US3827096A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water ski construction
Assignee: Individual
•
Filing: 1972-12-04
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Granted: 1974-08-06
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Expires: 1992-12-04
Abstract
Abstract A water ski construction wherein the lower surface of the ski is smoothly contoured in the forward zone, the ski contains a double channel in the mid zone with the channels being separated by a longitudinal convex ridge, the height of the ridge in the mid zone being less than the height of the edges of the ski, the aft zone of the ski being tapered and also being smoothly contoured, a fin may be provided in the aft zone for lateral stability.
Inventors
- 👤 I Brownson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:13
CPC Classifications
B; B63; B63B; B63B32/00; B63B32/30; B63B32/50
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
192 words
A water ski construction comprising: a narrow elongated element being divided in the longitudinal direction into a fore zone, a mid-zone and a aft zone, the lower surface of said element being adapted to contact the water; said mid-zone over at least a portion thereof having a cross section in which said lower surface comprises first and second concave longitudinal channels separated by a longitudinally convex ridge, sAid ridge being equidistantly spaced from the edges of said element and being less in height than the edges of said element within said mid-zone portion to distribute water between said channels for stability, at least one of said channels being within the water during a turn in either direction, said aft zone being laterally tapered inwardly toward the longitudinal center axis of said element to reduce the transverse width of said element at said aft zone; said element being progressively reduced in thickness within said fore and aft zones by at least the depth of said channels thereby eliminating said channels and ridge within said fore and aft zones, said fore and aft zones being substantially flat and said fore zone being turned upwardly.
Claim 2
Dependent Claim
192 words
A water ski construction comprising: a narrow elongated element being divided in the longitudinal direction into a fore zone, a mid-zone and a aft zone, the lower surface of said element being adapted to contact the water; said mid-zone over at least a portion thereof having a cross section in which said lower surface comprises first and second concave longitudinal channels separated by a longitudinally convex ridge, sAid ridge being equidistantly spaced from the edges of said element and being less in height than the edges of said element within said mid-zone portion to distribute water between said channels for stability, at least one of said channels being within the water during a turn in either direction, said aft zone being laterally tapered inwardly toward the longitudinal center axis of said element to reduce the transverse width of said element at said aft zone; said element being progressively reduced in thickness within said fore and aft zones by at least the depth of said channels thereby eliminating said channels and ridge within said fore and aft zones, said fore and aft zones being substantially flat and said fore zone being turned upwardly.
Claim 3
Dependent Claim
38 words
A water ski construction as defined in claim 1 wherein each of said channels being approximately equal in size and smoothly contoured into a surface formed by a solid of revolution, said ridge having a smoothly contoured surface.
Claim 4
Dependent Claim
36 words
A water ski construction as defined in claim 2, the conbined width of said channels being just slightly less than the width of said narrow elongated element, said channels being of greater length than said ridge.
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) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |