupler with vent stop
US9897239B2 (en) 2015-04-27 2018-02-20 Engineered Controls International, Llc Rapid-connect coupler with vent stop
US10386017B2 (en) 2015-12-03 2019-08-20 Engineered Controls International, Llc Low emission nozzles and receptacles
US10883665B2 (en) 2015-12-03 2021-01-05 Engineered Controls International, Llc Low emission nozzles and receptacles
US11162641B2 (en) 2015-12-03 2021-11-02 Engineered Controls International Low emission nozzles and receptacles
US11796135B2 (en) 2015-12-03 2023-10-24 Engineered Controls International, Llc Low emission receptacles
US12297961B2 (en) 2015-12-03 2025-05-13 Engineered Controls International, Llc Low emission receptacles
US10518282B2 (en) 2017-04-10 2019-12-31 O2Cool, Llc Drink and misting bottle with trigger lock
US11392150B2 (en) * 2018-09-12 2022-07-19 Stopak India Pvt. Ltd. Inflator with automatic shut-off functionality
US20200276601A1 (en) * 2019-03-01 2020-09-03 William Harrison System and method for efficient and ergonomic waterproofing of joints and fasteners
US11819870B2 (en) * 2019-03-01 2023-11-21 William Harrison System and method for efficient and ergonomic waterproofing of joints and fasteners
US10875042B1 (en) 2019-09-20 2020-12-29 O2Cool, Llc Bottle closure
US12090506B2 (en) 2020-07-14 2024-09-17 Techtronic Cordless Gp Powered sprayer

Also Published As

Publication number Publication date
USB450927I5 (enrdf_load_html_response) 1975-01-28

Similar Documents

Publication Publication Date Title
US3913844A (en) Safety spray gun trigger
US4225087A (en) Lock-off means for airless sprayer
US5699967A (en) Airless spray gun diffuser
US3944141A (en) Spray gun shield and trigger safety apparatus
US4105164A (en) Trigger lock mechanism for spray guns
DE2804844C3 (de) Spritzpistole, insbesondere Hochdruckspritzpistole
US3672575A (en) Hydro blast saf-t-gun
GB1338162A (en) Spray gun
NZ500299A (en) Spray device with nozzle and valve which can be used for cleaning, fire extinguishing, blasting or spray painting
US3106347A (en) Adjustable deflector for a spray nozzle
US3181798A (en) Airless spray gun having spray and valve safety means
GB904344A (en) Mobile spraying device
US4181261A (en) Safety guard for an airless spray nozzle
TW370466B (en) Sprinkler or spray head
US3836082A (en) Trigger assembly for a spray gun
GB1133516A (en) Paint sprayer
EP3130406A1 (en) Automatic trigger-lock safety mechanism
US3219279A (en) Spray gun using high pressure coating material
US6745957B2 (en) Fire hose nozzle comprising a safety device to prevent it from being displaced through the action of the water supplying it
US4856596A (en) Latching valve actuator, nozzle and pressurized fire extinguisher utilizing same
FR2406480A1 (fr) Dispositif de nettoyage pour pistolets pulverisateurs
US5425506A (en) Conductive plastic tip guard for hydraulic spray gun
JPH0440750Y2 (enrdf_load_html_response)
US2527891A (en) Valved nozzle for fire fighting spray guns
JP3117526U (ja) スプレーガンの引金ストッパ