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US 2013/0276408 A1Published application
Exhaust valve
AssigneePeking University
InventorJiyan Huo
Life of this patent
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Abstract
Various embodiments of exhaust valves are described. In an example, an exhaust valve assembly includes a valve body having a cylinder, a piston disposed within the cylinder, and a sealing material disposed within a trough at the bottom of the cylinder. The selection of the sealing material may be based on an operational temperature that is above a melting point of the sealing material.
Claims16
1-31. (canceled)
A method, comprising:
- placing a raw material in a container comprising an opening;
- removably coupling the opening in the container with an exhaust valve assembly comprising:
- a valve body comprising a cylinder and a trough disposed within the cylinder along a bottom portion of the valve body;
- a piston slideably engaged within the cylinder, wherein at least a portion of the piston is configured to reside within the trough when the piston is in a resting position;
- and
- a piston sealing material disposed within the trough, wherein the piston sealing material has a melting point below a first operational temperature;
- heating the container holding the raw material to generate an exhaust gas, wherein the exhaust gas passes through the opening, elevates the piston, and melts the piston sealing material;
- allowing the container to cool to cease generation of exhaust gas, wherein a decrease in exhaust gas pressure allows the piston to return to the resting position, wherein the piston sealing material solidifies as the container cools, thereby creating a substantially air-tight seal.
5 more elements
46-57. (canceled)
Dependencies are inferred from the claim text.