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Description: |
| Abstract:
This invention relates to those devices which employ a spring-actuated piston for the purpose of insuring a forced feed of grease or other dense lubricant from a cup, cylinder, or similar reservoir; and the first part of my improvements consists in making the rod of such pistons tubular, and fitting therein a plug or stem whose inner end acts as a cutoff that regulates or entirely stops the flow of grease, as occasion may require. The second part of my improvements consists in providing a lubricator with a pair of clutch-nuts, which are capable of engagement when it is desired to retract and lock the spring-piston preparatory to filling the cup or cylinder.
Claim:
The combination, in a grease-cup, of a spring-actuated piston for ejecting the lubricant and a cutoff for regulating the escape of the same, said cutoff being located within the tubular rod that carries said piston. |
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