US3874316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cross jet rudder for watercraft
Assignee: CNH Industrial Baumaschinen GmbH
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Filing: 1973-08-06
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Granted: 1975-04-01
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Expires: 1993-08-06
Abstract
Abstract A watercraft comprises a hull having an outer surface below water-line with an inwardly indented cross-channel extending from one side to the other of the hull. A propeller is rotatably mounted within the cross-channel and oriented to direct a flow through the channel from one side of the hull to the other. In addition a conduit which defines a pressure equalizing passage extends through the hull from the outer skin on one side thereof to the cross-channel and advantageously another pressure equalizing passage extends through the hull from the exterior on the opposite side to the cross-channel.
Inventors
- 👤 Otto Lorenz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:33
CPC Classifications
B; B63; B63H; B63H25/00; B63H25/46
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
101 words
A cross jet rudder for watercraft, comprising a watercraft hull having a steering water channel defined in said hull extending transversely from side to side below the water line thereof, a water pressure equalizing channel extending entirely below the water line and from the outer surface of said hull on one side of the watercraft directly adjacent the steering water channel and directly into the steering water channel at a spaced location from at least one end thereof and being normally filled with sea water, and propulsion means in said steering water channel for moving water through said steering water channel.
Claim 2
Dependent Claim
101 words
A cross jet rudder for watercraft, comprising a watercraft hull having a steering water channel defined in said hull extending transversely from side to side below the water line thereof, a water pressure equalizing channel extending entirely below the water line and from the outer surface of said hull on one side of the watercraft directly adjacent the steering water channel and directly into the steering water channel at a spaced location from at least one end thereof and being normally filled with sea water, and propulsion means in said steering water channel for moving water through said steering water channel.
Claim 3
Dependent Claim
58 words
A cross jet rudder according to claim 1, wherein said water pressure equalizing channel is located on one side of said hull, and including an additional water pressure equalizing channel on the opposite side of said hull, extending from the exterior surface of said hull into said steering water channel at a spaced location from its opposite end.
Claim 4
Dependent Claim
115 words
A watercraft comprising a hull having an exterior surface, a cross water channel extending tRansversely through said hull, propulsion means in said cross water channel oriented between the ends thereof in a position to direct flow through said channel from one end to the other, said crosswater channel terminating in an opening on each side of said hull, and a water pressure equalizing conduit located entirely below water level and extending through said hull directly adjacent said cross water channel from the exterior surface thereof, into said crosswater channel, said water pressure equalizing conduit having an open sea water receiving end below water level at the end thereof extending through the surface of said hull.
Claim 5
Dependent Claim
115 words
A watercraft comprising a hull having an exterior surface, a cross water channel extending tRansversely through said hull, propulsion means in said cross water channel oriented between the ends thereof in a position to direct flow through said channel from one end to the other, said crosswater channel terminating in an opening on each side of said hull, and a water pressure equalizing conduit located entirely below water level and extending through said hull directly adjacent said cross water channel from the exterior surface thereof, into said crosswater channel, said water pressure equalizing conduit having an open sea water receiving end below water level at the end thereof extending through the surface of said hull.
Claim 6
Dependent Claim
17 words
A watercraft according to claim 3, wherein said crosswater channel is opened downwardly through said hull bottom.
Claim 7
Dependent Claim
51 words
A watercraft according to claim 3, wherein there is a water pressure equalizing conduit on each side of the hull each having an opening below water level on the respective side of the hull and each being connected into said cross water channel at a spaced location from its associated end.
References Cited (Backward Citations)
US985187A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |