Cutlery – Cutting tools – Saw
Patent
1976-09-16
1977-10-18
Jones, Jr., James L.
Cutlery
Cutting tools
Saw
64 29, 192 56R, 192 89B, B23D 5702, F16D 2300
Patent
active
040539806
ABSTRACT:
Disclosed herein is a chain saw including a drive shaft, a chain sprocket and a clutch including a drive member driven by the drive shaft and a driven member for rotating the chain sprocket in response to rotation of the drive shaft. One of the members is axially movable relative to the other between an engaged or driving position and a released position wherein they are disengaged from each other. The drive and driven members have intermeshing clutch teeth which coact to produce an axial force in a direction tending to separate the axially movable one of the members from the other. The members are releasably held in the driving position by a resilient element which is movable between a first position wherein it yieldably resists axial displacement of the axially movable one of the members and a second position which is spaced from the first position so as to permit movement of the axially movable one of the members to the released position. The resilient element is moved from the first position to the second position when the axially directed separating force exceeds a predetermined level and remains in the second position in absence of a reset force being applied thereto in an axial direction opposite to the separating force.
REFERENCES:
patent: 3144890 (1964-08-01), Irgens
patent: 3339596 (1967-09-01), Deelman
patent: 3499512 (1970-03-01), Maurice
patent: 3519037 (1970-07-01), Linkfield
patent: 3596446 (1971-08-01), Bryan
patent: 3967711 (1976-07-01), Stroezel et al.
Jones Jr. James L.
Outboard Marine Corporation
Smith James G.
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