US123274A - Improvement in propellers - Google Patents

Improvement in propellers Download PDF

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US123274A
US123274A US123274DA US123274A US 123274 A US123274 A US 123274A US 123274D A US123274D A US 123274DA US 123274 A US123274 A US 123274A
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blades
hub
propellers
improvement
flanges
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/26Rotors specially for elastic fluids
    • F04D29/32Rotors specially for elastic fluids for axial flow pumps
    • F04D29/34Blade mountings

Description

G. L. McCAY. Improvement in Propellers.

Patented .Ian. 30, 1872} GEORGE L. MCOAY, OF LINWOOD STATION, PENNSYLVANIA.

IMPROVEMENT IN PROPELLERS.

Specification forming part of Letters Patent No. 123,274, dated January 30, 1872.

Specification describing an Improvement in Propellers, invented by GEORGE L. MOGAY, of Linwood Station, Delaware county, Pennsylvania.

Improvement in Propellers.

My invention relates to propellers in which the blades are secured separately to the hub; and consists in the peculiar manner of securing the blades, too fully described hereafter to need preliminary explanation, whereby the removal of any one or more damaged blades and the insertion of new ones may be readily efl'ected.

Figure 1 is a front view, partly in section, of my improved propeller; Fig. 2, a plan View; Fig. 3, a transverse section of the hub or vane of the propeller drawn to an enlarged scale; and Fig. 4, a perspective view illustrating the detailed construction of my invention.

The-blades A A of the propeller may be of any shape or pitch which circumstances may suggest, but they are secured to the hub in the peculiar manner which I will now proceed to describe. B is the hub secured to the propeller-shaft D, and this hub has an enlarged central portion, a, and at the opposite ends of the latter portions 1) 1) reduced in diameter. In the enlarged portion aof the hub are cut as many dovetailed grooves (1 as there are blades, four in the present instance, and into each groove fits the dovetailed rib e of the flange E of one of the blades. These flanges E are such that when all the blades are adjusted. to their places on the hub the said flanges will fit snugly to and completely incase the enlarged portion a of the hub, the flanges of one blade touching or nearly touching that of the adjoining blade, as seen in Fig. 1. A collar, G, is fitted to each reduced portion 1) of the hub, and each collar abuts against a shoulder, y, formed on the hub where the enlarged portion ofthe same meets the reduced portion, the collar also bearing against the ends of the flanges of the blades, and having an annular lip, h, which overlaps the recessed ends .00 of the said flanges. Each collar is confined to the shaft D, in the present instance, by a transverse pin, it; but it should be understood that I do not desire to restrict myself to this precise mode of securing the collars to the shaft.

It will be seen that the annular lips h' of the ,collars aid the dovetailed ribs 6 in resisting all tendency of the blades to be detached in a radial direction from the hub, while the proper transverse position of the blade is insured by the collars G G, as shown in Fig. 3. As regards the resistance of any tendency of the blades to twist on the hub, reliance is not placed on the dovetailed ribs alone, as the flanges of the blades are fitted snugly to the hub and are confined thereto by the collars. The dovetailed ribs are consequently relieved to a great extent from strains imparted by the tendency of the blades to turn. The blades are, in fact, as much a part of the hub as if cast with the same, and yet any one or more of the blades can be removed and replaced with new ones, and thus the main object of my invention is attained, all that is necessary prior to the removal of any one or more of the blades being the withdrawal of one or both of the collars G G, so as to permit the sliding out of the blade from the hub.

I claim as my inVention- The combination, substantially as described, of the flanges E and dovetailed ribs 0 of the blades with the grooved hub and its detachable collars G G, having annular lips h adapted to the flanges of the blades, as set forth.

In testimony whereofI have signed my name to this specification in the presence of two sub scribing witnesses.

Witnesses GEORGE L. MGGAY.

ALFRED L. GRISWOLD, JOHN B. MCGAY, Jr.

US123274D Improvement in propellers Expired - Lifetime US123274A (en)

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2535527A (en) * 1946-08-15 1950-12-26 Archiebald S Barkley Model airplane propeller
US2542251A (en) * 1947-07-25 1951-02-20 Airmaster Corp Method of making fans
US3764228A (en) * 1971-10-04 1973-10-09 F Shook Replaceable blade propeller assembly
US3876331A (en) * 1972-11-22 1975-04-08 Robert Denherder Removable propeller blade assembly
US4930987A (en) * 1989-05-24 1990-06-05 Brad Stahl Marine propeller and hub assembly of plastic
US5180286A (en) * 1990-09-25 1993-01-19 Dean Peter E Propeller assembly
US6176680B1 (en) * 1998-06-22 2001-01-23 Itt Manufacturing Enterprises, Inc. Impeller having a hub assembled from a plurality of identical parts
US20100189563A1 (en) * 2009-01-27 2010-07-29 Gonzalez Abal Pablo Alfonso Propeller for vessels
WO2010086463A1 (en) * 2009-01-27 2010-08-05 Pablo Alfonso Gonzalez Abal Boat propeller
EP2484583A1 (en) * 2009-09-30 2012-08-08 Pablo Alfonso Gonzalez Abal Boat propulsion device
US20120308397A1 (en) * 2011-06-01 2012-12-06 Alstom Hydro France Propeller for a hydraulic machine, hydraulic machine equipped with such a propeller, and a method for assembling such a propeller
WO2017108255A1 (en) * 2015-12-23 2017-06-29 Siemens Aktiengesellschaft Propeller for a ship
EP3213811A3 (en) * 2016-03-01 2018-01-17 Sulzer Management AG Vane for an impeller of an agitator, impeller and agitator
US20180105246A1 (en) * 2016-10-17 2018-04-19 General Electric Company Apparatus and system for marine propeller blade dovetail stress reduction
US20180105242A1 (en) * 2016-10-17 2018-04-19 General Electric Company Method and system for improving flow characteristics in marine propellers
USD864837S1 (en) * 2018-08-22 2019-10-29 North American Aerospace Corporation Elliptical propeller

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2535527A (en) * 1946-08-15 1950-12-26 Archiebald S Barkley Model airplane propeller
US2542251A (en) * 1947-07-25 1951-02-20 Airmaster Corp Method of making fans
US3764228A (en) * 1971-10-04 1973-10-09 F Shook Replaceable blade propeller assembly
US3876331A (en) * 1972-11-22 1975-04-08 Robert Denherder Removable propeller blade assembly
US4930987A (en) * 1989-05-24 1990-06-05 Brad Stahl Marine propeller and hub assembly of plastic
US5180286A (en) * 1990-09-25 1993-01-19 Dean Peter E Propeller assembly
US6176680B1 (en) * 1998-06-22 2001-01-23 Itt Manufacturing Enterprises, Inc. Impeller having a hub assembled from a plurality of identical parts
US20100189563A1 (en) * 2009-01-27 2010-07-29 Gonzalez Abal Pablo Alfonso Propeller for vessels
WO2010086463A1 (en) * 2009-01-27 2010-08-05 Pablo Alfonso Gonzalez Abal Boat propeller
EP2484583A4 (en) * 2009-09-30 2013-03-13 Abal Pablo Alfonso Gonzalez Boat propulsion device
EP2484583A1 (en) * 2009-09-30 2012-08-08 Pablo Alfonso Gonzalez Abal Boat propulsion device
US20120308397A1 (en) * 2011-06-01 2012-12-06 Alstom Hydro France Propeller for a hydraulic machine, hydraulic machine equipped with such a propeller, and a method for assembling such a propeller
US9291145B2 (en) * 2011-06-01 2016-03-22 Alstom Renewable Technologies Propeller for a hydraulic machine, hydraulic machine equipped with such a propeller, and a method for assembling such a propeller
WO2017108255A1 (en) * 2015-12-23 2017-06-29 Siemens Aktiengesellschaft Propeller for a ship
EP3213811A3 (en) * 2016-03-01 2018-01-17 Sulzer Management AG Vane for an impeller of an agitator, impeller and agitator
US20180105246A1 (en) * 2016-10-17 2018-04-19 General Electric Company Apparatus and system for marine propeller blade dovetail stress reduction
US20180105242A1 (en) * 2016-10-17 2018-04-19 General Electric Company Method and system for improving flow characteristics in marine propellers
USD864837S1 (en) * 2018-08-22 2019-10-29 North American Aerospace Corporation Elliptical propeller

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