EP0440428A2 - Soupape pour arme à air comprimé - Google Patents

Soupape pour arme à air comprimé Download PDF

Info

Publication number
EP0440428A2
EP0440428A2 EP91300683A EP91300683A EP0440428A2 EP 0440428 A2 EP0440428 A2 EP 0440428A2 EP 91300683 A EP91300683 A EP 91300683A EP 91300683 A EP91300683 A EP 91300683A EP 0440428 A2 EP0440428 A2 EP 0440428A2
Authority
EP
European Patent Office
Prior art keywords
chamber
piston
air
valve assembly
valve
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.)
Granted
Application number
EP91300683A
Other languages
German (de)
English (en)
Other versions
EP0440428B1 (fr
EP0440428A3 (en
Inventor
Marcel Pearson
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0440428A2 publication Critical patent/EP0440428A2/fr
Publication of EP0440428A3 publication Critical patent/EP0440428A3/en
Application granted granted Critical
Publication of EP0440428B1 publication Critical patent/EP0440428B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
    • F41B11/00—Compressed-gas guns, e.g. air guns; Steam guns
    • F41B11/70—Details not provided for in F41B11/50 or F41B11/60
    • F41B11/72—Valves; Arrangement of valves
    • F41B11/723—Valves; Arrangement of valves for controlling gas pressure for firing the projectile only

Definitions

  • This invention relates to apparatus for use with air guns and more especially, but not exclusively, to a valve assembly for supplying air under pressure to the firing chamber of an air gun.
  • a valve assembly for supplying air under pressure to the firing chamber of an air gun, the assembly including a hollow cylindrical chamber which houses a slidable piston whose external diameter is slightly less than the internal diameter of the cylindrical chamber to define an airflow passage therebetween, means for admitting air under pressure to that portion of the chamber interior which lies to one side of the piston, means for causing the piston to move along the chamber immediately before release of the air from the chamber in a sense further to compress the air present therein, and means by which the re-compressed air can be selectively released from the cylindrical chamber to the firing chamber of the air gun.
  • the piston is biased towards one end wall of the chamber by a spring, movement of the piston caused by the firing mechanism automatically effecting further compression of the air present in the chamber.
  • the valve assembly comprises a casing 1 enclosing a hollow cylindrical compression chamber 2 which houses a piston 3 mounted for sliding movement within the interior of the chamber 2.
  • One end of the piston 3 is shaped to define a sealing surface with a complementary surface of the adjacent end wall 5 of the casing when the piston 3 is moved to the right as shown.
  • the piston 3 is stepped along its length such that one end 6 is of a diameter less than that of its other end 7.
  • the diameter of the piston end 7 closely approaches the internal diameter of the chamber 1 to define an annular restricted flow passageway therebetween.
  • the piston 3 co-operates with a second piston 8 whose leading end protrudes into a bore 9 formed in the piston 3.
  • a spring 10 is mounted about the circumference of the second piston 8 and bears at one end against the trailing end of the stepped piston 3 and, at its other end, against a seal 11 mounted on the end of the piston 8 remote from the piston 3.
  • the leading end of the piston 8 is spaced from the end face of the bore 9 to define a reservoir 12 which communicates with that portion of the chamber 2 to the right hand side of the piston 3 as shown in Figure 1 by means of a passageway 14.
  • the piston 8 is formed with a central bore 15 which communicates with the left hand side (as shown in Figure 1) of the chamber 2 via a passageway 16 and with the right hand side (as shown in Figure 1) of the chamber 2 through the restricted passageway defined between the periphery of the piston 8 and the internal surface of the chamber 2. Further communication between the left and right hand sides of the chamber is effected when a passageway 17 formed in the piston 8 aligns with the passageway 14.
  • a pin may be provided to inhibit rotational movement of the piston 8 relative to piston 3 to ensure that the passageways 14,17 can properly be aligned.
  • the ends of the chamber 2 are closed by the end wall 5 and an end wall 18 which includes a passageway 19 for placing the left-hand side of the chamber 2 in communication with a conventional air pump.
  • the end wall 5 includes a passageway 20 for placing the right-hand side of the chamber 2 in communication with an air release chamber of the air gun on which the valve is mounted.
  • the passageway 20 is normally closed by the inclined end face 4 of the piston 3 making sealing contact with the complementary surface of the end wall 5. The piston is moved to the position shown in Figure 1, to open the passageway 20 when a piston stem 22 is propelled to the left as shown in the drawing by a firing mechanism of the gun.
  • air from a conventional air pump is admitted to the passageway 19 to move the seal 11 and the piston 8 against the action of the spring 10 to the right as shown to enable pressurised air to enter the chamber 2.
  • the pressurised air passes along the annular space defined between the periphery of the piston 3 completely to fill the left and right hand sides of the chamber 2 and the bore 15 with air to the required pressure.
  • the seal moves to the left to seal off the passageway 19.
  • the interior of the chamber is charged to the pressure of air admitted to the chamber by the pump.
  • the firing mechanism comes into contact with the stem 22, so moving the piston 3 against the action of the spring 10 further to compress the air present in the left-hand side of the chamber 2 and to place the passageways 17,14 in communication one with the other to cause air under increased pressure to flow from the left to the right hand side of the chamber.
  • movement of the piston opens the passageway 20 so enabling the re-compressed air present in the right hand side of the chamber to pass to the firing chamber of the air gun.
  • the back-pressure created within the passageway 20 due to the pressure of a projectile within the barrel of the gun ensures that the valve remains open for the requisite time period.
  • the compressed air entering the compression chamber 2 is subjected to a further and significant compression stage before the re-compressed air is released to the firing chamber of the air gun.
  • the air valve assembly illustrated in Figures 2 and 3 comprises a lower chamber 24 which houses a chargeable air bottle 25.
  • compressed air from the bottle 25 enters the chamber 26 in front of the piston 27 and also passes via a passageway 29 to a re-compression chamber 30.
  • the piston 27 is then advanced to the left further to compress the compressed air already present in the pump chamber 26 and the re-compression chamber 30.
  • a knock-open valve 31 including a piston 32 is located within the chamber 30, one end of the piston being shaped to define a seal with a complementary shaped surface 33 of the chamber.
  • the compressed air initially supplied by means of the bottle 25 is subjected to two further compression stages before it enters the firing chamber of the air gun.
  • the air valve assembly illustrated in Figure 4 includes a piston 40 moveable by a manually operated piston rod 41 through a compression chamber 42.
  • An 'O' ring seal 43 is carried by the piston 40 to provide a seal between the outer periphery of the piston and the inner periphery of the casing 44 of the chamber 42.
  • the piston 40 includes a leading section 45 of reduced diameter.
  • Also positioned in the air chamber is an end wall structure 46 formed with a channelled section 47 of internal diameter slightly greater than the diameter of the piston leading section 45.
  • the channel led section 47 carries an 'O' ring seal 48 to provide a seal between the outer periphery of the channel led section 47 and the adjoining internal wall of the chamber casing 44.
  • the structure 46 is formed with an outlet passageway 49 for conveying air under pressure to the firing chamber of the gun on which the valve is mounted.
  • the passageway 49 is normally closed by a knock-open valve 50 including a piston 51 having a shaped end 52 which seats against a complementary shaped surface of the structure 46.
  • the compressed air initially supplied to the chamber 42 is subjected to three further compression stages before it enters the firing chamber of the air gun.
  • the air valve comprises a piston 55 moveable through a compression chamber 57 and a manually operated piston 56 moveable through a second compression chamber 54.
  • An "O" ring seal 58 is carried by the piston 55 to provide a seal between the outer periphery of the piston 55 and the inner wall of the valve casing 71.
  • An “O" ring seal 61 is also carried by the piston 56 to provide a seal between the outer periphery of the piston 56 and the inner wall of the casing 71.
  • the piston 56 further includes a spring loaded valve 62 vented to atmosphere via a passageway 63. The spring loading is such that the valve 62 places the space between the pistons 55,56 into communication with the atmosphere when the pressure extant in the space is equal to or less than atmospheric pressure.
  • the piston 55 includes a section 64 of reduced diameter similar to piston section 45 of Figure 4. In this embodiment, however, the piston 55 is formed with an internal bore 65 within which is housed a spring loaded member 66.
  • the right hand end of the member 64 (as shown in Figure 5) is shaped to define a sealing surface 67 with a complementary shaped seating of the member 66 when the member 66 is urged to the right by the spring 68.
  • An apertured plate 69 (see Figure 6) is positioned over the left hand end of the bore 65.
  • An "O" ring seal is carried by the piston 55 to provide a seal between the piston 55 and the internal surface of the structure 59 and a further “O” ring 73 is carried by the structure 59 to provide a seal between the wall of the chamber 54 and the casing 71.
  • the left hand end of the chamber 57 is closed by a knock-open valve 74 including a piston 75.
  • the piston 75 has a shaped end which seats against a complementary seating of the structure 59 to close an exit passageway 76.
  • the piston 56 is advanced to the left as shown in the drawing to compress the air present in the chamber 54 to cause the valve 62 to move to the right to close off chamber 54 from the atmosphere.
  • the member 66 is moved to the left against the action of spring 68 to allow air under pressure to flow through the bore 65 and into recompression chamber 57.
  • the piston 56 continues to advance until it reaches the extent of its permitted movement at which time the face of the valve 62 lies in contact with or closely adjacent to the right hand side of the piston 55. Piston 56 is then partially retracted to cause the member 55 to move to the right to close off communication between chambers 54 and 57.
  • valve 62 opens to allow air from the atmosphere to flow through passageway 63 into chamber 54.
  • the piston 56 is then advanced once more towards piston 55 to move the piston 55 to the left to cause the pre-compressed air in chamber 57 to be re-compressed to a higher level than air in chamber 54. This last step can be repeated to provide even greater levels of air pressurisation within chamber 57.
  • the stem 77 On firing the air gun, the stem 77 is struck by the gun's firing mechanism to move the valve 74 off from its seating to re-compress further the air present in the chamber 57 and to enable the recompressed air to flow via the passageway 76.
  • the presence of a projectile in the firing chamber of the gun produces a higher build-up of air pressure in passageway 76 to act against the rear flange of piston 75 to cause chamber 57 to discharge completely.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Toys (AREA)
  • Nozzles (AREA)
  • Portable Nailing Machines And Staplers (AREA)
EP19910300683 1990-01-31 1991-01-30 Soupape pour arme à air comprimé Expired - Lifetime EP0440428B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9002202 1990-01-31
GB9002202A GB9002202D0 (en) 1990-01-31 1990-01-31 Improvements in and relating to apparatus for use with air guns

Publications (3)

Publication Number Publication Date
EP0440428A2 true EP0440428A2 (fr) 1991-08-07
EP0440428A3 EP0440428A3 (en) 1992-06-17
EP0440428B1 EP0440428B1 (fr) 1996-08-14

Family

ID=10670218

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910300683 Expired - Lifetime EP0440428B1 (fr) 1990-01-31 1991-01-30 Soupape pour arme à air comprimé

Country Status (4)

Country Link
EP (1) EP0440428B1 (fr)
DE (1) DE69121256T2 (fr)
ES (1) ES2094197T3 (fr)
GB (1) GB9002202D0 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994011695A1 (fr) * 1992-11-06 1994-05-26 Eric Scott Pistolet a balles de peinture et ensembles associes
US5450839A (en) * 1992-09-23 1995-09-19 Nicolaevich; Isakov S. Pneumatic launcher
US5890479A (en) * 1998-08-31 1999-04-06 Morin; Ernest Arthur Trigger assist system
GB2356690A (en) * 1999-11-18 2001-05-30 Marcell Pearson Air gun valve
US6474325B2 (en) 1999-01-22 2002-11-05 Npf Limited Gas regulator
US6550468B1 (en) 2001-04-27 2003-04-22 Tippmann Pneumatics, Inc. Trigger assist mechanism and method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1036183A (en) * 1963-03-11 1966-07-13 Fritz Walther Improvements in or relating to air guns
DE2263270A1 (de) * 1972-12-23 1974-06-27 Walter Gehmann Druckluftschusswaffe

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1036183A (en) * 1963-03-11 1966-07-13 Fritz Walther Improvements in or relating to air guns
DE2263270A1 (de) * 1972-12-23 1974-06-27 Walter Gehmann Druckluftschusswaffe

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5450839A (en) * 1992-09-23 1995-09-19 Nicolaevich; Isakov S. Pneumatic launcher
WO1994011695A1 (fr) * 1992-11-06 1994-05-26 Eric Scott Pistolet a balles de peinture et ensembles associes
US5494024A (en) * 1992-11-06 1996-02-27 Scott; Eric Paint ball gun and assemblies therefor
US5669369A (en) * 1992-11-06 1997-09-23 Scott; Eric Paint ball gun and assemblies therefor
US5890479A (en) * 1998-08-31 1999-04-06 Morin; Ernest Arthur Trigger assist system
US6474325B2 (en) 1999-01-22 2002-11-05 Npf Limited Gas regulator
GB2356690A (en) * 1999-11-18 2001-05-30 Marcell Pearson Air gun valve
GB2356690B (en) * 1999-11-18 2004-03-03 Marcel Pearson Valve supplying air under pressure to an air gun
US6550468B1 (en) 2001-04-27 2003-04-22 Tippmann Pneumatics, Inc. Trigger assist mechanism and method

Also Published As

Publication number Publication date
DE69121256T2 (de) 1997-03-20
DE69121256D1 (de) 1996-09-19
GB9002202D0 (en) 1990-03-28
EP0440428B1 (fr) 1996-08-14
EP0440428A3 (en) 1992-06-17
ES2094197T3 (es) 1997-01-16

Similar Documents

Publication Publication Date Title
US6220237B1 (en) Compressed air toy gun
US5962805A (en) Gas cartridge
JP2561429B2 (ja) 自動弾丸供給機構付玩具銃
US5613483A (en) Gas powered gun
US5791328A (en) Air valve for marking pellet gun
FR2628494A1 (fr) Ressort pneumatique pour presse et machine analogue
US8201547B2 (en) Bolt and valve mechanism that uses less gas
US4378084A (en) Release mechanism for a riveting gun comprising an overhead valve
US20100101550A1 (en) Gas operated gun mechanism
WO1998013660A1 (fr) Unite d'entrainement pneumatique
KR100418140B1 (ko) 자동적으로 발사 위치로 복귀하는 라이저를 가진 플러그 구동 장치
EP0087883A3 (fr) Fusil à air comprimé ainsi que sa munition
EP0440428A2 (fr) Soupape pour arme à air comprimé
US5701879A (en) Compressed air gun with single action pump
US6170477B1 (en) Pneumatic spear gun
US10830555B2 (en) Projectile launching system
US20030085370A1 (en) Lacquer bullet gun gas entry valve
JPS6227358B2 (fr)
EP1285216B1 (fr) Mecanisme de mise a feu d'artillerie
FI62781C (fi) Tillsatsanordning foer pneumatisk spikframmatning i en tryckluftdriven spikindrivningsanordning
JPH01285798A (ja) ガス銃の弾丸発射装置
US2673557A (en) Pneumatic gun
GB1561633A (en) Pneumatictyre valve assemblies
US4163439A (en) Apparatus for opening a delivery valve in a gas reservoir chamber of a compressed gas operated gun
GB2043847A (en) Valving Arrangement for Fluid Operated Gun

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE ES FR GB

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE ES FR GB

17P Request for examination filed

Effective date: 19921209

17Q First examination report despatched

Effective date: 19940215

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19960814

REF Corresponds to:

Ref document number: 69121256

Country of ref document: DE

Date of ref document: 19960919

EN Fr: translation not filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2094197

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19991230

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20000118

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20000127

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010131

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20010130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20011101

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20020916