| 摘要 |
1,171,334. Fluid-pressure servomotor systems. C.A. NORGREN CO. Jan. 18, 1967 [Nov. 25, 1966], No.2652/67. Heading G3P. [Also in Division F2] A control device, for maintaining constant the level of lubricant in a lubricator in a compressed air power system, comprises a float 58, movable with the liquid level, and a control chamber 56 operable by the float. Upon the liquid level falling, the float end cap 94 rests on housing 86 and so, by means of stem 96, raises ball 92 from its seating on port 90. Fluid under pressure, supplied to port 100, passes through channels 112, 136, 74, 91, and 88 into a container 26 of the lubricator. As the float rises so ball 92 becomes seated at 90, and fluid-pressure, supplied to inlet 100, enters chamber 80, via passages 76, and moves diaphragm 68 downwardly, a conduit 132, forming passage 136, and fixed to the diaphragm, thereby also moving downwardly to be seated at 124 to cut off the supply. The diaphragm is biased away from seat 124 by a spring 138 and by pressure within container 26 applied through port 82. The device functions with continuous or intermittent supply to port 100 and does not suffer from reverse flow on account of ball 92 which can be seated on port 74. In an alternative embodiment, Fig. 4 (not shown), the end of conduit 132 and the seat 124 are surrounded by a porous plug (178) which, like the channels 112, acts to meter the inlet flow. |
