EP1466098A4 - Runaway protection for sprayer - Google Patents

Runaway protection for sprayer

Info

Publication number
EP1466098A4
EP1466098A4 EP03703798A EP03703798A EP1466098A4 EP 1466098 A4 EP1466098 A4 EP 1466098A4 EP 03703798 A EP03703798 A EP 03703798A EP 03703798 A EP03703798 A EP 03703798A EP 1466098 A4 EP1466098 A4 EP 1466098A4
Authority
EP
European Patent Office
Prior art keywords
pump
setpoint
sprayer
output pressure
indicating
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.)
Withdrawn
Application number
EP03703798A
Other languages
German (de)
French (fr)
Other versions
EP1466098A2 (en
Inventor
Robert Lind
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 Minnesota Inc
Original Assignee
Graco Minnesota 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 Minnesota Inc filed Critical Graco Minnesota Inc
Publication of EP1466098A2 publication Critical patent/EP1466098A2/en
Publication of EP1466098A4 publication Critical patent/EP1466098A4/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F04B49/065—Control using electricity and making use of computers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2205/00—Fluid parameters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2205/00—Fluid parameters
    • F04B2205/05—Pressure after the pump outlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2207/00—External parameters
    • F04B2207/70—Warnings

Definitions

  • Reciprocating piston pumps are commonly used as airless sprayers.
  • the inlet of the pump is placed in a paint container such as a five gallon bucket.
  • a paint container such as a five gallon bucket.
  • an airless sprayer having an electronic control with a user selectable pressure setpoint (typically continuously variable between zero and maximum pressure) monitors the actual output pressure developed by the pump. When the output pressure drops to a selectable percentage of the setpoint (in the preferred embodiment, this percentage is 50%), the control displays an empty message and the unit shuts off.
  • a selectable percentage of the setpoint in the preferred embodiment, this percentage is 50%
  • the control displays an empty message and the unit shuts off.
  • the ability to use this figure is configurable- so that, if desired, the pump can continue to run in spite of it not having anything to pump.
  • control also looks for spraying at the full on position taking place for a user configurable length of time (40 seconds in the preferred embodiment) which might occur if a hose had burst and in some cases of the sprayer attempting to pump from an empty container. If this condition is detected, a shutoff also takes place.
  • This mode may be in addition to the percentage mode described above.
  • Figure 1 shows a schematic diagram of the instant invention.
  • an airless sprayer 10 having an electronic control 12 with a user selectable pressure setpoint (typically continuously variable between zero and maximum pressure) monitors the actual output pressure developed by the pump 14. When the output pressure drops to a selectable percentage of the setpoint (in the preferred embodiment, this percentage is 50%), the control displays an empty message (or provide an audio alarm) and/or the unit shuts off.
  • a selectable percentage of the setpoint in the preferred embodiment, this percentage is 50%
  • the control displays an empty message (or provide an audio alarm) and/or the unit shuts off.
  • the ability to use this feature is configurable so that, if desired, the pump can continue to run in spite of it not having anything to pump. While the preferred embodiment of the instant invention contemplates a reciprocating piston pump, the inventive method is equally applicable to other pumps such as diaphragm or progressive cavity pumps.
  • control also looks for spraying at the full on position taking place for a user configurable length of time (40 seconds in the preferred embodiment) which might occur if a hose had burst and in some cases of the sprayer attempting to pump from an empty container 16. If this condition is detected, a shutoff also takes place.
  • This mode may be in addition to the percentage mode described above.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Reciprocating Pumps (AREA)
  • Nozzles (AREA)
  • Catching Or Destruction (AREA)

Abstract

A method for controlling an airless sprayer (10) having an electronic control (12) with a user selectable pressure setpoint monitors the actual output pressure developed by the pump (14). When the pump output pressure drops to a selectable percentage of the setpoint, the control displays an empty message and the unit shuts off.

Description

RUNAWAY PROTECTION FOR SPRAYER
TECHNICAL FIELD
BACKGROUND ART
Reciprocating piston pumps are commonly used as airless sprayers. Typically, the inlet of the pump is placed in a paint container such as a five gallon bucket.. Traditionally, there has been a perception that such pumps, when run dry, will cause the packings and other seals to fail. Because the operator may be hundreds of feet away from the sprayer or up on a ladder, such failure can take place even with an alert operator.
DISCLOSURE OF THE INVENTION
It is therefore an object of this invention to provide an airless sprayer which is resistant to failure due to being run empty or dry.
Towards this end, an airless sprayer having an electronic control with a user selectable pressure setpoint (typically continuously variable between zero and maximum pressure) monitors the actual output pressure developed by the pump. When the output pressure drops to a selectable percentage of the setpoint (in the preferred embodiment, this percentage is 50%), the control displays an empty message and the unit shuts off. Of course the ability to use this figure is configurable- so that, if desired, the pump can continue to run in spite of it not having anything to pump.
In an alternative embodiment of the instant invention, the control also looks for spraying at the full on position taking place for a user configurable length of time (40 seconds in the preferred embodiment) which might occur if a hose had burst and in some cases of the sprayer attempting to pump from an empty container. If this condition is detected, a shutoff also takes place. This mode may be in addition to the percentage mode described above.
These and other objects and advantages of the invention will appear more fully from the following description made in conjunction with the accompanying drawings wherein like reference characters refer to the same or similar parts throughout the several views.
BRIEF DESCRIPTION OF DRAWINGS
Figure 1 shows a schematic diagram of the instant invention.
BEST MODE FOR CARRYING OUT THE INVENTION
Towards this end, an airless sprayer 10 having an electronic control 12 with a user selectable pressure setpoint (typically continuously variable between zero and maximum pressure) monitors the actual output pressure developed by the pump 14. When the output pressure drops to a selectable percentage of the setpoint (in the preferred embodiment, this percentage is 50%), the control displays an empty message (or provide an audio alarm) and/or the unit shuts off. Of course the ability to use this feature is configurable so that, if desired, the pump can continue to run in spite of it not having anything to pump. While the preferred embodiment of the instant invention contemplates a reciprocating piston pump, the inventive method is equally applicable to other pumps such as diaphragm or progressive cavity pumps.
In an alternative embodiment of the instant invention, the control also looks for spraying at the full on position taking place for a user configurable length of time (40 seconds in the preferred embodiment) which might occur if a hose had burst and in some cases of the sprayer attempting to pump from an empty container 16. If this condition is detected, a shutoff also takes place. This mode may be in addition to the percentage mode described above.
It is contemplated that various changes and modifications may be made to the method without departing from the spirit and scope of the invention as defined by the following claims.

Claims

1. A method for protecting a pump having a control with a user selectable pressure setpoint comprising the steps of:
selecting a setpoint;
monitoring the actual output pressure developed by said pump;
determining when said pump output pressure drops to a predetermined percentage of said setpoint; and
providing a means for indicating an error condition.
2. The method of claim 1 wherein said means for indicating an error condition comprises a visual indicator.
3. The method of claim 1 wherein said means for indicating an error condition comprises a audio indicator.
4. The method of claim 1 wherein said means for indicating an error condition comprises disabling the unit from spraying.
EP03703798A 2002-01-15 2003-01-14 Runaway protection for sprayer Withdrawn EP1466098A4 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US34904202P 2002-01-15 2002-01-15
US349042P 2002-01-15
PCT/US2003/001021 WO2003059521A2 (en) 2002-01-15 2003-01-14 Runaway protection for sprayer

Publications (2)

Publication Number Publication Date
EP1466098A2 EP1466098A2 (en) 2004-10-13
EP1466098A4 true EP1466098A4 (en) 2006-01-11

Family

ID=23370664

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03703798A Withdrawn EP1466098A4 (en) 2002-01-15 2003-01-14 Runaway protection for sprayer

Country Status (7)

Country Link
US (1) US20040258532A1 (en)
EP (1) EP1466098A4 (en)
JP (1) JP2005515341A (en)
KR (1) KR20040075349A (en)
CN (1) CN1633563A (en)
AU (1) AU2003205129A1 (en)
WO (1) WO2003059521A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014209159A1 (en) * 2014-05-14 2015-11-19 Wiwa Wilhelm Wagner Gmbh & Co Kg Method for controlling a pump system and pump system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4189005A (en) * 1977-11-07 1980-02-19 Mcloughlin John Fire truck control means
US4552058A (en) * 1983-11-21 1985-11-12 Allis-Chalmers Corporation Air flow control system having minimum variation in volume
US4781536A (en) * 1986-09-10 1988-11-01 Hicks Russell R Low-flow pump-off control
US5888051A (en) * 1994-08-05 1999-03-30 Mcloughlin; John E. Pump pressure control system
US6254353B1 (en) * 1998-10-06 2001-07-03 General Electric Company Method and apparatus for controlling operation of a submersible pump

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
No further relevant documents disclosed *

Also Published As

Publication number Publication date
EP1466098A2 (en) 2004-10-13
JP2005515341A (en) 2005-05-26
US20040258532A1 (en) 2004-12-23
CN1633563A (en) 2005-06-29
KR20040075349A (en) 2004-08-27
AU2003205129A1 (en) 2003-07-30
WO2003059521A2 (en) 2003-07-24
AU2003205129A8 (en) 2003-07-30
WO2003059521A3 (en) 2004-02-26

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