FR2628186A1 - Automatic supply valve for gas burner - has spring-closed conical valve opened by weight of cooking utensil acting on vertical push rod - Google Patents

Abstract

The gas supply pipe to the burner passes through a valve situated below the burner plate (1). The valve comprises a body (8) with offset inlet and outlet (9,10) and a vertically mobile conical plug (6). The plug is spring-loaded (7) to close. A vertical spindle (4) extends from the valve plug (6) and terminates just above the hot-plate level (1). The spindle is fitted with a heat deflector (16). The weight of a utensil on the spindle opens the valve and the burner is lit by the pilot light. ADVANTAGE - Enables automatic lighting and extinguishing of burner by purely mechanical means.

Description

FRENCH REPUBLIC NOR publication: 2,628,186 (to be used only for

  the NATIONAL INSTITUTE reproduction orders)

OF OWNERSHIP; INDUSTRIAL TE

  INDUSTRIAL PROPERTY N national registration: 88 02642 PARIS

  Int Ci 4: F 24 C 3/12; F 23 N 1/00 ,.

  A1 PATENT APPLICATION

  ) Date of filing: March 2, 1988.) Applicant (s): National Service says: GAZ DE FRANCE.

-FR. ) Priority

  - Inventor (s) Jacques Pistien; Gilles Grandveau.

  ) Date of public availability of the

  application: BOPI "Patents" n 36 of September 8, 1989.

  (References to other national documents appearing

rentés: Q Holder (s):

(Agent (s): Cabinet Weinstein.

  (ô Gas heater fitted with an automatic system for opening and closing the gas supply.

  The present invention relates to a gas heating appliance provided with an automatic opening and

gas supply shutdown.

  This system, whose structure and operation are purely mechanical, consists essentially of a finger

  4 vertically movable whose lower end forms or is.

  associated with a valve 6 which is housed in a body 8 and which is constantly stressed by a spring 7 to keep closed

  em gas inlet to the device, while the pressure of a reci-

  against the upper end 5 of the finger 4, against the force of the spring 7, establishes the communication of the gas with the device. ', The invention applies to gas heating devices;

  various and such as cookers or hot tables.

  oe N-1 rlet sn 772 PARIS CEDEX 15 N El --À ...---.: - l * k I'110 / DItA5I :: II KIA'I <MAi [: 't7 r ,, l = l nnvtinn - 7R732 PARIS CEDEX15 The present invention relates to a gas heating appliance, such as a stove, heating table or the like, provided with an automatic opening and

gas supply shutdown.

  We know that, especially in large kitchens, it is more practical and efficient for the user to leave the open burners on, which we do not need immediately, rather than turning them off and on again each time. once we have it

need.

  Therefore, it is useful to have a system allowing the automatic switching on and off of

  burners by detection of containers.

  Also, gas heating devices have already been proposed comprising systems automatically opening and closing the gas supply respectively when a container or the like is placed on the device and when withdrawal

container of this appliance.

  However, the systems proposed until now have been of the electronic or electro-mechanical type, and have remained most of the time expensive and of a

reliability sometimes questionable.

  In addition, these systems, generally associated with a solenoid valve, required, as we understand, the supply of electrical energy to ensure its operation. Therefore, the present invention aims to remedy the disadvantages of cost and complexity of previous systems, by proposing particularly simple and reliable systems capable

  to equip heating appliances of any type.

  To this end, the subject of the invention is a gas heating appliance of the cooker, heating table or similar type and comprising a system which automatically performs the opening and closing of the gas supply respectively during the installation of 'a container or the like on this device and when removing the container from the device, characterized in that said system, the structure and operation of which are purely mechanical, comprises a vertically movable finger whose lower end is interposed on the supply of gas to the apparatus and forms a valve which is constantly stressed by a spring or the like to keep the gas supply closed, while a pressure of the container on the upper end of said finger, against the force of the spring, establishes the

  gas communication with the appliance.

  According to a preferred embodiment, the aforementioned valve, having for example a frustoconical shape, slides in a body crossed by an inlet and an outlet for gas, this inlet and / or this outlet forming a seat for said valve, while the finger is detachably attached, for example by

screwing, on the valve.

  It will also be specified that the finger is fixed to the valve by means of a thermally insulating sleeve. According to yet another characteristic of the invention, the finger-valve assembly carries a cup

  downward concavity protection.

  We will also add here that the valve spring bears on the one hand in a housing provided in this valve and on the other hand on a base of the integral body

of the device.

  According to yet another characteristic of the invention, the valve comprises at its upper part a cylindrical part in which the finger is screwed and which slides in a barrel surmounting the body by

  - the intermediary of at least one seal.

  But other features and advantages of

  the invention will appear better in the description

  detailed description which follows and refers to the single appended drawing, given solely by way of example, and showing in axial section a container detection system associated with a

  gas heater according to this invention.

  As can be seen in the attached single figure, a gas heating appliance of the type concerned by the present invention comprises an upper plate 1 forming, for example a grid and intended to receive containers, while under this plate or this grid is provided. a wall 2 forming for example a bottom and on which the system 3 according to this invention is fixed, it being understood that the burner or burners of the apparatus capable of heating the containers have not been shown and

  obviously located at the grid or tray 1.

  The system 3, whose structure and operation are purely mechanical, essentially consists of a vertically movable finger 4 whose upper end 5 protrudes slightly above the grid 1, and whose lower end forms or is associated with a valve 6 which is constantly urged upwards by a spring 7 and which is housed

  in a body 8 integral with the wall 2.

  The body 8 has an inlet 9 and a gas outlet, which outlet forms a seat 11 on which the valve 6 normally takes support to prevent

  the gas supply to a burner of the appliance.

  According to the embodiment shown in the figure, the valve 6 has a substantially frustoconical shape extending upwards by a cylindrical part 12 sliding by means of a seal.

  14 in a fMt 13 surmounting the body 8.

  As can be seen in the figure, the finger 4 is screwed into the cylindrical part 12 of the valve 6, and it can be fixed to this valve by means of a thermally insulating sleeve 15, which is useful because of the proximity of the burner flames. A protection cup with a concavity facing downwards and which is carried by the finger 4 - valve 6 assembly has been shown at 16. This cup 16 can be fixed by a screw 17 on a tubular element 18 fitted in the insulating sleeve 15. , itself fitted into the upper cylindrical part 12 of the valve 6, it being understood that the lower end 4a of the finger 4

  is screwed into the tubular element 18.

  As it clearly appears in the figure, the spring 7 is supported between the bottom of a housing 19 formed in the valve 6 and the base 20 of the body 8

secured to the device.

  However, for a better understanding of the invention, the operation of the device will be explained below.

system which has just been described.

  The ignition of the burner (not shown) is, as known per se, ensured by a permanent flame forming a pilot light (not shown). When a container is placed on the grid 1, the bottom of this container will act on the end 5 of the finger 4 which will be pushed down against the force of the spring 7 and will thus open the "tap", since the lower end of the valve 6 will be released from the seat 11. This means that the burner will be

lit by the pilot.

  When the container is removed from the grid 1, the finger 4 will be actuated upwards, under the effect of the compression force of the spring 7, which will interrupt the supply of gas to the device, as seen. on the face. A simple, reliable and space-saving system has therefore been produced according to the invention which, moreover, can be easily mounted on any device of

gas heating.

  Of course, the invention is in no way limited to the embodiment described and illustrated which has not

was given only as an example.

  This is how the gas inlet and outlet can constitute any type of threaded connections in the body 8. Also, the shape of the valve 6 and the shape of the housing in the body 8 receiving this valve can be any for closing the gas inlet and / or outlet. Similarly, the finger 4 and the valve 6 could constitute a single piece, obtained by

  example by molding, without departing from the scope of the invention.

  This means that this invention includes all the technical equivalents of the means described and their combinations if these are carried out according to

his mind.

Claims (6)

  1. Gas-fired heating appliance of the stove, heating table or similar type and comprising a system that automatically opens and closes the gas supply respectively when a container or the like is placed on this appliance, and when removing the container from this device, characterized in that said system (3), the structure and operation of which are purely mechanical, comprises a vertically movable finger (4) whose lower end is interposed on the arrival of the gas to the apparatus and forms a valve (6) which is constantly stressed by a spring or the like (7) to keep the gas supply closed, while a pressure of the container on the upper end (5) of the finger (4 ) against the force of the spring (7), establishes the   gas communication with the appliance.   2. Apparatus according to claim 1, characterized in that the aforementioned valve (6), having for example a frustoconical shape, slides in a body (8) crossed by an inlet (9) and an outlet (10) of gas, this inlet and / or outlet forming a seat for said valve, while the finger (4) is fixed so   removable, for example by screwing on the valve (6).   3. Apparatus according to claim i or 2, characterized in that the finger (4) is fixed to the valve (6) via a thermally insulating sleeve (15).   4. Apparatus according to one of claims 1 to   3, characterized in that the finger - valve assembly carries a protective cup (16) with a concavity turned towards the bottom.   5. Apparatus according to one of claims 1 to   4, characterized in that the spring (7) bears on the one hand in a housing (19) formed in the valve (6) and on the other hand on a base (20) of the body (8) integral with the apparatus.   6. Apparatus according to one of claims 1 to   , characterized in that the valve (6) has at its upper part a cylindrical part (12) into which the finger (4) is screwed and which slides in an fQt (13) surmounting the body (8) via 'at   minus a seal (14). l t J 19.84 Co 9.7m / n19 (8 o,