US3565032A - Propulsion arrangement for watercraft - Google Patents

Propulsion arrangement for watercraft Download PDF

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Publication number
US3565032A
US3565032A US797482A US3565032DA US3565032A US 3565032 A US3565032 A US 3565032A US 797482 A US797482 A US 797482A US 3565032D A US3565032D A US 3565032DA US 3565032 A US3565032 A US 3565032A
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US
United States
Prior art keywords
propulsion arrangement
marine propulsion
concavity
blades
hull
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US797482A
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English (en)
Inventor
Heinrich Hertel
Klaus Affeld
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Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19681581104 external-priority patent/DE1581104A1/de
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3565032A publication Critical patent/US3565032A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H1/00—Propulsive elements directly acting on water
    • B63H1/30—Propulsive elements directly acting on water of non-rotary type
    • B63H1/36—Propulsive elements directly acting on water of non-rotary type swinging sideways, e.g. fishtail type

Definitions

  • the novel feature of the invention resides in the installation of a propeller at the underside of the vessel proximate to the how so that, in one of its positions, the blade is almost completely withdrawninto a concavity fonned in the bottom of the hull.
  • the bow of the vessel is extended below the level of the keel and outlines a recess in which the propeller blade is receivable.
  • a vessel incorporating the propulsion arrangement of the present invention is well adapted forpassing through shallow waters having submerged sandbanks.
  • the pumping motion executed by the propeller sucks -up sand and clears a channel through which the vessel may proceed.
  • the extension of the bow below the keel prevents the sucking in of air, so that the efficiency of the propulsion arrangement is increased.
  • the vessel is provided with one propeller of substantially the same blade length as the width of the hull. This arrangement is particularly satisfactory when the sandbanks are wider than the vessel.
  • a plurality of separate blades are disposed side by side across the width of the hull. The blades may be of the same or of different size and oscillate at the same or at different speeds. In the latter case differential speeds may be coordinated with the steering controls of the vessel.
  • FIG. I is a longitudinal sectional view of the bow portion of a vessel embodying one form of the improved propulsion arrangement
  • FIG. 2 is a cross-sectional view of the vessel as seen in the direction of arrows from the line 26 in FIG. 1;
  • FIG. 3 is a longitudinal sectional view of the bow portion of a vessel wherein the propulsion arrangement comprises two propellers in tandem; and 1 FIG. 4 is a cross-sectional view of the bow of a vessel with three propellers side by side.
  • FIG. I there is shown'the hull l of a vessel which has at its underside a concavity 4, extending from the bottom of the hull toward the interior of the vessels body.
  • a propeller blade 2 in the concavity 4 has a rear end 10 pivotally mounted with clearance on the hull l for movement about a horizontal axis normal to the longitudinal axis of the vessel.
  • the front end of the blade 2 is articulately attached-to a shaft 3 which is actuatable by drive means such as, for example, a Diesel engine (not shown) to move up and down as indicated by the arrow 9.
  • the movements of shaft 3 cause the blade 2 to oscillate about its rear end 10 and to move toward, and away from, the wall 12 in the interior of the concavity 4.
  • the body of the vessel itself, and detent means 7 prevent excessive displacement of the rear end 10 of the blade 2
  • the pumping motion of the oscillating blade 2 produces a stream which is indicated by the arrow 11 whereby the vessel moves in opposite direction.
  • An extension of the bow 5 below the level of the keel of the vessel, as well as the side walls 8 of the hull prevent air from being sucked in during the intake stroke.
  • Rocks or sand 6 scooped up during the upward stroke of the blade 2 are harmlessly deflected from the blade surface remote from the wall 12, since the speed at which the blade moves is slower than the speed of the fluid flow.
  • FIG. 2 shows that the length of the propeller blade 2 is approximately equal to the width of hull l.
  • the reference numerals 25 denote vertical guides for the shaft 3.
  • the vessel shown in FIG. 3 has two concavities respectively denoted by 4a and 4b in the bottom of the hull.
  • Propeller blade 2a is movable in concavity 4a and propeller blade 2b is movable in concavity 4b at coordinated or separate speeds relative to each other.
  • Vertical guides 25 for the respective drive shafts are provided in each of the compartments 16, 17 and I8.
  • blade 15 has a greater and blade 13 a lesser up-and-down speed, as indicated by the relative lengths of the arrows 27, 28 and 29, the vessel will turn about an imaginary axis such as the line indicated by the numeral 24.
  • a marine propulsion arrangement for watercraft comprising a hull having a bottom part provided with a submerged concavity adjacent to the bow, propeller blade means having a rear end and a front end, said rear end being movably attached to the underside of said hull and said front end being movable in said concavity up and down to thereby pump water into and from said concavity, and means for moving said front end.
  • a marine propulsion arrangement as defined in claim I further comprising a projection on said bow extending substantially vertically downwardly in front of said concavity.
  • a marine propulsion arrangement as defined in claim 4 comprising vertical guides for said shaft.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Transmission Devices (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US797482A 1968-02-08 1969-02-07 Propulsion arrangement for watercraft Expired - Lifetime US3565032A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681581104 DE1581104A1 (de) 1968-02-08 1968-02-08 Schiffsantrieb durch Plattenpropeller

Publications (1)

Publication Number Publication Date
US3565032A true US3565032A (en) 1971-02-23

Family

ID=5679291

Family Applications (1)

Application Number Title Priority Date Filing Date
US797482A Expired - Lifetime US3565032A (en) 1968-02-08 1969-02-07 Propulsion arrangement for watercraft

Country Status (3)

Country Link
US (1) US3565032A (enrdf_load_stackoverflow)
FR (1) FR2001532A1 (enrdf_load_stackoverflow)
GB (1) GB1256973A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4246861A (en) * 1979-03-22 1981-01-27 Mikina Stanley J Buoyant craft

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3453981A (en) * 1967-04-24 1969-07-08 Joseph A Gause Water-borne vessel comprising propulsion system incorporating flexible fin propulsion members

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3453981A (en) * 1967-04-24 1969-07-08 Joseph A Gause Water-borne vessel comprising propulsion system incorporating flexible fin propulsion members

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4246861A (en) * 1979-03-22 1981-01-27 Mikina Stanley J Buoyant craft

Also Published As

Publication number Publication date
GB1256973A (enrdf_load_stackoverflow) 1971-12-15
FR2001532A1 (enrdf_load_stackoverflow) 1969-09-26

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