Grease fitting

Details Grease fitting Grease fitting

1980-02-25

1982-09-07

Brown, David H.

Lubrication

Lubricators

Nipple or fitting

137539, F16N 502

Patent

active

043479154

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.

REFERENCES:
patent: 1942313 (1934-01-01), Viele et al.
patent: 2400817 (1946-05-01), Fox et al.
patent: 2761468 (1956-09-01), Thatcher
patent: 2878896 (1959-03-01), Farrell
patent: 2918084 (1959-12-01), Madar et al.
patent: 3437082 (1969-04-01), Bouwkamp et al.
patent: 3791406 (1974-02-01), Phillips

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