Airless pump dispensing system with multi-lobe ring seal
OwnerDavid M. Deansinventor
Life of this patent
Estimating the term…
Abstract
Method and apparatus for dispensing a fluid using a dispensing container employing an airless pump, which may employ abstract or non-cylindrical shapes. The airless pump uses a chamber enclosing a fluid with a piston comprising a surface of the chamber. The chamber has an interior volume with a substantially uniform cross section along a height of the chamber, to which the piston is conformed allowing the piston to transverse the height of the chamber. The gaps between the piston and the interior of the chamber are sealed with a multi-lobe ring seal.
Claims38
An airless pump container for dispensing fluid, comprising:
- a first chamber for enclosing a fluid, wherein the first chamber has an interior with substantially uniform non-circular cross section along a height of the first chamber;
- a release valve in fluid communication with the first chamber to release the fluid contents of the first chamber upon command;
- and
- a second chamber, separated from the first chamber by a piston, wherein the piston comprises a cross section peripheral shape conforming to the substantially uniform cross section along the height of the first chamber and a channel in the circumference of the piston in which is situated a multi-lobe ring seal that seals a gap between the interior of the first chamber and the periphery of the piston and allows the piston to transverse the height of the first chamber, at least in part.
A method of sealing the space between a piston and an interior of a chamber in an airless pump having a substantially uniform non-circular cross section along a height of the chamber comprising;
- providing the piston with a shape that corresponds to the cross section of the chamber;
- providing a channel in the piston that is configured to accommodate a multi-lobe ring seal having a valley;
- placing the multi-lobe ring seal in the channel in the piston;
- and
- placing the piston in the chamber.
A method of dispensing a fluid from an airless pump, comprising:
- providing an airless pump having a chamber having an interior with a substantially uniform non-circular cross section along a height of the chamber;
- a piston with a shape that corresponds to the cross section of the chamber;
- and
- a channel in the piston that is configured to accommodate a multi-lobe ring seal having a valley;
- placing the multi-lobe ring seal in the channel in the piston;
- placing the piston in the chamber;
- providing a release valve in fluid communication with the first chamber to release the fluid contents of the first chamber upon command;
- and operating the release valve to expel the fluid.
A method of dispensing a fluid from an airless pump, comprising:
- providing an airless pump having a chamber having an interior with a substantially uniform cross section along a height of the chamber;
- a piston with a shape that corresponds to the cross section of the chamber;
- and
- a channel in the piston that is configured to accommodate a multi-lobe ring seal having a valley;
- forming the multi-lobe ring seal in situ in the channel in the piston;
- placing the piston in the chamber;
- providing a release valve in fluid communication with the first chamber to release the fluid contents of the first chamber upon command;
- and
- operating the release valve to expel the fluid.
Dependencies are inferred from the claim text.