Lubrication – Lubricators – Belt – cable – chain or conveyor
Patent
1976-06-21
1978-06-13
Brown, David H.
Lubrication
Lubricators
Belt, cable, chain or conveyor
184 28, 123196CP, 301234, F16N 1308
Patent
active
040943828
ABSTRACT:
A lubricant feed system for use in lubricating the cutting attachments of a chain saw having an internal combustion engine and a lubricant tank. The feed system has a system of passageways permitting flow of lubricant from the tank to the guide bar. A check valve and a manually operable plunger are positioned in the passageway and spaced from each other to define a first chamber. The check valve permits flow from the tank to the bar pad and is openable by pressure in the tank. A metering valve for regulating the flow from the check valve to the bar pad is reciprocable between a closed and an opened position. The reciprocation and thus the position of the valve are controllable by manually operable means extending from the metering valve to the exterior. The metering valve has means to urge it to the closed position. The urging means exerts a force that can be overcome by operation of the plunger. There are means to permit the metering valve to move to a fully open position by the operation of the plunger regardless of the position of the metering valve. Thus operation of the plunger closes the check valve, opens fully the metering valve and forces lubricant contained in the first chamber through the system of passageways to clear any obstruction in said passageways.
REFERENCES:
patent: 2852096 (1958-09-01), Armstrong
patent: 2883000 (1959-04-01), Mattson
patent: 3010538 (1961-11-01), Strunk
patent: 3776369 (1973-12-01), Schrack et al.
patent: 3844380 (1974-10-01), Batson
patent: 3865213 (1975-02-01), McDermott
Brown David H.
Trail Manufacturing Ltd.
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