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US 5,960,825 AGranted
Laser hardened reed valve
AssigneeCopeland Corporation
InventorsMarc Joseph Scancarello, William Christian Gates, Brad Anthony Schulze
Life of this patent
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Abstract
A valve assembly has a discharge valve member and a suction valve member. One of these valve members includes a reed valve. The reed valve has a tab which includes a localized through hardened area which provides a wear surface. The remainder to the reed valve has a lower hardness to provide fatigue strength to the reed valve.
Claims17
A pressure responsive valve assembly for a compression chamber, said valve assembly comprising:
- a valve plate having an inner surface defining a discharge chamber and a suction chamber;
- a pressure responsive discharge valve member disposed between said discharge chamber and said compression chamber;
- and
- a single piece responsive suction valve member disposed between said suction chamber and said compression chamber, said suction valve member having a first hardness level and at least one tab which includes a through hardened portion having a second hardness level, said second hardness level being greater than said first hardness level.
1 more element
A single piece reed valve member comprising:
- a body having a first hardness level;
- and
- at least one tab extending from said body, said at least one tab including a through hardened portion having a second hardness level, said second hardness level being greater than said first hardness level, said at least one tab includes a non-through hardened portion.
Dependencies are inferred from the claim text.