EP0831230A2 - Combined two-function air compressor and jet washer device - Google Patents

Combined two-function air compressor and jet washer device Download PDF

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Publication number
EP0831230A2
EP0831230A2 EP97202738A EP97202738A EP0831230A2 EP 0831230 A2 EP0831230 A2 EP 0831230A2 EP 97202738 A EP97202738 A EP 97202738A EP 97202738 A EP97202738 A EP 97202738A EP 0831230 A2 EP0831230 A2 EP 0831230A2
Authority
EP
European Patent Office
Prior art keywords
jet washer
electric motor
compression unit
free wheel
air compression
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Withdrawn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
EP97202738A
Other languages
German (de)
French (fr)
Other versions
EP0831230A3 (en
Inventor
Giovanni Minelli
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 EP0831230A2 publication Critical patent/EP0831230A2/en
Publication of EP0831230A3 publication Critical patent/EP0831230A3/en
Withdrawn legal-status Critical Current

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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
    • F04B41/00—Pumping installations or systems specially adapted for elastic fluids
    • F04B41/06—Combinations of two or more pumps
    • 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
    • F04B41/00—Pumping installations or systems specially adapted for elastic fluids
    • F04B41/02—Pumping installations or systems specially adapted for elastic fluids having reservoirs
    • 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
    • F04B2203/00—Motor parameters
    • F04B2203/02—Motor parameters of rotating electric motors
    • F04B2203/0207—Torque

Definitions

  • This invention relates to a combined two-function air compressor and jet washer device for non-professional use.
  • Low-capacity air compressors comprising a compressed air receiver supporting the unit for compressing air drawn from the atmosphere and the electric drive motor therefore, and jet washers comprising a pump which draws water from a feed line and delivers it to a hose provided at its end with a jet gun, are both widely used.
  • devices comprising in a single unit an electric motor provided with means which enable it to be selectively connected to an air compressor and to a jet washer pump which are situated on the same support, preferably consisting of the compressed air receiver, as described in Italian patent application MN95A000008 in the name of the present applicant.
  • the object of the present invention is to provide a unit able to act both as an air compressor and as a jet washer, in which to pass from one function to the other the operator has to operate only one control, and in which disengagement of the function not to be used is automatically ensured.
  • Said object is attained within the framework of a reliable, simple and economical mechanical arrangement suitable for private use.
  • a combined device for the two functions of air compressor and jet washer comprising an electric motor with two directions of rotation provided with means for its selective connection to the air compression unit and to the jet washer pump, the shaft of said electric motor being connected respectively to the air compression unit and to the jet washer pump by two free wheels mounted with opposite dragging directions.
  • the reference numeral 1 indicates the electric motor with two directions of rotation mounted, as in the case of the other components to be described, on a frame 2 fixed to the top of the compressed air receiver 3.
  • the shaft end 4 is connected via the free wheel 41 to the jet washer pump 6, the suction side of which can be connected to a water feed line by means of the hose 7, its delivery side being connected to the hose 8 which terminates with the jet gun 9.
  • the shaft end 5 is connected via the free wheel 51 to the unit 10 compressing the air to be fed to the receiver 3, said free wheel 51 being mounted with its dragging direction opposite that of the free wheel 41.
  • the device hence operates as a jet washer because whereas the pump 6 is rotated, the air compression unit 10 is at rest.
  • the shaft of the electric motor 11 has only one output end 110, which is permanently connected to the shaft 111 of the air compression unit 16.
  • the shaft 111 is connected via the free wheel 12 to the jet washer pump 13 and, via the interposed free wheel 14 having the opposite dragging direction to the free wheel 12, carries the cam 15 (see Figure 3) which operates the connecting rod 161 of the air compression unit 16.
  • Figure 4 shows a further embodiment in which the output shaft of the electric motor 17 has two ends 171 and 172 emerging from the casing.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

A combined two-function air compressor and jet washer device, comprising an electric motor (1) the shaft of which is provided with means for its selective connection to the air compression unit and to the jet washer pump, the electric motor being of the type having two directions of rotation, the means for selectively connecting the shaft (4, 5) to the air compression unit (10) and to the jet washer pump (6) being two free wheels (41 and 51) mounted such that they have opposite dragging directions.

Description

This invention relates to a combined two-function air compressor and jet washer device for non-professional use.
Low-capacity air compressors comprising a compressed air receiver supporting the unit for compressing air drawn from the atmosphere and the electric drive motor therefore, and jet washers comprising a pump which draws water from a feed line and delivers it to a hose provided at its end with a jet gun, are both widely used.
These devices are both very costly and require a certain storage space, which greatly limit their use in the private sector.
To obviate these drawbacks, devices are known comprising in a single unit an electric motor provided with means which enable it to be selectively connected to an air compressor and to a jet washer pump which are situated on the same support, preferably consisting of the compressed air receiver, as described in Italian patent application MN95A000008 in the name of the present applicant.
Known devices have however a series of problems concerning the selective operation of the pump or compressor, achieved by frontal connectors which to pass from one function to the other require a series of operations to be carried out in which considerable attention has to be paid by the operator in order to prevent erroneous operation or damage to the machine.
In this respect, it is apparent that if the operator forgets to disconnect one of the two appliances, ie pump or compressor, when the other appliance is to be used, he not only causes undesirable overloading of the motor but also probable damage to that appliance which was not to be used.
An example would be the use of the compressor with the water pump also in operation, but not necessarily connected to the water supply.
The object of the present invention is to provide a unit able to act both as an air compressor and as a jet washer, in which to pass from one function to the other the operator has to operate only one control, and in which disengagement of the function not to be used is automatically ensured.
Said object is attained within the framework of a reliable, simple and economical mechanical arrangement suitable for private use.
Said object is attained according to the invention by a combined device for the two functions of air compressor and jet washer, comprising an electric motor with two directions of rotation provided with means for its selective connection to the air compression unit and to the jet washer pump, the shaft of said electric motor being connected respectively to the air compression unit and to the jet washer pump by two free wheels mounted with opposite dragging directions.
Further characteristics and advantages of the invention will be apparent from the description of some preferred but not exclusive embodiments thereof, illustrated by way of non-limiting example on the accompanying drawings, in which:
  • Figure 1 shows a first embodiment of the invention;
  • Figure 2 shows a second embodiment of the invention;
  • Figure 3 is a section on the plane III-III of Figure 2;
  • Figure 4 is a plan view of a third embodiment of the invention.
    • In said Figure 1, the reference numeral 1 indicates the electric motor with two directions of rotation mounted, as in the case of the other components to be described, on a frame 2 fixed to the top of the compressed air receiver 3.
    Both ends 4 and 5 of said electric motor 1 emerge from its casing.
    The shaft end 4 is connected via the free wheel 41 to the jet washer pump 6, the suction side of which can be connected to a water feed line by means of the hose 7, its delivery side being connected to the hose 8 which terminates with the jet gun 9.
    The shaft end 5 is connected via the free wheel 51 to the unit 10 compressing the air to be fed to the receiver 3, said free wheel 51 being mounted with its dragging direction opposite that of the free wheel 41.
    In this manner for each of the two directions of rotation of the electric motor 1, only one of the two members, ie of the pump 6 and the unit 10, is driven.
    It will be assumed for example that when the ends 4 and 5 of the output shaft of the electric motor 1 rotate clockwise, the free wheel 41 rotates the member connected to it, whereas the free wheel 51 operates idly.
    In this situation, the device hence operates as a jet washer because whereas the pump 6 is rotated, the air compression unit 10 is at rest.
    To switch the device functions in order to convert it into an air compressor, it is sufficient to reverse the direction of rotation of the electric motor, the conversion then being automatic.
    In this respect, with its direction anti-clockwise, the free wheel 51 locks to rotate the member connected to it, with the result that the air compression unit 10 is operated while the pump 6 remains inactive.
    A different embodiment of the invention is shown in Figures 2 and 3.
    In this embodiment the shaft of the electric motor 11 has only one output end 110, which is permanently connected to the shaft 111 of the air compression unit 16.
    The shaft 111 is connected via the free wheel 12 to the jet washer pump 13 and, via the interposed free wheel 14 having the opposite dragging direction to the free wheel 12, carries the cam 15 (see Figure 3) which operates the connecting rod 161 of the air compression unit 16.
    It is apparent that when the electric motor assumes the direction of rotation for which the free wheel 12 is active, the device operates as a jet washer because the operating cam 15 for the connecting rod 161 of the air compression unit 16 remains immobile as the respective free wheel 14 is idle.
    In contrast, on reversing the direction of rotation of the motor 11 the free wheel 14 is locked and the air compression unit 16 is operated, whereas the free wheel 12 is idle and consequently the pump 13 is inactive.
    Figure 4 shows a further embodiment in which the output shaft of the electric motor 17 has two ends 171 and 172 emerging from the casing.
    On the end 171 there is keyed the free wheel 181 for connection to the pulley 182 operating the drive belt 183 for the air compression unit 184.
    On the shaft end 172 there is keyed the free wheel 191 for connection to the jet washer pump 192 and having the opposite dragging direction to the free wheel 181.
    The method of operation of this embodiment is the same as the preceding.
    From the description it is apparent that all the objects of the invention relative to the ease of function switching from jet washer to air compressor and vice versa are attained, with the guarantee that only one of the two functions is active.
    The invention is susceptible to numerous modifications all falling within the scope of the inventive concept, for example the linkages comprising the free wheel which connect the electric motor to the pump and to the compressor can assume any form.

    Claims (3)

    1. A combined two-function air compressor and jet washer device, comprising an electric motor the shaft of which is provided with means for its selective connection to the air compression unit and to the jet washer pump, characterised in that the electric motor is of the type having two directions of rotation, the means for selectively connecting the shaft to the air compression unit and to the jet washer pump being two free wheels mounted such that they have opposite dragging directions.
    2. A device as claimed in claim 1, characterised in that both the ends of the electric motor shaft emerge from the casing and are connected, via the free wheels of opposite dragging directions, to the air compression unit and to the jet washer pump respectively.
    3. A device as claimed in claim 1, characterised in that only one end of the electric motor shaft emerges from the casing for connection via a first free wheel to the jet washer pump, and carries, by way of a second free wheel with the opposite dragging direction to the first free wheel, the operating cam for a connecting rod of the air compression unit.
    EP97202738A 1996-09-19 1997-09-04 Combined two-function air compressor and jet washer device Withdrawn EP0831230A3 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    IT96MN000029A IT1287854B1 (en) 1996-09-19 1996-09-19 COMBINED DEVICE FOR THE TWO FUNCTIONS OF AIR COMPRESSOR AND PRESSURE WASHER
    ITMN960029 1996-09-19

    Publications (2)

    Publication Number Publication Date
    EP0831230A2 true EP0831230A2 (en) 1998-03-25
    EP0831230A3 EP0831230A3 (en) 1999-06-09

    Family

    ID=11384598

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP97202738A Withdrawn EP0831230A3 (en) 1996-09-19 1997-09-04 Combined two-function air compressor and jet washer device

    Country Status (2)

    Country Link
    EP (1) EP0831230A3 (en)
    IT (1) IT1287854B1 (en)

    Cited By (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    EP1332964A1 (en) * 2002-02-05 2003-08-06 The Boeing Company Dual drive for hydraulic pump and air boost compressor
    WO2007065759A1 (en) * 2005-12-08 2007-06-14 Continental Aktiengesellschaft Compressor unit

    Family Cites Families (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE2542030A1 (en) * 1975-09-20 1977-03-24 Wilhelm Fleissner Multi-purpose spraying set - has electric motor with optional connection to air compressor, piston diaphragm pump and-or screw pump
    JPS5788278A (en) * 1980-11-21 1982-06-02 General Mach Kk Pump-compressor unit
    DE4305474C2 (en) * 1993-02-23 1997-07-10 Wei Chien Enterprise Co Ltd Portable device for oil extraction and tire inflation in vehicles

    Cited By (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    EP1332964A1 (en) * 2002-02-05 2003-08-06 The Boeing Company Dual drive for hydraulic pump and air boost compressor
    US6860726B2 (en) 2002-02-05 2005-03-01 The Boeing Company Dual drive for hydraulic pump and air boost compressor
    WO2007065759A1 (en) * 2005-12-08 2007-06-14 Continental Aktiengesellschaft Compressor unit

    Also Published As

    Publication number Publication date
    EP0831230A3 (en) 1999-06-09
    IT1287854B1 (en) 1998-08-19
    ITMN960029A0 (en) 1996-09-19
    ITMN960029A1 (en) 1998-03-19

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