Fluid handling – Systems – Programmer or timer
Patent
1993-11-24
1995-04-11
Rivell, John
Fluid handling
Systems
Programmer or timer
13762422, 251 74, F16K 3148
Patent
active
054049105
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a control device which can be fitted to a tap for regulating and cutting off a flow of combustible gas, particularly for domestic cookers.
More precisely, the invention relates to a control device of the type including a base on which a knob, which is intended to be fixed to a member for operating the tap, is rotatable to regulate the gas-flow.
SUMMARY OF THE INVENTION
The object of the present invention is to provide a control device of the type specified, with which it is possible to set the time for which the tap for cutting off the gas flow remains open and which automatically returns the tap to the closure position when the set time has elapsed.
The device according to the invention may be fitted either to a domestic cooker or, in general, to any gas heating appliances in which it is necessary to adjust the extent to which a tap for regulating the gas-flow is open and the time for which it remains in the open position.
A particularly advantageous characteristic of the device according to the invention is that the extent to which the tap is open can be adjusted independently of the setting of the time for which the tap remains open and the knob can be operated to regulate the gas-flow even after the time for which the tap remains open has been selected.
BRIEF DESCRIPTION OF THE DRAWINGS
Further characteristics and advantages of the present invention will become clear in the course of the detailed description which follows with reference to the appended drawings, provided purely by way of non-limiting example, in which:
FIG. 1 is an axial section of a device according to the present invention,
FIG. 2 is an exploded perspective view of the device of FIG. 1,
FIG. 3 is an exploded perspective view of the part indicated by the arrow III in FIG. 2,
FIGS. 4 and 5 are views taken on the arrows IV and V of FIG. 2, and
FIG. 6 is a view taken on the arrow VI of FIG. 1.
DETAILED DESCRIPTION OF THE INVENTION
With reference to the drawings, a control device for fitting to a tap for regulating and cutting off a flow of combustible gas is indicated 1. The tap has not been shown in the drawings, since it is of known type. A rod which is rotatable about an axis A to operate the tap is indicated 2 in FIG. 1.
The device 1 includes a base 4 which is constituted by an annular plate with pins 6 for fixing it to an outer surface 8 (FIG. 1) of an appliance to which the device 1 is fitted. The base 4 is fixed to the surface 8 as regards rotary movements about the axis A, but can travel a distance 10 of few millimeters along the axis A (FIG. 1).
A knob, indicated 12, is formed by a hollow cylindrical body which is rotatable on the base 4 about the axis A. The end wall 14 of the knob 12 bears against the base 4 and has a cylindrical projection 16 which extends through the base 4 and is intended to be fixed, for example, by a grub screw 18, to the rod 2 which operates the gas tap.
The knob 12 contains a circular plate 20 which is fixed to the base 4 by means of a bridge-like element 22 which extends through a slot 24 in the end wall 14 of the knob 2. The bridge-like element 22 can be fixed to the base 4 by the forcing of one of its ends into a hole 26 in the base 4.
A cylindrical chamber defined between the circular plate 20 and the end wall 14 of the knob 12 houses a resilient return device and a stop mechanism which will now be described with particular reference to FIGS. 3 and 4.
A ring 28 mounted on the circular plate 20 has teeth 30 with saw-toothed profiles on its outer surface. The ring 28 is connected to the plate 20 by a pin 32 which is fixed to the circular plate 20 so that the ring 28 is free to rotate about the axis A. Within the ring 28 is a spiral spring 34 with a first end 36 which is fixed to the pin 32 and a second end 38 which is fixed to the ring 28. The ring 28 has a radial projection 40 which is intended to bear against a corresponding projection 42 (see FIGS. 2 and 5) in the knob 12.
Again with reference to FIGS. 3 and 4, the plate 20 carr
REFERENCES:
patent: 2028933 (1936-01-01), Johnson
patent: 2626661 (1953-01-01), McDowell
patent: 2837154 (1958-06-01), Harper et al.
patent: 3104861 (1963-09-01), Heyer
patent: 3820405 (1974-06-01), Hong
patent: 4823838 (1989-04-01), Ferlin
Mongarli Alessandro
Mongarli Edoardo
Mongarli Stefano
Italore S.p.A.
Rivell John
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