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AssigneeOutboard Marine Corporation
InventorsCharles B. Hall, Robert F. Young
Estimating the term…
A propulsion assembly includes hydraulic trim and tilt cylinders and a reversible pump effective when operating in a first mode, to supply hydraulic fluid under pressure to a first port and to provide suction at a second port and effective when operating in a second mode, to supply hydraulic fluid under pressure to the second port and to provide suction at the first port, a first conduit communicating between one end of the tilt cylinder and the first pump port and including a first valve biased so as to releasably prevent flow from the first end of the tilt cylinder to the first pump port and so as to permit fluid flow from the first pump port to the first end of the tilt cylinder in response to the presence of hydraulic fluid under pressure at the first pump port, a second conduit communicating between the first end of the trim cylinder and the first pump port independently of the first conduit, and a piston communicating with the second pump port for actuating the first valve against the bias thereof and in response to the presence of hydraulic fluid under pressure at the second pump port so as to permit hydraulic fluid flow from the first end of the tilt cylinder to the first pump port without affecting the trim cylinder-piston assembly.
A marine propulsion device including a member adapted to be attached to a boat hull, a propulsion assembly pivotally connected to said member for vertical swinging movement when said member is attached to the boat hull, a tilt hydraulic cylinder-piston assembly connected between said member and said propulsion assembly and including a tilt cylinder having opposed first and second ends, a trim hydraulic cylinder-piston assembly including a trim cylinder fixed relative to one of said member and said propulsion assembly, having opposed first and second ends, and having therein a reciprocably movable trim piston having a piston rod extending through one of said ends of said trim cylinder and adapted for releasable engagement with the other of said member and said propulsion assembly, a reversible pump including first and second ports, said pump being operative, when said pump is operating in a first mode, to supply hydraulic fluid under pressure at said first port and to provide suction at said second port and being operative, when said pump is operating in a second mode, to supply hydraulic fluid under pressure at said second port and to provide suction at said first port, first conduit means communicating between said first end of said tilt cylinder and said first pump port and including a first valve biased so as to releasably prevent flow from said first end of said tilt cylinder to said first pump port and so as to permit fluid flow from said first pump port to said first end of said tilt cylinder in response to the presence of hydraulic fluid under pressure at said first pump port, second conduit means communicating between said first end of said trim cylinder and said first pump port independently of said first valve means, said second conduit means including a second valve biased so as to releasably prevent flow from said first end of said trim cylinder to said first port and so as to permit fluid flow from said first pump port to said first end of said trim cylinder in response to the presence of hydraulic fluid under pressure at said first pump port and independently of said first valve means, and third conduit means communicating between said second pump port and said second ends of said trim cylinder and said tilt cylinder.
A marine propulsion device including a member adapted to be attached to a boat hull, a propulsion assembly pivotally connected to said member for vertical swinging movement when said member is attached to the boat hull, a tilt hydraulic cylinder-piston assembly connected between said member and said propulsion assembly and including a tilt cylinder having opposed first and second ends, a trim hydraulic cylinder-piston assembly including a trim cylinder fixed relative to one of said member and said propulsion assembly, having opposed first and second ends, and having therein a reciprocably movable trim piston having a piston rod extending through one of said ends of said trim cylinder and adapted for releasable engagement with the other of said member and said propulsion assembly, a reversible pump including first and second ports, said pump being operative, when said pump is operating in a first mode, to supply hydraulic fluid under pressure at said first port and to provide suction at said second port and being operative, when said pump is operating in a second mode, to supply hydraulic fluid under pressure at said second port and to provide suction at said first port, first conduit means communicating between said first end of said tilt cylinder and said first pump port and including a first valve biased so as to releasably prevent flow from said first end of said tilt cylinder to said first pump port and so as to permit fluid flow from said first pump port to said first end of said tilt cylinder in response to the presence of hydraulic fluid under pressure at said first pump port, second conduit means communicating between said first end of said trim cylinder and said first pump port, third conduit means communicating between said second pump port and said second ends of said trim cylinder and said tilt cylinder, means communicating with said second pump port for actuating said first valve against the bias thereof and in response to the presence of hydraulic fluid under pressure at said second pump port so as to permit hydraulic fluid flow from said first end of said tilt cylinder to said first pump port, a shuttle valve housing having a first end communicating between said first pump port and said first and second conduit means, and a second end communicating between said second pump port and said third conduit means, a second valve which is normally closed and which communicates between said first end of sad shuttle valve housing and said second conduit means and is arranged to releasably prevent fluid flow therethrough to and from said first end of said shuttle valve housing, and a third valve which is normally closed and which communicates between said second end of said shuttle valve housing and said third conduit means and which is arranged to releasably prevent flow therethrough to and from said second end of said shuttle valve housing.
A marine propulsion device including a member adapted to be attached to a boat hull, a propulsion assembly pivotally connected to said member for vertical swinging movement when said member is attached to the boat hull, a tilt hydraulic cylinder-piston assembly connected between said member and said propulsion assembly and including a tilt cylinder having opposed first and second ends, a trim hydraulic cylinder-piston assembly including a trim cylinder fixed relative to one of said member and said propulsion assembly, having opposed first and second ends, and having therein a reciprocably movable trim piston having a piston rod extending through one of said ends of said trim cylinder and adapted for releasable engagement with the other of said member and said propulsion assembly, a reversible pump including first and second ports, said pump being operative, when said pump is operating in a first mode, to supply hydraulic fluid under pressure at said first port and to provide suction at said second port and being operative, when said pump is operating in a second mode, to supply hydraulic fluid under pressure at said second port and to provide suction at said first port, first conduit means communicating between said first end of said tilt cylinder and said first pump port and including a first valve biased so as to releasably prevent flow from said first end of said tilt cylinder to said first pump port and so as to permit fluid flow from said first pump port to said first end of said tilt cylinder in response to the presence of hydraulic fluid under pressure at said first pump port, second conduit means communicating between said first end of said trim cylinder and said first pump port, third conduit means communicating between said second pump port and said second ends of said trim cylinder and said tilt cylinder, means communicating with said second pump port for actuating said first valve against the bias thereof and in response to the presence of hydraulic fluid under pressure at said second pump port so as to permit hydraulic fluid flow from said first end of said tilt cylinder to said first pump port, additional conduit means communicating between said first and second ends of said tilt cylinder and including means operative for temporarily affording fluid flow from said first end of said tilt cylinder to said second end of said tilt cylinder in response to the generation of relatively high pressure adjacent said second end of said tilt cylinder occurring incident to the striking of an underwater obstacle.
A marine propulsion device including a member adapted to be attached to a boat hull, a propulsion assembly pivotally connected to said member for vertical swinging movement when said member is attached to the boat hull, a tilt hydraulic cylinder-piston assembly connected between said member and said propulsion assembly and including a tilt cylinder having opposed first and second ends, a trim hydraulic cylinder-piston assembly including a trim cylinder fixed relative to one of said member and said propulsion assembly, having opposed first and second ends, and having therein a reciprocably movable trim piston having a piston rod extending through one of said ends of said trim cylinder and adapted for releasable engagement with the other of said member and said propulsion assembly, a reversible pump including first and second ports, said pump being operative, when said pump is operating in a first mode, to supply hydraulic fluid under pressure at said first port and to provide suction at said second port and being operative, when said pump is operating in a second mode, to supply hydraulic fluid under pressure at said second port and to provide suction at said first port, a sump communicating with said first and second ports, first conduit means communicating between said first end of said tilt cylinder and said first pump port and including a first valve biased so as to releasably prevent flow from said first end of said tilt cylinder to said first pump port and so as to permit fluid flow from said first pump port to said first end of said tilt cylinder in response to the presence of hydraulic fluid under pressure at said first pump port, second conduit means communicating between said first end of said trim cylinder and said first pump port independently of said first valve means, third conduit means communicating between said second pump port and said second ends of said trim cylinder and said tilt cylinder independently of said sump to permit pressure fluid flow from said second pump port to said second ends of said trim and tilt cylinders, and means communicating with said second pump port for actuating said first valve against the bias thereof and in response to the presence of hydraulic fluid under pressure at said second pump port so as to permit hydraulic fluid flow from said first end of said tilt cylinder to said first pump port.
A marine propulsion device including a member adapted to be attached to a boat hull, a propulsion assembly pivotally connected to said member for vertical swinging movement when said member is attached to the boat hull, a tilt hydraulic cylinder-piston assembly connected between said member and said propulsion assembly and including a tilt cylinder having opposed first and second ends, a trim hydraulic cylinder-piston assembly including a trim cylinder fixed relative to one of said member and said propulsion assembly, having opposed first and second ends, and having therein a reciprocably movable trim piston having a piston rod extending through one of said ends of said trim cylinder and adapted for releasable engagement with the other of said member and said propulsion assembly, a reversible pump including first and second ports, said pump being operative, when said pump is operating in a first mode, to supply hydraulic fluid under pressure at said first port and to provide suction at said second port and being operative, when said pump is operating in a second mode, to supply hydraulic fluid under pressure at said second port and to provide suction at said first port, first conduit means communicating between said first end of said tilt cylinder and said first pump port and including a first valve biased so as to releasably prevent flow from said first end of said tilt cylinder to said first pump port and so as to permit fluid flow from said first pump port to said first end of said tilt cylinder in response to the presence of hydraulic fluid under pressure at said first pump port, second conduit means communicating between said first end of said trim cylinder and said first pump port and including a second valve biased so as to releasably prevent flow from said first end of said trim cylinder to said first pump port and so as to permit fluid flow from said first pump port to said first end of said trim cylinder in response to the presence of hydraulic fluid under pressure at said first pump port, third conduit means communicating between said second pump port and said second ends of said trim cylinder and said tilt cylinder, first means communicating with said second pump port for actuating said first valve against the bias thereof and in response to the presence of hydraulic fluid under pressure at said second pump port so as to permit hydraulic fluid flow from said first end of said tilt cylinder to said first pump port, and second means communicating with said second pump port for actuating said second valve against the bias thereof and in response to the presence of hydraulic fluid under pressure at said second pump port so as to permit hydraulic fluid flow from said first end of said trim cylinder to said first pump port.
Dependencies are inferred from the claim text.