Valve construction

Details Valve construction Valve construction

1975-08-04

1977-11-08

Cline, William R.

Valves and valve actuation

Rotary valves

Butterfly

251368, F16K 122

Patent

active

040572170

ABSTRACT:
A butterfly valve includes a housing, a pivotal stem mounted on housing, and a disk mounted on the stem and tiltable within the housing to control the flow rate of a fluid. Means for attaching the stem to the disk includes a keyway defined by one of the stem and the disk, and an associated pin carried by the other of the stem and the disk. The keyway includes a ramp inclined with respect to the stem at a particular angle, and portions of the pin slide on the ramp in response to temperature change of the fluid to accommodate radial and axial displacement of the disk with respect to the stem. The particular angle of the ramp can be made dependent upon the diameter of the stem and the distance between a fixed point along the stem and the ramp pin. With this particular angle, the pin will slide on the ramp radially and axially of the stem while maintaining a fixed angular relationship between the stem and the disk.

REFERENCES:
patent: 2308183 (1943-01-01), Lewis et al.
patent: 2847181 (1958-08-01), Muller
patent: 2919885 (1960-01-01), Daigle
patent: 3312242 (1967-04-01), Kahn et al.
patent: 3314642 (1967-04-01), Kautz et al.
patent: 3384340 (1968-05-01), Fawkes
patent: 3517689 (1970-06-01), Roos
patent: 3591133 (1971-07-01), Miles
patent: 3627259 (1971-12-01), Williams

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