Fluid handling – Line condition change responsive valves – Direct response valves
Patent
1993-11-23
1995-05-02
Nilson, Robert G.
Fluid handling
Line condition change responsive valves
Direct response valves
137528, F16K 1502
Patent
active
054110556
ABSTRACT:
A flow limiting throttle element for restricting the flow of a fluid guided in a delivery line, including a pressure-tight housing having a first bore hole portion, a second bore hole portion adjoining the first bore hole portion and two coaxially arranged working connections. A substantially cylindrical piston is arranged in the first bore hole portion of the housing so as to be freely axially displaceable therein, the first bore hole portion having a length that is at least 50% of the piston length. Overflow ducts are arranged in an outer surface area of the piston and the second bore hole portion of the housing has a cylindrical recess which communicates with the overflow ducts and transits into a first one of the working connections. The first working connection having an inner diameter smaller than that of the second bore hole portion. Additionally, a connection nipple is sealingly arranged in the first working connection, and has an annular end face which is situated in the housing so as to project into a region of the cylindrical recess and form a sealing fit with a first end face of the piston which faces the nipple end face. A first continuous slot is arranged on the first end face of the piston so as to continuously communicate with the cylindrical recess of the second bore hole portion without regard to the axial position of the piston.
REFERENCES:
patent: 2742057 (1956-04-01), Krieck
patent: 2748797 (1956-06-01), Heizer
patent: 3595265 (1971-07-01), Cryder
patent: 3788352 (1974-01-01), Ane
Mannesmann Aktiengesellschaft
Nilson Robert G.
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