Valves and valve actuation – Reciprocating valve – Piston
Reexamination Certificate
2006-02-14
2006-02-14
Jacyna, J. Casimer (Department: 3751)
Valves and valve actuation
Reciprocating valve
Piston
C251S063000, C251S063500, C141S146000
Reexamination Certificate
active
06997439
ABSTRACT:
The present invention provides a filling valve which affords an excellent sterilization capability and a high maintenance capability. The valve includes a tubular nozzle4, an operating rod6which is fitted in the nozzle4so as to be elevatable, and an opening/closing valve22formed by a valve seat10aon the internal surface of the nozzle4at its bottom end and a valve element6aformed at the bottom end of the operating rod6. A portion10cof a reducing diameter which gradually reduces the cross-sectional area of the filled liquid passage10in a downward direction and a portion10eof an increasing diameter which gradually increases the cross-sectional area of the filled liquid passage10in the downward direction are formed on the internal surface of the nozzle4at an upper portion thereof. A plurality of straightening vanes36are formed on the internal surface of the nozzle4at a location below the portion10eof an increasing diameter.
REFERENCES:
patent: 1373599 (1921-04-01), Clark
patent: 1540962 (1925-06-01), Stuart
patent: 5954086 (1999-09-01), Ronchi
patent: 09-255095 (1997-09-01), None
Katayama Takao
Kawanami Norimi
Konishi Futoshi
Miyazaki Kazuo
Nishino Yukinobu
Dai Nippon Printing Co. Ltd.
Flynn ,Thiel, Boutell & Tanis, P.C.
Jacyna J. Casimer
Shibuya Kogyo Co. Ltd.
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