(19)
(11)EP 0 887 551 A3

(12)EUROPEAN PATENT APPLICATION

(88)Date of publication A3:
23.05.2001 Bulletin 2001/21

(43)Date of publication A2:
30.12.1998 Bulletin 1998/53

(21)Application number: 98303657.5

(22)Date of filing:  11.05.1998
(51)International Patent Classification (IPC)7F04B 39/10, C21D 1/09
(84)Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30)Priority: 26.06.1997 US 883008

(71)Applicant: Copeland Corporation
Sidney, Ohio 45365-0669 (US)

(72)Inventors:
  • Scancarello, Marc Joseph
    Troy, Ohio (US)
  • Gates, William Christian
    West Milton, Ohio 45383 (US)
  • Schulze, Brad Anthony
    Troy, Ohio 45373 (US)

(74)Representative: Price, Nigel John King 
J.A. KEMP & CO. 14 South Square Gray's Inn
London WC1R 5LX
London WC1R 5LX (GB)

  


(54)Laser hardened reed valve


(57) 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.







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