US2612961A - Propeller having adjustable blades - Google Patents

Propeller having adjustable blades Download PDF

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Publication number
US2612961A
US2612961A US731257A US73125747A US2612961A US 2612961 A US2612961 A US 2612961A US 731257 A US731257 A US 731257A US 73125747 A US73125747 A US 73125747A US 2612961 A US2612961 A US 2612961A
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United States
Prior art keywords
hub
propeller
blades
trunnion
blade
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Expired - Lifetime
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US731257A
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Kapsenberg Cornelis
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Koninklijke de Schelde Mij NV
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Koninklijke de Schelde Mij NV
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
    • B64C11/30—Blade pitch-changing mechanisms
    • B64C11/38—Blade pitch-changing mechanisms fluid, e.g. hydraulic
    • B64C11/42—Blade pitch-changing mechanisms fluid, e.g. hydraulic non-automatic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H3/00—Propeller-blade pitch changing
    • B63H3/02—Propeller-blade pitch changing actuated by control element coaxial with propeller shaft, e.g. the control element being rotary
    • B63H3/04—Propeller-blade pitch changing actuated by control element coaxial with propeller shaft, e.g. the control element being rotary the control element being reciprocatable

Definitions

  • the invention relates to a propeller for airor watercraft comprising one or more pairs of diametrically disposed adjustable blades which can be actuated for adjustment from the craft, the said-blades having crank-shaped root end portions supported in the propeller hub by means of trunnion members disposed at opposite ends of each of the crank-shaped portions, the actuating mechanism acting on the said crankshaped portions.
  • crank-shaped portions with bearingsat two points spaced apart in order to obtain a strong andstiff support for the propeller blades.
  • Figure 3 is a side view of a its crank and trunnion.
  • FIG. 4 is a sectional view of the hub.
  • the propeller hub is indicated by I propeller blade and and the blade 2 and 3 are diametrically arranged.
  • the blade roots 4 and 5 include crank portions and are mutually of the same design.
  • the portion 5 has a big bearing or shaft part 8 at the top constituting a trunnion which is rotatably mounted in a bearin in the periphery of the hub I.
  • the portion 5 is provided with a smaller bearing 0r shaft part 9 bearing in the center of the big bearing part or trunnion 6 of of the hub l.
  • each of the root ends of the blade is provided with two crank cheeks and with two bearin parts, the bearing parts of each blade root having different diameters, the bearing part of each root havingthe larger diameter being located at the side of the 1 and the bearing parts of the blade roots are made in the form of counter or thrust flanges therefor.
  • the construction according to the invention may be such as to enable the hub to be made in one piece (not in two halves for instance).
  • crankshaped blade root ends may be fitted through the radial hub borings and engage inside each other within the hub.
  • Figure 1 is a cross sectional elevation of a. pro:
  • Figure 2 illustrates in side view a hub for a four-bladed propeller.
  • crankshaped portion 4 of the other blades which, in its turn, bears in the periphery
  • the small bearing part 1 at the free end of the crankshaped portion 4 bears in the big bearing part 8 of the portion 5.
  • the actuating mechanism engages the crank portions 4 and 5 at the places l0 and H formed as crank pins.
  • the actuating rod is indicated by I4.
  • the radial forces again are taken up by flanges I3 which are mounted separately.
  • the blades 3 are each provided with a flange-shaped foot 20 which is firmly attached by means of bolts 2! to the flange-shaped part 8.
  • the plane in which the second pair of blades will move may be arranged at some distance from the plane in which the first pair moves, as indicated in Fig. 2.
  • each blade will move in ianother plane at right angles to the axis of rotaion.
  • a propeller comprising a hollow hub and a pair of blades diametrically protruding from said hub, the root ends of the blades extending into the hub and being crank-shaped within the space inside the hub, the portion of such root end between the blade and the crank-shaped portion being cylindrical in shape to constitute a trunnion, said hub having a cylindrical boring at the side of the blade serving as a bearing for said trunnion, said trunnion having a coaxial boring, the free end of the crank-shaped portion being provided with a, cylindrical projection extending to the opposite side of the hub and coaxially with the said trunnion, said projection having a smaller diameter than the said trunnion, the said projection bearing in the coaxial borin of the trunnion that forms part of the other blade of the pair of blades with which the projection is coherent.
  • a propeller comprising a hollow hub and a pair of blades diametrically protruding from said hub, the blades being provided with flange shaped feet near the hub, such flange shaped foot of each blade being coaxially attached to a counter-.
  • the said trunnion having a coaxial boring and forming part of a crank-shaped member extending coaxially therewith into the hollow the said trunnion, the said projection bearing in the coaxial boring of the counterfiange-shaped 7 15 said projection having a smaller diameter than trunnion attached to the flange-shaped foot of the other blade of the pair of blades with which the projection is coherent.

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  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Earth Drilling (AREA)

Description

Oct. 7, 1952 c. KAPSENBERG 2,612,961
PROPELLER HAVING ADJUSTABLE BLADES Filed Feb. 27, 1947 2 SHEETS-SHEET l Oct. 7, 1952 c, KAPSENBERG 2,612,961
PROPELLER HAVING ADJUSTABLE BLADES Filed Feb. 27, 1947 2 SHEETS-SHEET 2 FIG .4.
I77 vevz Zm- Corwe PM ffii serz eky Patented Oct. 7, 1 952 PROPELLER. HAVING ADJUSTABLE BLADES Cornell s Kapsenberg, Middelburg, Netherlands, assignor to N. V. Koninklijke Maatschappij ,De
Schelde, Vlissingen, Netherlands, acompany of the Netherlands Application February 21, 1947, SerialNo. 731,257
. 1" In the Netherlands March 9," 1943 Section 1, Public Law 690, August 8, 1946 Patent expires March}, 1963 2 Claims. (01. oe-160.24)
1 The invention relates to a propeller for airor watercraft comprising one or more pairs of diametrically disposed adjustable blades which can be actuated for adjustment from the craft, the said-blades having crank-shaped root end portions supported in the propeller hub by means of trunnion members disposed at opposite ends of each of the crank-shaped portions, the actuating mechanism acting on the said crankshaped portions.
It is another object of the invention to procure a construction which can be easily fitted together.
It is a further object of the invention to provide the crank-shaped portions with bearingsat two points spaced apart in order to obtain a strong andstiff support for the propeller blades.
2 Figure 3 is a side view of a its crank and trunnion.
Figure 4 is a sectional view of the hub. In Fig. 1 the propeller hub is indicated by I propeller blade and and the blade 2 and 3 are diametrically arranged.
The blade roots 4 and 5 include crank portions and are mutually of the same design. The portion 5 has a big bearing or shaft part 8 at the top constituting a trunnion which is rotatably mounted in a bearin in the periphery of the hub I. At its lower end the portion 5 is provided with a smaller bearing 0r shaft part 9 bearing in the center of the big bearing part or trunnion 6 of of the hub l.
According'to the invention each of the root ends of the blade is provided with two crank cheeks and with two bearin parts, the bearing parts of each blade root having different diameters, the bearing part of each root havingthe larger diameter being located at the side of the 1 and the bearing parts of the blade roots are made in the form of counter or thrust flanges therefor.
Due to this construction a new blade can be fitted when the old one is broken, in just the same way as ,in an ordinary propeller, without removing. anything from the hub or from the actuating mechanism or dismantling some other part of the propeller.
The construction according to the invention may be such as to enable the hub to be made in one piece (not in two halves for instance).
The crankshaped blade root ends may be fitted through the radial hub borings and engage inside each other within the hub.
In the drawings: Figure 1 is a cross sectional elevation of a. pro:
:peller hub taken at right angles to the axis of 'the hub at the point where a pair of propeller blades are mounted in an adjustable manner on the hub.
Figure 2 illustrates in side view a hub for a four-bladed propeller.
the other crankshaped portion 4 of the other blades, which, in its turn, bears in the periphery The small bearing part 1 at the free end of the crankshaped portion 4 bears in the big bearing part 8 of the portion 5.
The actuating mechanism engages the crank portions 4 and 5 at the places l0 and H formed as crank pins. The actuating rod is indicated by I4. The radial forces again are taken up by flanges I3 which are mounted separately. As shown in Fig. 3 the blades 3 are each provided with a flange-shaped foot 20 which is firmly attached by means of bolts 2! to the flange-shaped part 8.
In the case of propellers having more than one pair of blades, e. g. in the case of four-bladed propellers, the plane in which the second pair of blades will move may be arranged at some distance from the plane in which the first pair moves, as indicated in Fig. 2. In the case of three-bladed propellers each blade will move in ianother plane at right angles to the axis of rotaion.
What I claim is:
1. A propeller comprising a hollow hub and a pair of blades diametrically protruding from said hub, the root ends of the blades extending into the hub and being crank-shaped within the space inside the hub, the portion of such root end between the blade and the crank-shaped portion being cylindrical in shape to constitute a trunnion, said hub having a cylindrical boring at the side of the blade serving as a bearing for said trunnion, said trunnion having a coaxial boring, the free end of the crank-shaped portion being provided with a, cylindrical projection extending to the opposite side of the hub and coaxially with the said trunnion, said projection having a smaller diameter than the said trunnion, the said projection bearing in the coaxial borin of the trunnion that forms part of the other blade of the pair of blades with which the projection is coherent.
2. A propeller comprising a hollow hub and a pair of blades diametrically protruding from said hub, the blades being provided with flange shaped feet near the hub, such flange shaped foot of each blade being coaxially attached to a counter-.
flange-shaped member constituting a, trunnion, said hub having a cylindrical boring in the cir-" cumference thereof serving as a bearing for said,
trunnion, the said trunnion having a coaxial boring and forming part of a crank-shaped member extending coaxially therewith into the hollow the said trunnion, the said projection bearing in the coaxial boring of the counterfiange-shaped 7 15 said projection having a smaller diameter than trunnion attached to the flange-shaped foot of the other blade of the pair of blades with which the projection is coherent.
' CORNELIS KAPSENBERG.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number 4 Name Date 1,510,086 Englesson Sept. 30, 1924 1,656,019 Roberts Jan. 10, 1928 2,417,003 MacAlpin Mar. 4, 1947 FOREIGN PATENTS Number Country Date 11 ,625 Great Britain May 28, 1908
US731257A 1943-03-09 1947-02-27 Propeller having adjustable blades Expired - Lifetime US2612961A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3029876A (en) * 1960-05-27 1962-04-17 Beech Aircraft Corp Propeller
US3130677A (en) * 1962-01-29 1964-04-28 Dorsey M Liebhart Variable pitch fan

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190811625A (en) * 1908-05-28 1909-05-06 Franz Max Osswald Improvements in Adjustable Propeller Screws.
US1510086A (en) * 1922-02-18 1924-09-30 Englesson John Elov Arrangement at hubs for turbine, pump, or propeller wheels with turnable vanes
US1656019A (en) * 1926-05-21 1928-01-10 Allis Chalmers Mfg Co Rotor
US2417003A (en) * 1943-09-18 1947-03-04 Bell Aircraft Corp Changeable pitch airscrew hub

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190811625A (en) * 1908-05-28 1909-05-06 Franz Max Osswald Improvements in Adjustable Propeller Screws.
US1510086A (en) * 1922-02-18 1924-09-30 Englesson John Elov Arrangement at hubs for turbine, pump, or propeller wheels with turnable vanes
US1656019A (en) * 1926-05-21 1928-01-10 Allis Chalmers Mfg Co Rotor
US2417003A (en) * 1943-09-18 1947-03-04 Bell Aircraft Corp Changeable pitch airscrew hub

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3029876A (en) * 1960-05-27 1962-04-17 Beech Aircraft Corp Propeller
US3130677A (en) * 1962-01-29 1964-04-28 Dorsey M Liebhart Variable pitch fan

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