US3628485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Planing boat with stepped hull
Assignee: Individual
•
Filing: 1969-09-24
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Granted: 1971-12-21
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Expires: 1989-09-24
Abstract
Abstract A planing boat having a step near the stern, with the bottom aft of the step normally out of water. The boat is provided with one or more trim flaps attached along their forward edges to the portion of the hull bottom which is forward of and adjacent the step, with the flaps extending aft of the step. A control member for adjusting each flap extends upwardly from the upper surface of the flap through the hull bottom portion which is aft of the step. One or more rudder shafts extend through the hull bottom aft of the flaps and carry rudders with the relatively thick upper portions of the rudders where they join the rudder shafts disposed at a level generally above the level of the after or trailing edges of the flap or flaps. One or more propeller shaft struts may be connected to the after hull bottom portion with the relatively thick upper mounting portions of the struts under the hull bottom being generally above the level of the after edges of the flaps.
Inventors
- 👤 John D Gill
- 👤 James R Wynne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:06
CPC Classifications
B; B63; B63B; B63B39/00; B63B39/06; B63B39/061; B63B1/00; B63B1/16; B63B1/18; B63B1/20; B63B2001/202
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
204 words
In a planing inboard motor boat, a hull including a bow, a stern transom, a bottom having a lateral step located spacedly forward of the transom and in the after quarter of the hull, said bottom having a major portion forward of said step constituting the major planing support for the boat, the raised bottom portion of the hull aft of the step being out of water when the boat is operating at planing speeds in a straight ahead direction, a rudder and a rudder shaft located aft of said step and forward of said transom, said rudder comprising a streamlined lower steering portion and an upper attachment portion joined to said rudder shaft, said attachment portion being thicker than and shorter in its vertical dimension than said lower portion, said post extending upwardly from said attaChment portion through said raised bottom portion adjacently rearward of said step with said attachment portion closely underlying said raised bottom portion behind said step, the height dimension of said step being at least substantially as great as the distance between said raised bottom portion and the lower parts of said attachment portion whereby the drag of said rudder shaft and attachment portion is minimized at planing speeds.
Claim 2
Dependent Claim
204 words
In a planing inboard motor boat, a hull including a bow, a stern transom, a bottom having a lateral step located spacedly forward of the transom and in the after quarter of the hull, said bottom having a major portion forward of said step constituting the major planing support for the boat, the raised bottom portion of the hull aft of the step being out of water when the boat is operating at planing speeds in a straight ahead direction, a rudder and a rudder shaft located aft of said step and forward of said transom, said rudder comprising a streamlined lower steering portion and an upper attachment portion joined to said rudder shaft, said attachment portion being thicker than and shorter in its vertical dimension than said lower portion, said post extending upwardly from said attaChment portion through said raised bottom portion adjacently rearward of said step with said attachment portion closely underlying said raised bottom portion behind said step, the height dimension of said step being at least substantially as great as the distance between said raised bottom portion and the lower parts of said attachment portion whereby the drag of said rudder shaft and attachment portion is minimized at planing speeds.
Claim 3
Dependent Claim
60 words
The combination according to claim 1 and a trim flap having a forward portion aligned and faired with and attached to said bottom forward of said step and an after portion extending aft of said step, and means behind said step and attached to said after portion for controlling said flap to adjust the longitudinal planing trim of said boat.
Claim 4
Dependent Claim
30 words
The combination according to claim 1 wherein said step is of ''''V'''' shape in plan and spaced further from said transom amidships than adjacent the outer ends of the step.
Claim 5
Dependent Claim
33 words
The combination according to claim 3 wherein the hull comprises chines meeting the transom, and the outer ends of the step meet the chines substantially at the respective intersections thereof with the transom.
Claim 6
Dependent Claim
32 words
The combination according to claim 4 wherein the stern portion of the bottom of the hull is of V shape characterized by a dead rise angle of between approximately 4* and 30*.
Claim 7
Dependent Claim
58 words
The combination according to claim 2 wherein the trim flap comprises two separate sections divided along the centerline of the hull, each of said section being provided with individually operable such controlling means, and said rudder being to one side of said centerline and matched to a second rudder similarly arranged on the other side of the centerline.
Claim 8
Dependent Claim
30 words
The combination according to claim 6 wherein said major portion of said hull bottom is of deep V shape characterized by a dead rise of between substantially 20 to 30*.
Claim 9
Dependent Claim
164 words
In a planing inboard motorboat, a hull including a bow, a stern transom, and a bottom, a lateral step located spacedly forward of the transom and in the afterquarter of the hull, said bottom having a major portion forward of said step constituting the major planing support for the boat, the raised bottom portion of the hull aft of the step being out of water when the boat is operating at planing speeds in a straight ahead direction, said step being of ''''V'''' shape in plan and spaced further from said transom amidships than adjacent the outer ends of the step, a respective trim flap disposed on each side of amidships, each said flap having a forward edge aligned and faired with and attached to said bottom forwardly of said step and an after portion extending aft of said step, and means disposed aft of said step and attached to said after portions for controlling said flaps to adjust the trim of said boat.
Claim 10
Dependent Claim
164 words
In a planing inboard motorboat, a hull including a bow, a stern transom, and a bottom, a lateral step located spacedly forward of the transom and in the afterquarter of the hull, said bottom having a major portion forward of said step constituting the major planing support for the boat, the raised bottom portion of the hull aft of the step being out of water when the boat is operating at planing speeds in a straight ahead direction, said step being of ''''V'''' shape in plan and spaced further from said transom amidships than adjacent the outer ends of the step, a respective trim flap disposed on each side of amidships, each said flap having a forward edge aligned and faired with and attached to said bottom forwardly of said step and an after portion extending aft of said step, and means disposed aft of said step and attached to said after portions for controlling said flaps to adjust the trim of said boat.
Claim 11
Dependent Claim
57 words
The combination according to claim 8 wherein said control means comprise a respective control rod for each flap extending and movable generally vertically through said bottom and wherein each said rod is provided with a respective attachment means joining the lower end of the rod to its respective said flap at the upper surface of the flap.
Claim 12
Dependent Claim
31 words
The combination according to claim 8 wherein said hull is provided with two propellers each disposed under and having its turning circle below the lower surface of a respective said flap.
Claim 13
Dependent Claim
33 words
The combination according to claim 8 wherein said major portion of the bottom of the hull is of deep V shape characterized by a dead rise angle of between substantially 20 and 30*.
Claim 14
Dependent Claim
185 words
In a planing inboard motor boat, a hull including a bow, a stern transom, and a bottom having a lateral step located spacedly forward of the transom and in the afterquarter of the hull, the said bottom having a major portion forward of said step constituting the major planing support for the boat, the raised bottom portion of the hull aft of the step being out of water when the boat is operating at planing speeds in a sTraight ahead direction, a trim flap having a forward edge portion aligned and faired with and swingably attached to said major portion of said bottom and an afterportion extending aft of said step, control means for trimming said flap, said hull being provided with a propeller shaft passing through said major portion of the hull bottom, a propeller on said shaft, a strut mounted to said raised bottom portion rearward of said flap and of said propeller, a bearing in said strut coaxial with said shaft, a journal in said bearing rigid with and coaxial with said shaft, said bearing providing shaft support rearwardly of said propeller.
Claim 15
Dependent Claim
185 words
In a planing inboard motor boat, a hull including a bow, a stern transom, and a bottom having a lateral step located spacedly forward of the transom and in the afterquarter of the hull, the said bottom having a major portion forward of said step constituting the major planing support for the boat, the raised bottom portion of the hull aft of the step being out of water when the boat is operating at planing speeds in a sTraight ahead direction, a trim flap having a forward edge portion aligned and faired with and swingably attached to said major portion of said bottom and an afterportion extending aft of said step, control means for trimming said flap, said hull being provided with a propeller shaft passing through said major portion of the hull bottom, a propeller on said shaft, a strut mounted to said raised bottom portion rearward of said flap and of said propeller, a bearing in said strut coaxial with said shaft, a journal in said bearing rigid with and coaxial with said shaft, said bearing providing shaft support rearwardly of said propeller.
Claim 16
Dependent Claim
54 words
The combination according to claim 11 wherein a rudder member is hingedly connected to said strut and extends aftwardly therefrom, said rudder being provided with a rudder shaft extending upwardly therefrom through said raised bottom portion and terminating inwardly of said hull, and steering means disposed inwardly of the hull for rotating said shaft.
Claim 17
Dependent Claim
19 words
The combination according to claim 8 wherein said raised bottom portion extends aft of the afteredges of said flaps.
References Cited (Backward Citations)
US1413383A
Cited
US3399643A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |