Dispensing device
AssigneeDow Corning Corporation
InventorBernard Favart
Life of this patent
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Abstract
A dispensing device comprising a reservoir (2) and a one way valve (6) through which material may only be conducted into the reservoir (2). Reservoir (2) comprises a piston (16), a cylinder device (10) capable of permitting expansion of the capacity of the reservoir as material is conducted into the reservoir, an electrical switch means (18) adapted to detect and terminate the expansion of reservoir (2) at a predetermined capacity value, means for exerting pressure (10,16) on material within reservoir (2) when the expansion of reservoir (2) has been terminated and a one way valve (20) set to permit flow of material from reservoir (2) via an exit port whilst the pressure on the material in reservoir (20) is not less than a predetermined value.
Claims7
A dispensing device, for dispensing a material comprising
- a reservoir, having
- an entry port with a one way valve through which said material may only be conducted into the reservoir,
- an exit port comprising a one way valve set to permit flow of said material from the reservoir when said material in the reservoir has a pressure that is not less than a predetermined value,
- a piston and cylinder device capable of permitting expansion of the reservoir as the material is conducted into the reservoir through said entry port,
- an electrical switch means adapted to detect and terminate the expansion of the reservoir at a predetermined capacity value, and
- a means for exerting pressure on said material within the reservoir when the expansion of the reservoir has reached said capacity value.
Dependencies are inferred from the claim text.