US2244770A - Operating device for propellers, turbine wheels, and pump wheels having rotatable blades - Google Patents

Operating device for propellers, turbine wheels, and pump wheels having rotatable blades Download PDF

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Publication number
US2244770A
US2244770A US184512A US18451238A US2244770A US 2244770 A US2244770 A US 2244770A US 184512 A US184512 A US 184512A US 18451238 A US18451238 A US 18451238A US 2244770 A US2244770 A US 2244770A
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Prior art keywords
servomotor
slide
piston
control valve
wheels
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Expired - Lifetime
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US184512A
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English (en)
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Englesson John Elov
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/34—Blade mountings
    • F04D29/36—Blade mountings adjustable
    • F04D29/362—Blade mountings adjustable during rotation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H3/00—Propeller-blade pitch changing
    • B63H3/06—Propeller-blade pitch changing characterised by use of non-mechanical actuating means, e.g. electrical
    • B63H3/08—Propeller-blade pitch changing characterised by use of non-mechanical actuating means, e.g. electrical fluid
    • B63H3/081—Propeller-blade pitch changing characterised by use of non-mechanical actuating means, e.g. electrical fluid actuated by control element coaxial with the propeller shaft
    • B63H3/082—Propeller-blade pitch changing characterised by use of non-mechanical actuating means, e.g. electrical fluid actuated by control element coaxial with the propeller shaft the control element being axially reciprocatable
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B39/00—Knitting processes, apparatus or machines not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D7/00—Rotors with blades adjustable in operation; Control thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
    • F03B3/12—Blades; Blade-carrying rotors
    • F03B3/14—Rotors having adjustable blades
    • F03B3/145—Mechanisms for adjusting the blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0055—Rotors with adjustable blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D3/00—Axial-flow pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H3/00—Propeller-blade pitch changing
    • B63H3/06—Propeller-blade pitch changing characterised by use of non-mechanical actuating means, e.g. electrical
    • B63H3/08—Propeller-blade pitch changing characterised by use of non-mechanical actuating means, e.g. electrical fluid
    • B63H2003/088—Propeller-blade pitch changing characterised by use of non-mechanical actuating means, e.g. electrical fluid characterised by supply of fluid actuating medium to control element, e.g. of hydraulic fluid to actuator co-rotating with the propeller
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/70—Adjusting of angle of incidence or attack of rotating blades
    • F05B2260/76—Adjusting of angle of incidence or attack of rotating blades the adjusting mechanism using auxiliary power sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/70—Adjusting of angle of incidence or attack of rotating blades
    • F05D2260/76—Adjusting of angle of incidence or attack of rotating blades the adjusting mechanism using auxiliary power sources
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy

Definitions

  • the present invention relates to an operating device for propellers, turbine wheels, and pump wheels having rotatable blades or vanes.
  • Screws or wheels of this kind, the blades or vanes of which are rotatable while in operation, are now used in Kaplan turbines, turbine pumps, and blowers, and as propellers for ships and aircraft, and are usually placed in such manner that it is impossible to observe directly the position of the rotatable blades or vanes.
  • rotation of the blades is effected by means of a servomotor with an associated control valve,.as is often the case, it is not possible to ascertain the position of the blades from the position of the operating lever.
  • the invention consists principally in the member-the slide or the slide seatof the control valve which is connected to the movable member--i. e. the piston or the cylinder-of the servomotor, being provided with stops serving to limit the movement of the other the servomotor and thus also the position of the Preferably, an elastic or rerotatable blades.
  • silient coupling is interposed between the member of the control valve actuated by the impulses and the operating lever or the like which serves to give the control impulses, while the member of the regulating valve actuated by the impulses is connected through a non-elastic motion transmitting device with an indicator or pointer device which indicates the position of the rotatable blades.
  • Fig. 1 shows an axial section through the hub of a propeller
  • Fig. 2 shows an axial section through a portion of the propeller shaft
  • Fig. 3 shows diagrammatically an assembly of the entire operating and indicating device
  • Fig. 4 shows a side view of the indicator proper.
  • Fig. 5 shows to a larger scale the elastic coupling.
  • Fig. 6 shows an axial section through a modified constructional form of the invention.
  • Fig. '7 shows a modified detail of the stops.
  • I denotes the hub body which is rigidly connected to the hollow propeller shaft 2.
  • the hollow piston rod 5 Fitted in bushings 3 and 4 in said two members is the hollow piston rod 5 which is movable in the axial direction.
  • the servomotor piston 8 Secured to the left-hand end of said rod, as viewed in Fig. 1, is the servomotor piston 8 which is slidable in the servomotor cylinder 1., which is closed by means of the head 8 the outer portion of which is formed as a hub cone 9.
  • l0 denotes one of the propeller blades which is journalled by means of its flange and the crank pin .ring II, on a ring l2 secured to the hub body I,
  • the blade is rotatable on an axis perpendicular to the axis of the hub body.
  • crank pin H Secured to the crank pin ring II is a crank pin H which is journalled in a slide block I! that is slidable in a slot in a projection from the piston rod 5, said slot extending at right angles to the axis of the rod.
  • a sleeve i5 Secured in the left-hand end of the hollow piston rod 5 is a sleeve i5 which forms a seat for the hollow control valve slide I6 which is slidable in the axial direction. Said slide I6 is attached to the slide rod [8 which extends through the hollow propeller shaft 2, and which also is hollow so that liquid under pressure may be supplied through the same for actuating the servomotor.
  • the portion of the slide l6 located within the sleeve i5 is provided with three circumferential grooves Ilia.
  • sleeve l8 and piston rod 8 there are also provided radial ports 2
  • These grooves and ports in the slide, the sleeve, and the piston rod are so arranged and so placed relatively to each other that when the slide l8 is displaced some distance in one direction or the other, liquid under pressure is supplied to the chamber on the right-hand side or on the left-hand side of the servomotor piston 8, in such manner that the piston is caused to move in the same direction as the slide l8, which is thus hydraulically connected, as it were, with the servomotor piston.
  • the portion of the control valve l8, IS in this case the sleeve 18, which is connected to the movable member of the servomotor, that is to say, in the instance illustrated, the servomotor piston 8, is provided with two stops 21 and 28 which serve to limit the motion of the slide l8 in such manner that the slide can only move a very short distance relatively to the sleeve ii.
  • the slide 13 is provided, at its left-hand end in Fig. 1, with a stop flange 29 which is situated between the two stops 21 and 28 and is so dimensioned that there is a certain play between the same and the said stops, This play thus determines the range of movement of the slide it relatively to the sleeve I8.
  • each position of the piston 8 corresponds to a certain position of the propeller blades, and since the slide l8 accompanies the piston, the position of the slide l8 corresponds to the position of the propeller blades.
  • This fact is utilized, according to the invention, by the movement of the slide l8 and of the slide rod l8 connected thereto being made visible outside the propeller shaft, preferably by the aid of the arrangement illustrated in Figs. 2 to 5, inclusive.
  • the hollow propeller shaft 2 is connected through a coupling 38 with the engine, which is not shown, and is journalled in a bearing 3
  • the slide rod I8 is slidable in a bushing 32 provided in the hollow propeller shaft, the left-hand end of said bushing being shaped as a pressure liquid inlet 33 which puts the stationary liquid supply pipe 330. in communication with the bore of the slide rod l8, the space 28 between the slide rod I8 and the propeller shaft 2 being in communication with the stationary liquid discharge pipe 331).
  • the slide rod 18 is moved by means of an entrainer 34 which is connected through a ball bearing with a ring 35 provided outside the propeller shaft and rotatable relatively to the same, in such manner that the slide rod Hi can be moved axially by axial displacement of said ring.
  • the said ring 35 is pivotally attached to a forkshaped lever 36a, Fig. 3, which is pivoted at 36, and which in its turn is pivoted to a resilient or elastic coupling 31.
  • the said coupling 31 is connected through a transmission wire with an operating lever 38 which is pivoted on a stationary pivot 39 in a bracket 40, Fig. 4.
  • Also pivoted on said pivot 39 is a pointer 4
  • the elastic coupling 31 which is shown to a larger scale and in longitudinal section in Fig. 5, consists of two rods 43 and 44 rigidly connected to one another, and which are slidable in a sleeve which consists of two short sleeves 45 and 46 rigidly connected to one another by means of a tube t1.
  • Slidably mounted on the inner reduced portion 48 of the rod 43 are two spring washers 49 and 5! between which a compression spring 5
  • Said spring normally maintains the washers in the positions shown in Fig. 5, the washer d9 bearing against the thicker portion of the rod 43 as well as against the inner end of the sleeve 45, and the washer 50 bearing against the inner ends of the rod 44 and of the sleeve 48.
  • the tube 41 is pivoted by means of pins to the shanks of the lever 38a, as indicated in Fig. 5.
  • a wire llll extends to one end of a two-armed lever 52, Fig. 3, from the other end of which a second wire I02 runs over a pulley 53 to one arm 54a of a two-armed lever rigidly connected to the operating lever 38.
  • a third wire I03 extends from the rod 44 over a pulley 54 to the other arm 54b of the two-armed lever connected to the operating lever 38. In this way the operating lever 38 is thus resiliently connected to the lever 38a.
  • the sleeve 45 is connected through a wire 14 running over pulleys I05 and I06 to the right-hand arm I01 of a twoarmed lever rigidly connected to the pointer 4
  • the described arrangement operates in the following manner.
  • the operating lever 34 is shown in Fig. 3 as occupying its middle or zero position, in which also the servomotor piston occupies its middle position, and the propeller blades iii are so adjusted that they are inoperative. Also the pointer 4
  • lever 35 is turned to the right in Fig. 3, for going ahead, and is flxed in the position to which it has been moved, the rods 43 and 44 which are rigidly connected, are also moved to the right in Fig. 5.
  • the rod 43 brings along the washer 49 so that the spring 5
  • the ring 35 is moved to the right in Figs. 2 and 3 on the propeller shaft and brings along the slide rod 18 and the slide I6.
  • the port 20 in the slide is put in communication with the port 22 in the piston rod, so that pressure liquid is supplied to the chamber on the left-hand side of the servomotor piston 5, liquid being simultaneously discharged from the chamber on the right-hand side of the piston 6 through the ports 2
  • the piston 6 thus starts moving to the right in Fig. 1, and begins to adjust the propeller blades ill for running ahead.
  • the stop flange 29 strikes against the stop 21, as above explained, after which the slide, which is under the influence of the pressure of the spring 5
  • the pointer 41 will, therefore, stop right opposite the pointer 38a on the operating lever 38 as soon as the desired adjustment of the propeller blades has been effected.
  • the described operating device thus enables the commander of the ship by a simple movement of the operating member to effect a certain desired adjustment of the propeller blades, and afterwards by the aid of the indicator device to make sure that the propeller blades have actually been set in the desired position.
  • the servomotor with the associated control valve 18, I5 is provided in the propeller hub.
  • This construction is probably most suitable in practice, in view of the fact that the large forces which are set up when shifting the position of the propeller blades are taken up directly by the hub body and need not be transmitted through the propeller shaft. It will be understood, however, that the invention may also be applied to such constructions in which the servomotor is built into the propeller shaft. A construction of this kind is shown in Fig. 6.
  • the hollow propeller shaft 2 is rigidly connected to th servomotor cylinder 55 which in its turn is connected to the driving shaft 56.
  • the servomotor piston 51 is attached to the heavy piston rod 58 which is movable axially in the bushing 59.
  • the movements of the piston rod 58 in the axial direction are transmitted to the propeller blades in the same way as according to Fig. l by means of slide blocks and crank pins.
  • the ring 5? which corresponds to the ring 35 in Figs. 2 and 3, and which is slidable on the propeller shaft 2, is in this construction connected directly to the slide 62 which is slidable in the servomotor cylinder 55 and passes through a bore in the piston 51.
  • the function of the slide 52 corresponds to that of the slide 16 in Fig. l.
  • the slide 52 carries at its end the stop flange Bl which cooperates with the two stops 11 and 18 which are provided in a member 19 secured to the piston 51.
  • the servomotor piston is also guided by a guide rod 63 which is secured in the servomotor cylinder and extends through a bore in the piston on the side of the piston rod 58 remote from the slide 62.
  • the pressure liquid required for the operation is supplied to the hollow propeller shaft 2 through the pipe 64 and flows through the passage 65 to an axial passage 65a in the slide 52, the displacement of which effects distribution of the liquid through the passages 66 and 61 to the chambers on either side of the piston 51.
  • the pressure liquid discharges through the passage 68 in the piston 51 and through the axial passage 69 in the piston rod 58 to the discharge pipe 10.
  • Fig. 7 shows a modified constructional form of the two stops which, according to this construction, are made resilient or elastic so that when an impulse force greater than normal is used, said stops can yield somewhat and allow the impulseoperated control slide to move a somewhat greater distance relatively to the part of the control valve that is connected to the movable part of the servomotor.
  • are provided between the stops, as shown in Fig. 7, which washers may consist, for instance, of rubber or resilient sheet metal.
  • the said elastic stops allow the control slide to move so great a distance that the particles of dirt can be brought along by the pressure liquid and be removed.
  • the elastic washers may be made of such thickness that there is no play between the same and the stop flange, so that the washers must begin to yield immediately upon displacement of the slide.
  • a servomotor for a machine element on a shaft, a servomotor, part of which is located in said shaft so as to rotate with the same, said servomotor consisting of a cylinder and a piston, one of said members being movable and connected to said machine element, a control valve associated with said servomotor and comprising two members, one of said members being connected to the movable member of said servomotor so as to move in unison with the same, stops provided on said member of the control valve connected to said movable member of the servomotor and adapted to restrict motion of the second member of the control valve in such manner that said second member is capable of moving only a short distance relatively to the first mentioned member of the control valve, an operating lever, an elastic coupling connecting said operating lever to said second member of said control valve and holding said second member during its movement by the first member against one of said stops, an indicator,-and nonelastic motion transmitting means connecting said indicator to said second member of said control valve.
  • a servomotor part of .which is located in said shaft so as to rotate with the same, said servomotor consisting of a cylinder and a piston, one of said members being movable and connected to said machine element, a control valve associated with said servomotor and comprising two members, one of said members being connected to the movable member of said servomotor so as to move in unison with the same, stops provided on said member of the control valve connected to said movable member of the servomotor and adapted to restrict motion of the second member of the control valve in such manner that said second member is capable of moving only a short distance relatively to the first mentioned member of the control valve, an operating lever, an elastic coupling connecting said operating lever to said second member of said control valve and holding said second mem-- ber during its movement by the first member aaginst one of said stops, a pointer, and nonelastic motion transmitting means connecting said pointer to said second member of said control
  • a servomotor part of which is located in said shaft so as to rotate with the same, said servomotor consisting of a cylinder and a piston, one of said members being movable and connected to said machine element,
  • a servomotor part of which is located in said shaft so as to rotate with the same, said servomotor consisting of a cylinder and a piston, one. of said members being movable and connected to said machine element, a control valve associated with said servomotor and comprising two members, one of said mem bers being connected to the movable member of said servomotor so as to move in unison with the same, stops provided on said member of the control valve connected to said movable member of the servomotor and adapted to restrict motion of the second member of the control valve in such manner that said second member is capable of -moving only a short distance relatively to the first mentioned member of the control valve, an operating lever connected to the second member of said control valve, and an indicator connected to said second member of said control valve.
  • a hydraulic operating device for. a machine element on a shaft, a servomotor, part of which is located in said shaft so as to rotate with the same, said servomotor consisting of a cylinder and a piston, one of said members being movable and connected to said machine element, a control valve associated with said servomotor and comprising two members, one of said members being connected to the movable member of said servomotor so as to move in unison with the same, stops provided on said member of the control valve connected to said movable member of the servomotor and adapted to restrict the motion of the second member of the control valve in such manner that said second member is capable of moving only a short distance relatively to the first mentioned member of the control valve, and means connected to the second member of said control valve for operating the same, said means also serving as an indicator for the position of said movable member of the servomotor and thus of said machine element.
  • a servomotor part of which is located in said shaft so as to rotate wit-h the same
  • said servomotor consisting of a cylinder and a piston, one of said members being movable and connected to said adjustable blade

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Textile Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Transmission Devices (AREA)
  • Hydraulic Motors (AREA)
US184512A 1937-01-15 1938-01-12 Operating device for propellers, turbine wheels, and pump wheels having rotatable blades Expired - Lifetime US2244770A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
SE9387237 1937-01-15
FR837580T 1938-05-05
NL87705A NL50341C (enrdf_load_stackoverflow) 1937-01-15 1938-05-05
DE1938E0051125 DE694029C (de) 1937-01-15 1938-05-06 Steuervorrichtung fuer Propeller, Turbinen und Pumpenraeder mit verstellbaren Fluegeln

Publications (1)

Publication Number Publication Date
US2244770A true US2244770A (en) 1941-06-10

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Application Number Title Priority Date Filing Date
US184512A Expired - Lifetime US2244770A (en) 1937-01-15 1938-01-12 Operating device for propellers, turbine wheels, and pump wheels having rotatable blades

Country Status (6)

Country Link
US (1) US2244770A (enrdf_load_stackoverflow)
BE (1) BE430414A (enrdf_load_stackoverflow)
DE (1) DE694029C (enrdf_load_stackoverflow)
FR (1) FR837580A (enrdf_load_stackoverflow)
GB (1) GB493416A (enrdf_load_stackoverflow)
NL (1) NL50341C (enrdf_load_stackoverflow)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2423191A (en) * 1942-06-18 1947-07-01 Kopp Jean Control apparatus for variable pitch propeller adjusting devices
US2472836A (en) * 1946-07-31 1949-06-14 Earnest R Kennedy Reversible propeller
US2501720A (en) * 1943-12-24 1950-03-28 Rotol Ltd Screw propeller
US2513546A (en) * 1944-12-02 1950-07-04 Sulzer Ag Fluid operated propeller pitch controlling mechanism
US2518925A (en) * 1946-04-30 1950-08-15 Hydro Mecanique Turbine
US2528901A (en) * 1944-10-06 1950-11-07 John F Morse Combined manual and follow-up pressure fluid power unit
US2551246A (en) * 1946-01-30 1951-05-01 Bendix Aviat Corp Fluid motor
US2635700A (en) * 1942-11-05 1953-04-21 United Aircraft Corp Propeller control
US2661807A (en) * 1949-04-28 1953-12-08 Sterling A Fielding Hydraulic pitch control device for propellers
US2671518A (en) * 1950-03-28 1954-03-09 Gen Motors Corp Hydraulic motor actuated marine propeller pitch control
US2679233A (en) * 1946-10-07 1954-05-25 Liaaen Nils Johannes Shaft-housed servomotor of the follow-up type
US2731951A (en) * 1956-01-24 Fluid transfer connection between a fixed
US2786539A (en) * 1948-11-26 1957-03-26 Harry J Nichols Controllable-pitch propeller system
US2798564A (en) * 1952-06-30 1957-07-09 John H Strandell Mechanical controllable pitch propeller
US3002486A (en) * 1957-11-30 1961-10-03 Karlstad Mekaniska Ab Steering propeller
US3711221A (en) * 1969-06-06 1973-01-16 Saab Scania Ab Device for varying the pitch of propeller blades
US4893989A (en) * 1989-03-07 1990-01-16 United Technologies Corporation Variable propeller system incorporating a forward transfer bearing

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2498109A (en) * 1944-11-06 1950-02-21 Canadian Car And Foundry Compa Variable pitch propeller
US2686569A (en) * 1952-06-30 1954-08-17 Jr Tracey K Bruce Hydraulic controllable pitch propeller
US2693243A (en) * 1952-07-23 1954-11-02 John H Strandell Double crank controllable pitch propeller
FR1110184A (fr) * 1953-10-26 1956-02-07 Karlstad Mekaniska Ab Moyeu pour hélices, pompes ou turbines hydrauliques comportant des pales à pas variable
NL292086A (enrdf_load_stackoverflow) * 1962-06-01
DE1295412B (de) * 1966-02-22 1969-05-14 Glacier Co Ltd Hohle Schiffsschraubennabenhaube als Auftriebskammer
DE4306133A1 (de) * 1993-02-27 1994-09-01 Klein Schanzlin & Becker Ag Verstelleinrichtung hydraulischer Art
DE4306140A1 (de) * 1993-02-27 1994-09-01 Klein Schanzlin & Becker Ag Hydraulische Verstelleinrichtung
CN102653314B (zh) * 2012-05-18 2014-04-23 苏州船用动力系统股份有限公司 侧向推进器的反馈装置
DE102022128671A1 (de) * 2022-10-28 2024-05-08 Rolls-Royce Deutschland Ltd & Co Kg Zahnradpumpe, Antriebsvorrichtung und Verstellpropeller

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2731951A (en) * 1956-01-24 Fluid transfer connection between a fixed
US2423191A (en) * 1942-06-18 1947-07-01 Kopp Jean Control apparatus for variable pitch propeller adjusting devices
US2635700A (en) * 1942-11-05 1953-04-21 United Aircraft Corp Propeller control
US2501720A (en) * 1943-12-24 1950-03-28 Rotol Ltd Screw propeller
US2528901A (en) * 1944-10-06 1950-11-07 John F Morse Combined manual and follow-up pressure fluid power unit
US2513546A (en) * 1944-12-02 1950-07-04 Sulzer Ag Fluid operated propeller pitch controlling mechanism
US2551246A (en) * 1946-01-30 1951-05-01 Bendix Aviat Corp Fluid motor
US2518925A (en) * 1946-04-30 1950-08-15 Hydro Mecanique Turbine
US2472836A (en) * 1946-07-31 1949-06-14 Earnest R Kennedy Reversible propeller
US2679233A (en) * 1946-10-07 1954-05-25 Liaaen Nils Johannes Shaft-housed servomotor of the follow-up type
US2786539A (en) * 1948-11-26 1957-03-26 Harry J Nichols Controllable-pitch propeller system
US2661807A (en) * 1949-04-28 1953-12-08 Sterling A Fielding Hydraulic pitch control device for propellers
US2671518A (en) * 1950-03-28 1954-03-09 Gen Motors Corp Hydraulic motor actuated marine propeller pitch control
US2798564A (en) * 1952-06-30 1957-07-09 John H Strandell Mechanical controllable pitch propeller
US3002486A (en) * 1957-11-30 1961-10-03 Karlstad Mekaniska Ab Steering propeller
US3711221A (en) * 1969-06-06 1973-01-16 Saab Scania Ab Device for varying the pitch of propeller blades
US4893989A (en) * 1989-03-07 1990-01-16 United Technologies Corporation Variable propeller system incorporating a forward transfer bearing

Also Published As

Publication number Publication date
FR837580A (fr) 1939-02-14
DE694029C (de) 1940-07-24
NL50341C (enrdf_load_stackoverflow) 1941-04-17
BE430414A (enrdf_load_stackoverflow) 1938-10-31
GB493416A (en) 1938-10-07

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