US 7,117,893 B1Granted

Automatic fuel shutoff

AssigneeLawrence Krupa

InventorLawrence Krupa

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Abstract

An apparatus for use with an outdoor gas grill and a natural gas source. The apparatus allows an individual to have a “backup mechanism” which automatically shuts off the natural gas source after a specified amount of time, should an individual forget to turn it off after using it to cook on an outdoor grill.

Claims4

Dependent claims

A natural gas regulating mechanism comprising:

(a) an outer casing,
(b) a central mount located within the outer casing,
(c) an inner wheel centrally mounted on the central mount, the inner wheel having a top surface and a bottom surface, the inner wheel having a plurality of teeth,
(d) a timer located within the outer casing, the timer designed to keep track of time on an ongoing basis,
(e) a roller wheel attached to the timer, the roller wheel having a plurality of teeth and being vertically placed against the inner wheel, wherein the timer slowly rotates the roller wheel,
(f) a connector having a first end and a second end, the first end of the connector being attached to the top surface of the inner wheel,
(g) an outer time wheel having a top surface and a bottom surface, the bottom surface of the outer time wheel being connected to the second end of the connector, wherein the outer time wheel is located on the outer casing,
(h) a knob attached to the top surface of the outer time wheel,
(i) a plurality of shut-off teeth located on the bottom surface of the outer time wheel,
(j) an incoming gas line attached to the outer casing,
(k) an outgoing gas line attached to the outer casing,
(l) a valve having a cylindrical cross-section, the valve axially attached to the inside of the outer casing so as to constantly cover the incoming gas line, the valve being divided into four separate sections, wherein two of the sections opposing one another have holes, further wherein the valve is attached to the outer casing in such a manner to cover the incoming gas line in an off-center manner, further wherein one of the sections will cover the incoming gas line at any particular time,
(m) a plurality of notches attached to the valve, the plurality of notches extending into the outer casing,
(n) power means for providing power to the timer,
(o) wherein rotation of the outer time wheel causes the shut-off teeth to come into contact with the notches attached to the valve, wherein the valve is rotated into continual positions which alternatively cover and do not cover the flow of incoming gas into the outer casing.

12 more elements

Dependencies are inferred from the claim text.

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Abstract

A natural gas regulating mechanism comprising:

(a) an outer casing,
(b) a central mount located within the outer casing,
(c) an inner wheel centrally mounted on the central mount, the inner wheel having a top surface and a bottom surface, the inner wheel having a plurality of teeth,
(d) a timer located within the outer casing, the timer designed to keep track of time on an ongoing basis,
(e) a roller wheel attached to the timer, the roller wheel having a plurality of teeth and being vertically placed against the inner wheel, wherein the timer slowly rotates the roller wheel,
(f) a connector having a first end and a second end, the first end of the connector being attached to the top surface of the inner wheel,
(g) an outer time wheel having a top surface and a bottom surface, the bottom surface of the outer time wheel being connected to the second end of the connector, wherein the outer time wheel is located on the outer casing,
(h) a knob attached to the top surface of the outer time wheel,
(i) a plurality of shut-off teeth located on the bottom surface of the outer time wheel,
(j) an incoming gas line attached to the outer casing,
(k) an outgoing gas line attached to the outer casing,
(l) a valve having a cylindrical cross-section, the valve axially attached to the inside of the outer casing so as to constantly cover the incoming gas line, the valve being divided into four separate sections, wherein two of the sections opposing one another have holes, further wherein the valve is attached to the outer casing in such a manner to cover the incoming gas line in an off-center manner, further wherein one of the sections will cover the incoming gas line at any particular time,
(m) a plurality of notches attached to the valve, the plurality of notches extending into the outer casing,
(n) power means for providing power to the timer,
(o) wherein rotation of the outer time wheel causes the shut-off teeth to come into contact with the notches attached to the valve, wherein the valve is rotated into continual positions which alternatively cover and do not cover the flow of incoming gas into the outer casing.

12 more elements