US1826026A - Propeller - Google Patents

Propeller Download PDF

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Publication number
US1826026A
US1826026A US380487A US38048729A US1826026A US 1826026 A US1826026 A US 1826026A US 380487 A US380487 A US 380487A US 38048729 A US38048729 A US 38048729A US 1826026 A US1826026 A US 1826026A
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US
United States
Prior art keywords
blade
hub
propeller
blades
water
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
US380487A
Inventor
Rudeberg Arvid
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MENITOR AB
Original Assignee
MENITOR AB
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
Application filed by MENITOR AB filed Critical MENITOR AB
Application granted granted Critical
Publication of US1826026A publication Critical patent/US1826026A/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
    • B63H1/02—Propulsive elements directly acting on water of rotary type
    • B63H1/12—Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
    • B63H1/14—Propellers
    • B63H1/26—Blades
    • 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
    • B63H1/02—Propulsive elements directly acting on water of rotary type
    • B63H1/12—Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
    • B63H1/14—Propellers
    • B63H1/20—Hubs; Blade connections

Definitions

  • the present invention relates to a propeller for driving ships and other vessels through water and in which the working surfaces of the blades are convex in the portions next to the hub and concave in the outer portions, so
  • Fig. 1 shows the propeller seen from astern
  • Fig. 2 a longitudinal section of one of the propeller blades
  • Fig. 3 is a cross section through the convex portion
  • Fig. 4 a cross section through the concave portion of the blade.
  • the central line of the root of theblade is at an angle to the hub in such a manner
  • leading edge 1 of the blade is in front of the rear edge 2 in the axial direction, and this angle increases towards the outer portion of the blade.
  • the working surface of the blade is convex up to a certain distance from the hub and then gradually merging into an outer concave portion t, so that a longitudinal section through the working surface shows a line in the form of an 8.
  • the convex portion of 3% the blade is designated by 3.
  • a propeller having a hub and blades extending therefrom, each of said blades having a root portion adjacent the hub of flatly vate form arranged with its longer axis in a plane radial to the axis of the hub and at an acute angle thereto, the outer portion of each blade being convexly curved on one side and concavely curved on the other side in both longitudinal and transverse directions with the curved surfaces merging smoothly into the root portion of the blade whereby the rear surface of the blade is reversely curved from hub to tip in longitudinal section, the front and rear faces of said blade tapering gradually toward each other from hub to tip longitudinally and from the center to the leading and trailing edges transversely,
  • ARVID RUDEBERG ARVID RUDEBERG.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Description

A. RUDEBERG Def. 6, 1931.
Patented Get. 6, 1931 aural) STATES PATENT OFFICE ARVID RUDEBERG, OF STOGKHOLM, SWEDEN, ASSIGNOR TO AKTIEBOLAGET MENITOR,
OF STOGKHOLM, SWEDEN PBOPELLER Application filed July 24, 1929, Serial No. 380,487, and in Sweden August 8, 1928.
The present invention relates to a propeller for driving ships and other vessels through water and in which the working surfaces of the blades are convex in the portions next to the hub and concave in the outer portions, so
that the water, into which the concave portions cut, is directed outwards from the propeller shaft, thus preventing an accumulation of water around the propeller shaft and eddyin g movement in the water.
In the accompanying drawings, Fig. 1 shows the propeller seen from astern, and Fig. 2 a longitudinal section of one of the propeller blades. Fig. 3 is a cross section through the convex portion, and Fig. 4 a cross section through the concave portion of the blade.
The central line of the root of theblade is at an angle to the hub in such a manner,
that the leading edge 1 of the blade is in front of the rear edge 2 in the axial direction, and this angle increases towards the outer portion of the blade.
The working surface of the blade is convex up to a certain distance from the hub and then gradually merging into an outer concave portion t, so that a longitudinal section through the working surface shows a line in the form of an 8. The convex portion of 3% the blade is designated by 3.
Having now described my invention, what I claim as new and desire to secure by Letters Patent is v A propeller having a hub and blades extending therefrom, each of said blades having a root portion adjacent the hub of flatly vate form arranged with its longer axis in a plane radial to the axis of the hub and at an acute angle thereto, the outer portion of each blade being convexly curved on one side and concavely curved on the other side in both longitudinal and transverse directions with the curved surfaces merging smoothly into the root portion of the blade whereby the rear surface of the blade is reversely curved from hub to tip in longitudinal section, the front and rear faces of said blade tapering gradually toward each other from hub to tip longitudinally and from the center to the leading and trailing edges transversely,
ARVID RUDEBERG.
US380487A 1928-08-08 1929-07-24 Propeller Expired - Lifetime US1826026A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE1826026X 1928-08-08

Publications (1)

Publication Number Publication Date
US1826026A true US1826026A (en) 1931-10-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
US380487A Expired - Lifetime US1826026A (en) 1928-08-08 1929-07-24 Propeller

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2616511A (en) * 1948-06-03 1952-11-04 Trochoidal Propellers Inc Turbo-propeller
US3349534A (en) * 1964-06-30 1967-10-31 Jaywoth Roof Tile Co Inc Roofing tile
US20050053493A1 (en) * 2003-09-05 2005-03-10 Lg Electronics Inc. Axial flow fan
EP2826706A4 (en) * 2012-03-14 2016-04-06 Tsuneishi Shipbulding Co Ltd Marine propeller

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2616511A (en) * 1948-06-03 1952-11-04 Trochoidal Propellers Inc Turbo-propeller
US3349534A (en) * 1964-06-30 1967-10-31 Jaywoth Roof Tile Co Inc Roofing tile
US20050053493A1 (en) * 2003-09-05 2005-03-10 Lg Electronics Inc. Axial flow fan
EP2826706A4 (en) * 2012-03-14 2016-04-06 Tsuneishi Shipbulding Co Ltd Marine propeller

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