Grease fitting
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United States of America Patent
Stats
-
Sep 7, 1982
Grant Date -
N/A
app pub date -
Feb 25, 1980
filing date -
Feb 25, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An improved grease fitting is provided particularly suitable in high pressure applications where a polyester plasticizer is intermingled with a lubricant. In one embodiment of the invention, a metal ball is biased by a cylindrical helical spring for sealing engagement with a plastic seat. A leg of the spring passes through the axis of the fitting, so that when grease is forced through the fitting, the unseated ball moves rapidly to allow the plasticizer and lubricant to pass through the fitting with less resistance. The helical spring is enclosed in a sleeve, and a stop on the sleeve enables the end of the sleeve to compress the plastic seat to a predetermined extent, thus prolonging the expected life of the plastic seat.
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