Fluid handling – Line condition change responsive valves – With separate connected fluid reactor surface
Patent
1999-03-23
2000-12-05
Hepperle, Stephen
Fluid handling
Line condition change responsive valves
With separate connected fluid reactor surface
13750542, G05D 1602
Patent
active
061552909
ABSTRACT:
A gas pressure-reducing valve in which a valve member to be seated on a valve seat opened at its central portion with a valve hole leading to a pressure-reducing chamber between a body and a diaphragm is fixed on a valve stem coaxially extending through the valve hole, and in which the valve stem is fastened to a fastened member fixed on the central portion of the diaphragm. The fastened member is provided with a fitting bore opened at its one end on the side of the valve stem and a bottom threaded bore having a diameter smaller than that of the fitting bore and coaxially leading to the other end of the fitting bore. The valve stem is provided at its end portion on the side of the diaphragm with a fitting stem portion to be fitted in the fitting bore and an externally threaded portion capable of being screwed in the threaded bore and coaxially leading to the fitting stem portion. The externally threaded portion has a shorter axial length than that of the fitting bore. This arrangement makes it possible to confine the chips, as produced by screwing the valve stem into the fastened member, within the fastened member thereby to eliminate the chip removing work and to improve the assembling efficiency.
REFERENCES:
patent: 1701185 (1929-02-01), Heideman
patent: 3195568 (1965-07-01), Pearl
patent: 3240223 (1966-03-01), Horst
patent: 3857407 (1974-12-01), Olson
patent: 4257450 (1981-03-01), Ollivier
patent: 5711340 (1998-01-01), Gusky et al.
Ishikawa Kazuki
Iwasaki Hiroyuki
Nakajima Yoji
Saito Yoshio
Hepperle Stephen
Keihin Corporation
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