Fluid handling – Line condition change responsive valves – With separate connected fluid reactor surface
Patent
1984-03-09
1985-10-29
Nilson, Robert G.
Fluid handling
Line condition change responsive valves
With separate connected fluid reactor surface
137510, 251 83, 251100, F16K 1704
Patent
active
045495734
ABSTRACT:
A spray valve assembly adapted to be removably, threadably secured to spray boom manifolds or the like for subsequent spraying of insecticides or other agri-chemicals. Preferably the spray valve assembly includes a rigid valve body adapted to be threadably secured to a suitable spray boom or manifold; and a cooperating valve head which is threadably secured to the valve body. A generally tubular fluid admittance passageway coaxially, sealably defined within the valve body extends partially into the valve assembly, and terminates in the assembly spray output. A plunger associated with the valve head includes a ram portion which contacts an internal gasket to selectively block the admittance input to prevent escape of agrichemicals. The plunger means also includes an elongated stem coaxially received through the valve head which is fitted with a transverse pin which normally tracks within a suitable follower slot defined in the head. The slot includes both horizontal and vertical portions, and when the pin is disposed within the horizontal follower portion input pressure to the spray valve assembly against yieldable bias from the plunger will admit fluid into the admittance passageway thus bypassing the gasket for expulsion through the assembly outlet. The plunger may be locked in either a totally open position, a totally closed position, or an operative position wherein the stem is free to move axially relative to the assembly in response to fluid input pressure.
REFERENCES:
patent: 1198956 (1916-09-01), Richardson
patent: 1493774 (1924-05-01), Dorsey
patent: 2043798 (1936-06-01), Hyatt
patent: 2639194 (1953-05-01), Wahlin
Carver Stephen D.
Nilson Robert G.
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