Valves and valve actuation – Rotary valves – Butterfly
Patent
1975-01-31
1977-02-08
Cline, William R.
Valves and valve actuation
Rotary valves
Butterfly
251308, 137269, 277189, 277199, F16K 118
Patent
active
040068820
ABSTRACT:
A butterfly valve of large diameter which comprises a body with a substantially cylindrical inner bore, internally lined with a ring that terminates at lateral flanks of the valve; a butterfly pivotally mounted in the body by means of valve spindles that pass through the body and the ring; wherein the body includes at least two annular grooves that are coaxial with respect to the bore; the ring being constructed with several aligned sections, such as two curvilinear sections and a plurality of rectilinear sections; wherein the ends of the sections are formed and vulcanized to shape after having been aligned; the ring further including, on its side adjacent the body, at least two annular tenons with heads that respectively engage the grooves, these tenons being smaller than the groove inlets; an empty space being provided between the tenons and the grooves, filled at the time of assembly with a plastic material that hardens by polymerization, for example an epoxy resin. Optionally, the body may have passages therein for the valve spindles, the ring may further include a flange, and screws may be provided at the ends of the passages for regulating the axial compression of the flange about the valve spindles.
REFERENCES:
patent: 2768036 (1956-10-01), Greenough
patent: 2936153 (1960-05-01), Gaffin
patent: 3024802 (1962-03-01), Stillwagon
patent: 3095619 (1963-07-01), Peterson
patent: 3143132 (1964-08-01), Pangburn
patent: 3311128 (1967-03-01), Taylor
patent: 3544066 (1970-12-01), Fawkes
patent: 3840042 (1974-10-01), Brundage
Applications Mecaniques et Robinetterie Industrielle (A.M.R.I.)
Cline William R.
Spiegel H. Jay
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