A valve (1) for supplying fuel gas to a gas appliance comprises a valve housing (2) having a valve chamber (3) extending therethrough. Fuel gas is supplied through an inlet port (5) to the valve chamber (3) and from main and secondary outlet ports (6,7) to a burner and a pilot light jet, respectivel
A valve (1) for supplying fuel gas to a gas appliance comprises a valve housing (2) having a valve chamber (3) extending therethrough. Fuel gas is supplied through an inlet port (5) to the valve chamber (3) and from main and secondary outlet ports (6,7) to a burner and a pilot light jet, respectively, of the gas appliance. A primary valving member (35) and a secondary valving member (36) co-operate with a primary valve seat (15) and a secondary valve seat (20), respectively, for isolating the main and secondary outlet ports (6,7) from the inlet port (5). A main carrier member (30) carries the primary valving member (35) and is magnetically coupled to a first secondary carrier member (31) which is driven by a stepper motor (38). A second secondary carrier member (32) is magnetically coupled to the main carrier member (30) for carrying the secondary valving member (36). Electromagnetic coils (60,61) magnetically couple the first and second secondary carrier members (31,32) to the main carrier (30) so that the drive motor (38) can operate the main carrier (30) and in turn the primary and secondary valving members (35,36) for opening and closing primary and secondary communicating passageways (19,25) through the primary and secondary valve seats (15,20). Isolating the coils (60,61) from a power supply causes the first and second carrier members (31,32) to be decoupled from the main carrier (30), and first compression springs (65,66) urge the primary valving member (35) into engagement with the primary valve seat (15) while a second compression spring (80) urges the secondary valving member (36) into engagement with the secondary valve seat (20) the outlet ports (6,7) from the inlet port (5).
대표청구항▼
1. A valve comprising a valve housing ( 2) defining a valve chamber (3), the valve chamber (3) forming an inlet chamber (17) and an outlet chamber (18), a primary valve seat (15) separating the inlet chamber (17) from the outlet chamber (18) and defining a primary communicating passageway (19) commu
1. A valve comprising a valve housing ( 2) defining a valve chamber (3), the valve chamber (3) forming an inlet chamber (17) and an outlet chamber (18), a primary valve seat (15) separating the inlet chamber (17) from the outlet chamber (18) and defining a primary communicating passageway (19) communicating the inlet chamber (17) with the outlet chamber (18), a primary valving member (35) in the valve chamber (3) co-operating with the primary valve seat (15) for selectively closing the primary communicating passageway (19) for isolating the outlet chamber (18) from the inlet chamber (17), a secondary valve seat (20) located in the outlet chamber (18) downstream of the primary valve seat (15), the secondary valve seat (20) dividing the outlet chamber (18) into an upstream chamber (23) and a downstream chamber (24) and defining a secondary communicating passageway (25) communicating the downstream chamber (24) with the upstream chamber (23), a secondary valving member (36) being provided in the outlet chamber (18) co-operating with the secondary valve seat (20) for closing the secondary communicating passageway (25) for isolating the downstream chamber (24) from the upstream chamber (23), the secondary valving member (36) being coupled with the primary valving member (35), a drive means (38) releasably magnetically coupleable to the primary valving member (35) for urging the primary valving member (35) and the secondary valving member (36) out of engagement with the primary valve seat (15) and the secondary valve seat (20), respectively, for respectively opening the primary communicating passageway (19) for communicating the respective inlet and outlet chambers (17,18), and the secondary communicating passageway (25) for communicating the downstream chamber (24) with the upstream chamber (23), the drive means (38) and the primary valving member (35) being selectively decoupleable, and a first urging means (65,66) being provided for urging the primary valving member (35) into engagement with the primary valve seat (15) and the secondary valving member (36) into engagement with the secondary valve seat (20) when the primary valving member (35) is decoupled from the drive means (38), wherein the secondary valving member (36) is releasably magnetically coupleable to the primary valving member (35), and a second urging means (80) is provided for urging the secondary valving member (36) into engagement with the secondary valve seat (20) when the secondary valving member (36) is decoupled from the primary valving member (35).2. A valve as claimed in claim 1 in which the secondary valving member (36) is selectively decoupleable from the primary valving member (35).3. A valve as claimed in claim 1 characterised in which the secondary valving member (36) is selectively decoupleable from the primary valving member (35) independently of decoupling of the primary valving member (35) from the drive means (38).4. A valve as claimed in claim 1 in which the primary and secondary valving members (35,36) are sequentially urged out of engagement with the respective primary and secondary valving seats (15,20) by the drive means (38) when the primary valving member (35) is magnetically coupled to the drive means (38) and the secondary valving member (36) is magnetically coupled to the primary valving member (35).5. A valve as claimed in claim 4 in which the primary valving member (35) is urged out of engagement with the primary valve seat (15) before the secondary valving member (36) is urged out of engagement with the secondary valve seat (20).6. A valve as claimed in claim 1 in which the primary valving member (35) is carried on a main carrier member (30), and the drive means (38) is co-operable with a first secondary carrier member (31), the first secondary carrier member (31) forming with the main carrier member (30) a magnetic circuit, and a first magnetic field generating means (60,61) is provided for selectively generating a magnetic field for selectively coupling the main carrier member (30) and the first secondary carrier member (31), a second secondary carrier member (32) being provided for carrying the secondary valving member (36), the second secondary carrier member (32) forming a magnetic circuit with the main carrier member (30) for facilitating releasable magnetic coupling of the second secondary carrier member (32) with the main carrier member (30).7. A valve as claimed in claim 6 in which the first and second secondary carrier members (31,32) are located at respective opposite ends of the main carrier member (30).8. A valve as claimed in claim 6 in which a second magnetic field generating means (61) is provided for selectively magnetically coupling the second secondary carrier member (32) with the main carrier member (30) independently of the magnetic coupling of the main carrier member (30) with the first secondary carrier member (31).9. A valve as claimed in claim 6 in which the second urging means (80) acts between the main carrier member (30) and the second secondary carrier member (32).10. A valve as claimed in claim 6 in which the secondary valving member (36) is resiliently mounted to the second secondary carrier member (32) for facilitating relative movement between the second secondary carrier member (32) and the secondary valving member (36) for facilitating disengagement of the primary valving member (35) from the primary valve seat (15) prior to disengagement of the secondary valving member (36) from the secondary valve seat (20).11. A valve as claimed in claim 6 in which each magnetic field generating means (60,61) is an electrically powered magnetic field generating means.12. A valve as claimed in claim 11 in which the first magnetic field generating means (60) comprises a first electromagnetic coil (60) associated with the main carrier member (30) and the first secondary carrier member (31), and the second magnetic field generating means (61) comprises a second electromagnetic coil (61) associated with the main carrier member (30) and the second secondary carrier member (32), the first magnetic field generating means (60) selectively couples the second secondary carrier member (32) with the main carrier member (30).13. A valve as claimed in claim 6 in which the first urging means (65,66) acts between the valve housing (2) and the main carrier member (30) for urging the primary valving member (35) into engagement with the primary valve seat (15).14. A valve as claimed in claim 6 in which the first urging means (65,66) comprises a pair of first compression springs (65,66).15. A valve as claimed in claim 1 in which the second urging means (80) comprises a second compression spring (80).16. A valve as claimed in claim 6 in which the valve chamber (3) is an elongated chamber, and the main carrier member (30) is an elongated member extending longitudinally in the valve chamber (3) through the primary communicating passageway (19) from the inlet chamber (17) to the outlet chamber (18).17. A valve as claimed in claim 6 in which the drive means (38) comprises a drive motor (38), and a screw drive transmission (39) between the drive motor (38) and the first secondary carrier member (31), the drive shaft (42) of the drive motor is threaded (43) for engaging a correspondingly threaded bore (44) in the first secondary carrier member (31) for forming the screw drive transmission (39).18. A valve as claimed in claim 1 in which a main outlet port (6) is located in the valve housing (2) communicating with the downstream chamber (24) of the outlet chamber (18), a secondary outlet port (7) is provided in the valve housing (2) communicating with the upstream chamber (23) of the outlet chamber (18), and an inlet port (5) is provided in the valve housing communicating with the inlet chamber (17).19. A valve as claimed in claim 1 in which the drive motor is a stepper motor.20. A valve as claimed in claim 1 in which the valve (1) is adapted for controlling the fl ow of a fluid therethrough.
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이 특허에 인용된 특허 (1)
Konsky Steven J. ; Love John J. ; Santinanavat Mike C., Solenoid valve having coaxial armatures in a single coil design.
Komurian, Richard; Peuch, Julien; Becker, Nicolas; Winkelmuller, Hugues; Floranc, Alexandre, Valve unit with a sliding throttle-chamber and circuit comprising a valve.
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