Motors: expansible chamber type – Plural relatively movable or rigidly interconnected working... – Condition responsive means for modifying working member...
Patent
1985-10-21
1987-11-10
Nilson, Robert G.
Motors: expansible chamber type
Plural relatively movable or rigidly interconnected working...
Condition responsive means for modifying working member...
91443, 91534, 1375133, 137517, F15B 1522
Patent
active
047049472
ABSTRACT:
A valve for regulating the bidirectional flow of hydraulic fluid in an hydraulic fluid line, wherein the flow resistance in one direction can be increased, includes a hollow body (10) with an internal seat (20), a spool member (22) slidably mounted within the body (10), the spool (22) having a cylinder portion (24) and a nozzle portion (26) containing orifices (30, 32, 34), bias means (40), and limit means (42). The spool (22) is slidable within the body (10) between a position in which fluid flows through all orifices (30, 32, 34) to provide unrestricted fluid flow when fluid flows through the valve in one direction, and a position in which the nozzle (26) engages the seat (20) to block fluid flow through some of the orifices (30, 32, 34) and thereby increase flow resistance when fluid flows through the valve in the opposite direction. Bias means (40) acts to bias the spool (22) to the position in which fluid flow is unrestricted, and the limit means (42) limits the movement of the spool (22) within the body (10).
REFERENCES:
patent: 911005 (1909-01-01), Garman
patent: 2179144 (1939-11-01), Buttner
patent: 2450446 (1948-10-01), Rupp
patent: 3367187 (1968-02-01), Smith
patent: 3741241 (1973-06-01), Jackson
patent: 4355565 (1982-10-01), Bianchetta
Nilson Robert G.
Versa Technologies, Inc.
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