Integral dust cover and pump drive

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

B - Operations, Transporting

27

B

143/5

B27B 17/12 (2006.01) B27B 17/08 (2006.01) F16D 1/06 (2006.01) F16N 13/00 (2006.01)

Patent

CA 2005956

ABSTRACT OF THE DISCLOSURE 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.

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