Corrosion resistance for fire hydrant stem safety coupling

Details Corrosion resistance for fire hydrant stem safety coupling Corrosion resistance for fire hydrant stem safety coupling

1990-05-16

1991-06-04

Kundrat, Andrew V.

Joints and connections

Distinct end coupler

Separate screw or pin-type connections

403 2, 403404, B25G 300

Patent

active

050209345

ABSTRACT:
A corrosion resistant valve stem coupling for use in selected fire hydrants whose water valves are frequently opened and closed. The valve stem coupling is coated with a compressible, non-oxidizable, corrosion protection coating which does not oxidize and is not worn off in situations of repeated use. In one embodiment, the compressible coating is a nylon coating applied to the valve stem coupling with a fluid-bed, powder coating method.

REFERENCES:
patent: 3439947 (1969-04-01), Luckenbill et al.
patent: 4114505 (1978-09-01), Loeser et al.

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