Child safety faucet
A liquid dispensing apparatus with a child-safety feature which, in one preferred embodiment, does not permit dispensing unless both a dispensing handle and an associated lever are each independently moved. In another embodiment, dispensing is prevented unless a manually-depressable, rotatable dispensing lever and a rotatable safety lock are both simultaneously actuated.
1. A liquid dispensing apparatus with a child-safety feature rendering dispensing more difficult to commence, comprising:
a valve having an inlet and an outlet, the valve inlet defining a valve inlet axis and being in fluid communication with a source of liquid to be dispensed, and the valve outlet terminating in a nozzle or other suitable liquid dispensing end;
a plunger capable of reciprocating movement between dispensing and non-dispensing positions, the plunger movement defining a plunger axis normal to the valve inlet axis;
a manually-manipulable dispensing handle that is movable, only by exerting a force directly on the handle, from a non-dispensing position to a dispensing position;
a manually-manipulable lever that is movable relative to the handle in a direction which is not normal to the plunger axis, only by exerting a force directly on the lever, from a non-dispensing position to a dispensing-ready position in which dispensing may be permitted;
the dispensing handle being manually movable independently of a position of the lever, and the lever being manually movable independently of a position of the dispensing handle when the dispensing handle is in the dispensing position;
wherein the liquid can only be dispensed by first manually moving the lever to its dispensing-ready position and then, while maintaining the lever in its dispensing-ready position, manually moving the handle to its dispensing position.
2. The liquid dispensing apparatus of claim 1 , further comprising a stopper engaging the lever.
3. The liquid dispensing apparatus of claim 2 , further comprising a spring-loaded pad, wherein when the handle and the lever are each independently moved, the stopper constrains movement of the pad.
4. The liquid dispensing apparatus of claim 3 , wherein when the handle and the lever are each independently moved and the stopper constrains movement of the pad, the plunger is moved to the dispensing position allowing liquid to be dispensed through the valve outlet.
5. The liquid dispensing apparatus of claim 4 , wherein when only the handle and not the lever is manually manipulated, the plunger is maintained in the non-dispensing position.
6. The liquid dispensing apparatus of claim 3 , wherein the pad is spring-biased to a position allowing the handle to be in the non-dispensing position when the handle is not being manually manipulated.
7. The liquid dispensing apparatus of claim 3 , wherein the handle can be rotated about a pivot comprising the pad.
8. The liquid dispensing apparatus of claim 7 , wherein the lever is capable of rotating with the handle.
9. The liquid dispensing apparatus of claim 1 , wherein the liquid to he dispensed is hot water.
10. The liquid dispensing apparatus of claim 1 , wherein the lever is normally spring-biased to the non-dispensing position when the lever is not being manually manipulated.
11. A method of safely dispensing a liquid, comprising the steps of:
providing a valve having an inlet and an outlet, the valve inlet defining a valve inlet axis and being in fluid communication with a source of liquid to be dispensed, and the valve outlet terminating in a nozzle or other suitable liquid dispensing end;
providing a manually-manipulable dispensing handle that is movable, only by exerting a force directly on the handle, from a non-dispensing handle position to a dispensing handle position, and a manually-manipulable lever that is movable relative to the handle, only by exerting a force directly on the lever, from a non-dispensing lever position to a dispensing-ready position in which dispensing may be permitted, wherein the dispensing handle is manually movable independently of a position of the lever, and the lever is manually movable independently of a position of the dispensing handle when the dispensing handle is in the dispensing position;
providing a plunger capable of reciprocating movement between plunger dispensing and non-dispensing positions, the plunger movement defining a plunger axis normal to the valve inlet axis, and the plunger normally being located in the plunger non-dispensing position blocking the valve outlet; and
wherein the liquid can only be dispensed by first manually moving the lever in a direction which is not normal to the plunger axis and to the dispensing-ready position, and then, while maintaining the lever in the dispensing-ready position, manually moving the dispensing handle to its dispensing position, thereby causing the plunger to move to the plunger dispensing position in which the plunger no longer blocks the valve outlet, allowing liquid to be dispensed through the valve outlet.
12. The method of claim 11 , further comprising a stopper engaging the lever, and a spring-loaded pad, wherein when the handle and the lever are each independently moved, the stopper constrains movement of the pad, and the plunger is moved to the dispensing position.
13. The method of claim 12 , wherein the handle is rotated about a pivot comprising the pad.
14. The method of claim 11 , wherein when only the handle and not the lever is manually manipulated, the plunger is maintained in the non-dispensing position.
15. The method of claim 11 , wherein the lever is capable of rotating with the handle.