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Publication numberUS2366795 A
Publication typeGrant
Publication dateJan 9, 1945
Filing dateOct 10, 1942
Priority dateOct 10, 1942
Publication numberUS 2366795 A, US 2366795A, US-A-2366795, US2366795 A, US2366795A
InventorsLamorcaux George R
Original AssigneeLamorcaux George R
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 2366795 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

Jan. 9, 1945. G. R. ,LAMOREAUX 2,366,795

PROPELLER Filed Oct. 10, 1942 2 Sheets-Sheet 1 I ll/ Inventor 620g? Elam/15010.15

and flaw Z? M35 1945- G. R. LAMOREAUX 2,366,795

PROPELLER Filed Oct. 10, 1942 2 Sheets-Sheet 2 Inventar 'eoye Z? Lamar-sauna Jfi WW 1?. m

Patented Jan. 9. 1945 UNITED STATES PATENT OFFICE This'inventlon relates to new and useful improvements in propellers for aircraft and other vehicles.

The principal object of the present invention is to provide a propeller constructed in such a manner that substantially perfect static and dynamic balance can be obtained.

Other objects and advantages of the invention will become apparent to the-reader of the 7 following description.

In the drawings- Figure 1 represents a side elevational view of one form of propeller showing .the blade adjustably mounted.

Figure 2 is a fragmentary top plan view.

Figure 3 is a fragmentary enlarged sectional view on the line 3-3 of Figure 1.

Figure 4 is a front elevational view of a. modification of the invention showing fixed blades.

Figure 5 is a fragmentary top plan view of the structure shown in Figure 4. a

Figure 6 is a fragmentary detailed sectional view.

Referring to Figures 1, 2 and 3, it can be seen that numeral 5 denotes a hub structure from which radiates a plurality of'adjustable blades 6 having conventional means for adjusting the pitch of the blades, each blade having a lubricant duct 1 therethrouzh.

At the outer end of each blade 8 is a projection 8 terminating in a pintle ,9. These pintles l are disposed into bearing formations l0 located on an annulus II. The annulus II has threaded openings at the bearings III which are normal] closed by threaded plugs l2.

Obviously, the ring I I serves to prevent any tendency of the blades to work loose in the hub 5 and also defines a support for the outer ends of the blades.

, In order to achieve substantially perfect static and dynamic balance, adjustable weight members l3 are provided on the annulus ll, each being in the form of a sleeve having a suitable detent l4;-

Figures 4,. 5 and 6 disclose a modification of the'lnvention. reference character to defining a hub from which rigid blades to project and are rigidly secured at their outer ends to an annulus Ila.

On the annulus Ha are sleeve-like weight members l3a provided with suitable detent means a which can be adjusted to achieve substantially perfect static and dynamic balance.

While the foregoing specification sets forth the invention in specific terms, it is to be understood that numerous changes in the., shape, size and material may be resorted to without departing from the spirit and scope of the invention as claimed hereinafter.

Having described the invention, what is claimed as new is:

V A propeller of the character described com- GEORGE R. LAMOREAUX.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2558737 *Dec 13, 1946Jul 3, 1951Master Electric CoRotor balancing means
US3028072 *May 5, 1958Apr 3, 1962Torrington Mfg CoAir impelling fan and associated part
US4109549 *Jun 28, 1976Aug 29, 1978Vincent Raymond ADynamic balancer for rotating bodies and method of manufacturing same
US4767270 *Apr 16, 1986Aug 30, 1988The Boeing CompanyHoop fan jet engine
US5011374 *Nov 17, 1989Apr 30, 1991General Electric CompanyMethod and apparatus for balancing turbine rotors
US5044884 *Sep 5, 1989Sep 3, 1991Trustees Of The University Of PennsylvaniaSafety propeller
US5380156 *Apr 12, 1993Jan 10, 1995Iacovino; RobertCeiling fan balance apparatus
US5415524 *Jun 1, 1993May 16, 1995Gamble; Christopher L.Fluid propulsion device
US5620153 *Mar 20, 1995Apr 15, 1997Ginsberg; Harold M.Light aircraft with inflatable parachute wing propelled by a ducted propeller
US5988978 *Dec 18, 1997Nov 23, 1999Hunter Fan CompanyMethod and apparatus for balancing a ceiling fan
US6960063 *Apr 25, 2002Nov 1, 2005Vortexhc, LlcVortex attractor without a backplate
US7189061 *Sep 30, 2004Mar 13, 2007Valeo Electrical Systems, Inc.Cooling fan for vehicles
US8353670Jul 30, 2009Jan 15, 2013Pratt & Whitney Canada Corp.Axial balancing clip weight for rotor assembly and method for balancing a rotor assembly
US8631578Oct 1, 2009Jan 21, 2014Pratt & Whitney Canada Corp.Radial balancing clip weight for rotor assembly
U.S. Classification416/145, 416/189, 416/194
International ClassificationB64C11/00
Cooperative ClassificationB64C11/001
European ClassificationB64C11/00B