초록 ▼

A rotary power mower in which the cutter blade is fixed to the bottom of a cup-shaped rotor, freely rotatably suspended from a carriage that is slidably mounted for fore and aft movement beneath the deck of the mower chassis. The carriage is spring-urged to a position in which the outer face of the

A rotary power mower in which the cutter blade is fixed to the bottom of a cup-shaped rotor, freely rotatably suspended from a carriage that is slidably mounted for fore and aft movement beneath the deck of the mower chassis. The carriage is spring-urged to a position in which the outer face of the side wall of the cup-shaped rotor is frictionally engaged with a brake shoe fixedly carried by the mower chassis, to hold the cutter blade against turning; and a deadman control mounted on the handle of the mower and operatively connected with the carriage enables the operator to move the carriage against the force of the spring to a position in which the inner face of the side wall of the cup-shaped rotor is tangent to and frictionally engaged with the periphery of a drive wheel fixed to the engine drive shaft.

대표청구항 ▼

In a rotary power lawn mower having a wheeled chassis with a deck, a prime mover mounted on the deck with a drive shaft thereof projecting downwardly into the space below the deck, and a rotary cutter blade below the deck, improved clutch mechanism for drivingly connecting the cutter blade with said

In a rotary power lawn mower having a wheeled chassis with a deck, a prime mover mounted on the deck with a drive shaft thereof projecting downwardly into the space below the deck, and a rotary cutter blade below the deck, improved clutch mechanism for drivingly connecting the cutter blade with said drive shaft, comprising: A. a drive wheel drivingly connected with and driven by said drive shaft, said drive wheel being located below the deck of the chassis and constrained to rotate about a substantially vertical axis that is fixed with respect to the chassis; B. a ring fixed with respect to the cutter blade, said ring having internal and external circular surfaces, the diameter of each of which is larger than that of the drive wheel; C. a carriage; D. means movably mounting said carriage on the chassis and constraining the same to bodily movement in opposite directions along a defined path transverse to the axis of the drive wheel; E. bearing means freely rotatably mounting the ring on said carriage with the ring encircling the drive wheel and its axis parallel to that of the drive wheel, so that upon bodily movement of the carriage in one direction the internal circular surface of the ring is tangentially and frictionally engaged with the periphery of the drive wheel to establish a torque transmitting connection between the prime mover and the cutter blade; and F. manually operable means for effecting bodily movement of the carriage in said direction.