Metal working – Method of mechanical manufacture – Valve or choke making
Patent
1998-04-28
2000-05-16
Cuda, Irene
Metal working
Method of mechanical manufacture
Valve or choke making
29890126, 29517, B21H 100
Patent
active
060619066
ABSTRACT:
A process for manufacturing a spool valve whereby a plurality of quenching processed collars are fitted to a shaft material so that the collars are arranged at predetermined positions on the shaft material. The collars have respective substantially central holes through which the shaft material extends. The diameter of portions of the shaft material is contracted in a vicinity of both opposite ends of each of the collars by rolling dies so as to cause plastic flow of a metal constituting the shaft material. Pairs of circular convex portions are then formed on outer circumferential faces of the diameter contracted portions of the shaft material. The circular convex portions each have an outer diameter larger than an inner diameter of the substantially central holes of the collars, and the circular convex portions are formed such that side faces thereof are in close contact with respective associated circular concave portions formed at both ends of the collars in a vicinity of the substantially central holes of the collars, whereby the collars are fixed to the shaft material.
REFERENCES:
patent: 139463 (1873-06-01), Gibbs
patent: 240286 (1881-04-01), Trethewey
patent: 430484 (1890-06-01), Richards
patent: 435322 (1890-08-01), Richards
patent: 2985566 (1961-05-01), Tsien et al.
patent: 3095011 (1963-06-01), Banker
patent: 3103739 (1963-09-01), Moog
patent: 3163175 (1964-12-01), Pearson
patent: 3307586 (1967-03-01), Meyer
patent: 3608171 (1971-09-01), Stradtmann
patent: 3635249 (1972-01-01), Kirkman
patent: 3756280 (1973-09-01), Parquet
patent: 3792603 (1974-02-01), Orian
patent: 4190073 (1980-02-01), Claycomb
patent: 4575913 (1986-03-01), Sugiuchi
patent: 4880260 (1989-11-01), Gotoh et al.
patent: 4922785 (1990-05-01), Arnold et al.
patent: 5041253 (1991-08-01), Husted
patent: 5072885 (1991-12-01), Hans
patent: 5080406 (1992-01-01), Hyatt et al.
patent: 5201171 (1993-04-01), Anderton et al.
patent: 5314204 (1994-05-01), Durocher et al.
patent: 5405176 (1995-04-01), Babel et al.
patent: 5421367 (1995-06-01), Murata
Patent Abstracts of Japan, vol. 95, No. 8, Sep. 29, 1995 & JP 07 119845 A (Rhythm Corp.), May 12, 1995.
Patent Abstracts of Japan, vol. 14, No. 364, (M-1007), Aug. 7, 1990 and JP 02 129477 A (Aisin AW Co., Ltd.), May, 1990.
Kato Keigo
Mizuno Masataka
Aoyama Seisakusho Co., Ltd.
Cuda Irene
Nguyen Trinh T.
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