WO2003052270A1 - Pompe a air avec un mouvement de va-et-vient - Google Patents

Pompe a air avec un mouvement de va-et-vient Download PDF

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Publication number
WO2003052270A1
WO2003052270A1 PCT/GB2002/005570 GB0205570W WO03052270A1 WO 2003052270 A1 WO2003052270 A1 WO 2003052270A1 GB 0205570 W GB0205570 W GB 0205570W WO 03052270 A1 WO03052270 A1 WO 03052270A1
Authority
WO
WIPO (PCT)
Prior art keywords
cylinder
air
pump
static
reciprocable
Prior art date
Application number
PCT/GB2002/005570
Other languages
English (en)
Inventor
Stephen Richards
Original Assignee
Ernest H Hill Ltd
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 Ernest H Hill Ltd filed Critical Ernest H Hill Ltd
Priority to GB0409530A priority Critical patent/GB2396892B/en
Priority to AU2002347382A priority patent/AU2002347382A1/en
Publication of WO2003052270A1 publication Critical patent/WO2003052270A1/fr

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
    • F04B33/00—Pumps actuated by muscle power, e.g. for inflating
    • 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
    • F04B25/00—Multi-stage pumps

Definitions

  • This invention relates to a manually operable hand pump for the multi-stage compression of ambient air at 1 bar to a required delivery pressure typically of 100 bar and upward.
  • Reciprocable hand pumps comprising multiple co-axial cylinder arrangements have been known for at least 90 years.
  • Such pumps sold under Applicant's"Nesthill” trade mark basically consisted of a base plate comprising a valved, ambient air inlet aperture, and a valved compressed air outlet aperture, with an innermost tube secured at its lower end to the base plate, a reciprocable tube coaxially surrounding the innermost tube to define an annular chamber and provided at an upper end with an operating handle to achieve recriprocable movement, and finally an outermost tube also secured at its lower end to the base plate and defining another annular air chamber, with successive chambers of decreasing volume, and with valve means to control air transfer from one chamber to the next, principally being developed for motor vehicle type inflation and capable of delivering at say 10-20 bar.
  • SE 463732, EP 0832359 and WO 01/57400 proposals for hand operable multiple co-axial cylinder air pumps
  • a basic object of the invention is the provision of an improved, multi-stage, reciprocable hand pump capable of delivering 100-150 bar or higher pressure.
  • a multi-stage, reciprocable hand operable air pump comprising:
  • a piston reciprocable within the inner cylinder and carried by a piston rod extending to a handle, the piston incorporating a valve to control transfer of air, during reciprocation from the annulus side of the piston to the full bore side of the piston, with a valved delivery aperture at a first end of the inner cylinder, and
  • a static tube located co-axially between the first static cylinder and the reciprocable cylinder, being spaced from both so as to define, between the external periphery of the static tube, and the internal periphery of the reciprocable cylinder a second annular chamber, of smaller volume than the first annular chamber, with at least one transfer port provided in the second end of the static cylinder for the transfer of air from the second annular chamber to the annulus side of the piston, and also between the internal periphery of the static tube, and the external periphery of the static inner cylinder an annular air admittance and transfer passage, with at least one air ingress aperture in the wall of the static tube at a first end of the static tube and connecting the annular air admittance and transfer passage to atmosphere, the static tube being located within the reciprocable cylinder, and (v) a one-way valve assembly provided at a second end of the static tube, and comprising valve means operable, on an induction stroke of the pump, to permit air at ambient pressure to flow through the annular air
  • an upstroke firstly draws a change of ambient air through the annular air admittance and transfer passage, via the then open internal valve of the one-way valve means, into the first annular chamber. Simultaneously, a partially compressed change of air is swept from the second annular chamber through the transfer port to the annulus side of the piston.
  • the internal valve means of the one way valve assembly closes, and the external valve member opens permitting air transfer from the first annular chamber to the second annular chamber, and simultaneously increasing the pressure in the fuel bore side of the piston until the valve of the delivery aperture opens at the required delivery pressure.
  • the first end of the static cylinder is sealingly engaged in a fitting eg by being screwed into a tapped bore of the fitting.
  • the fitting houses a spring-loaded, one-way valve.
  • the fitting is retained in a body member provided with a delivery bore leading to a tapped hole for connection of one end of a flexible delivery tube.
  • the body member carries an air pressure gauge, in communication with the delivery bore.
  • the body member is provided with a base plate, adapted to be engaged by a foot of a user.
  • the second end of the static cylinder sealingly engages a portion of the one-way valve assembly eg by being screwed into a tapped hole of a component, which assembly sealingly engages the internal periphery of the static tube, and the external periphery of the piston rod.
  • the one-way valve assembly is also provided with an external displaceable valve member eg an O'-ring to permit, or to prevent, air flow between the first and second annular chambers.
  • an external displaceable valve member eg an O'-ring to permit, or to prevent, air flow between the first and second annular chambers.
  • the internal one-way valve assembly comprises at least one ball as a valve member.
  • the closed end of the reciprocable cylinder is provided with a closure plug attached both to an end of the piston rod, and to a transverse, operating handle.
  • the other, open end of the reciprocable cylinder sealingly engages the external periphery of the static tube.
  • Figure 1 is a longitudinal sectional view of a pump in accordance with the invention.
  • Figure 1 A is an enlargement of a portion of Figure 1 as indicated by the arrow
  • Figure 1B is an enlargement of another portion of Figure 1 as indicated by the arrow B;
  • Figures 2 and 2B correspond to Figures 1 and 1 B respectively, but show different operational positions in the pumping cycle
  • Figure 3 corresponds to Figures 1 and 2 but shows yet different operational positions in the pumping cycle
  • Figure 3B corresponds to Figures 1B and 2B but shows yet different operational positions in the pumping cycle
  • Figure 4 is an enlargement of a portion of Figure 3 as indicated by the arrow C;
  • Figures 5 and 5A correspond to Figures 1 and 1A but show yet different operational positions in the pumping cycle.
  • the pump 1 comprises at its lower end a foot plate 2 adapted in use, to seat on the ground and to be stabilized by a foot of the user, and at its upper end is provided a transversely extending operating handle 3 adapted to be gripped by the hands of the user.
  • the pump 1 comprises a first, and inner, static cylinder 4 in which is located a reciprocable piston 5 carried by a piston rod 6 extending to the handle 3, and hence reciprocable by the handle.
  • the piston 5 is provided with a circumferential groove 7 which receives a valve in the form of an O'-ring 8 which is displaceable between flow and no-flow positions dependent upon the direction of reciprocation of the piston 5 the 'O'-ring 8 therefore controlling the flow of air between annulus side/chamber 9 of the piston 5, and full bore side/chamber 10 of the piston 5.
  • the cylinder 4 is screwed into a fitting 11 in turn screwed into a base member 12 to which the foot plate 2 is attached.
  • the fitting 11 provides a delivery aperture 13 normally closed by a spring loaded valve member 14.
  • the aperture 13 is in air flow communication via a bore 15 in the base member 12 to a flexible conduit 16 having an end fitting 17 appropriate to the article, such as an air gun, to receive a charge of compressed air.
  • the base member 12 is provided with a further bore 18 to which is connected a pressure gauge 19 so that the user can see what air pressure is being created by the pump 1 , and discharged via the delivery aperture 13 and fitting 17.
  • the first static cylinder 4 is co-axially surrounded by a second and outer reciprocable cylinder 20 having an upper, closed end 21 connected to the handle 3 for simultaneous reciprocation with the piston 5.
  • the cylinder 4 defines, with the piston rod 6, a first stage, annular chamber 22.
  • a static tube 23 is located co-axially between the first static cylinder 4 and the reciprocable cylinder 20, and is spaced from both so as to define between the external periphery 24 of the static tube 23 and the internal periphery 25 of the reciprocable cylinder 20, a second stage annular chamber 26 of smaller volume than the first stage annular chamber 22.
  • At least one transfer port 27 ( Figure 1 A) is provided in the second and lower end of the static tube 23, and between the internal periphery 28 of the static tube 23 and the external periphery 29 of the static inner cylinder 4, an annular air admittance and transfer passage 30 is provided.
  • At least one air ingress passage 31 is provided in the wall of the static tube 23 at a first, lower end 32 of the static tube 23 connecting the annular air admittance and transfer passage 30 to atmosphere, and the static tube 23 being located within the reciprocable cylinder 20.
  • valve assembly 33 is provided at a second and upper end of the static tube 23.
  • the valve assembly 33 comprises a fitting 34 having a co-axial bore 35 partially threaded so that the fitting 34 may be screwed onto the externally threaded terminal end of the static cylinder 4, with an annular skirt 36 projecting into the annular space between the external periphery of the piston rod 6, and the internal periphery of the static tube 23.
  • the valve assembly comprises a first seal in the form of an 'O'-ring 37 to seal against the external periphery of the reciprocable piston rod 6, a second 'O'-ring 38 located in an oversize groove so as to constitute a one-way valve member by being displaceable between flow (Figure 1 B) and no-flow (Figure 2B) positions and serving to seal against the internal periphery 25 of the reciprocable cylinder 20, and a third 'O'-ring 39 to seal against the internal periphery 28 of the static tube 23.
  • At least one radial transfer passage 40 is provided in the fitting 34.
  • the valve assembly 33 also comprises a further one-way valve means comprising a plurality of balls 41 each to seat in a no-flow position (Figure 2B) under gravity on an individual valve seat 42 of an ambient air admittance aperture 43 during a downstroke of the handle 3 but during an upstroke of the handle 3 being lifted from their valve seats (Figure 3B) to permit ambient air flow.
  • a further one-way valve means comprising a plurality of balls 41 each to seat in a no-flow position (Figure 2B) under gravity on an individual valve seat 42 of an ambient air admittance aperture 43 during a downstroke of the handle 3 but during an upstroke of the handle 3 being lifted from their valve seats (Figure 3B) to permit ambient air flow.
  • first stage chamber air is forced, as indicated by arrows 44 ( Figure 2B), between the external periphery 45 of the valve assembly 33, and the internal periphery 25 of the reciprocable cylinder 20 to displace the second 'O'-ring 38 downwardly, to permit air flow into second stage chamber 26, as best seen in Figure 2B, air transfer from first stage to second stage continuing until the downstroke has been completed.
  • the pump 1 in addition to introducing a second charge of ambient air as already discussed regarding Figure 1 , simultaneously effects a transfer from second stage annular chamber 26, to a third stage annular chamber 9 which is of smaller volume than the second stage chamber 26, as shown by arrows 46 via the radial transfer passages 40.
  • the stroke of the pump and the volumes of the chambers 22, 26 and 10 need to be so selected as to provide at the fitting 17 a charge of compressed air at the required pressure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Reciprocating Pumps (AREA)

Abstract

L'invention concerne une pompe à air à main décrivant un mouvement de va-et-vient, à plusieurs étages. Cette pompe comprend un premier cylindre interne statique (4), un piston (5) qui décrit un mouvement de va-et-vient au sein du cylindre interne (4) et qui est porté par une tige de piston (5) s'étendant vers un manche (3), un second cylindre externe à mouvement de va-et-vient qui entoure sur le plan coaxial le cylindre interne (4) et qui présente une extrémité fermée reliée au manche (3). Une première chambre annulaire (22) est formée pour recevoir une charge d'air à une pression atmosphérique, suite au mouvement de va-et-vient dans une première direction et pour réaliser une première compression suite au mouvement de va-et-vient dans la direction opposée. Un tube statique (23) est située sur le plan coaxial entre le cylindre statique interne (4) et le cylindre à mouvement de va-et-vient (20), afin de constituer une arrivée d'air annulaire et un passage de transfert.
PCT/GB2002/005570 2001-12-19 2002-12-09 Pompe a air avec un mouvement de va-et-vient WO2003052270A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB0409530A GB2396892B (en) 2001-12-19 2002-12-09 Reciprocable air pump
AU2002347382A AU2002347382A1 (en) 2001-12-19 2002-12-09 Reciprocable air pump

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0130264A GB0130264D0 (en) 2001-12-19 2001-12-19 Reciprocable air pump
GB0130264.5 2001-12-19

Publications (1)

Publication Number Publication Date
WO2003052270A1 true WO2003052270A1 (fr) 2003-06-26

Family

ID=9927859

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2002/005570 WO2003052270A1 (fr) 2001-12-19 2002-12-09 Pompe a air avec un mouvement de va-et-vient

Country Status (3)

Country Link
AU (1) AU2002347382A1 (fr)
GB (2) GB0130264D0 (fr)
WO (1) WO2003052270A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2398354A (en) * 2003-02-01 2004-08-18 Ernest H Hill Ltd A hand operated, multi-stage, reciprocating pump with air drying cartridge
GB2435311A (en) * 2006-02-16 2007-08-22 Gasfill Ltd Fluid compressor and motor vehicle refuelling apparatus
US8047818B2 (en) 2008-05-19 2011-11-01 Sorensen Duane A High pressure, multiple-stage air pump with valve body inlet port arrangement
WO2015099538A1 (fr) * 2013-11-12 2015-07-02 Vivid As Système de compresseur de gaz à plusieurs étapes
US9670921B2 (en) 2015-09-17 2017-06-06 Monkey Pumps, LLC Reciprocating drive mechanism with a spool vent
US10161396B2 (en) 2015-09-17 2018-12-25 Monkey Pumps, LLC Zero emission reciprocating drive pump
WO2023155356A1 (fr) * 2022-02-21 2023-08-24 靖江虎贲机械科技有限公司 Pompe à ultra haute pression à haute performance

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101994676B (zh) * 2009-08-13 2013-10-09 吴树木 一种具有压力表的携带式打气筒

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US817538A (en) * 1904-07-01 1906-04-10 Howard Wixon Compound air-pump.
US1351847A (en) * 1919-11-14 1920-09-07 Jacob G Gerhart Air-pump
SE463732B (sv) 1985-11-28 1991-01-14 Persima Invent Ab Pump foer komprimering av luft
EP0832359A1 (fr) 1995-02-17 1998-04-01 CNC-Process i Hova AB Pompe pneumatique
WO2001057400A1 (fr) 2000-02-07 2001-08-09 Precharge Ab Pompe

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US817538A (en) * 1904-07-01 1906-04-10 Howard Wixon Compound air-pump.
US1351847A (en) * 1919-11-14 1920-09-07 Jacob G Gerhart Air-pump
SE463732B (sv) 1985-11-28 1991-01-14 Persima Invent Ab Pump foer komprimering av luft
EP0832359A1 (fr) 1995-02-17 1998-04-01 CNC-Process i Hova AB Pompe pneumatique
WO2001057400A1 (fr) 2000-02-07 2001-08-09 Precharge Ab Pompe

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2398354A (en) * 2003-02-01 2004-08-18 Ernest H Hill Ltd A hand operated, multi-stage, reciprocating pump with air drying cartridge
GB2398354B (en) * 2003-02-01 2005-10-19 Ernest H Hill Ltd Reciprocable air pump
GB2435311A (en) * 2006-02-16 2007-08-22 Gasfill Ltd Fluid compressor and motor vehicle refuelling apparatus
GB2435311B (en) * 2006-02-16 2011-01-19 Gasfill Ltd Fluid compressor and motor vehicle refuelling apparatus
EP1989446B1 (fr) * 2006-02-16 2013-04-10 Gasfill Limited Compresseur de fluide et appareil de réapprovisionnement de véhicule motorisé
US8840377B2 (en) 2006-02-16 2014-09-23 Gasfill Limited Fluid compressor and motor vehicle refuelling apparatus
US8047818B2 (en) 2008-05-19 2011-11-01 Sorensen Duane A High pressure, multiple-stage air pump with valve body inlet port arrangement
WO2015099538A1 (fr) * 2013-11-12 2015-07-02 Vivid As Système de compresseur de gaz à plusieurs étapes
US9670921B2 (en) 2015-09-17 2017-06-06 Monkey Pumps, LLC Reciprocating drive mechanism with a spool vent
US10161396B2 (en) 2015-09-17 2018-12-25 Monkey Pumps, LLC Zero emission reciprocating drive pump
WO2023155356A1 (fr) * 2022-02-21 2023-08-24 靖江虎贲机械科技有限公司 Pompe à ultra haute pression à haute performance

Also Published As

Publication number Publication date
GB0130264D0 (en) 2002-02-06
GB2396892B (en) 2005-02-23
GB2396892A (en) 2004-07-07
GB0409530D0 (en) 2004-06-02
AU2002347382A1 (en) 2003-06-30

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