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US3789790A
Expired / Lapsed
US
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System for reefing and furling sails
Assignee: Individual
•
Filing: 1973-06-01
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Granted: 1974-02-05
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Expires: 1993-06-01
Abstract
Abstract Spool sections are rotatably mounted on the jib stay. Each section is formed of two identical halves which are fixed together by screws or clips. The two parts in cross-section are formed with a central hole which receives the stay. A bore is formed on one side and connected to the exterior by a first slot. A smaller second bore has a second slot to the exterior. The luff of a sail and its luff rope fit in one large bore, the luff extending out the first slot. The luff rope extends up over a pulley in a crown block above the highest spool section, then down through the first bore on the opposite half. Thus the sail may be rapidly installed. Pins fit into the second bores of adjacent spool sections, holding them for rotation together. A drum consisting of two sections screwed together and fixed to the lowermost spool section receives a furling line used to revolve the spool sections and furl or reef the sail.
Inventors
- 👤 D Crall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:43
CPC Classifications
B; B63; B63H; B63H9/00; B63H9/04; B63H9/08; B63H9/10; B63H9/1021; B63H9/1028
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
175 words
A system for furling a staysail comprising a plurality of spool sections, each section formed of two substantially identical halves, each said half viewed in transverse crosssection having parallel, offset parting edges with an arcuate groove at the intersection of said edges to provide in the assembled spool section a central opening dimensioned to fit loosely around a stay on which the system is installed, cooperating first means on said halves to hold said halves together in alignment in assembled position, each of said halves having a bore, a slot extending radially from each of said bores to the exterior of said halves, said bore of said first half receiving the luff of a sail and a luff rope within said luff, said slot of said first half receiving the edge of said sail, second means for connecting said sections end-to-end on a stay and for rotation in unison with the bores of said sections in alignment, and third means for rotating said sections about a stay to furl said sail about said spool sections.
Claim 2
Independent Claim
175 words
A system for furling a staysail comprising a plurality of spool sections, each section formed of two substantially identical halves, each said half viewed in transverse crosssection having parallel, offset parting edges with an arcuate groove at the intersection of said edges to provide in the assembled spool section a central opening dimensioned to fit loosely around a stay on which the system is installed, cooperating first means on said halves to hold said halves together in alignment in assembled position, each of said halves having a bore, a slot extending radially from each of said bores to the exterior of said halves, said bore of said first half receiving the luff of a sail and a luff rope within said luff, said slot of said first half receiving the edge of said sail, second means for connecting said sections end-to-end on a stay and for rotation in unison with the bores of said sections in alignment, and third means for rotating said sections about a stay to furl said sail about said spool sections.
Claim 3
Dependent Claim
47 words
A system according to claim 1 in which said first means comprises a tongue on one said parting edge and a complementary groove on the other said parting edge, the tongue of one half fitting into the grooves in the other half when said halves are assembled.
Claim 4
Dependent Claim
22 words
A system according to claim 2 in which said first means further comprises fastening means fastening said halves together in assembled position.
Claim 5
Dependent Claim
118 words
A system according to claim 1 which further comprises a crown block having means for securing said crown block to the top of the uppermost spool section and formed to receive said stay and rotate about said stay in unison with said spool sections, said crown block further formed with a passage communicating with said bores of both said halves of said uppermost spool section, a pulley, and means rotatably mounting said pulley in said passage, a luff rope in the bore of one said half extending beyond the top of said sail and passing over said pulley and down the bore of the second said half, whereby said luff rope may be pulled to hoist said sail.
Claim 6
Dependent Claim
117 words
A system according to claim 4 which further comprises a first window in a first half of the lowermost said spool section and a second window in the second half of said lowermost spool section whereby the top of said sail may be inserted in said first window and the end of said luff rope remote from said sail may be pulled out through said second window, means securing said luff rope at the bottom of said sail to said first half of said lowermost spool section adjacent said first window and means securing the end of said luff rope remote from said sail to said second half of said lowermost spool section adjacent said second window.
Claim 7
Dependent Claim
32 words
A system according to claim 1 in which said third means comprises a drum fixed for rotation with the lowermost of said spool sections and a furling line wrapped around said drum.
Claim 8
Dependent Claim
39 words
A system according to claim 6 in which said drum comprises two drum halves each formed with a groove to fit around said spool and top and bottom flanges and fastening means to detachably hold said drum halves together.
Claim 9
Dependent Claim
30 words
A system according to claim 7 which further comprises a furling rope guide having means to fix said guide to said stay and a radial arm for said furling roPe.
Claim 10
Dependent Claim
39 words
A system according to claim 1 in which each said half is formed with a second bore offset from said first-mentioned bore and in which said second means comprise pins fitting into the second bores of adjacent spool sections.
Claim 11
Dependent Claim
84 words
A system according to claim 9 in which each said half is formed with a second slot extending radially from said second bore to the exterior of said half and is also formed with an external step having a locking surface substantially parallel to said parting edges and in which said cooperating first means comprises a plurality of metal clips each engaging the locking surface of one said half and the second slot of the other half and bridging the joint between said halves.
References Cited (Backward Citations)
US2107307A
Cited
US3611969A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |