US3749043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for reefing and furling staysails
Assignee: Individual
•
Filing: 1971-11-15
•
Granted: 1973-07-31
•
Expires: 1991-11-15
Abstract
Abstract Spool sections are rotatably mounted on the stay for the sail. Tongue and groove connections cause the sections to rotate in unison. The luff of the sail is received in a longitudinal slot which is located aligned in each section. A drum is attached to the lowermost section and a furling line wound on the drum. By pulling the furling line and releasing the sheet (corner rope) of the sail, the sail may be wound on the spool sections and furled. Reverse of the operation unfurls the sail. By stopping the furling or unfurling operation at an intermediate position, the sail may be reefed to any desired extent.
Inventors
- 👤 D Crall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:48
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
113 words
A system for furling a staysail comprising a plurality of spool sections, each said section formed with a longitudinally extending central aperture to receive a stay and a longitudinally extending slot extending inward from the periphery to the central axis of said section along the length of said section to receive an edge of a sail, first means for rotatably mounting said sections end-to-end on a stay to rotate in unison with said openings of said sections in alignment, second means for fastening said edge of a sail to each of said sections along the length of said section, and third means for rotating said sections about said stay to furl said sail.
Claim 2
Independent Claim
113 words
A system for furling a staysail comprising a plurality of spool sections, each said section formed with a longitudinally extending central aperture to receive a stay and a longitudinally extending slot extending inward from the periphery to the central axis of said section along the length of said section to receive an edge of a sail, first means for rotatably mounting said sections end-to-end on a stay to rotate in unison with said openings of said sections in alignment, second means for fastening said edge of a sail to each of said sections along the length of said section, and third means for rotating said sections about said stay to furl said sail.
Claim 3
Dependent Claim
33 words
A system according to claim 1 in which the ends of said sections are formed with mating tongues and grooves, whereby torque applied to one said section is transmitted to the next section.
Claim 4
Dependent Claim
24 words
A system according to claim 1 in which said longitudinal slot is dimensioned to accept said stay, said slot also forming said central aperture.
Claim 5
Dependent Claim
28 words
A system according to claim 3 which further comprises strips fitting into said slot and locking a stay inserted into the inner end of said slot against removal.
Claim 6
Dependent Claim
23 words
A system according to claim 4 in which at least one said locking strip is inserted in the slots of two adjacent sections.
Claim 7
Dependent Claim
41 words
A system according to claim 3 in which said second means comprises a plurality of pins driven into each said section and positioned to pass across said slot to pin in place the edge of a sail inserted in said slot.
Claim 8
Dependent Claim
31 words
A system according to claim 1 in which said third means comprises a drum fixed for rotation with the lowermost of said sections and a furling line wrapped on said drum.
Claim 9
Dependent Claim
21 words
A system according to claim 7 in which said drum comprises upper and lower flanges and a spacer between said flanges.
Claim 10
Dependent Claim
41 words
A system according to claim 8 in which each said flange is formed with a radial slot to receive a stay and said spacer is split to permit installation on said stay and which further comprises means to fill said slots.
Claim 11
Dependent Claim
22 words
A system according to claim 1 in which at least one said section has a greater circumference than others of said sections.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |