EP0647783A1 - Pompe à air - Google Patents

Pompe à air Download PDF

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Publication number
EP0647783A1
EP0647783A1 EP94113661A EP94113661A EP0647783A1 EP 0647783 A1 EP0647783 A1 EP 0647783A1 EP 94113661 A EP94113661 A EP 94113661A EP 94113661 A EP94113661 A EP 94113661A EP 0647783 A1 EP0647783 A1 EP 0647783A1
Authority
EP
European Patent Office
Prior art keywords
pressure
air pump
air
relief valve
pump according
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Withdrawn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
EP94113661A
Other languages
German (de)
English (en)
Inventor
Günter Thanscheidt
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.)
SKS Metaplast Scheffer Klute GmbH
Original Assignee
SKS Metaplast Scheffer Klute GmbH
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 SKS Metaplast Scheffer Klute GmbH filed Critical SKS Metaplast Scheffer Klute GmbH
Publication of EP0647783A1 publication Critical patent/EP0647783A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • F04B49/22—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 by means of valves
    • 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
    • F04B2207/701—Sound

Definitions

  • the present invention relates to an air pump with a compressor part for generating compressed air and an outlet channel connected to the compressor chamber via which the compressed air flows out, and with a monitoring device for monitoring a predetermined setpoint for the air pressure.
  • Air pumps of the aforementioned type for example for inflating bicycle tires, motorcycle tires or car tires, can be designed as a so-called standing compressor with a housing with a standing area on the underside and are generally actuated via a piston provided with a handle, which in the compressor chamber during the pumping process in axial direction Direction is moved up and down. It is also known to provide such air pumps with a manometer so that the air pressure reached can be read.
  • the output of the present invention is based on this prior art to provide an air pump of the type mentioned, which indicates to the user via a monitoring device that a previously set target pressure has been reached, without it being necessary for the user to use a pressure gauge during the pumping process observed.
  • a pressure relief valve is connected as a monitoring device to the compressor chamber, which opens automatically when the predetermined pressure setpoint is exceeded and generates an acoustic signal through compressed air flowing out through a fine bore.
  • the user can set this pressure setpoint, for example, by rotating a part attached to the air pump with a scale-like graduation on the visible side. The hissing sound of the escaping Compressed air indicates that the set pressure has been exceeded.
  • the pressure relief valve is designed so that when the pressure setpoint is exceeded, compressed air is blown off only briefly and then the pressure relief valve closes again immediately.
  • This lower part consists of a housing 10 with an axial channel 11 in the left area, into which a hose can be inserted (not shown) and which serves as an outlet channel for the compressed air.
  • This outlet channel 11 is connected at its lower end to the cylinder space 13 via a connecting channel 12 which runs horizontally and is sealed on one side with a stopper.
  • a check valve is installed between the compressor chamber and the cylinder chamber 13, which only allows compressed air in the direction of the compressor chamber to the cylinder chamber 13.
  • This cylinder chamber 13 is in turn connected to the compressor chamber (not shown) via an axial connecting bore 14 in its ceiling area.
  • a cylindrical groove 15 which concentrically surrounds the cylinder space receives a cylinder tube (not shown) which encloses the compressor space in which the piston of the auxiliary air pump is moved up and down.
  • the housing 10 is flat on the underside, which provides a footprint 16 for the air pump.
  • the cylinder chamber 13 On the side opposite the connecting channel 12 the cylinder chamber 13 is connected to the pressure relief valve via a further horizontal radial connecting channel 17.
  • This horizontal connecting channel 17 opens into a vertical connecting channel 18 which extends in the axial direction of the tappet 19 of the pressure relief valve.
  • the plunger 19 of the pressure relief valve is connected at its lower end to a piston 20 which can be moved axially up and down in the cylinder chamber 21.
  • the piston 20 is seated in the region of a seal 22 on the valve seat 23, in its lower position in which the pressure relief valve is closed.
  • the seal 22 is received in a cylindrical recess on the underside of the piston 20.
  • the plunger 19 axially surrounds a helical spring 24 on the outside, the upper part of which is received in the cylinder space 25 of the sliding sleeve 26.
  • This sliding sleeve 26 has a cylindrical side wall and on the top a cap 27 integrally connected to the side wall, which closes the end of the cylinder chamber 25 and the underside of which forms an abutment surface for the upper end of the helical spring 24.
  • this cap 27 of the sliding sleeve 26 bears against the ring wall 28.
  • This ring wall 28 has a thread-like slope due to an oblique cut.
  • the ring wall 28 with the thread-like pitch is formed on the underside of the closure part 29.
  • This closure part 29 consists in principle of a kind of cap with a circular outline, which, as can be seen from FIG.
  • the air pressure is now increased by pumping and the set pressure set on the cap of the closure part 29 is reached, then the pressure force which acts on the end face of the plunger 19 from below is in equilibrium with the spring force acting on the plunger from above through the helical spring 24 . If the target pressure is exceeded, the plunger 19 moves upwards and lifts off its valve seat 23, so that air can initially flow through the channel 18 into the cylinder chamber 21 and from there into the cylinder chamber 25 and through the bore 37 in the cap 27 and additionally through the opening, which is created by the movement of the cap 27 in the guide bore, can escape into the cylinder space 35, from where it passes through the Bore 38 in the cap of the closure part 29 escapes to the outside.
  • the height position of the sliding sleeve 26 is changed. If, for example, the sliding sleeve 26 is pressed down further by rotating the ring wall 28, the coil spring 24 is tensioned more, the pressure on the tappet 19, 20 increases and the tappet consequently only lifts off the valve seat 23 when the air pressure in the channel 18 is higher. The blowing off of the air through the fine bore 37 in the cap 27 of the sliding sleeve 26 gives the user the acoustic signal that the desired target pressure has been exceeded.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Compressor (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)
EP94113661A 1993-10-06 1994-09-01 Pompe à air Withdrawn EP0647783A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9315157U DE9315157U1 (de) 1993-10-06 1993-10-06 Luftpumpe
DE9315157U 1993-10-06

Publications (1)

Publication Number Publication Date
EP0647783A1 true EP0647783A1 (fr) 1995-04-12

Family

ID=6899024

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94113661A Withdrawn EP0647783A1 (fr) 1993-10-06 1994-09-01 Pompe à air

Country Status (3)

Country Link
EP (1) EP0647783A1 (fr)
JP (1) JPH07217538A (fr)
DE (1) DE9315157U1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998021476A1 (fr) * 1996-11-11 1998-05-22 Roberto Siviero Pompe coaxiale a piston alternatif du type soupape, manuelle ou a moteur, destinee specialement a des embarcations telles qu'un canot pneumatique
CN109505752A (zh) * 2018-12-27 2019-03-22 昆山十全塑胶五金产品有限公司 可预设压力值的打气筒

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWM494839U (zh) * 2014-10-06 2015-02-01 Jiao Hsiung Industry Corp 具警示聲音的充氣裝置轉接件

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1182102A (en) * 1966-09-02 1970-02-25 Derek John Walters An improvement in or relating to foot operated air pumps incorporating pressure gauges for motor vehicles.
FR2437509A1 (fr) * 1978-09-28 1980-04-25 Rite Autotronics Corp Perfectionnement a une pompe a air
DE3137921A1 (de) * 1981-09-21 1983-04-07 Willfred 1000 Berlin Kollodzey Druckregulierbare handluftpumpe und druckregulierbares ventil fuer luftgefuellte gegenstaende

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1182102A (en) * 1966-09-02 1970-02-25 Derek John Walters An improvement in or relating to foot operated air pumps incorporating pressure gauges for motor vehicles.
FR2437509A1 (fr) * 1978-09-28 1980-04-25 Rite Autotronics Corp Perfectionnement a une pompe a air
DE3137921A1 (de) * 1981-09-21 1983-04-07 Willfred 1000 Berlin Kollodzey Druckregulierbare handluftpumpe und druckregulierbares ventil fuer luftgefuellte gegenstaende

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998021476A1 (fr) * 1996-11-11 1998-05-22 Roberto Siviero Pompe coaxiale a piston alternatif du type soupape, manuelle ou a moteur, destinee specialement a des embarcations telles qu'un canot pneumatique
CN109505752A (zh) * 2018-12-27 2019-03-22 昆山十全塑胶五金产品有限公司 可预设压力值的打气筒
CN109505752B (zh) * 2018-12-27 2023-12-12 昆山十全塑胶五金产品有限公司 可预设压力值的打气筒

Also Published As

Publication number Publication date
DE9315157U1 (de) 1993-12-09
JPH07217538A (ja) 1995-08-15

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