Pressure relief valve for a grease gun

Details Pressure relief valve for a grease gun Pressure relief valve for a grease gun

1976-12-13

1977-12-13

Brown, David H.

Lubrication

Lubricators

Nipple or fitting

222397, 251340, F16N 312

Patent

active

040624250

ABSTRACT:
A flow control handle for supplying lubricant to a grease fitting. The handle includes a flow control valve interiorly thereof, a handle extension and a manual trigger for controlling the flow control valve. A pressure relief valve is operable to relieve high pressure grease in the handle extension. This valve is an internally seating pin valve disposed in the wall of the handle extension which is spring biased to a closed position. The valve is opened by movement of the trigger into engagement with the valve stem to compress the spring. Movement of the trigger is in a direction opposite to that required to open the flow control valve whereby high pressure grease cannot enter the extension when the relief valve is open.

REFERENCES:
patent: 2615598 (1952-10-01), Watkins et al.
patent: 3788427 (1974-01-01), Fox et al.

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