Patent US1573273A successfully refreshed from Google Patents.
Patent US3885512A successfully refreshed from Google Patents.
US3885512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catamaran structure
Assignee: Individual
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Filing: 1974-07-15
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Granted: 1975-05-27
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Expires: 1994-07-15
Abstract
Abstract A catamaran structure that includes a longitudinally extending, intermediately positioned, elongate rigid member of circular transverse cross section that pivotally supports a tubular sleeve thereon. The sleeve serves as a support for a sail carrying mast that extends upwardly therefrom, and a keel structure that depends downwardly therefrom. The center of gravity of the keel structure and the weight of the keel structure are so related to the height of the mast and the area of the sail carried thereon, that the mast and sail will tilt laterally to port or starboard when the catamaran is wind driven, but without tilting the pontoons of the catamaran and the user supported structure situated therebetween. The relationship of the keep and mast structure above described is preferably such that the mast can tilt in the strongest wind that will normally be encountered, but without this tilting being sufficient to move the lowermost portion of the keel structure into contact with the catamaran to result in the overturn of the latter.
Inventors
- 👤 Paul M Marcil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:36
CPC Classifications
B; B63; B63B; B63B41/00; B63B15/00; B63B15/02; B63B2015/0016; B63B2015/005; B63B2015/0066; B63B35/00; B63B2035/009; B63B39/00; B63B39/06; B63B2039/065
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
277 words
In a catamaran that includes a pair of laterally spaced parallel pontoons, a plurality of spaced cross pieces secured to said pontoons to maintain them in a fixed spaced relationship, a mast having a first end, a sail supported from sail mast, a rudder pivotally supported in a fixed position relative to said pontoons, a support for a user of said catamaran intermediately disposed between said pontoons, the improvement for so supporting said mast and sail that said pontoons, support and cross pieces remain substantially horizontal when said catamaran is wind propelled, said improvement comprising: a. a rigid elongate member secured to said cross-pieces and normally disposed thereto, said member of circular transverse cross section; b. a pair of longitudinally spaced collars adjustably secured to said rigid member; c. a tubular sleeve pivotally supported from said elongate member and disposed between said collars; d. first means for rigidly connecting said first end of said mast to said sleeve for said mast to extend upwardly therefrom; and e. a keel weight f. a rigid downwardly extending keel member that has first and second ends, said first end of said keel member secured to said sleeve and said second end to said keel weight, with the magnitude of said keel weight and the distance between said first and second ends of said keel member being so related to the height of said mast and the area of said sail that said mast and sail will pivot downwardly and outwardly and said keel member and keel weight upwardly and outwardly as said catamaran is subjected to wind without said pontoons crosspieces and support being appreciably displaced from a horizontal position.
Claim 2
Dependent Claim
277 words
In a catamaran that includes a pair of laterally spaced parallel pontoons, a plurality of spaced cross pieces secured to said pontoons to maintain them in a fixed spaced relationship, a mast having a first end, a sail supported from sail mast, a rudder pivotally supported in a fixed position relative to said pontoons, a support for a user of said catamaran intermediately disposed between said pontoons, the improvement for so supporting said mast and sail that said pontoons, support and cross pieces remain substantially horizontal when said catamaran is wind propelled, said improvement comprising: a. a rigid elongate member secured to said cross-pieces and normally disposed thereto, said member of circular transverse cross section; b. a pair of longitudinally spaced collars adjustably secured to said rigid member; c. a tubular sleeve pivotally supported from said elongate member and disposed between said collars; d. first means for rigidly connecting said first end of said mast to said sleeve for said mast to extend upwardly therefrom; and e. a keel weight f. a rigid downwardly extending keel member that has first and second ends, said first end of said keel member secured to said sleeve and said second end to said keel weight, with the magnitude of said keel weight and the distance between said first and second ends of said keel member being so related to the height of said mast and the area of said sail that said mast and sail will pivot downwardly and outwardly and said keel member and keel weight upwardly and outwardly as said catamaran is subjected to wind without said pontoons crosspieces and support being appreciably displaced from a horizontal position.
Claim 3
Dependent Claim
42 words
A catamaran as defined in claim 1, which in addition includes: f. first means for slidably adjusting said collars to selected longitudinal positions on said elongate member to locate said mast and sleeve at a desired longitudinal position relative to said pontoon.
Claim 4
Dependent Claim
58 words
A catamaran as defined in claim 1 in which keel member includes the distance between the center of gravity of said weight and the centerline about which said sleeve pivots being so selected that said weight does not pivot upwardly to contact one of said pontoons in the strongest wind to which said catamaran will normally be subjected.
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) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |