Carburetor and oil pump assembly and method of making the same

Details Carburetor and oil pump assembly and method of making the same Carburetor and oil pump assembly and method of making the same

1989-08-22

1990-05-29

Watts, Douglas D.

Cutlery

Combined cutlery or combined with ancillary feature

With means to apply transient fluid to tool

30381, 123 73AD, B23D 5904, B27B 1702, F02B 3304

Patent

active

049283901

ABSTRACT:
A carburetor and chain oiling assembly and method of manufacturing the same for use in a chain saw. The assembly generally comprises a carburetor section, an oil pump section and a cover connecting the two sections. The cover can connect the oil pump section to the carburetor section forming a cover for a carburetor fuel diaphragm and a working chamber with an oil pump diaphragm. The cover has a gas conduit between the carburetor housing and the working chamber such that gas pulses from an engine crankcase can be supplied to the working chamber to operably move the oil pump diaphragm to provide a continuous and automatic metered flow of oil to a saw chain.

REFERENCES:
patent: 2605787 (1952-08-01), Kiekhaefer
patent: 2944538 (1960-07-01), Conway et al.
patent: 3010538 (1961-11-01), Strunk
patent: 3332411 (1967-07-01), Bloom et al.
patent: 3809185 (1974-05-01), Kobayashi et al.
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patent: 4644658 (1987-02-01), Dolata et al.
patent: 4770130 (1988-09-01), Nagashima
patent: 4802555 (1989-02-01), Matsunaga et al.
patent: 4819332 (1989-04-01), Sugihara et al.
patent: 4835866 (1989-06-01), Nagashima

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