Patent US3745959A successfully refreshed from Google Patents.
US3745959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous flow hydrofoil configuration
Assignee: Boeing Co
•
Filing: 1971-12-03
•
Granted: 1973-07-17
•
Expires: 1991-12-03
Abstract
Abstract A hydrofoil support arrangement for a hydrofoil boat incorporating a water jet propulsion ducting mechanism for foilborne and hullborne operations. The arrangement employs a hydrofoil strut assembly which is pivotally mounted to the boat for pivoting the assembly to a foil-submerged or foil-emerged position. The foil strut assembly utilizes a center strut or column which has a first inlet and internal duct for feeding water to the propulsion means during foil-submerged conditions. A second hull inlet in the duct is provided which opens upon foilstrut retraction, thus replacing the first inlet so that continuous water input at the foilborne and hull-borne operations is maintained. The foil strut overall assembly adds to structural strength, and the outer struts act as efficient end plates to the lifting foil surfaces thereby reducing the tip vortex formation and increasing the system efficiency.
Inventors
- 👤 C Coffey
- 👤 R Gornstein
- 👤 W Shultz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:05
CPC Classifications
B; B63; B63B; B63B1/00; B63B1/16; B63B1/24; B63B1/28; B63B1/30
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
145 words
A hydrofoil support arrangement for a hydrofoil boat having a hull that carries water jet propulsion means for foilborne and hullborne operations, comprising: a. a foil-strut assembly pivotally connected to said boat hull for pivoting said assembly to a downward foil-submerged position and also to an upward emerged position; b. the hull being provided with water passage means leading to said propulsion means; c. said foil-strut assembly being provided with a waterreceiving inlet and duct means connecting the inlet with said passage means to supply water to the passage and propulsion means while said assembly is in said submerged position; d. and said passage menas having a water-receiving inlet for supplying water to said propulsion means when the foil-strut assembly is pivoted to said emerged position so that continuous water input for said propulsion means at said suBmerged and emerged foil positions is provided for.
Claim 2
Dependent Claim
145 words
A hydrofoil support arrangement for a hydrofoil boat having a hull that carries water jet propulsion means for foilborne and hullborne operations, comprising: a. a foil-strut assembly pivotally connected to said boat hull for pivoting said assembly to a downward foil-submerged position and also to an upward emerged position; b. the hull being provided with water passage means leading to said propulsion means; c. said foil-strut assembly being provided with a waterreceiving inlet and duct means connecting the inlet with said passage means to supply water to the passage and propulsion means while said assembly is in said submerged position; d. and said passage menas having a water-receiving inlet for supplying water to said propulsion means when the foil-strut assembly is pivoted to said emerged position so that continuous water input for said propulsion means at said suBmerged and emerged foil positions is provided for.
Claim 3
Dependent Claim
25 words
A hydrofoil support arrangement for a hydrofoil boat as claimed in claim 1, wherein said passage inlet is submerged only while said boat is hullborne.
Claim 4
Dependent Claim
37 words
A hydrofoil support arrangement for a hydrofoil boat as claimed in claim 1, wherein said pivotal connection of the foil-strut assembly to said hull is on an athwart axis located above the boat waterline during hullborne operation.
Claim 5
Dependent Claim
59 words
A hydrofoil support arrangement for a hydrofoil boat as claimed in claim 1, wherein said foil-strut assembly is the aft foil-strut assembly of the boat and said pivotal connection is on an axis athwart the hull, and said assembly is pivoted sternwards from it submerged to its emerged position, said assembly being substantially completely emerged in said emerged position.
Claim 6
Dependent Claim
43 words
A hydrofoil support arrangement for a hydrofoil boat as claimed in claim 1, wherein said foil-strut assembly comprises struts connected at their free ends by a hydrofoil section supporting between the struts a center column provided with said first-mentioned inlet and duct means.
Claim 7
Dependent Claim
25 words
A hydrofoil support arrangement for a hydrofoil boat as claimed in claim 5, wherein said center column in said emerged position exposes said passage inlet.
Claim 8
Dependent Claim
58 words
A hydrofoil support arrangement for a hydrofoil boat as claimed in claim 5, wherein said duct means connects said inlets with each other while said foil-strut assembly is in submerged position, and said center column swings said duct means away from said passage inlet when said assembly is pivoted to emerged position, whereby said passage inlet is exposed.
Claim 9
Dependent Claim
34 words
A hydrofoil support arrangement for a hydrofoil boat as claimed in claim 7, wherein said first-mentioned inlet faces forward adjacent said foil section, and said passage inlet is in the bottom of the hull.
References Cited (Backward Citations)
US3265027A
Cited
US3348514A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |