Claims
- 1. In a tilt locking and shock absorbing arrangement for a marine outboard drive comprising a drive member supported for tilting movement relative to a hull of an associated watercraft about a substantially horizontally disposed tilt axis, a hydraulic assembly comprising a cylinder and a piston slidably supported in said cylinder and defining first and second chambers, a piston rod affixed to said piston and extending through one of said chambers, means for operatively interposing said hydraulic assembly between hull and said drive member for relative movement of said piston and said cylinder upon tilting movement of said drive member about said tilt axis, passage means extending between said first and second chambers, and defining a single fluid path therebetween valve means in said passage means for controlling the flow between said first chamber and said second chamber, said valve means comprising first check valve means in said passage means for permitting flow from said first chamber to said second chamber and for precluding flow from said second chamber to said first chamber, second check valve means in said passage means for permitting flow from said second chamber to said first chamber and for precluding flow from said first chamber to said second chamber, and control means for selectively opening one of said check valve means so that the other of said check valve means controls the flow through said passage means, the improvement comprising an accumulator having a first port comunicating solely with said first check valve means and a second port communicating solely with said second check valve means such that said fluid path includes said accumulator, said accumulator compensating for the changes in the volume of the fluid displaced from said one chamber by said piston rod.
- 2. In a tilt locking and shock absorbing arrangement as set forth in claim 1 further including damping means for permitting flow from the first chamber to the second chamber upon the application of a predetermined force tending to cause the drive member to tilt up about the tilt axis and for permitting flow from the second chamber to the first chamber upon the exertion of a predetermined force to effect tilt down of the drive member.
- 3. In a tilt locking and shock absorbing arrangement as set forth in claim 2 wherein the damping means comprises a first passage including pressure responsive absorber valve means for permitting flow from said first chamber to said second chamber upon the application of a predetermined force tending to cause said drive member to tilt up about said tilt axis, and a second passage including pressure responsive relief valve means for permitting flow from said second chamber to said first chamber upon the exertion of a predetermined force to effect tilt down of said drive member.
- 4. In a tilt locking and shock absorbing arrangement as set forth in claim 3 wherein the control means includes a single manually operable means for selectively opening each of the check valve means.
- 5. In a tilt locking and shock absorbing arrangement as set forth in claim 4 wherein the single manually operable means is operative to maintain a selected one of the check valve means in its open position and for permitting normal check valve operation of the other of the check valve means.
- 6. In a tilt locking and shock absorbing arrangement as set forth in claim 5 further including a second piston slidably supported in said cylinder on the side opposite said piston rod and adapted to engage the first mentioned piston for fixing the trim position of the drive member.
- 7. In a tilt locking and shock absorbing arrangement as set forth in claim 3 wherein the control means is movable between a first position wherein one of the check valve means is held in an opened condition and the other of the check valve means is permitted to function normally and a second position wherein the other of the check valve means is held in an opened position and the one of the check valve means is operative to perform its normal check valve function.
- 8. In a tilt locking and shock absorbing arrangement as set forth in claim 7 wherein the control means includes a single manually operative means for selectively opening each of the check valve means.
- 9. In a tilt locking and shock absorbing arrangement as set forth in claim 8 wherein there is a check valved passage extending through the second piston for permitting flow in one direction therethrough while precluding flow in the opposite direction.
- 10. In a tilt locking and shock absorbing arrangement as set forth in claim 1 wherein the control means includes a single manually operable means for selectively opening each of the check valve means.
- 11. In a tilt locking and shock absorbing arrangement as set forth in claim 10 further including a second piston slidably supported in said cylinder on the side opposite said piston rod and adapted to engage the first mentioned piston for fixing the trim position of the drive member.
- 12. In a tilt locking and shock absorbing arrangement as set forth in claim 10 wherein the single manually operable means is operative to maintain a selected one of the check valve means in its open position and for permitting normal check valve operation of the other of the check valve means.
- 13. In a tilt locking and shock absorbing arrangement as set forth in claim 12 further including a second piston slidably supported in said cylinder on the side opposite said piston rod and adapted to engage the first mentioned piston for fixing the trim position of the drive member.
- 14. In a tilt locking and shock absorbing arrangement as set forth in claim 1 wherein the control means is movable between a first position wherein one of the check valve means is held in an opened condition and the other of the check valve means is permitted to function normally and a second position wherein the other of the check valve means is held in an opened position and the one of the check valve means is operative to perform its normal check valve function.
- 15. In a tilt locking and shock absorbing arrangement as set forth in claim 14 further including a second piston slidably supported in said cylinder on the side opposite said piston rod and adapted to engage the first mentioned piston for fixing the trim position of the drive member.
- 16. In a tilt locking and shock absorbing arrangement as set forth in claim 15 wherein there is a check valve passage extending through the second piston for permitting flow in one direction therethrough while precluding flow in the opposite direction.
Priority Claims (1)
Number |
Date |
Country |
Kind |
58-223350 |
Nov 1983 |
JPX |
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Parent Case Info
This is a continuation of U.S. patent application Ser. No. 668,388, filed Nov. 5, 1984, now abandoned.
US Referenced Citations (21)
Foreign Referenced Citations (3)
Number |
Date |
Country |
57-95295 |
Jan 1982 |
JPX |
122288 |
Jul 1983 |
JPX |
58-174093 |
Oct 1983 |
JPX |
Continuations (1)
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Number |
Date |
Country |
Parent |
668388 |
Nov 1984 |
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