Patent US4720280A successfully refreshed from Google Patents.
US4720280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wave ski
Assignee: Individual
•
Filing: 1986-06-04
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Granted: 1988-01-19
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Expires: 2006-06-04
Abstract
Abstract An improvement to a wave ski comprising an adjustable seat which slides longitudinally along a track located on the upper surface of the wave ski and a fin associated with the seat, whereby the user can simultaneously adjust the longitudinal position of the seat by the use of footrests and the fin on the wave ski. In another embodiment of the invention, the adjustable seat which moves longitudinally along a track located on the upper surface of the wave ski and the fin associated with the seat includes a slot extending longitudinally along or adjacent to the center line of the wave ski and is adapted to receive the fin or portion of the seat, whereby the user can again simultaneously adjust the longitudinal position of the seat and fin on the wave ski.
Inventors
- 👤 Ernest Hufnagl
- 👤 Christopher J. Fields
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:36
CPC Classifications
B; B63; B63B; B63B32/00; B63B32/60; B63B32/64; B63B32/66
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
116 words
A wave ski comprising: a floatation hull having a lower hull surface, a track means connected to and extending longitudinally relative to said floatation hull, a user seat moveable by the wave ski user on said track means longitudinally along said floatation hull, a movable fin having a fin tip extending generally below said lower hull surface, said movable fin being secured to said user seat and movable therewith relative to said floatation hull so that the user can simultaneously reposition said user seat and said movable fin relative to said floatation hull, and a fixed fin fixed to said floatation hull at the aft portion thereof and extending generally down from said lower hull surface.
Claim 2
Dependent Claim
116 words
A wave ski comprising: a floatation hull having a lower hull surface, a track means connected to and extending longitudinally relative to said floatation hull, a user seat moveable by the wave ski user on said track means longitudinally along said floatation hull, a movable fin having a fin tip extending generally below said lower hull surface, said movable fin being secured to said user seat and movable therewith relative to said floatation hull so that the user can simultaneously reposition said user seat and said movable fin relative to said floatation hull, and a fixed fin fixed to said floatation hull at the aft portion thereof and extending generally down from said lower hull surface.
Claim 3
Dependent Claim
53 words
the wave ski of claim 1 including, a fixing means for fixing said movable fin to the under surface of said user seat substantially in the center thereof, and said floatation hull including a longitudinal slot through said lower hull surface and through which said movable fin extends and in which it travels.
Claim 4
Dependent Claim
31 words
The wave ski of claim 2 including, said fixing means including a fin box positioned in the base of said user seat and into which said movable fin can be inserted.
Claim 5
Dependent Claim
15 words
The wave ski of claim 2 including, said fixing means including a plurality of screws.
Claim 6
Dependent Claim
14 words
The wave ski of claim 1 including, said track means including a U-shaped channel.
Claim 7
Dependent Claim
14 words
The wave ski of claim 1 including, said track means including a T-shaped channel.
Claim 8
Dependent Claim
53 words
The wave ski of claim 1 including, a plurality of steps spaced longitudinally along said floatation hull defining a plurality of user foot rests to accommodate the different positions of the feet of the user seated on said user seat dependent on the position of said user seat relative to said floatation hull.
Claim 9
Dependent Claim
22 words
The wave ski of claim 1 including, said floatation hull including a receiving means for receiving a wind surfing mast and sail.
Claim 10
Dependent Claim
58 words
A wave ski comprising: a hull, a seat adapted to move longitudinally along said hull, said hull defining a slot extending longitudinally therealong, and a fin operatively associated with said seat through said slot such that a user of the wave ski can simultaneously adjust the longitudinal positions of said fin and said seat relative to said hull.
Claim 11
Dependent Claim
58 words
A wave ski comprising: a hull, a seat adapted to move longitudinally along said hull, said hull defining a slot extending longitudinally therealong, and a fin operatively associated with said seat through said slot such that a user of the wave ski can simultaneously adjust the longitudinal positions of said fin and said seat relative to said hull.
Claim 12
Dependent Claim
18 words
The wave ski of claim 9 including, said slot extending longitudinally along the center line of said hull.
Claim 13
Dependent Claim
16 words
The wave ski of claim 9 including, said slot receiving a portion of said seat therein.
Claim 14
Dependent Claim
18 words
The wave ski of claim 11 including, said slot extending longitudinally along the center line of said hull.
Claim 15
Dependent Claim
13 words
The wave ski of claim 9 including, said slot receiving said fin therein.
Claim 16
Dependent Claim
21 words
The wave ski of claim 13 including, a fixing means for fixing said fin to the under surface of said seat.
Claim 17
Dependent Claim
29 words
The wave ski of claim I4 including, said fixing means comprising a fin box positioned in the base of said seat and into which said fin can be inserted.
Claim 18
Dependent Claim
30 words
The wave ski of claim 9 including, a fixed fin fixed to said hull at an aft portion thereof and extending generally down from the lower surface of said hull.
Claim 19
Dependent Claim
34 words
The wave ski of claim 9 including, said hull having a pair of opposed sides and a lower hull surface disposed between said opposite sides, and said slot passing through said lower hull surface.
Claim 20
Dependent Claim
28 words
The wave ski of claim 9 including, said fin being disposed directly beneath said seat and fixed in position along its entire fin length relative to said seat.
Claim 21
Dependent Claim
26 words
The wave ski of claim 9 including, a means at the base of said seat into which said fin can be inserted and locked into place.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-01-18 | 1991-07-20 | 1992-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-18 | 1995-07-20 | 1996-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-18 | 1999-07-20 | 2000-01-19 | $7700.00 | Window Closed / Lapsed |