Patent US5406904A successfully refreshed from Google Patents.
US5406904A
Expired / Lapsed
US
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Ladder and attachment for water ski
Assignee: Yamaha Motor Co Ltd
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Filing: 1993-08-31
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Granted: 1995-04-18
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Expires: 2013-08-31
Abstract
Abstract Several embodiments of watercraft having a forwardly positioned propulsion unit and a seating area with a combined boarding ladder and tow rope attachment that is slidably supported for storage in a cavity or recess beneath the seat. The tow rope portion of the boarding ladder is defined by an arcuate slot adapted to receive a roller for attachment to the tow rope with the center of curvature being positioned forwardly of the seat.
Inventors
- 👤 Noboru Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:16
CPC Classifications
B; B63; B63B; B63B1/00; B63B1/02; B63B1/04; B63B1/042; B63B1/16; B63B1/18; B63B27/00; B63B27/14; B63H; B63H11/00; B63H11/02; B63H21/00
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
106 words
A watercraft having a hull defining a passengers area having a raised central area containing a seat bounded on its sides by lower foot areas, a transom at the rear of said hull, the raised portion of said seat defining a longitudinally extending recess beneath said seat and ending contiguous to said transom, a boarding ladder movably supported within said recess from a horizontally disposed storage position within said recess and a boarding position extending vertically downwardly of said transom, said ladder when in said boarding position facilitating entry of said watercraft by a person from a body of water in which the watercraft is operating.
Claim 2
Dependent Claim
106 words
A watercraft having a hull defining a passengers area having a raised central area containing a seat bounded on its sides by lower foot areas, a transom at the rear of said hull, the raised portion of said seat defining a longitudinally extending recess beneath said seat and ending contiguous to said transom, a boarding ladder movably supported within said recess from a horizontally disposed storage position within said recess and a boarding position extending vertically downwardly of said transom, said ladder when in said boarding position facilitating entry of said watercraft by a person from a body of water in which the watercraft is operating.
Claim 3
Dependent Claim
45 words
A watercraft having a hull as set forth in claim 1 wherein the boarding ladder is slidably supported within the recess and is also pivotal at one of its ends within the recess for movement from the horizontally disposed position to the vertically disposed position.
Claim 4
Dependent Claim
21 words
A watercraft having a hull as set forth in claim 2 wherein the sides of the boarding ladder have hinged portions.
Claim 5
Dependent Claim
26 words
A watercraft having a hull as set forth in claim 1 wherein the sides of the foot areas are opened through the transom of the watercraft.
Claim 6
Dependent Claim
45 words
A watercraft having a hull as set forth in claim 1 wherein the boarding ladder is slidably supported within the recess and is also pivotal at one of its ends within the recess for movement from the horizontally disposed position to the vertically disposed position.
Claim 7
Dependent Claim
21 words
A watercraft having a hull as set forth in claim 5 wherein the sides of the boarding ladder have hinged portions.
Claim 8
Dependent Claim
37 words
A watercraft having a hull as set forth in claim 1 wherein the boarding ladder further provides means for attaching a tow rope for towing a water skier when the boarding ladder is in a storage position.
Claim 9
Dependent Claim
37 words
A watercraft having a hull as set forth in claim 1 wherein the recess comprises a pair of channels extending along opposite sides of the seat in which side portions of the boarding ladder are slidably received.
Claim 10
Dependent Claim
29 words
A watercraft having a hull as set forth in claim 8 further including stops positioned in the channels for limiting the degree of rearward movement of the boarding ladder.
Claim 11
Dependent Claim
43 words
A watercraft having a hull as set forth in claim 9 wherein the boarding ladder is slidably supported within the recess and is also pivotal at its ends within the channels for movement from the horizontally disposed position to the vertically disposed position.
Claim 12
Dependent Claim
21 words
A watercraft having a hull as set forth in claim 10 wherein the sides of the boarding ladder have hinged portions.
Claim 13
Dependent Claim
131 words
A watercraft having a hull defining a passengers area having a raised central area containing a seat bounded on its sides by lower foot areas, a transom at the rear of said hull, the raised portion of said seat defining a recess ending contiguous to said transom, a boarding ladder movably supported within said recess from a storage position within said recess and a boarding position extending rearwardly of said transom, said ladder when in said boarding position facilitating entry of said watercraft by a person from a body of water in which the watercraft is in operation, said boarding ladder further providing means for attaching a tow rope comprising means defining a curved slot and a roller supported within said slot and adapted to be connected to a tow rope.
Claim 14
Dependent Claim
131 words
A watercraft having a hull defining a passengers area having a raised central area containing a seat bounded on its sides by lower foot areas, a transom at the rear of said hull, the raised portion of said seat defining a recess ending contiguous to said transom, a boarding ladder movably supported within said recess from a storage position within said recess and a boarding position extending rearwardly of said transom, said ladder when in said boarding position facilitating entry of said watercraft by a person from a body of water in which the watercraft is in operation, said boarding ladder further providing means for attaching a tow rope comprising means defining a curved slot and a roller supported within said slot and adapted to be connected to a tow rope.
Claim 15
Dependent Claim
28 words
A watercraft having a hull as set forth in claim 12 wherein the center of curvature of the slot is positioned forwardly of the end of the seat.
Claim 16
Dependent Claim
45 words
A watercraft having a hull as set forth in claim 13 wherein the boarding ladder is slidably supported within the recess and is also pivotal of one of its ends within the recess for movement from a horizontally disposed position to a vertically disposed position.
Claim 17
Dependent Claim
21 words
A watercraft having a hull as set forth in claim 14 wherein the sides of the boarding ladder have hinged portions.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-04-17 | 1998-10-17 | 1999-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-04-17 | 2002-10-17 | 2003-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-04-17 | 2006-10-17 | 2007-04-18 | $7700.00 | Window Closed / Lapsed |