Control arrangement

Claim 2

A control arrangement for a power supply system employing a variable displacement hydraulic pump including a rotatively actuated displacement varying mechanism, an electric motor energizable for driving said pump, electrical circuit means interconnecting said electric motor and an associated source of electrical potential, and electrical switching means for opening and closing said circuit means, said control arrangement comprising: first means for rotating said displacement varying mechanism, and said first means being adjustably rotationally positionable to a fixed mechanical relationship with said displacement varying mechanism, second means rotatably mounted on said rotating means for manually actuating said Electrical switching means to said open and closed positions, third means for urging said rotating means and said actuating means to positions wherein said pump displacement varying mechanism is at a position of minimum displacement and said electrical circuit is open, and fourth means for effecting operation of said rotating means to vary said pump displacement from said minimum displacement after said actuating means has been rotated to a position causing said switching means to close said electrical circuit.

Claim 3

A control arrangement according to claim 1 wherein said first means comprises a rotatable shaft, and wherein said second means comprises a control lever journalled on said shaft for rotation relative thereto.

Claim 4

A control arrangement according to claim 1 wherein said first means comprises a rotatable shaft, wherein said second means comprises a control lever journalled on said shaft for rotation relative thereto, and wherein said third means comprises spring means operatively engaging said shaft and said control lever.

Claim 5

A control arrangement according to claim 1 wherein said operation effecting means comprises connecting means operatively interconnecting said rotating means and said actuating means and including lost motion means.

Claim 6

A control arrangement according to claim 4 wherein said first means comprises a rotatable shaft, wherein said second means comprises rotatable control lever means, wherein said lost motion means comprises first abutment means operatively carried by said rotatable shaft and second abutment means operatively carried by said control lever means, and wherein said third means comprises resilient means, said resilient means being effective to maintain said first and second abutment means spaced from each other when said control lever means and said shaft are in said neutral position.

Claim 7

A control arrangement according to claim 5 wherein said control lever means is rotatably journalled on said shaft.

Claim 8

A control arrangement according to claim 5 wherein said third means further comprises a first fixed reference member, a second member moveable with respect to said first member and fixedly carried by said shaft for rotation therewith, and wherein said resilient means is effective for operatively engaging said first and second members as to continually urge said first and second members toward a predetermined respective relationship corresponding to said neutral position.

Claim 9

A control arrangement according to claim 1 and further comprising time delay means for preventing the normal opening of said electrical circuit means until after said second means has remained in said neutral position for a predetermined period of time.

Claim 10

A control arrangement according to claim 4 wherein said first means comprises a rotatable shaft, wherein said second means comprises a control lever generally freely journalled on said shaft, and further comprising an arm member fixedly carried by said shaft for rotation therewith, a first fixed abutment portion, a second abutment portion carried by said arm member for movement therewith, a third abutment portion carried by said arm member for movement therewith, wherein said lost motion means comprises a fourth abutment portion carried by said control lever for movement therewith and spaced fifth and sixth abutment portions carried by said arm member for movement therewith, and wherein said third means comprises first and second spring means, said first spring means being effective to operatively engage said first and second abutment portions to thereby continually urge said arm member and said shaft toward said neutral position, and said second spring means being effective to operatively engage said third and fourth abutment portions to thereby continually urge said control lever in a direction whereby said fourth abutment means assumes a position generally between and spaced from said spaced fifth and sixth abutment portions.

Claim 11

A control arrangEment according to claim 9 wherein said fifth and sixth abutment portions comprise a portion of a slot freely receiving said fourth abutment portion therein.

Claim 12

A control arrangement according to claim 9 wherein each of said first and second spring means comprises a torsion spring having opposed spring arms, and wherein said first second third and fourth abutment portions are abutably engaged by said opposed spring arms.

Claim 13

A control mechanism comprising a shaft mounted for rotational movement, first means for yieldably retaining said shaft in an initial position, a member mounted for rotational movement relative to said shaft, second means yieldably retaining said member in an initial position relative to said shaft, and third means for rotating said shaft from its said initial position in response to rotation of said member beyond a predetermined degree of rotation from the said initial position of said member.

Claim 14

A control mechanism comprising a shaft mounted for rotational movement, first means for yieldably retaining said shaft in an initial position, a member mounted for rotational movement relative to said shaft, second means yieldably retaining said member in an initial position relative to said shaft, and third means for rotating said shaft from its said initial position in response to rotation of said member beyond a predetermined degree of rotation from the said initial position of said member.