Motors: expansible chamber type – Constantly applied motive fluid with controlled venting
Patent
1979-08-02
1981-08-18
Maslousky, Paul E.
Motors: expansible chamber type
Constantly applied motive fluid with controlled venting
91 51, 91396, F15B 1522, F01B 1304
Patent
active
042839904
ABSTRACT:
Two fluid passages are connected through flow restrictors to a fluid supply. Downstream of the restrictors the fluid supply has a drooping pressure-load characteristic. Venting means for the fluid passages comprises vent openings therein downstream of the restrictors and variable position obstructor means cooperating with vent openings to vary venting and thereby vary fluid pressures in the fluid passages.
Fluid conduits connect these pressure outputs to a fluid to mechanical translator comprising a double acting piston moving in a cylinder whose opposite ends are connected to the fluid conduits.
A receiver is formed by a piston and cylinder or other fluidic motor remotely fluidically connected to the responder, the motor driving a load. Alternatively the remote motor may be omitted, the responder itself constituting a receiver and its piston connected, mechanically or fluidically, to an output display or load for indication or proportional control.
A feedback means controlled by the position of the responder piston and/or the load varies pressure in the fluid conduits by variably venting same. The degree of feedback venting is a function of piston movement. The venting path of the feedback means is in parallel with the venting path of the transmitter.
Instead of variable venting, variable pressures can be generated by making the restrictors variable and conducting downstream pressure by two lines to the responder. Furthermore, the transmitter may be modified to effect change in only one pressure. A single line may then be used between transmitter and responder.
Both rotary and linear types of transmitters and load feedback means and receivers may be used.
REFERENCES:
patent: 2973746 (1961-03-01), Jupa
patent: 2989950 (1961-06-01), Lockman
patent: 3083695 (1963-04-01), Stiglic
patent: 3486416 (1969-12-01), Eastman
Conley Ned L.
Maslousky Paul E.
Robinson Murray
Rose David Alan
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