Vapor delivery devices and methods
In a vapor delivery device, a carrier or an expedient for an active ingredient is a liquid that can be vaporized by exposure to a concentrated, focused heating point using an efficient electrical power source. The device may have a vaporizing element and an electrical power source in a housing. A switch controls supply of electrical power to the vaporizing element from the electrical power source. A tube connects a liquid reservoir to the vaporizing element. A first valve, a second valve, and a pump are generally associated with the tube. A lever pivotally supported on or in the housing may be positioned to operate the first valve, the second valve, the pump and the switch, via pivoting movement of the lever. The device efficiently provides a uniform dose of vapor with each actuation.
1. A vapor delivery device comprising:
a housing;
a vaporizing element in the housing;
an electrical power source in the housing;
a switch for switching on and off electrical power to the vaporizing element from the electrical power source;
a liquid reservoir in the housing;
a tube connecting the liquid reservoir to the vaporizing element;
a first valve, a second valve, and a pump associated with the tube, with the pump between the first and second valves; and
a lever pivotally supported on or in the housing and positioned to operate the first valve, the second valve, the pump and the switch, via pivoting movement of the lever with the first valve comprising a projection on the lever positioned to pinch the tube closed as the lever is pivoted to actuate the device.
2. The device of claim 1 with the reservoir having flexible sidewalls and further comprising one or more spring elements pressing on the reservoir.
3. The device of claim 1 with the pump comprising an angled surface on the lever that squeezes a section of the tube as the lever pivots.
4. The device of claim 1 wherein the first valve is normally open and the second valve is normally closed, with movement of the lever closing the first valve and opening the second valve to provide a dose of vapor.
5. The device of claim 1 with the vaporizing element comprising a coil of wire with the tube adapted to supply a bolus of liquid into the coil of wire with movement of the lever.
6. The device of claim 1 with the lever including a first section pivotally attached to the housing and a second section flexibly attached to the first section, and with the first section of the lever actuating the first valve and with the second section of the lever actuating the pump.
7. The device of claim 1 further comprising a battery compartment within the housing and with a flexible circuit board extending from the battery compartment to the vaporizing element.
8. The device of claim 1 further comprising a rigid circuit board within the housing, with the switch and the vaporizing element attached to the board, and with the lever pivotally attached to the board.
9. The device of claim 8 with the second valve supported by the rigid circuit board.
10. A vapor delivery device comprising:
a housing;
a vaporizing element in the housing;
an electrical power source in the housing;
a switch for switching on and off electrical power to the vaporizing element from the electrical power source;
a liquid reservoir in the housing;
a tube connecting the liquid reservoir to the vaporizing element;
a first valve, a second valve, and a pump associated with the tube, with the pump between the first and second valves; and
a lever pivotally supported on or in the housing and positioned to operate the first valve, the second valve, the pump and the switch, via pivoting movement of the lever with the second valve including a post with the tube passing through an opening in the post and a spring urging a washer into contact with the tube.