Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1991-03-14
1992-02-18
Stephan, Steven L.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 37, 200 1V, H02K 714, H01H 926
Patent
active
050897292
ABSTRACT:
A portable, reversibly driven power tool (11) comprises a reversible motor and an assembly (17) for electrically switching the direction of motor rotation and/or for shifting the commutator brushes (99, 101) for optimizing motor performance in both the forward and reverse directions. Assembly (17) includes a reversing switch (56) and an actuator (19) which is movable between forward and reverse positions for reversing the connections of the reversing switch (56) to reverse the direction of motor rotation. Actuator (19) includes (a) a sleeve (81) connected to the reversing (56) switch and surrounding the motor stator (43) to guide movement of the actuator (19) between the forward and reverse positions and (b) a manual control tab (85) ergonomically located in the motor housing (23) slightly forward of a manual power switch (21) in the tool handle (35). The commutator brushes (99, 101) and the rotatable contacts (61, 63) for the reversing switch (56) are preferably supported on a common support (67 ) and are movable thereon responsive to the movement of the actuator (19) between the forward and reverse positions. Assembly (17) provides a strong, compact construction for electrically switching the direction of motor rotation and/or shifting of commutator brushes (99, 101), an ergonomically preferred remote manual actuator tab (85), easy assembly and a reliable construction.
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Black & Decker Inc.
Dearing Dennis A.
Del Ponti John D.
Nguyen Matthew
Stephan Steven L.
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