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US3884171A Expired / Lapsed US ⏱️ 0.0 years remaining

Boat hull with a bottom of a portion of the surface of a hyperboloid

Assignee: Individual
•
Filing: 1973-06-01
•
Granted: 1975-05-20
•
Expires: 1993-06-01
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Abstract

Abstract A boat hull of the sea sled type is disclosed in that it has spaced chines which may be parallel or may be tapered somewhat inwardly towards the transom for the full length or a portion of the length of the hull. At least the forward part of the bottom between chines is a portion of the surface of a hyperboloid. The hyperboloid may be the simpler form which is generated by a rotating straight line or lines extending at an angle to its axis and spaced therefrom and having either a circle or an oval as its directrix. The hyperboloid surface may be that of the parabolic hyperboloid, more commonly known as a hyperbolic paraboloid, which surface is generated also by straight lines extending at angles between chines. The hyperboloid form of bottom may extend the full length of the hull or may extend for a substantial length thereof from the bow, and the rest of the bottom to the transom at the rear may take another form of surface. The transverse axis of the hyperboloid surface may be at the longitudinal center of the hull but usually it will be forward of the center to give suitable curvature for the bow and fore-bottom surface of the boat hull. There is wide latitude in the spacing of the chines, however, it is no greater than the dimension of the gorge of the simple hyperboloid surface. Preferably the rear portion of the bottom extending from the hyperboloid portion to the transom is a portion of the surface of a conoid with straight lines extending longitudinally. With a conoid form for the rear part of the bottom, the bottom edge of the transom may be straight, concave or convex. The sides and top or deck of the hull may take any desired form as well as the transom except as the bottom edge will conform to the hull bottom.

Inventors

  • 👤 John P Kline

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 13:32
CPC Classifications
B; B63; B63B; B63B1/00; B63B1/02; B63B1/04; B63B1/042

Claims Analysis

Total Claims: 23
Claim 1
Independent Claim 165 words
A boat hull comprising at least a bow, spaced sides, a bottom secured at least to the sides, a transom, and a keel line extending longitudinally and centrally of the bottom; each side having a bottom edge forming chines which are parallel or essentially parallel to each other, the bottom extending between the chines and between the bow and the transom, the bottom for at least a substantial portion of the length thereof from the bow being a double ruled surface having a gorge or saddle with a dimension and an axis, the double ruled surface being of crossed straight lines having a control angle between about 20 to 60 degrees, the chines being spaced apart a distance within the dimension of the gorge or saddle, and the axis of the gorge or saddle being located at or forwardly of the longitudinal center of the hull, and each chine and the keel line being a bola curve for the length of the double ruled surface.
Claim 2
Dependent Claim 165 words
A boat hull comprising at least a bow, spaced sides, a bottom secured at least to the sides, a transom, and a keel line extending longitudinally and centrally of the bottom; each side having a bottom edge forming chines which are parallel or essentially parallel to each other, the bottom extending between the chines and between the bow and the transom, the bottom for at least a substantial portion of the length thereof from the bow being a double ruled surface having a gorge or saddle with a dimension and an axis, the double ruled surface being of crossed straight lines having a control angle between about 20 to 60 degrees, the chines being spaced apart a distance within the dimension of the gorge or saddle, and the axis of the gorge or saddle being located at or forwardly of the longitudinal center of the hull, and each chine and the keel line being a bola curve for the length of the double ruled surface.
Claim 3
Dependent Claim 25 words
A boat hull as in claim 1 in which the double ruled surface of the bottom is a portion of the surface of a hyperboloid.
Claim 4
Dependent Claim 25 words
A boat hull as in claim 2 iN which the hyperboloid surface of the bottom is a portion of the surface of a simple hyperboloid.
Claim 5
Dependent Claim 25 words
A boat hull as in claim 2 in which the hyperboloid surface of the bottom is a portion of the surface of a parabolic hyperboloid.
Claim 6
Dependent Claim 57 words
A boat hull as in claim 2 in which the bottom from the bow for a substantial portion of the length of the hull is a portion of the surface of a hyperboloid and the bottom from the hyperboloid portion to the transom is a portion of the surface of a conoid with longitudinally extending straight lines.
Claim 7
Dependent Claim 18 words
A boat hull as in claim 5 in which the transom has a bottom edge which is straight.
Claim 8
Dependent Claim 18 words
A boat hull as in claim 5 in which the transom has a bottom edge which is convex.
Claim 9
Dependent Claim 18 words
A boat hull as in claim 5 in which the transom has a bottom edge which is concave.
Claim 10
Dependent Claim 41 words
A boat hull as in claim 5 in which the longitudinal sections of the hyperboloid surface are bola curves and the longitudinal straight lines of the conoid portion are tangent to the bola curves at the juncture of the two surfaces.
Claim 11
Dependent Claim 18 words
A boat hull as in claim 5 in which the hyperboloid surface is that of a simple hyperboloid.
Claim 12
Dependent Claim 18 words
A boat hull as in claim 5 in which the hyperboloid surface is that of a parabolic hyperboloid.
Claim 13
Dependent Claim 77 words
A boat hull as in claim 5 in which the hyperboloid portion of the bottom includes a plurality of first straight elements extending at an angle to the chines and crosswise of the bottom and a plurality of second straight elements extending at an equal but opposite angle to the chines to that of the first elements and crosswise of the bottom, and a plurality of longitudinally extending straight elements shaping the conoid portion of the bottom.
Claim 14
Dependent Claim 27 words
A boat hull as in claim 1 in which the bottom includes at least a single ply of straight elements extending at an angle to the chines.
Claim 15
Dependent Claim 21 words
A boat hull as in claim 13 including at least one straight element extending from one chine to the other chine.
Claim 16
Dependent Claim 62 words
A boat hull as in claim 1 in which the bottom includes at least one pair of plies having a first ply of straight elements extending between chines and angularly with respect thereto in one direction, and a second ply of straight elements extending at equal and opposite angles to the chines with respect to the straight elements of the first ply.
Claim 17
Dependent Claim 24 words
A boat hull as in claim 15 including at least one straight element of each ply extending from one chine to the other chine.
Claim 18
Dependent Claim 30 words
A boat hull as in claim 1 in which the bottom surface between chines forms a tunnel and the chines are spaced apart a distance to provide a deep tunnel.
Claim 19
Dependent Claim 35 words
A boat hull as in claim 17 in which the chines are spaced apart a distance approximating the lateral dimension of the gorge or saddle, and the deck line is adjacent to the keel line.
Claim 20
Dependent Claim 24 words
A boat hull as in claim 1 in which the bottom includes fabric prestressed along the crossed straight lines of the double ruled surface.
Claim 21
Dependent Claim 19 words
A boat hull as in claim 19 in which the fabric covers the entire bottom from chine to chine.
Claim 22
Dependent Claim 65 words
A boat hull as in claim 1 in which the rear portion of the bottom has chines and a bottom surface and a bottom edge for the transom of conoid form and the bottom includes fabric prestressed along crossed straight lines for the double ruled surface, and fabric prestressed along the longitudinally extending lines of a conoid surface for the rear portion of the bottom.
Claim 23
Dependent Claim 19 words
A boat hull as in claim 21 in which the fabric covers the entire bottom from chine to chine.

References Cited (Backward Citations)

US933426A Cited
US2366590A Cited
US2662237A Cited
US3072929A Cited
US3444568A Cited
US3749594A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-05-19 1978-11-18 1979-05-20 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-05-19 1982-11-18 1983-05-20 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-05-19 1986-11-18 1987-05-20 $7700.00 Window Closed / Lapsed

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