Very low flow rate lubricant metering apparatus and method for a

Details Very low flow rate lubricant metering apparatus and method for a Very low flow rate lubricant metering apparatus and method for a

1980-07-07

1982-08-24

Brown, David H.

Lubrication

Lubricators

Force feed

91 46, 184 7E, 408 59, F16N 1316

Patent

active

043456685

ABSTRACT:
A precision, very low flow rate, lubricant metering apparatus and method for metering lubricant to a tool and workpiece while various machining operations are performed by the tool on the workpiece. The apparatus has a pneumatic air logic unit which delivers a stream of air pulses to a pneumatically driven positive displacement, precision lubricant injector pump at a selectively variable rate. In response to each air pulse delivered to it, the injector pump delivers a selectively variable amount of lubricant to a lubricant delivery line by which the lubricant can be conveyed to the tool and workpiece. When the apparatus is used with a machine tool powered by an air driven motor, an air flow sensing valve is provided which automatically delivers compressed air to the air logic unit only when the air driven motor is consuming compressed air. Since in many uses of the apparatus both lubricant and compressed air are needed at the tool and workpiece, special housings are provided which enable the delivery of lubricant from the injector pump to a line located within a compressed air delivery line. Air flow control valves may be provided which regulate the delivery of compressed air to the air logic unit and the compressed air delivery line.

REFERENCES:
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patent: 3130818 (1964-04-01), Smith et al.
patent: 3487892 (1970-01-01), Kiefer
patent: 3547350 (1970-12-01), Marcoux
patent: 3604534 (1971-09-01), Whitaker
patent: 3693757 (1972-09-01), Callahan et al.
patent: 3926279 (1975-12-01), Thrasher
patent: 4105095 (1978-08-01), Thrasher

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