Delivery devices
First Claim
1. A delivery device actuatable to deliver substance, comprising:
- a delivery outlet from which substance is in use delivered;
a gas chamber containing a gas and being of reducible volume, wherein a reduction in the volume of the gas chamber to a predeterminable volume acts to pressurize the contained gas to a predeterminable pressure;
a seal element disposed between the gas chamber and the delivery outlet; and
an opening mechanism configured, on reduction of the volume of the gas chamber to a predeterminable volume, to open the seal element, whereupon a gas flow from the gas chamber acts to deliver substance from the delivery outlet.
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0 Petitions
Accused Products
Abstract
A delivery device for and method of delivering substance, the delivery device comprising: a delivery outlet (7) from which substance (5) is in use delivered; a gas chamber (17) containing a gas and being of reducible volume, wherein a reduction in the volume of the gas chamber (17) to a predeterminable volume acts to pressurize the contained gas to a predeterminable pressure; a seal element (11) disposed between the gas chamber (17) and the delivery outlet (7); and an opening mechanism configured, on reduction of the volume of the gas chamber to a predeterminable volume, to open the seal element (11), whereupon a gas flow from the gas chamber (17) acts to deliver substance (5) from the delivery outlet (7).
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Citations
43 Claims
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1. A delivery device actuatable to deliver substance, comprising:
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a delivery outlet from which substance is in use delivered;
a gas chamber containing a gas and being of reducible volume, wherein a reduction in the volume of the gas chamber to a predeterminable volume acts to pressurize the contained gas to a predeterminable pressure;
a seal element disposed between the gas chamber and the delivery outlet; and
an opening mechanism configured, on reduction of the volume of the gas chamber to a predeterminable volume, to open the seal element, whereupon a gas flow from the gas chamber acts to deliver substance from the delivery outlet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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41. A delivery device, comprising:
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a gas-filled chamber of variable volume;
a delivery outlet coupled to the chamber and from which substance is deliverable, carried by the gas from the chamber;
a seal between the chamber and the delivery outlet; and
opening means for opening the seal on reduction of the volume of the chamber to a predeterminable volume, to allow the gas pressurized by the reduction in the volume of the chamber to flow through the delivery outlet.
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42. A method of delivering substance, comprising the steps of:
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reducing the volume of a gas-filled chamber to pressurize the gas contained therein;
when the volume of the chamber is reduced to a predeterminable volume, providing a fluid connection between the chamber and a delivery outlet such as cause the pressurized gas to deliver substance from the delivery outlet.
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43-44. -44. (canceled)
Specification