Chain saw oil pump with overload protection
AssigneeOutboard Marine Corporation
InventorUlrich O. Densow
Life of this patent
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Abstract
Disclosed herein is a chain saw oil pump comprising an engine supported by a suitable frame, a pumping chamber defined by the frame and including an inlet and an outlet, a pumping member reciprocal and rotatable in said pumping chamber relative to the inlet and to the outlet so as to effect pumping operation incident to such reciprocation and rotation, and a spring biased gear for yieldably drivingly connecting the pumping member to the engine for rotation of the former in response to operation of the latter.
Claims13
A chain saw comprising a frame, an engine supported by said frame, wall means on said frame defining a pumping chamber including an inlet port and an outlet port, a pumping member rotatable in said pumping chamber relative to said inlet and outlet ports so as to effect pumping operation incident to such rotation, a shaft rotatably supported by said frame and driven by said engine and including thereon a first gear, a second gear meshed with said first gear for rotation thereof in response to first gear rotation and carried for rotary and axial movement relative to said pumping member, a projection radially extending from said pumping member, a notch formed on said second gear and adapted to releasably receive said projection so as to effect rotary driving of said pumping member by said second gear in response to engagement of said projection in said notch, and means in addition to said second gear and said projection yieldably biasing one of said second gear and said projection toward the other.
An oil pump comprising a frame, wall means on said frame defining a pumping chamber including an inlet port and an outlet port, a pumping member rotatable in said pumping chamber relative to said inlet and outlet ports so as to effect pumping operation incident to such rotation, a drive shaft supported by said frame for rotation and having fixed thereon a first gear, a second gear meshed with said first gear for rotation thereof in response to first gear rotation and carried for rotary and axial movement relative to said pumping member, a projection radially extending from said pumping member, a notch formed on said second gear and adapted to releasably receive said projection so as to effect rotary driving of said pumping member by said second gear in response to engagement of said projection in said notch, and means in addition to said second gear and said projection yieldably biasing one of said second gear and said projection toward the other.
An oil pump comprising a frame, wall means on said frame defining a pumping chamber including an inlet port and an outlet port, a pumping member rotatable in said pumping chamber relative to said inlet and outlet ports so as to effect pumping operation incident to such rotation, a drive shaft supported by said frame for rotation and having fixed thereon a first gear, a second gear meshed with said first gear for rotation thereof in response to first gear rotation, said second gear being carried for rotary and axial movement relative to said pumping member, parts on said pumping member and on said gear located for releasable direct interengagement to effect driving rotation of said pumping member by said second gear, and means separate from said interengaging parts for yieldably biasing one of said second gear and said pumping member toward the other to releasably interengage said parts.
Dependencies are inferred from the claim text.