Patent US3835804A successfully refreshed from Google Patents.
US3835804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sail furling
Assignee: Individual
•
Filing: 1973-02-01
•
Granted: 1974-09-17
•
Expires: 1993-02-01
Abstract
Abstract In a sailboat having a mast, a boom, and a sail furlable upon an upright wind-up member such as a rotatable cable to which the luff of the sail is affixed, the improvement wherein the mast comprises a rigid shell providing a vertically disposed interior chamber having an extended vertical opening therein facing aft the wind-up member being disposed within the chamber and the edges of the opening furnishing lengthwise support to the luff of the sail at all boom positions.
Inventors
- 👤 P Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:00
CPC Classifications
B; B63; B63H; B63H9/00; B63H9/04; B63H9/08; B63H9/10; B63H9/1021; B63H9/1035
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
183 words
In a sailboat having a conventional stayed mast which in use is essentially stationary, vertical and stepped on the center line of the boat, a sail, a rotatable wind-up member supported by the mast and to which the luff of the sail is made fast and on which the sail may be furled and unfurled by appropriate rotation thereof as the sail is hauled out or retracted, the improvement wherein said wind-up member is flexible, the mast is provided with a longitudinally extending aft-facing slotted recess within which said wind-up member is housed and through the opening of which the sail is hauled out and retracted, said wind-up member with said luff attached having a diameter greater than the width of said opening so as to be held therein by engagement with the edges of said opening, the walls of said recess providing support for said wind-up member to keep it in contact with the mast during bending or flexing of the mast under wind pressure on the sail and said sail engaging an edge of said slotted recess at all settings thereof.
Claim 2
Dependent Claim
183 words
In a sailboat having a conventional stayed mast which in use is essentially stationary, vertical and stepped on the center line of the boat, a sail, a rotatable wind-up member supported by the mast and to which the luff of the sail is made fast and on which the sail may be furled and unfurled by appropriate rotation thereof as the sail is hauled out or retracted, the improvement wherein said wind-up member is flexible, the mast is provided with a longitudinally extending aft-facing slotted recess within which said wind-up member is housed and through the opening of which the sail is hauled out and retracted, said wind-up member with said luff attached having a diameter greater than the width of said opening so as to be held therein by engagement with the edges of said opening, the walls of said recess providing support for said wind-up member to keep it in contact with the mast during bending or flexing of the mast under wind pressure on the sail and said sail engaging an edge of said slotted recess at all settings thereof.
Claim 3
Dependent Claim
51 words
The combination of claim 1 wherein the edges of said opening are smooth and non-fraying and shaped to retain the sail in proper set position, whether fully extended or reefed, at all swung positions of the sailboat with respect to the wind and flexed positions of the mast under wind load.
Claim 4
Dependent Claim
19 words
The combination of claim 1 wherein said slotted recess acts as a protective container for the sail when furled.
Claim 5
Dependent Claim
16 words
The combination of claim 2 wherein said slotted recess is formed integrally with the mast structure.
Claim 6
Dependent Claim
19 words
The combination of claim 1 wherein said slotted recess is provided by auxiliary members attached to a conventional mast.
Claim 7
Dependent Claim
25 words
The combination of claim 1 including means to adjust the position of the lower end of said wind-up member in a fore and aft direction.
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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |