GB2315534A

GB2315534A - Valve assembly for gas cookers

Info

Publication number: GB2315534A
Application number: GB9615447A
Authority: GB
Inventors: Shing-Juh Lin
Original assignee: LIN SHING JUH
Current assignee: LIN SHING JUH
Priority date: 1996-07-23
Filing date: 1996-07-23
Publication date: 1998-02-04
Also published as: GB9615447D0

Abstract

A valve comprises a rod 15 engaged with a shaft 13 so as to be rotated by the shaft. Cylindrical member 17 has depressions 171 for engaging with the rod. Disc 22 secured to a housing 2 has an opening 222 communicable with conduit 32 of barrel 3 rotatable in the housing. Stem 31 is engaged in the barrel and has a plug 36 for closing a bore of the barrel when the rod is engaged in the depressions and opening the bore when the rod is rotated by the shaft to disengage the rod from the depressions. When the bore is open gas can flow from orifice 24 to aperture 23 via the bore, pathway 39, approach 371 and annular groove 37. When the conduit 32 is aligned with the opening 222 gas may flow from orifice 24 to hole 41 of nozzle 4 via gap (301, figure 3) conduit 32 and opening 222.

Description

VALVE ASSEMBLY The invention relates to a valve assembly for controlling valves of gas appliances and particularly gas cookers.

Typical gas cookers are provided for family use in which the supplied gas pressure is very low. The valve assemblies of the typical gas burner for controlling the ignition and the flame is good for use in such gas cooker of lower gas pressure only and may not be used for gas burner having a gas supply of larger gas pressure.

A typical valve assembly for gas cooker is disclosed in UK Patent Publication number GB 2211584 A and comprises an actuating member for opening either of two valve members or for opening both of the valve members. However, normally, a great friction is formed between the valve shaft and the valve body such that the valve shaft may not be operated effectively.

According to the invention, there is provided a valve assembly comprising a body including a puncture for rotatably receiving a shaft, the shaft including a slit for engaging with a rod, a cylindrical member secured in the housing and including a first end having two depressions for engaging with the rod and having a second end. A ring is secured to the second end of the cylindrical member and includes a bar formed therein, a first spring biases the rod to engage with the cylindrical member, a housing includes a first end secured to the body and includes a second end, the housing includes at least one orifice and an aperture formed therein, a disc is secured to the second end of the housing and includes an opening, a nozzle is secured to the housing and includes a hole for communicating with the recess and the opening, a barrel is rotatably engaged in the housing for defining a gap between the barrel and the housing, the barrel includes a first end having a pair of legs and a channel for engaging through the ring and the cylindrical member, the rod is engaged in the channel so as to allow the barrel to be rotated by the shaft, the barrel includes a bore and includes an outer peripheral portion having an annular groove for aligning with the aperture and includes an approach communicating the annular groove with the bore, the barrel includes a conduit for communicating the opening to the gap, the barrel includes a pathway for communicating the orifice to the bore of the barrel, a stem is slidably engaged in the bore of the barrel and includes a first end for engaging with the bar of the ring and includes a second end having a plug for enclosing the bore, a second spring biases the plug to enclose the bore, two sealing rings engaged on the barrel and arranged beside the annular groove, and a third spring biases the ring to engage with the cylindrical member, the bore of the barrel is enclosed by the plug when the rod is engaged in the depressions of the cylindrical member, and the rod is disengaged from the depressions so as to move the cylindrical member and the ring and the stem and so as to disengage the plug from the bore when the rod is rotated by the shaft, and gas from the orifice is allowed to flow into the aperture and to flow into the hole of the nozzle when the plug is disengaged from the bore and when the conduit is aligned with the opening.

FIG. 1 is an exploded view of a valve assembly according to the invention; FIG. 2 is a cross sectional view of the valve assembly; FIG. 3 is an enlarged partial cross sectional view of the valve assembly, taken from the area 3 indicated in FIG. 2; FIG. 4 is a cross sectional view similar to FIG.

2, illustrating the operation of the valve assembly; and FIG. 5 is an enlarged partial cross sectional view of the valve assembly, taken from the area 5 indicated in FIG. 4.

Referring to the drawings, and initially to FIGS.

1 to 3, the valve assembly comprises a body 1 including a puncture 12 for rotatably engaging a shaft 13 which includes a slit 131 for engaging with a rod 15. A cylindrical member 17 is secured in one end of the body 1 and includes two depressions 171 for engaging with the rod 15. A ring 18 is secured to one end of the cylindrical member 17 opposite to the depressions 171.

The ring 18 includes a bar 181. A spring 16 is engaged between the rod 15 and the shaft 13 for biasing the rod 15 to engage with the cylindrical member 17. A knob 14 is secured to the shaft 13 for rotating the shaft 13 and the rod 15.

A housing 2 includes one end secured to the body 1 by fastening screws 11 and includes two notches 21 formed in the other end for engaging with two projections 221 of a disc 22. The disc 22 includes an opening 222 formed therein. A sealing ring 223 is engaged in the opening 222 and slightly extended outward beyond the disc 22. The housing 2 includes one or more orifices 24 for coupling to a gas supplier and for receiving gas from the gas supplier. The housing 2 further includes an aperture 23 so as to supply gas to an outlet for forming a mother flame. A nozzle 4 is secured to the housing 2 and includes a hole 41 for communicating with the opening 222 (FIGS. 2 and 3).

A barrel 3 is rotatably engaged in the housing 2 and includes a pair of legs 33 and a channel 34 formed in one end for engaging through the ring 18 and the cylindrical member 17. The rod 15 is engaged in the channel 34 such that the barrel 3 may be rotated by the shaft 13 and the knob 14 via the rod 15. A stem 31 is slidably engaged in the bore of the barrel 3 and includes a plug 36 for enclosing the bore (FIG. 2). A spring 35 is engaged on the stem 31 for biasing the plug 36 to enclose the bore. The stem 31 includes one end engaged with the bar 181 of the ring 18 such that the stem 31 may be moved by the ring 18. The barrel 3 includes an annular groove 37 formed in the outer peripheral portion of the middle portion and aligned with the aperture 23, and includes an approach 371 communicating the annular groove 37 with the bore of the barrel (FIG. 2). Two sealing rings 38 are engaged on the barrel 3 and arranged beside the annular groove 37. The barrel 3 includes a conduit 32 having one end for communicating with the opening 222 (FIG. 4) and having the other end for communicating with the gap 301 formed between the barrel 3 and the housing 2. The sealing ring 223 is engaged with the barrel 3 (FIGS. 35). The gas from the orifice 24 may flow through the gap 301 and the conduit 32 and the opening 222 so as to flow into the hole 41 of the nozzle 4 when the conduit 32 is aligned with the opening 222 (FIGS. 4 and 5). The barrel 3 includes a pathway 39 for allowing the gas from the orifice 24 to flow into the barrel 3. A spring 19 is engaged between the barrel 3 and the ring 18 for biasing the ring 18 to engage with the cylindrical member 17.

In operation, as shown in FIGS. 1 and 2, the rod 15 is engaged in the depressions 171 of the cylindrical member 17 such that the stem 31 has not been moved by the cylindrical member 17 and the ring 18 at this moment and such that the plug 36 may enclose the bore the barrel 3. In addition, the conduit 32 is disengaged from the opening 222, best shown in FIG. 3.

As shown in FIGS. 4 and 5, when the rod 15 and the shaft 13 are rotated by the knob 14, the rod 15 may be disengaged from the depressions 171 and may move the cylindrical member 17 and the ring 18. against the spring 19 so as to move the stem 31 such that the plug 36 is disengaged from the bore so as to open the bore.

At this moment, the gas from the orifice 24 may flow into the bore of the barrel 3 via the pathway 39 and may thus flow into the approach 371 and the annular groove 37 and may thus flow out of the aperture 23.

The conduit 32 is aligned with the opening 222, best shown in FIG. 5, such that the gas from the orifice 24 may also flow through the gap 301 and the conduit 32 and the opening 222 so as to flow into the hole 41 of the nozzle 4.

Claims

CLAIMS:

1. A valve assembly comprising a body including a puncture for rotatably receiving a shaft, the shaft including a slit for engaging with a rod, a cylindrical member secured in the housing and including a first end having two depressions for engaging with the rod and having a second end, characterized in that: a ring is secured to the second end of the cylindrical member and includes a bar formed therein, a first spring biases the rod to engage with the cylindrical member, a housing includes a first end secured to the body and includes a second end, the housing includes at least one orifice and an aperture formed therein, a disc is secured to the second end of the housing and includes an opening, a nozzle is secured to the housing and includes a hole for communicating with the recess and the opening, a barrel is rotatably engaged in the housing for defining a gap between the barrel and the housing, the barrel includes a first end having a pair of legs and a channel for engaging through the ring and the cylindrical member, the rod is engaged in the channel so as to allow the barrel to be rotated by the shaft, the barrel includes a bore and includes an outer peripheral portion having an annular groove for aligning with the aperture and includes an approach communicating the annular groove with the bore, the barrel includes a conduit for communicating the opening to the gap, the barrel includes a pathway for communicating the orifice to the bore of the barrel, a stem is slidably engaged in the bore of the barrel and includes a first end for engaging with the bar of the ring and includes a second end having a plug for enclosing the bore, a second spring biases the plug to enclose the bore, two sealing rings engaged on the barrel and arranged beside the annular groove, and a third spring biases the ring to engage with the cylindrical member, the bore of the barrel is enclosed by the plug when the rod is engaged in the depressions of the cylindrical member, and the rod is disengaged from the depressions so as to move the cylindrical member and the ring and the stem and so as to disengage the plug from the bore when the rod is rotated by the shaft, and gas from the orifice is allowed to flow into the aperture and to flow into the hole of the nozzle when the plug is disengaged from the bore and when the conduit is aligned with the opening.

2. A valve assembly substantially as herein described with reference to the accompanying drawings.