Piston for dispensing device, dispensing device, product containing dispensing device, method of filling, and method of dispensing
OwnerPradeep Yohanne Guptainventor
Life of this patent
Estimating the term…
Abstract
A piston for a pressurized container (i.e., “aerosol can”), the piston including a body having circumferential fins, with the fins being of uniform thickness, decreasing thickness radially away from the body, or varying thickness circumferentially. Further disclosed are container precursors and containers incorporating such a piston, and methods of filling and dispensing from such containers.
Claims50
A container precursor suitable for making a pressurized product dispensing container, the precursor comprising:
- a hollow cylindrical body with a top end suitable for receiving a valved cap, and a bottom end suitable for receiving a bottom wall, defining a reservoir;
- and,
- a piston positioned within the reservoir, dividing the reservoir into an upper product containing chamber, and a lower propellant containing chamber, wherein the piston comprises a body and at least one fin circumferentially positioned around the body, wherein the fin is of uniform thickness.
A piston for use in a pressurized piston operated product dispensing container, the piston comprising
- a body;
- and,
- a first fin and a second fin, both circumferentially positioned around the body, wherein each fin forms an inclusive angle with the body in the range of greater than 0° to about 90°, and wherein the thickness of the fins decreases radially away from the body.
A container precursor suitable for making a pressurized product dispensing container, the precursor comprising:
- a hollow cylindrical body with a top end suitable for receiving a valved cap, and a bottom end suitable for receiving a bottom wall, defining a reservoir;
- and,
- a piston positioned within the reservoir, dividing the reservoir into an upper product containing chamber, and a lower propellant containing chamber, wherein the piston comprises a body and a first fin and a second fin, both circumferentially positioned around the body, wherein each fin forms an inclusive angle with the body in the range of greater than 0° to about 90°, and wherein the thickness of the fins decreases radially away from the body.
A method of dispensing from a container, the container comprising a hollow cylindrical body with a top end and a bottom end, defining a reservoir, a bottom wall sealing the bottom end, and a valved cap sealing the top end, and a piston positioned within the reservoir, dividing the reservoir into an upper chamber containing a product, and a lower chamber containing a propellant, wherein the piston comprises a body and a first fin and a second fin both fins circumferentially positioned around the body, wherein each fin forms an inclusive angle with the body in the range of greater than 0° to about 90° and wherein the thickness of the fins decreases radially away from the body, the method comprising:
- (A) operating the valved cap to dispense product.
A piston for use in a pressurized piston operated product dispensing container, the piston comprising
- a body;
- and,
- at least one fin circumferentially positioned around the body, wherein the thickness of the fin varies circumferentially around the fin.
A container precursor suitable for making a pressurized product dispensing container, the precursor comprising:
- a hollow cylindrical body with a top end suitable for receiving a valved cap, and a bottom end suitable for receiving a bottom wall, defining a reservoir;
- and,
- a piston positioned within the reservoir, dividing the reservoir into an upper product containing chamber, and a lower propellant containing chamber, wherein the piston comprises a body and at least one fin circumferentially positioned around the body, wherein the thickness of the fin varies circumferentially around the fin.
A container comprising:
- a hollow cylindrical body with a top end and a bottom end, defining a reservoir, a bottom wall sealing the bottom end, and a valved cap sealing the top end;
- and,
- a piston positioned within the reservoir, dividing the reservoir into an upper chamber, and a lower chamber, wherein the piston comprises a body and at least one fin circumferentially positioned around the body, wherein the thickness of the fin varies circumferentially around the fin.
A method of dispensing from a container, the container comprising a hollow cylindrical body with a top end and a bottom end, defining a reservoir, a bottom wall sealing the bottom end, and a valved cap sealing the top end, and a piston positioned within the reservoir, dividing the reservoir into an upper chamber containing a product, and a lower chamber containing a propellant, wherein the piston comprises a body and at least one fin circumferentially positioned around the body, wherein the thickness of the fin varies circumferentially around the fin, the method comprising:
- (A) operating the valved cap to dispense product.
A container precursor suitable for making a pressurized product dispensing container, the precursor comprising:
- a hollow cylindrical body with a top end suitable for receiving a valved cap, and a bottom end suitable for receiving a bottom wall, defining a reservoir;
- and,
- a piston positioned within the reservoir, dividing the reservoir into an upper product containing chamber, and a lower propellant containing chamber, wherein the piston comprises a body and at least one fin circumferentially positioned around the body, wherein when the fins are in a first unactivated position, they do not radially extend to the hollow cylindrical body, and when the fins are in a second activated position, they radially extend to and contact the hollow cylindrical body.
A container comprising:
- a hollow cylindrical body with a top end and a bottom end, defining a reservoir, a bottom wall sealing the bottom end, and a valved cap sealing the top end;
- and,
- a piston positioned within the reservoir, dividing the reservoir into an upper product containing chamber, and a lower propellant containing chamber, wherein the piston comprises a body and at least two fins circumferentially positioned around the body, wherein when the fins are in a first unactivated position, they do not radially extend to the hollow cylindrical body, and when the fins are in a second activated position, they radially extend to and contact the hollow cylindrical body.
Dependencies are inferred from the claim text.