US3628487A - Hydraulically operated trim attachment for powerboats - Google Patents

Hydraulically operated trim attachment for powerboats Download PDF

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US3628487A
US3628487A US3756A US3628487DA US3628487A US 3628487 A US3628487 A US 3628487A US 3756 A US3756 A US 3756A US 3628487D A US3628487D A US 3628487DA US 3628487 A US3628487 A US 3628487A
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bracket
cylinder
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Charles H Bennett
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
    • B63B39/06—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water
    • B63B39/061—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water by using trimflaps, i.e. flaps mounted on the rear of a boat, e.g. speed boat

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  • ABSTRACT A powerboat including a pair of trim members [52] U.S.Cl 114/665 hinged to the Stem of the bum and a hydraulic cyfinder in [51] lnt.Cl B63! 1/22 ll b E h h d d [50] Field ofsearch 1l4/66.5 P, I l Oeac mem ac y raulc Cym ens conlSO; 244/85; 92/92, 119
  • the hydraulic pump has unique features to control volume and pressure.
  • a hydraulically operated trim attachment for trim members of the type shown in the aforementioned patents which includes a novel hydraulic operating mechanism that does not utilize external supply lines; which utilizes a novel hydraulic cylinder structure; and which can be operated in both fresh and salt water without damage to the trim attachment.
  • a powerboat including a pair of trim members hinged to the stern of the boat and a hydraulic cylinder individual to each trim member.
  • the hydraulic cylinder is constructed and arranged so that no external hydraulic lines are needed between the boat and the cylinder.
  • the hydraulic pump has unique features to control volume and pressure.
  • FIG. 1 is a fragmentary perspective view of a boat embodying the invention.
  • FIG. 2 is a part sectional side elevational view of a portion of the boat shown in FIG. 1.
  • FIG. 3 is a fragmentary sectional view of a portion of the cylinder shown in FIG. 2.
  • FIG. 4 is a schematic diagram of the control system.
  • FIG. 5 is a part sectional elevational view of a portion of the system shown in FIG. 4.
  • FIG. 6 is a fragmentary sectional view taken along the line 66 in FIG. 5.
  • FIG. 7 is a fragmentary sectional view taken along the line 7-7 in FIG. 5.
  • FIG. 8 is a sectional view of a modified construction taken along the line 8-8 in FIG. 7.
  • boat 10 has a pair of trim members 11 hinged to the transom 12 in the manner disclosed and claimed in the aforementioned U.S. Pat. Nos. 3,062,167, and 3,399,643.
  • Each of the trim members comprises a generally flat portion 13 having an end 14 which is hooked into the hooked end 15 of a bracket I6 to provide a hinge.
  • Each member further includes an upstanding flange 17. The underside of the trim member 11 when in horizontal position is substantially in the plane of the bottom 18 of the boat.
  • the angle of the trim member with respect to the boat can be varied by use of a hydraulic cylinder 20 comprising a cylindrical body 21 having a lower head 22 integral therewith and an upper head 23 that is threaded thereon.
  • a piston 24 with an O-ring seal 25 is reciprocable within the cylinder and is yieldingly urged upwardly by a spring 26 interposed between the piston 24 and the lower head 22.
  • Piston shaft 27 on piston 24 is pivoted to a bracket 29 on trim member 1 l.
  • a hollow tubular bag element 30 is provided above the piston 24 and has a peripheral integral O-ring 31 (FIG. 3). The head 23 when threaded onto the body 21 engages the O-ring to provide a seal.
  • the bag element 30 prevents the entry of water and the like which might leak past the piston 24 into the hydraulic system for operating the cylinder.
  • the head 23 further includes an integral projection 32 that limits the upward movement of the piston 24.
  • the bag element 30 is interposed in the cylinder with a layer of grease or oil between the outer surfaces thereof and the cylinder so that air will not be entrapped between the outer surface thereof and the cylinder.
  • Head 23 includes a generally rectangular interconnecting element or flange 33 having a fluid opening 34 therein and an integral bracket 35 which has a surface 36 for engaging the transom 12.
  • a fluid line 37 extends through an opening 38 in the transom and is threaded into the bracket 35 in an opening 39 which communicates with passage 34.
  • Fluid can be selectively applied through line 37 to force the piston 24 downwardly or permitted to escape through line 37 to permit the spring 26 to force the piston upwardly.
  • the spring functions to hold the tabs horizontal at dockside.
  • the integral interconnecting element 33 is preferably made of plastic as is the entire head 23 and bracket 35 so that there is limited permissible movement between the head 23 and bracket 35 permitting accommodation for varying angles of the transom 12 as well as changes necessitated by the sweep of the connecting axis at bracket 29 as the angle of the trim tab is varied.
  • a satisfactory plastic material comprises Nylon 610 made by E. I. duPont Company and incorporating glass fibers.
  • the cylindrical body 21, piston 24; piston shaft 27, bracket 29 and pin are preferably made of the same material.
  • the apparatus for controlling the flow of fluid to the cylinders 20 comprises a pump 40 which receives fluid from a reservoir 41 and when energized in one direction supplies the fluid through a line 42 to solenoid-operated valves 43, 44 controlling communication between the line 42 and line 37 to each of the cylinders.
  • a pump 40 When the pump 40 is operated in one direction, fluid is supplied to the cylinder, and when it is operated in the opposite direction, fluid is withdrawn from the cylinders as the piston 24 forces the fluid out of the cylinder.
  • the pump is of the wellknown gyrotor type and comprises a driven member 45 and a floating member 46.
  • the control of fluid from the reservoir 41 to the inlet 47 is through an orifice 48.
  • the outlet of the pump has a portion thereof vented through an orifice 49 back to the reservoir thereby controlling pressure of fluid out of the pump.
  • the restricting orifice 48 on the supply side controls the volume or flow and the orifice 49 prevents an excessive pressure.
  • a 0.025 inch orifice on the pressure side reduces maximum pressure from 850 to 500 pounds.
  • the control of volume through supply side orifice 48 enables the provision of gentle action of the tabs.
  • FIG. 8 shows a different type of a restrictor relief valve 60 and its design eliminates the need for energizing the pump to withdraw fluid from the actuators.
  • FIG. 8 there is a floating piston 62 with an orifice 62a through it.
  • An opening 61 extends from the pressure passage to the reservoir.
  • a spring 63 has an adjusting screw or stop 64.
  • Piston 62 has a portion 62b of reduced diameter in the area which covers the passage 61.
  • a powerboat the combination comprising a pair or trim members hinged to the stern of the boat, one
  • said cylinder comprising a body having a head at one end and a head at the other end,
  • said bracket having a fluid opening therein
  • said interconnecting means having a fluid opening providing communication between said openings
  • said interconnecting means between said bracket and said first head comprising an integral flange
  • said flange having said fluid opening therein providing communication between the openings in said bracket and said first head.
  • bracket head and flange are made of integral plastic.
  • said flexible wall having a portion thereof adapted to be claimed by said head against said body.
  • the combination comprising a trim member adapted to be hinged to the stern of the boat,
  • said cylinder comprising a body having a head at one end and a head at the other end,
  • bracket having a surface generally complementary to the transom of a boat
  • said bracket having a fluid opening therein
  • said interconnecting means comprising a fluid opening providing communication between said openings
  • said interconnecting means between said bracket and said first head comprising an integral flange
  • said flange having an opening therein communicating with the openings in said bracket and said first head.
  • said flexible wall having a portion thereof adapted to be clamped by said head against said body.
  • said cylinder comprising a body having a first head at one end and a second head at the other end,
  • bracket having a surface generally complementary to the transom of a boat
  • said bracket having a fluid opening therein
  • said interconnecting means comprising a fluid opening providing communication between said openings
  • said interconnecting means between said bracket and said first head comprising an integral flange
  • said flange having an opening therein communicating with the openings in said bracket and said first head.
  • said flexible wall having a portion thereof adapted to be clamped by said head against said body.
  • said cylinder comprising a body having a first head at one end and a second head at the other end,
  • said bracket having a fluid opening therein
  • said interconnecting means comprising an integral flange having a fluid opening providing communication between said openings

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Actuator (AREA)
  • Steroid Compounds (AREA)

Abstract

A powerboat including a pair of trim members hinged to the stern of the boat and a hydraulic cylinder individual to each trim member. Each hydraulic cylinder is constructed and arranged so that no external hydraulic lines are needed between the boat and the cylinder. The hydraulic pump has unique features to control volume and pressure.

Description

0 United States Patent 1 1 3,628,487
[72] Inventor Charles H. Bennett [56] References Cited 20400 Nine Mile Road, St. Clair Shores, UNITED STATES PATENTS 21 A I N 8080 3,177,837 4/1965 Sherrill 114/665 P l 1 2,790,426 4/1957 Mueller.. 92/119 [22] 3 431 031 3/1969 lk 92/92 x 451 Patented Dec. 21 1971 e 2,479,063 8/1949 Forsythe l 14/150 Primary Examiner-Andrew H. Farrell [54] HYDRAUUCAL Y P A E TRIM Attorney-Barnes, Kisselle, Raisch & Choate ATTACHMENT FOR POWERBOATS 22 Claims, 8 Drawing Figs.
ABSTRACT: A powerboat including a pair of trim members [52] U.S.Cl 114/665 hinged to the Stem of the bum and a hydraulic cyfinder in [51] lnt.Cl B63!) 1/22 ll b E h h d d [50] Field ofsearch 1l4/66.5 P, I l Oeac mem ac y raulc Cym ens conlSO; 244/85; 92/92, 119
structed and arranged so that no external hydraulic lines are needed between the boat and the cylinder. The hydraulic pump has unique features to control volume and pressure.
PATENTEUUEEZHH?! 3,628.48?
sum 1 OF 2 /6 IN VEN TOR.
(A A2155 BAN/Vffi' BY ATTORNEYS PATENTED [IECZI I97! SHEET 2 [IF 2 FIG.4
INVENTOR.
ATTORNEYS HYDRAULICALLY OPERATED TRIM ATTACHMENT FOR POWERBOATS This invention relates to boats and particularly to powerboats.
BACKGROUND OF THE INVENTION In my prior U.S. Pat. No. 3,062,167, issued Nov. 6, 1962, and No. 3,399,643, issued Sept. 3, I968, there are disclosed and claimed trim attachments for powerboats which comprise trim members that are hinged to the stern of the boat and are actuated to vary the angles thereof and thereby provide control of the attitude of the boat. Such arrangements permit longitudinal and lateral trimming of the boat under varying load in order to obtain optimum attitude for movement of the boat through the water and result in greater speed with less fuel consumption, improve visibility, and permit adjustment to be made under varying load conditions and to be removed in rough water.
Among the objects of the invention are to provide a hydraulically operated trim attachment for trim members of the type shown in the aforementioned patents which includes a novel hydraulic operating mechanism that does not utilize external supply lines; which utilizes a novel hydraulic cylinder structure; and which can be operated in both fresh and salt water without damage to the trim attachment.
SUMMARY OF THE INVENTION A powerboat including a pair of trim members hinged to the stern of the boat and a hydraulic cylinder individual to each trim member. The hydraulic cylinder is constructed and arranged so that no external hydraulic lines are needed between the boat and the cylinder. The hydraulic pump has unique features to control volume and pressure.
DESCRIPTION OF THE DRAWINGS FIG. 1 is a fragmentary perspective view of a boat embodying the invention.
FIG. 2 is a part sectional side elevational view of a portion of the boat shown in FIG. 1.
FIG. 3 is a fragmentary sectional view of a portion of the cylinder shown in FIG. 2.
FIG. 4 is a schematic diagram of the control system.
FIG. 5 is a part sectional elevational view of a portion of the system shown in FIG. 4.
FIG. 6 is a fragmentary sectional view taken along the line 66 in FIG. 5.
FIG. 7 is a fragmentary sectional view taken along the line 7-7 in FIG. 5.
FIG. 8 is a sectional view of a modified construction taken along the line 8-8 in FIG. 7.
DESCRIPTION Referring to FIG. 1, boat 10 has a pair of trim members 11 hinged to the transom 12 in the manner disclosed and claimed in the aforementioned U.S. Pat. Nos. 3,062,167, and 3,399,643. Each of the trim members comprises a generally flat portion 13 having an end 14 which is hooked into the hooked end 15 of a bracket I6 to provide a hinge. Each member further includes an upstanding flange 17. The underside of the trim member 11 when in horizontal position is substantially in the plane of the bottom 18 of the boat.
The angle of the trim member with respect to the boat can be varied by use of a hydraulic cylinder 20 comprising a cylindrical body 21 having a lower head 22 integral therewith and an upper head 23 that is threaded thereon. A piston 24 with an O-ring seal 25 is reciprocable within the cylinder and is yieldingly urged upwardly by a spring 26 interposed between the piston 24 and the lower head 22. Piston shaft 27 on piston 24 is pivoted to a bracket 29 on trim member 1 l. A hollow tubular bag element 30 is provided above the piston 24 and has a peripheral integral O-ring 31 (FIG. 3). The head 23 when threaded onto the body 21 engages the O-ring to provide a seal. The bag element 30 prevents the entry of water and the like which might leak past the piston 24 into the hydraulic system for operating the cylinder. The head 23 further includes an integral projection 32 that limits the upward movement of the piston 24. In practice, the bag element 30 is interposed in the cylinder with a layer of grease or oil between the outer surfaces thereof and the cylinder so that air will not be entrapped between the outer surface thereof and the cylinder.
Head 23 includes a generally rectangular interconnecting element or flange 33 having a fluid opening 34 therein and an integral bracket 35 which has a surface 36 for engaging the transom 12. A fluid line 37 extends through an opening 38 in the transom and is threaded into the bracket 35 in an opening 39 which communicates with passage 34.
Fluid can be selectively applied through line 37 to force the piston 24 downwardly or permitted to escape through line 37 to permit the spring 26 to force the piston upwardly. The spring functions to hold the tabs horizontal at dockside.
In accordance with the invention, the integral interconnecting element 33 is preferably made of plastic as is the entire head 23 and bracket 35 so that there is limited permissible movement between the head 23 and bracket 35 permitting accommodation for varying angles of the transom 12 as well as changes necessitated by the sweep of the connecting axis at bracket 29 as the angle of the trim tab is varied. A satisfactory plastic material comprises Nylon 610 made by E. I. duPont Company and incorporating glass fibers. The cylindrical body 21, piston 24; piston shaft 27, bracket 29 and pin are preferably made of the same material.
Referring to FIG. 4, the apparatus for controlling the flow of fluid to the cylinders 20 comprises a pump 40 which receives fluid from a reservoir 41 and when energized in one direction supplies the fluid through a line 42 to solenoid-operated valves 43, 44 controlling communication between the line 42 and line 37 to each of the cylinders. When the pump 40 is operated in one direction, fluid is supplied to the cylinder, and when it is operated in the opposite direction, fluid is withdrawn from the cylinders as the piston 24 forces the fluid out of the cylinder.
As shown in FIGS. 5, 6, and 7, the pump is of the wellknown gyrotor type and comprises a driven member 45 and a floating member 46. In accordance with the invention, the control of fluid from the reservoir 41 to the inlet 47 is through an orifice 48. The outlet of the pump has a portion thereof vented through an orifice 49 back to the reservoir thereby controlling pressure of fluid out of the pump.
The restricting orifice 48 on the supply side controls the volume or flow and the orifice 49 prevents an excessive pressure. For example, a 0.025 inch orifice on the pressure side reduces maximum pressure from 850 to 500 pounds. The control of volume through supply side orifice 48 enables the provision of gentle action of the tabs.
FIG. 8 shows a different type of a restrictor relief valve 60 and its design eliminates the need for energizing the pump to withdraw fluid from the actuators.
In FIG. 8 there is a floating piston 62 with an orifice 62a through it. An opening 61 extends from the pressure passage to the reservoir. A spring 63 has an adjusting screw or stop 64. Piston 62 has a portion 62b of reduced diameter in the area which covers the passage 61.
When pump is energized behind the piston 62 with the constricting orifice 62a moves with the flow and it covers the passage 61 making all of the fluid go to the actuators. When the actuators are at their limit of stroke the fluid is slowed and the spring 63 moves the floating piston back to at least partially open the passage 61 leading to the reservoir providing a limit on the pressure. Thus pressure is adjustable by the setscrew 64 against the spring 63.
For retracting the actuators it is only necessary to open the solenoid valve in the line and the fluidl will pass back into the reservoir as the spring 63 will have pushed the floating piston back opening the passage 62.
It will be appreciated that by operating the pump in one direction or the other, a varying inclination to the trim members can be achieved in order to produce the desired trim of the boat as more fully set forth in the aforementioned US. patents.
I claim:
1. In a powerboat, the combination comprising a pair or trim members hinged to the stern of the boat, one
on each side of the centerline of the boat,
means for hinging each said trim member along its forward edge to the boat,
and a hydraulic cylinder individual to each said trim member,
said cylinder comprising a body having a head at one end and a head at the other end,
a piston within said body,
a shaft connected to said piston extending through said second head,
means for connecting said shaft to said trim member,
a bracket having a surface complementary to the transom of the boat,
means for mounting said bracket on said transom,
means interconnecting said bracket and said first-mentioned head of said cylinder in a manner to permit limited relative movement therebetween,
said first head having a fluid opening therein,
said bracket having a fluid opening therein,
said interconnecting means having a fluid opening providing communication between said openings,
said interconnecting means between said bracket and said first head comprising an integral flange,
said flange having said fluid opening therein providing communication between the openings in said bracket and said first head.
2. The combination set forth in claim 1 wherein said bracket head and flange are made of integral plastic.
3. The combination set forth in claim 1 including a flexible wall within aid body of said cylinder in the end thereof opposite the end of said piston which has said shaft extending therethrough.
4. The combination set forth in claim 3 wherein said flexible wall is generally cylindrical in shape.
5. The combination set forth in claim 3 wherein said first head is removable,
said flexible wall having a portion thereof adapted to be claimed by said head against said body.
6. The combination set forth in claim 1 including controls for said cylinder comprising a pump, a reservoir, and
an inlet extending from said reservoir to said pump,
an outlet extending from said pump,
first orifice means between said inlet and said reservoir,
second orifice means between said outlet and said reservoir.
7. The combination set forth in claim 6 including a pressure release valve associated with said first-mentioned orifice means.
8. For use in a powerboat, the combination comprising a trim member adapted to be hinged to the stern of the boat,
means for hinging said trim member along its forward edge to the boat,
and a hydraulic cylinder,
said cylinder comprising a body having a head at one end and a head at the other end,
a piston within said body,
a shaft connected to said piston extending through said second head,
means for connecting said shaft to said trim member,
a bracket having a surface generally complementary to the transom of a boat,
means for mounting said bracket on said transom,
means interconnecting said bracket and said first-mentioned head of said cylinder in a manner to permit limited relative movement therebetween,
said first head having a fluid opening therein,
said bracket having a fluid opening therein,
said interconnecting means comprising a fluid opening providing communication between said openings,
said interconnecting means between said bracket and said first head comprising an integral flange,
said flange having an opening therein communicating with the openings in said bracket and said first head.
9. The combination set forth in claim 1 wherein said bracket, head and flange are made of integral plastic.
10. The combination set forth in claim 1 including a flexible wall within said body of said cylinder in the end thereof opposite the end of said piston which has said shaft extending therethrough.
11. The combination set forth in claim 10 wherein said flexible wall is generally cylindrical in shape.
12. The combination set forth in claim 10 wherein said first head is removable,
said flexible wall having a portion thereof adapted to be clamped by said head against said body.
13. The combination set forth in claim 1 including controls for said cylinder comprising a pump, a reservoir, and
an inlet extending from said reservoir to said pump,
an outlet extending from said pump,
first orifice means between said inlet and said reservoir,
second orifice means between said outlet and said reservoir.
14. The combination set forth in claim 13 including a pressure release valve associated with said first-mentioned orifice means.
15. The combination comprising a hydraulic cylinder,
said cylinder comprising a body having a first head at one end and a second head at the other end,
a piston within said body,
a shaft connected to said piston extending through said second head,
means for connecting said shaft to a work member,
a bracket having a surface generally complementary to the transom of a boat,
means for mounting said bracket on a support,
means interconnecting said bracket and said first-mentioned heat of said cylinder in a manner to permit limited relative movement therebetween,
said first head having a fluid opening therein,
said bracket having a fluid opening therein,
said interconnecting means comprising a fluid opening providing communication between said openings,
said interconnecting means between said bracket and said first head comprising an integral flange,
said flange having an opening therein communicating with the openings in said bracket and said first head.
16. The combination set forth in claim 15 wherein said bracket, head and flange are made of integral plastic.
17. The combination set forth in claim 15 including a flexible wall within said body of said cylinder in the end thereof opposite the end of said piston which has said shaft extending therethrough.
18. The combination set forth in claim 17 wherein said flexible wall is generally cylindrical in shape.
19. The combination set forth in claim 17 wherein said first head is removable,
said flexible wall having a portion thereof adapted to be clamped by said head against said body.
20. The combination set forth in claim 15 including controls for said cylinder comprising a pump, a reservoir, and
an inlet extending from said reservoir to said pump,
an outlet extending from said pump,
first orifice means between said inlet and said reservoir,
second orifice means between said outlet and said reservoir.
21. The combination set forth in claim 20 including a pressure release valve associated with said first-mentioned orifice means.
22. The combination comprising a hydraulic cylinder,
said cylinder comprising a body having a first head at one end and a second head at the other end,
a piston within said body,
said bracket having a fluid opening therein,
said interconnecting means comprising an integral flange having a fluid opening providing communication between said openings,
a flexible wall within said body of said cylinder in the end thereof opposite the end of said piston which has said shaft extending therethrough.

Claims (22)

1. In a powerboat, the combination comprising a pair or trim members hinged to the stern of the boat, one on each side of the centerline of the boat, means for hinging each said trim member along its forward edge to the boat, and a hydraulic cylinder individual to each said trim member, said cylinder comprising a body having a head at one end and a head at the other end, a piston within said body, a shaft connected to said piston extending through said second head, means for connecting said shaft to said trim member, a bracket having a surface complementary to the transom of the boat, means for mounting said bracket on said transom, means interconnecting said bracket and said first-mentioned head of said cylinder in a manner to permit limited relative movement therebetween, said first head having a fluid opening therein, said bracket having a fluid opening therein, said interconnecting means having a fluid opening providing communication between said openings, said interconnecting means between said bracket and said first head comprising an integral flange, said flange having said fluid opening therein providing communication between the openings in said bracket and said first head.
2. The combination set forth in claim 1 wherein said bracket head and flange are made of integral plastic.
3. The combination set forth in claim 1 including a flexible wall within aid body of said cylinder in the end thereof opposite the end of said piston which has said shaft extending therethrough.
4. The combination set forth in claim 3 wherein said flexible wall is generally cylindrical in shape.
5. The combination set forth in claim 3 wherein said first head is removable, said flexible wall having a portion thereof adapted to be claimed by said head against said body.
6. The combination set forth in claim 1 including controls for said cylinder comprising a pump, a reservoir, and an inlet extending from said reservoir to said pump, an outlet extending from said pump, first orifice means between said inlet and said reservoir, second orifice means between said outlet and said reservoir.
7. The combination set forth in claim 6 including a pressure release valve associated with said first-mentioned orifice means.
8. For use in a powerboat, the combination comprising a trim member adapted to be hinged to the stern of the boat, means for hinging said trim member along its forward edge to the boat, and a hydraulic cylinder, said cylinder comprising a body having a head at one end and a head at the other end, a piston within said body, a shaft connected to said piston extending through said second head, means for connecting said shaft to said trim member, a bracket having a surface generally complementary to the transom of a boat, means for mounting said bracket on said transom, means interconnecting said bracket and said first-mentioned head of said cylinder in a manner to permit limited relative movement therebetween, said first head having a fluid opening therein, said bracket having a fluid opening therein, said interconnecting means comprising a fluid opening providing communication between said openings, said interconnecting means between said bracket and said first head comprising an integral flange, said flange having an opening therein communicating with the openings in said bracket and said first head.
9. The combination set forth in claim 1 wherein said bracket, head and flange are made of integral plastic.
10. The combination set forth in claim 1 including a flexible wall within said body of said cylinder in the end thereof opposite the end of said piston which has said shaft extending therethrough.
11. The combination set forth in claim 10 wherein said flexible wall is generally cylindrical in shape.
12. The combination set forth in claim 10 wherein said first head is removable, said flexible wall having a portion thereof adapted to be clamped by said head against said body.
13. The combination set forth in claim 1 including controls for said cylinder comprising a pump, a reservoir, and an inlet extending from said reservoir to said pump, an outlet extending from said pump, first orifice means between said inlet and said reservoir, second orifice means between said outlet and said reservoir.
14. The combination set forth in claim 13 including a pressure release valve associated with said first-mentioned orifice means.
15. The combination comprising a hydraulic cylinder, said cylinder comprising a body having a first head at one end and a second head at the other end, a piston within said body, a shaft connected to said piston extending through said second head, means for connecting said shaft to a work member, a bracket having a surface generally complementary to the transom of a boat, means for mounting said bracket on a support, means interconnecting said bracket and said first-mentioned heat of said cylinder in a manner to permit limited relative movement therebetween, said first head having a fluid opening therein, said bracket having a fluid opening therein, said interconnecting means comprising a fluid opening providing communication between said openings, said interconnecting means between said bracket and said first head comprising an integral flange, said flange having an opening therein communicating with the openings in said bracket and said first head.
16. The combination set forth in claim 15 wherein said bracket, head and flange are made of integral plastic.
17. The combination set forth in claim 15 including a flexible wall within said body of said cylinder in the end thereof opposite the end of said piston which has said shaft extending therethrough.
18. The combination set forth in claim 17 wherein said flexible wall is generally cylindrical in shape.
19. The combination set forth in claim 17 wherein said first head is removable, said flexible wall having a portion thereof adapted to be clamped by said head against said body.
20. The combination set forth in claim 15 including controls for said cylinder comprising a pump, a reservoir, and an inlet extending from said reservoir to said pump, an outlet extending from said pump, first orifice means between said inlet and said reservoir, second orifice means between said outlet and said reservoir.
21. The combination set forth in claim 20 including a pressure release valve associated with said first-mentioned orifice means.
22. The combination comprising a hydraulic cylinder, said cylinder comprising a body having a first head at one end and a second head at the other end, a piston within said body, a shaft connected to said piston extending through said second head, means for connecting said shaft to a work member, a bracket, means for mounting said bracket on a support, means interconnecting said bracket and sAid first-mentioned head of said cylinder, said first head having a fluid opening therein, said bracket having a fluid opening therein, said interconnecting means comprising an integral flange having a fluid opening providing communication between said openings, a flexible wall within said body of said cylinder in the end thereof opposite the end of said piston which has said shaft extending therethrough.
US3756A 1970-01-19 1970-01-19 Hydraulically operated trim attachment for powerboats Expired - Lifetime US3628487A (en)

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JP (1) JPS4920435B1 (en)
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US3742893A (en) * 1972-04-14 1973-07-03 W Stelling Water-jet propulsion and steering system for a multi-section prime-mover ship
US4410193A (en) * 1979-11-14 1983-10-18 Howard D U Remotely adjustable compensator for centering steering systems
US4418931A (en) * 1979-11-14 1983-12-06 Howard D U Remotely adjustable steering compensator
US4534577A (en) * 1979-11-14 1985-08-13 Howard D U Remotely adjustable steering compensator
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JPH0462297U (en) * 1990-10-09 1992-05-28
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US6460212B2 (en) 1993-10-04 2002-10-08 Kelley Company, Inc. Dock leveler having an inflatable member
US6532889B1 (en) * 2000-07-14 2003-03-18 Tracker Marine, L.L.P. Aluminum fishing boat
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US20040221404A1 (en) * 2003-04-28 2004-11-11 Brian Bender Double-wall inflatable column assembly for a dock leveler
WO2007016805A1 (en) 2005-08-08 2007-02-15 Mueller Peter A Watercraft steering mechanism and trimmer
US20070202757A1 (en) * 2006-02-27 2007-08-30 Moore Steven C Methods and arrangements for rapid trim adjustment
EP1855015A1 (en) * 2006-05-11 2007-11-14 Besenzoni S.p.A. Linear hydraulic actuator
WO2008106807A1 (en) 2007-03-05 2008-09-12 Mueller Peter A Double trim hatch
US7503089B2 (en) 2005-04-05 2009-03-17 Rite-Hite Holding Corporation Inflatable actuator for a dock leveler deck
US7905193B2 (en) 2007-12-28 2011-03-15 Johnson Outdoors Inc. Trim tabs
CN102596709A (en) * 2009-07-20 2012-07-18 N·特里安塔菲利斯有限公司 Self contained ecological dynamic boat pitch and roll trim system by alteration of the hull water flow
WO2012097464A2 (en) 2011-01-18 2012-07-26 Mueller Peter A Stepped trim tab
US20150158554A1 (en) * 2013-10-11 2015-06-11 Mastercraft Boat Company, Llc Wake-Modifying Device for a Boat
US9260161B2 (en) 2011-11-12 2016-02-16 Malibu Boats, Llc Surf wake system for a watercraft
US9580147B2 (en) 2011-09-16 2017-02-28 Malibu Boats, Llc Surf wake system for a watercraft
US9669903B2 (en) 2014-02-04 2017-06-06 Malibu Boats, Llc Methods and apparatus for facilitating watercraft planing
US9802684B2 (en) 2013-10-11 2017-10-31 Mastercraft Boat Company, Llc Wake-modifying device for a boat
US9891620B2 (en) 2015-07-15 2018-02-13 Malibu Boats, Llc Control systems for water-sports watercraft
US10035571B1 (en) * 2016-01-15 2018-07-31 Joseph R. Langlois System for attitude control and stabilization of a marine craft
US10112688B1 (en) 2017-04-04 2018-10-30 Skier's Choice, Inc. Surf wake forming system with dual actuated trim tab
US10358189B2 (en) 2013-10-11 2019-07-23 Mastercraft Boat Company, Llc Wake-modifying device for a boat
US20190300122A1 (en) * 2016-01-15 2019-10-03 Joseph R. Langlois Transom mounted bracket for a fluid hinge trim tab system
US10676166B1 (en) 2017-04-04 2020-06-09 Skier's Choice, Inc. Surf wake forming systems and methods with gyroscope force vector translation
US11370508B1 (en) 2019-04-05 2022-06-28 Malibu Boats, Llc Control system for water sports boat with foil displacement system
US11932356B1 (en) 2020-08-24 2024-03-19 Malibu Boats, Llc Powered swim platform
US11999446B2 (en) 2021-11-29 2024-06-04 Mastercraft Boat Company, Llc Wake-modifying device for a boat

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Cited By (77)

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US3742893A (en) * 1972-04-14 1973-07-03 W Stelling Water-jet propulsion and steering system for a multi-section prime-mover ship
US4410193A (en) * 1979-11-14 1983-10-18 Howard D U Remotely adjustable compensator for centering steering systems
US4418931A (en) * 1979-11-14 1983-12-06 Howard D U Remotely adjustable steering compensator
US4534577A (en) * 1979-11-14 1985-08-13 Howard D U Remotely adjustable steering compensator
US4644893A (en) * 1984-08-06 1987-02-24 International Hydraulic Systems, Inc. Position indicating apparatus for use in a boat leveling system
US4742794A (en) * 1986-09-08 1988-05-10 Bennett Marine, Inc. Trim tab indicator system
US4854259A (en) * 1988-10-14 1989-08-08 Sta-Rite Industries, Inc. Improved trim-tab control system for power boats
US5117741A (en) * 1990-01-16 1992-06-02 Sta-Rite Industries, Inc. Double wall hydraulic cylinder
JPH0462297U (en) * 1990-10-09 1992-05-28
US5474013A (en) * 1993-03-05 1995-12-12 Trim Master Marine, Inc. Trim tab auto-retract and multiple switching device
US5621938A (en) * 1993-10-04 1997-04-22 Kelley Company, Inc. Edge-of-dock leveler and method of making
US6460212B2 (en) 1993-10-04 2002-10-08 Kelley Company, Inc. Dock leveler having an inflatable member
US6711774B2 (en) 1993-10-04 2004-03-30 Kelley Company, Inc. Dock leveler having an inflatable member
US6760944B2 (en) 1993-10-04 2004-07-13 Kelley Company, Inc. Dock leveler having an inflatable member
US20040205913A1 (en) * 1993-10-04 2004-10-21 Kelley Company, Inc. Dock leveler having an inflatable member
US6910239B2 (en) 1993-10-04 2005-06-28 Kelly Company, Inc. Dock leveler having an inflatable member
US5450643A (en) * 1993-10-04 1995-09-19 Kelley Company Inc. Edge-of-dock leveler
US5881666A (en) * 1997-06-13 1999-03-16 Crews, Jr.; L. Jeremy Watertight trim tab actuator
US6532889B1 (en) * 2000-07-14 2003-03-18 Tracker Marine, L.L.P. Aluminum fishing boat
US20040221404A1 (en) * 2003-04-28 2004-11-11 Brian Bender Double-wall inflatable column assembly for a dock leveler
US7503089B2 (en) 2005-04-05 2009-03-17 Rite-Hite Holding Corporation Inflatable actuator for a dock leveler deck
WO2007016805A1 (en) 2005-08-08 2007-02-15 Mueller Peter A Watercraft steering mechanism and trimmer
US20090101057A1 (en) * 2005-08-08 2009-04-23 Mueller Peter A Watercraft steering mechanism and trimmer
US20110120364A1 (en) * 2005-08-08 2011-05-26 Mueller Peter A Watercraft steering mechanism and trimmer
US20070202757A1 (en) * 2006-02-27 2007-08-30 Moore Steven C Methods and arrangements for rapid trim adjustment
US8216007B2 (en) * 2006-02-27 2012-07-10 Steven Clay Moore Methods and arrangements for rapid trim adjustment
EP1855015A1 (en) * 2006-05-11 2007-11-14 Besenzoni S.p.A. Linear hydraulic actuator
US8387551B2 (en) 2007-03-05 2013-03-05 Peter Müller Double trim tab
WO2008106807A1 (en) 2007-03-05 2008-09-12 Mueller Peter A Double trim hatch
US20100101475A1 (en) * 2007-03-05 2010-04-29 Peter Mueller Double trim tab
US7905193B2 (en) 2007-12-28 2011-03-15 Johnson Outdoors Inc. Trim tabs
CN102596709A (en) * 2009-07-20 2012-07-18 N·特里安塔菲利斯有限公司 Self contained ecological dynamic boat pitch and roll trim system by alteration of the hull water flow
WO2012097464A2 (en) 2011-01-18 2012-07-26 Mueller Peter A Stepped trim tab
US11572136B2 (en) 2011-09-16 2023-02-07 Malibu Boats, Llc Surf wake system for a watercraft
US10683061B2 (en) 2011-09-16 2020-06-16 Malibu Boats, Llc Surf wake system for a watercraft
US9694873B2 (en) 2011-09-16 2017-07-04 Malibu Boats, Llc Surf wake system for a watercraft
US9580147B2 (en) 2011-09-16 2017-02-28 Malibu Boats, Llc Surf wake system for a watercraft
US9914504B2 (en) 2011-09-16 2018-03-13 Malibu Boats, Llc Surf wake system for a watercraft
US9260161B2 (en) 2011-11-12 2016-02-16 Malibu Boats, Llc Surf wake system for a watercraft
US9334022B2 (en) 2011-11-12 2016-05-10 Malibu Boats, Llc Surf wake system for a watercraft
US9446823B2 (en) 2013-10-11 2016-09-20 Mastercraft Boat Company, Llc Wake-modifying device for a boat
US10266241B2 (en) 2013-10-11 2019-04-23 Mastercraft Boat Company, Llc Wake-modifying device for a boat
US9802684B2 (en) 2013-10-11 2017-10-31 Mastercraft Boat Company, Llc Wake-modifying device for a boat
US10822055B2 (en) 2013-10-11 2020-11-03 Mastercraft Boat Company, Llc Wake-modifying device for a boat
US9643697B2 (en) 2013-10-11 2017-05-09 Mastercraft Boat Company, Llc Wake-modifying device for a boat
US9174703B2 (en) * 2013-10-11 2015-11-03 Mastercraft Boat Company, Llc Wake-modifying device for a boat
US11708136B2 (en) 2013-10-11 2023-07-25 Mastercraft Boat Company, Llc Wake-modifying device for a boat
US10501156B1 (en) 2013-10-11 2019-12-10 Mastercraft Boat Company, Llc Wake-modifying device for a boat
US20150158554A1 (en) * 2013-10-11 2015-06-11 Mastercraft Boat Company, Llc Wake-Modifying Device for a Boat
US11214335B2 (en) 2013-10-11 2022-01-04 Mastercraft Boat Company, Llc Wake-modifying device for a boat
US10259534B2 (en) 2013-10-11 2019-04-16 Mastercraft Boat Company, Llc Wake-modifying device for a boat
US10899416B1 (en) 2013-10-11 2021-01-26 Mastercraft Boat Company, Llc Wake-modifying device for a boat
US10358189B2 (en) 2013-10-11 2019-07-23 Mastercraft Boat Company, Llc Wake-modifying device for a boat
US11046393B2 (en) 2013-10-11 2021-06-29 Mastercraft Boat Company, Llc Wake-modifying device for a boat
US10377453B2 (en) 2013-10-11 2019-08-13 Mastercraft Boat Company, Llc Wake-modifying device for a boat
US10179628B2 (en) 2014-02-04 2019-01-15 Malibu Boats, Llc Methods and apparatus for facilitating watercraft planing
US9669903B2 (en) 2014-02-04 2017-06-06 Malibu Boats, Llc Methods and apparatus for facilitating watercraft planing
US10386834B2 (en) 2015-07-15 2019-08-20 Malibu Boats, Llc Control systems for water-sports watercraft
US11067979B2 (en) 2015-07-15 2021-07-20 Malibu Boats, Llc Control systems for water-sports watercraft
US9891620B2 (en) 2015-07-15 2018-02-13 Malibu Boats, Llc Control systems for water-sports watercraft
US20190300122A1 (en) * 2016-01-15 2019-10-03 Joseph R. Langlois Transom mounted bracket for a fluid hinge trim tab system
US10035571B1 (en) * 2016-01-15 2018-07-31 Joseph R. Langlois System for attitude control and stabilization of a marine craft
US10994807B2 (en) * 2016-01-15 2021-05-04 Joseph R. Langlois Transom mounted bracket for a fluid hinge trim tab system
US10676166B1 (en) 2017-04-04 2020-06-09 Skier's Choice, Inc. Surf wake forming systems and methods with gyroscope force vector translation
US10202177B1 (en) 2017-04-04 2019-02-12 Skier's Choice, Inc. Surf wake forming systems and methods with primary and secondary subtabs
US10479461B1 (en) 2017-04-04 2019-11-19 Skier's Choice, Inc. Surf wake forming systems and methods with primary and secondary subtabs
US10370071B1 (en) 2017-04-04 2019-08-06 Skier's Choice, Inc. Surf wake forming systems and methods with primary and secondary subtabs
US10239591B1 (en) 2017-04-04 2019-03-26 Skier's Choice, Inc. Surf wake forming systems and methods employing primary subtab and secondary subtab
US10112688B1 (en) 2017-04-04 2018-10-30 Skier's Choice, Inc. Surf wake forming system with dual actuated trim tab
US11438751B1 (en) 2017-04-04 2022-09-06 Skier's Choice, Inc. Surf wake forming systems and methods with gyroscope force vector translation
US10858080B1 (en) 2017-04-04 2020-12-08 Skier's Choice, Inc. Surf wake forming systems and methods with gyroscope force vector translation
US11518482B1 (en) 2019-04-05 2022-12-06 Malibu Boats, Llc Water sports boat with foil displacement system
US11370508B1 (en) 2019-04-05 2022-06-28 Malibu Boats, Llc Control system for water sports boat with foil displacement system
US11851136B2 (en) 2019-04-05 2023-12-26 Malibu Boats, Llc Water sports boat with foil displacement system
US11932356B1 (en) 2020-08-24 2024-03-19 Malibu Boats, Llc Powered swim platform
US12005995B2 (en) 2021-06-14 2024-06-11 Mastercraft Boat Company, Llc Wake-modifying device for a boat
US11999446B2 (en) 2021-11-29 2024-06-04 Mastercraft Boat Company, Llc Wake-modifying device for a boat

Also Published As

Publication number Publication date
SE371405B (en) 1974-11-18
SE7316532L (en) 1973-12-06
GB1327487A (en) 1973-08-22
NO131119B (en) 1974-12-30
NO131119C (en) 1975-04-09
FR2075649A5 (en) 1971-10-08
SE383306B (en) 1976-03-08
JPS4920435B1 (en) 1974-05-24

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