Integral dust cover and pump drive

Details Integral dust cover and pump drive Integral dust cover and pump drive

1989-05-30

1990-01-16

Yost, Frank T.

Cutlery

Combined cutlery or combined with ancillary feature

With means to apply transient fluid to tool

30383, F16N 1314

Patent

active

048934070

ABSTRACT:
A chain saw having an outboard mounted centrifugal clutch adapted to drive an automatic lubricating pump. A cavity is formed in the portion of the housing from which the drive shaft protrudes. A worm gear for activating the lubrication pump is mounted in the cavity. A combination seal and worm gear drive member is slidably fit with the adapter of the clutch cup with a worm gear driver portion engaged with the worm gear. A disc shaped seal portion includes a lip that fits into a groove surrounding the cavity, held in place through engagement of the worm gear driver with the worm gear.

REFERENCES:
patent: 2741276 (1956-04-01), Warren
patent: 3044506 (1962-07-01), Oehrli
patent: 3938622 (1976-02-01), Densow
patent: 3970178 (1976-07-01), Densow
patent: 3994067 (1976-11-01), Hazzard et al.
patent: 4353163 (1982-10-01), Overbury et al.
patent: 4644658 (1987-02-01), Dolata et al.
patent: 4683659 (1987-08-01), Wunsch et al.
patent: 4756396 (1988-07-01), Nagashima et al.
patent: 4764093 (1988-08-01), Nagashima
patent: 4819332 (1989-04-01), Sugihara et al.
patent: 4847999 (1989-07-01), Nagashima

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