Reversible reduction gear system and brake for marine drive

Claim 2

Reversible reduction gear apparatus for alternatively coupling an input shaft to an output shaft in a forward drive direction and in a reverse drive direction including in combination, an input shaft, an output shaft, an output gear carried by said output shaft for rotation therewith, a forward drive input gear carried by said input shaft for rotation therewith, a first intermediate shaft, a second intermediate shaft, respective intermediate gears carried by said intermediate shafts for rotation therewith, said intermediate gears meshing with said forward drive input gear, respective forward drive output pinions carried by said intermediate shafts for rotation therewith, said output pinions meshing with said output gear, a reverse drive pinion rotatably carried by said input shaft, a forward positive clutch actuatable between an engaged condition at which it couples said forward drive output pinions to said input shaft and a disengaged condition, a reverse positive clutch actuatable between an engaged condition at which it couples said reverse pinion to said input shaft and a disengaged condition, mechanical spring means normally biasing said forward clutch to engaged condition and said reverse clutch to disengaged condition, fluid pressure means for actuating said clutches against the action of said spring means to disengage said forward clutch and to engage said reverse clutch, a brake associated with one of said intermediate shafts, and control means for actuating said brake and for supplying fluid under pressure to said fluid pressure means to place said apparatus in a reverse drive condition.

Claim 3

Apparatus as in claim 1 including a second brake associated with said other intermediate shaft, said control means comprising means for concomitantly actuating said brakes.

Claim 4

Apparatus as in claim 1 in which said control means comprises means for actuating said brake and relieving said fluid pressure to permit said springs to restore said system to an ahead drive condition.

Claim 5

Reversible reduction gear apparatus for alternatively coupling an input shaft to an output shaft in a forward drive direction and in a reverse drive direction including in combination, an input shaft, on output shaft, an output gear on said output shaft, a forward drive gear carried by said input shaft for rotation therewith, a first intermediate shaft, a second intermedIate shaft, respective intermediate gears carried by said intermediate shafts for rotation therewith, said intermediate gears meshing with said ahead input gear, respective ahead output pinions rotatably carried by said intermediate shafts, said ahead pinions meshing with said output gear, ahead positive clutch means actuatable between an engaged condition at which said ahead pinions are coupled to said intermediate shafts and a disengaged condition, a reverse pinion rotatably carried by said input shaft, said reverse pinion meshing with said output gear, reverse positive clutch means adapted to be actuated between an engaged condition at which said reverse pinion is clutched to said input shaft and a disengaged condition, means adapted to be actuated to brake said ahead output pinions, mechanical spring means for normally urging said ahead clutch means to engaged condition and said astern clutch means to disengaged condition and control means for actuating said braking means and for actuating said clutch means against the action of said spring means to place said system in reverse driving condition.

Claim 6

Reversible reduction gear apparatus for alternatively coupling an input shaft to an output shaft in a forward drive direction and in a reverse drive direction including in combination, an input shaft, on output shaft, an output gear on said output shaft, a forward drive gear carried by said input shaft for rotation therewith, a first intermediate shaft, a second intermedIate shaft, respective intermediate gears carried by said intermediate shafts for rotation therewith, said intermediate gears meshing with said ahead input gear, respective ahead output pinions rotatably carried by said intermediate shafts, said ahead pinions meshing with said output gear, ahead positive clutch means actuatable between an engaged condition at which said ahead pinions are coupled to said intermediate shafts and a disengaged condition, a reverse pinion rotatably carried by said input shaft, said reverse pinion meshing with said output gear, reverse positive clutch means adapted to be actuated between an engaged condition at which said reverse pinion is clutched to said input shaft and a disengaged condition, means adapted to be actuated to brake said ahead output pinions, mechanical spring means for normally urging said ahead clutch means to engaged condition and said astern clutch means to disengaged condition and control means for actuating said braking means and for actuating said clutch means against the action of said spring means to place said system in reverse driving condition.

Claim 7

Apparatus as in claim 4 in which said control means comprises jacking means for rotating said input shaft against the action of an idling torque.

Claim 8

Apparatus as in claim 4 in which said control means comprises means for actuating said brake means and releasing said clutch actuating means to permit said spring means to restore said system to the forward drive condition.

Claim 9

Reversible reduction gear apparatus for alternatively coupling an input shaft to an output shaft in a forward drive direction and in a reverse drive direction including in combination, an input shaft, an output shaft, and output gear on said output shaft, a forward drive gear system between said input shaft and said output gear, said forward drive gear system comprising forward positive clutch means actuatable between a disengaged condition and an engaged condition at which said forward drive gear system positively couples said input shaft to said output gear, a reverse drive gear system between said input shaft and said output gear, said reverse drive gear system comprising reverse positive clutch means actuatable between a disengaged condition and an engaged condition at which said reverse drive gear system couples said input shaft to said output gear, means normally urging said forward clutch to said engaged condition and said reverse clutch to disengaged condition to couple said input shaft to said output gear in a forward drive direction, normally released brake means adapted to be actuated to brake said output gear, and control means for sequentially actuating said brake means and then disengaging said forward clutch means and engaging said reverse clutch means to couple said input shaft to said output gear in a reverse direction, and including a prime mover shaft having an idle torque coupled to said input shaft, said forward drive clutch means comprising a rotatable forward driven member operatively connected to said output gear shaft and a rotatable forward driving member operatively connected to be rotatably driven by said input shaft and actuatable to operatively engage and rotatably drive said forward driven member, said forward driving and driven members having positively interengaging elements thereon, and in which said reverse clutch means comprises a rotatable reverse driven member operatively connected to said output gear, a rotatable reverse driving member operatively connected to be rotatably driven by said input shaft and actuatable to operatively engage and rotatably drive said reverse driven member, said reverse driven and driving members having positively interengaging elements thereon, and in which said urging means comprises spring means for normally urging said forward members into engagement and for urging said reverse members out of engagement, and in which said control means comprises fluid pressure means for moving said members relative to each other againsT rhe action of said spring means.

Claim 10

Reversible reduction gear apparatus for alternatively coupling an input shaft to an output shaft in a forward drive direction and in a reverse drive direction including in combination, an input shaft, an output shaft, and output gear on said output shaft, a forward drive gear system between said input shaft and said output gear, said forward drive gear system comprising forward positive clutch means actuatable between a disengaged condition and an engaged condition at which said forward drive gear system positively couples said input shaft to said output gear, a reverse drive gear system between said input shaft and said output gear, said reverse drive gear system comprising reverse positive clutch means actuatable between a disengaged condition and an engaged condition at which said reverse drive gear system couples said input shaft to said output gear, means normally urging said forward clutch to said engaged condition and said reverse clutch to disengaged condition to couple said input shaft to said output gear in a forward drive direction, normally released brake means adapted to be actuated to brake said output gear, and control means for sequentially actuating said brake means and then disengaging said forward clutch means and engaging said reverse clutch means to couple said input shaft to said output gear in a reverse direction, and including a prime mover shaft having an idle torque coupled to said input shaft, said forward drive clutch means comprising a rotatable forward driven member operatively connected to said output gear shaft and a rotatable forward driving member operatively connected to be rotatably driven by said input shaft and actuatable to operatively engage and rotatably drive said forward driven member, said forward driving and driven members having positively interengaging elements thereon, and in which said reverse clutch means comprises a rotatable reverse driven member operatively connected to said output gear, a rotatable reverse driving member operatively connected to be rotatably driven by said input shaft and actuatable to operatively engage and rotatably drive said reverse driven member, said reverse driven and driving members having positively interengaging elements thereon, and in which said urging means comprises spring means for normally urging said forward members into engagement and for urging said reverse members out of engagement, and in which said control means comprises fluid pressure means for moving said members relative to each other againsT rhe action of said spring means.

Claim 11

Reversible reduction gear apparatus for alternatively coupling an input shaft to an output shaft in a forward drive direction and in a reverse drive direction including in combination, an input shaft, an output shaft, an output gear on said output shaft, a forward drive gear system between said input shaft and said output gear, said forward drive gear system comprising forward positive clutch means actuatable between a disengaged condition and an engaged condition at which said forward drive gear system positively couples said input shaft to said output gear, a reverse drive gear system between said input shaft and said output gear, said reverse drive gear system comprising reverse positive clutch means actuatable between a disengaged condition and an engaged condition at which said reverse drive gear system couples said input shaft to said output gear, means normally urging said forward clutch to said engaged condition and said reverse clutch to disengaged condition to couple said input shaft to said output gear in a forward drive direction, normally released brake means adapted to be actuated to brake said output gear, and control means for sequentially actuating said brake means and then disengaging said forward clutch means and engaging said reverse clutch means to couple said input shaft to said output gear in a reverse direction, and in which said input shaft has an idling torque and in which one of said clutch means comprises interengageable teeth, said system including jacking means for rotating said shaft against the action of said idling torque to actuate said one clutch means, and in which said jacking means comprises a cylinder, a piston disposed in said cylinder, means including a fluid clutch for coupling said piston to said shaft and in which said control means comprises means for supplying fluid under pressure to said clutch and to said cylinder for actuating said jacking means.

Claim 12

Reversible reduction gear apparatus for alternatively coupling an input shaft to an output shaft in a forward drive direction and in a reverse drive direction including in combination, an input shaft, an output shaft, an output gear on said output shaft, a forward drive gear system between said input shaft and said output gear, said forward drive gear system comprising forward positive clutch means actuatable between a disengaged condition and an engaged condition at which said forward drive gear system positively couples said input shaft to said output gear, a reverse drive gear system between said input shaft and said output gear, said reverse drive gear system comprising reverse positive clutch means actuatable between a disengaged condition and an engaged condition at which said reverse drive gear system couples said input shaft to said output gear, means normally urging said forward clutch to said engaged condition and said reverse clutch to disengaged condition to couple said input shaft to said output gear in a forward drive direction, normally released brake means adapted to be actuated to brake said output gear, and control means for sequentially actuating said brake means and then disengaging said forward clutch means and engaging said reverse clutch means to couple said input shaft to said output gear in a reverse direction, and in which said input shaft has an idling torque and in which one of said clutch means comprises interengageable teeth, said system including jacking means for rotating said shaft against the action of said idling torque to actuate said one clutch means, and in which said jacking means comprises a cylinder, a piston disposed in said cylinder, means including a fluid clutch for coupling said piston to said shaft and in which said control means comprises means for supplying fluid under pressure to said clutch and to said cylinder for actuating said jacking means.