Motors: expansible chamber type – Three or more cylinders arranged in parallel radial or... – Cylinders parallel to rotation axis
Patent
1975-10-15
1978-06-13
Maslousky, Paul E.
Motors: expansible chamber type
Three or more cylinders arranged in parallel radial or...
Cylinders parallel to rotation axis
91388, 91461, 60445, F01B 1304, F01B 302, F15B 1316
Patent
active
040942295
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. This forms a mechanical to fluidic translator. Pressures at the translator's outputs are a function of the obstructor's position. This translator forms the transmitter of a servo or remote control or indicator system.
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. The piston and cylinder form the responder of the system, which may be adjacent the mechanical to fluidic translator and form part of the transmitter.
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. The responder may be remote from the transmitter and form part of the receiver. The responder may serve as an amplifier.
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.
Dual systems employing plural transmitters, responders, and or receivers, disposed to operate in parallel or as master and slave may be employed e.g. for four wheel drive. The angle of a swash plate controlling a motor pump unit can be varied by a servo system employing plural load cylinders.
REFERENCES:
patent: 2836154 (1958-05-01), Lantz
patent: 2974639 (1961-03-01), O'Connor et al.
patent: 3415163 (1968-12-01), Inaba et al.
patent: 3561488 (1971-02-01), Byers
Conley Ned L.
Maslousky Paul E.
Robinson Murray
Rose David Alan
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