US1061206A - Turbine. - Google Patents

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US1061206A
US1061206A US603049A US1911603049A US1061206A US 1061206 A US1061206 A US 1061206A US 603049 A US603049 A US 603049A US 1911603049 A US1911603049 A US 1911603049A US 1061206 A US1061206 A US 1061206A
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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
    • F04D5/00Pumps with circumferential or transverse flow
    • F04D5/001Shear force pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01DNON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D1/00Non-positive-displacement machines or engines, e.g. steam turbines
    • F01D1/34Non-positive-displacement machines or engines, e.g. steam turbines characterised by non-bladed rotor, e.g. with drilled holes
    • F01D1/36Non-positive-displacement machines or engines, e.g. steam turbines characterised by non-bladed rotor, e.g. with drilled holes using fluid friction
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D19/00Axial-flow pumps
    • F04D19/02Multi-stage pumps
    • F04D19/04Multi-stage pumps specially adapted to the production of a high vacuum, e.g. molecular pumps
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S415/00Rotary kinetic fluid motors or pumps
    • Y10S415/91Reversible between pump and motor use

Definitions

  • a fluid possesses, among others, two salient properties,ad hesion and viscosity. Owing to these 'a solid body propelled through such a medium encounters a peculiar impediment known as lateral or skin resistance, which is twofold, one arising from the shock of the fluid against the asperities of the solid substance, the other from internal forces opposing molecular separation. As an ⁇ inevitable consequence al certain amount of the fluid is dragged along by the moving body.
  • the operation is reversible, for if water or air under pressure be admitted to the opening constituting the outlet of a pump or blower as described, the runner is set in rotation ⁇ by reason of the peculiar properties of the fluid which, in its movement through the device', ⁇ imparts its energy thereto.
  • FIG. 1 is a. partial end View
  • Fig. 2 a vert-ical cross-section of a rotary engine or turbine, constructed and adapted to,be operated in accordance with the principles of my invention.
  • the apparatus comprises a runner composed of a plurality of Hat rigid disks 13 of suitable diameter, keyed to a shaft 16, and held in position thereon by a threaded nut 11, a shoulder 12,' and intermediate Washers 17.
  • the disks have openings 14 adjacent to the shaft and spokes 15, which may-'be substantially straight. For'the sake of clearness, but a few disks, with comparatively wide intervening spaces, are illustrated.
  • While traversing the chamber inclosing particles of the' fluid may more turns, or but a part the runner, the complete one or of one turn, the of close calculatlon and graphic representation, but fairly accurate estimates of'turns can be obtained simply*l by determining the number of revolutions required to renew the fluid passing) through the chamber and multiplying'i-t y the ratio between the mean 6o Vspeed of the 'fluid and that of the disks. l
  • the runner is mounted in a casing com-Y the shaft and the runner set in rotation say path followed being capable4 menace formance of such machines augments at an exceedingly highA rate with the increase of their size and speed of revolution.
  • the dimensions of the device as a whole, and the spacing of the disks in any given machine will be determined by the conditions and requirements of special cases. 'It may be stated that the intervening distance should should be the greater, the largerthe diameter of the disks, the longer the spiral path of the fluid and the greater its viscosity.
  • the spacing should be such that the entire mass of the fluid, before leaving the runner, is accelerated. to a nearly .uniform velobity, not much below that of the periphery of the disks under normal working conditions, and almost equal to it when the outlet is closed and the particles move in concentric circles.
  • the torque is directly proportionate to the square of the velocity of the Huid relatively to the runnerand to the effective areav of the 110 ydisks and, inversely, to thedistance separating them.
  • the machine will, generally, perform its maximum work when the effective speed of the runner is one-half of-that of the fluid; but to attain the highest economy, the relative speed or slip, for any given performance, should be as small as possible. This condition may be to any desired degree approximated by increasingthe act-ive area of and reducing the space between the disks.
  • centrifugal pressure opposing the passage of the fluid
  • the centrifugal pressure may, as already indicated, be made nearly equal to the pressure ot 4supply
  • the inlet section be large, small changes in the speed of revolutlon will produce 'great differences in flow which are further enhanced by the concomitant variations in the length of the spiral path.
  • a self-regulating machine is thus obtained bearing a striking resemblance to a direct-current electric motor in this respect that, with great differences of impressed pressure in a wide open channel the flow of the fluid through the same is prevented by virture of rotation.
  • a machine adapted to be propelled by a Huid consisting in the combination-With a casing having inlet 'and outlet ports at the ieripheral and central portions, respectively, of a rotor having plane spaced surfaces between which theliiuid mayy ioW in natural spirals and* by adhesive and ⁇ viscous action impart its enerQ'v of movement to the rotor, asy described.
  • a machine adapted to be propelled by a fluid comprising a rotor composed of a plurality of plane spaced disks mounted on a shaft.. and open at or near the same, an inclosing casing with a peripheral inlet or inlets, in the plane of the disks, and an outlet or outlets in its central portion, as described.
  • a rotary engine adapted to be propelled by adhesive and viscous action of a continuously expanding fluid comprising in combi- 'nation a casing forming a chamber, an inlet or inlets tangential to the periphery of the same, and an outlet or outlets in its central portion, With a rotor composed of spaced 'E15-eee 4disks mounted on a shaff, Qpenrgatwor; Vnear the same, as described.- .y s .i
  • A- machine adaptedto be propelledby i fluid, consistingin the combination of a plu. y ralityv of disks mounted on a shaft and open;
  • the disks being spaced to4 formpassages through Which'the Huid may How, under the combined influence of-radiall'and tangential forces, in a natural spiral-path. from the periphery toward the .axis of,the'. disks, and im art its energy of movement to -the same by its adhesive and viscous action thereon, as set forth. i
  • a machine adapted' to be propelled by 'a Huid comprising in combination a plurality of spaced disks rotatably mounted yand having plane surfaces, an inclosing casing and ports or passages of inlet and outlet ad- .jacent to the periphery and center of the disks, respectivelv. as setforth.
  • a machine adapted to oe propelled by a fluid comprising in combination a, runner composed of a plurality of disks having plane surfaces and mounted at intervals on a centralshaft, and formed Withopenings near their centers, and means for admitting the propelling Huid int-o the spaces between i the disks at the periphery and discharging it at the center of the same, as set forth.
  • thermo-dynamic converter comprising in combination a series of rotatably mounted spaced disks with plane surfaces, an inclosing casing, inletports at the eripheral portion and outletyports leading from the central portion of the same, as set forth.
  • thermo-dynamic converter comprising in combination a series of rotatably mounted spaced diskswith plane surfaces and having openings adjacent to their central portions, an inclosing casing, inlet ports in the peripheral portion, and outlet ports leading from the central portion of the same, as set forth.
  • NiKoLa TEsLA NiKoLa TEsLA.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Hydraulic Turbines (AREA)

Description

N. TESLA.
TURBINE.
APPLIoATIoH FILED mm1?, 1911.
1,061,206. Patented May 6, 1913.
a@ W l 51 Ilielffomxm S Original application filed October 21,
UNITED STATES PATENT oEEioE.
NIKOIA TESLA, 0F NEW YORK, N. Y.
' TUBBINE Specification of Letters Patent.
1909, Serial No. 523,882. Divided and this application med January 17, 1911. Serial No. 603,049,
Patented May 6, 1913.
To all whom it may concern.'
Be it known that I, NrkoLA TEsLA, a citizen of the United States, residing at ew York, in the county and State of New York, have-invented certainnew and useful Im'- provements in Rotary Engines and lurbines, of which the following is a full, clear, and exact description.`
In the practical application of mechanifcal power. based on the use of fluid as the duction and maintenance of the machines.
lclianical energy through the agency of fluids in a more perfect manner. and by means simpler and 4more economical than those heretofore employed. I accomplish this by causing the propelling fluid to move in 'natural' paths or stream lines of least resistance, free from constraint and disturblance such as occasioned by vanes or kindred devices, and to change its velocity and di- -rectioii of movement by imperceptible degrees, thus avoiding the losses due to sudden variations while the fluid is imparting energy.
It is Well 'known that a fluid possesses, among others, two salient properties,ad hesion and viscosity. Owing to these 'a solid body propelled through such a medium encounters a peculiar impediment known as lateral or skin resistance, which is twofold, one arising from the shock of the fluid against the asperities of the solid substance, the other from internal forces opposing molecular separation. As an `inevitable consequence al certain amount of the fluid is dragged along by the moving body.
in motion, yfor the same reasons, it' is im-W pelled in the direction `of movement. These effects, in themselves, are of daily observation', but I believe that I am the first to apply them in a practical and economical manner in the propulsion of fluids or in. their use as motive agents.
In an application filed by me October 21st, 1909, Serial Number 523,832 of which this case is a division, I have illustrated the principles underlying my discovery as embodied in apparatus designed for t-he propulsion of fluids. The same principles, however, are 'capable of embodiment also in that field of mechanical engineering which is concerned in the use of fluids as motive agents, for while in certain respects the operations in the latter case are directly opposite to those met with in the propul-4 sion of fiuids, and the means employed may differ in some features, the 'fundamental laws applicable in the two.cases are the same. In other words, the operation is reversible, for if water or air under pressure be admitted to the opening constituting the outlet of a pump or blower as described, the runner is set in rotation` by reason of the peculiar properties of the fluid which, in its movement through the device',` imparts its energy thereto. i
The present application, which is a division of that referred to, is specially intended to describe and claim my discovery above set forth, so far as it bears on the use y of fluids as motive agents, as distinguished from the applications of the same to the propulsion or compression of fluids.
In the drawings, therefore, I have illustrated only the form of apparatus designed for the thermo-dynamic conversion of energy, a field in which the applications of the principle have the greatest practical value. v
i Figure 1 is a. partial end View, and Fig. 2 a vert-ical cross-section of a rotary engine or turbine, constructed and adapted to,be operated in accordance with the principles of my invention.
The apparatus comprises a runner composed of a plurality of Hat rigid disks 13 of suitable diameter, keyed to a shaft 16, and held in position thereon by a threaded nut 11, a shoulder 12,' and intermediate Washers 17. The disks have openings 14 adjacent to the shaft and spokes 15, which may-'be substantially straight. For'the sake of clearness, but a few disks, with comparatively wide intervening spaces, are illustrated.
prising two end castings 19, which contain the bearings for the shaft 16, 4indicated but not shown in detail; stufling boxes 21 and outlets 20. The end castings are united by a central ring 22, which is bored out to a circle of a slightly larger diameter than that of the disks, and has flanged extensions 23,
and inlets 24, into which finished ports or in a clockwise direction. Neglecting, for the moment, those features of construction that make for or against the efliciency of the device as a pump, as distinguished from a motor, a fluid, by reason of its properties of ladheren'ce and Viscosity, upon entering through the inlets 20, and coming in contact with the disks 13, is taken hold of by the latter and subjected to two forces, one acting tangentially in the direction of rotation, and the other radially outward.' The combined effect of these tangential and centrifugal forces is topropel the fluid with oontinuously increasing velocity in a spiral path until i't reaches a suitable peripheral youtlet from which it is ejected. This spiral movement, free and undisturbed and essentially ,dependent on Ithe properties of the fluid, permitting it to adjust ltself to natural paths or stream lines and to'change its velocity and direction by insensible degrees, is a characteristic and essential feature of this principle l of operation.
While traversing the chamber inclosing particles of the' fluid may more turns, or but a part the runner, the complete one or of one turn, the of close calculatlon and graphic representation, but fairly accurate estimates of'turns can be obtained simply*l by determining the number of revolutions required to renew the fluid passing) through the chamber and multiplying'i-t y the ratio between the mean 6o Vspeed of the 'fluid and that of the disks. l
have found that the quantity of fluid proelled in this manner, is, other conditions being equal, ap roXimately proportionate to the active sur ace of the runner and to its e5 effective speed. For this reason, the per;
The runner is mounted in a casing com-Y the shaft and the runner set in rotation say path followed being capable4 menace formance of such machines augments at an exceedingly highA rate with the increase of their size and speed of revolution.
The dimensions of the device as a whole, and the spacing of the disks in any given machine will be determined by the conditions and requirements of special cases. 'It may be stated that the intervening distance should should be the greater, the largerthe diameter of the disks, the longer the spiral path of the fluid and the greater its viscosity. In
- general, the spacing should be such that the entire mass of the fluid, before leaving the runner, is accelerated. to a nearly .uniform velobity, not much below that of the periphery of the disks under normal working conditions, and almost equal to it when the outlet is closed and the particles move in concentric circles.
.Considering now the converse of the above 55 'described operation and assuming that fluid under pressure be allowed to pass through the valve at the side of the solid arrow, the runner will be set in rotation in a clockwise direction, the fluid traveling in a spiral path and with continuously diminishing velocity 'until it reaches the orifices 14 and 20, through which it is discharged. lf the runner be allowed to turn freely, in nearly frictionless bearings, its rim will attain a speed closely approximating the maximum of that of the adjacent fluid and the spiral path of the lparticles will be comparatively long, consist.- lng of many almost circular turns. If load is put on and the runner slowed down, the motion of the fluid is retarded, the turns are reduced, and the path is shortened.
Owing to a number of causes affecting the performance, it is difficult to frame a precise rule which would be generally applicable, but it may be stated that withincertain limits, and other conditions being they same, the torque is directly proportionate to the square of the velocity of the Huid relatively to the runnerand to the effective areav of the 110 ydisks and, inversely, to thedistance separating them. The machine will, generally, perform its maximum work when the effective speed of the runner is one-half of-that of the fluid; but to attain the highest economy, the relative speed or slip, for any given performance, should be as small as possible. This condition may be to any desired degree approximated by increasingthe act-ive area of and reducing the space between the disks.
l When apparatus of the kind described is employed for the transmission of power certain departures' from similarity bet-Ween transmitter andl receiver are necessary for securing the best results. It is evident that, when transmitting power from one shaft to another by such machines, any desired ratio between the Speeds of rotation may be obtained b a proper selection of the diameters of tliiedisks, or by suitably staging the 130 transmitter, the receiver or both.V But it may be pointed out that in one res ect, at least, the two machines are essentia 1y different.-In the pump, the radial or static pressure, due to centrifugal force, is added to the tan ential or dynamic, thus increasing rthe e ective head and assisting in the expulsion of the fiuid. In the motor, on the contrary, the first named pressure, being opposed to that of su ply, reduces the effective head and the velocity of radial flow toward the center.` Again, in the propelled machine a great torque is always desirable, this calling for an increasednumber of disks and smaller distance of separation, while in the propelling machine, for numerous economic reasons, the rotary effort should be the smallest and the speed the greatest practicable. Many other considerations, which will naturally suggest themselves, may affect the design and construction, but the preceding is thought to contain all necessary information in this regard.
In order to bring out a distinctive feature. assume, in the first place, that the motive medium is admitted to the disk chamber through a port, that is a channel which it traverses with nearly uniform velocity. In this case, they machine will operate as a rotary engine, the fluid continuously expanding on its tortuous path to the central outlet. The expansion takes place chiefly along the spiral path, for the spread inward is opposed by the centrifugal force due to the velocity of Whirl and by the great resistance to radial exhaust. It is to be observed that the resistance to the passage of the Huid between the plates is, approximately, proportionate to the square of the relative speed, which is maximum in the direction toward the center and equal to the full tangential velocity of the fiuid. The path of least resistance, necessarily taken in obedience to a universalv law of motion is, virtually, also that of least relative velocity. Next, assume that the fluid is admitted to the disk chamber not through a port, but a diverging nozzle, a device converting wholly or in part, the expansive into velocity-energy. The' machine will then work rather like a turbine, absorbing the energy of kinetic momentum of the particles as they whirl, with continuously decreasing speed, to the exhaust.
The above description of the operation, I
may add, is suggested by experience and ob seryation, and 1s advanced merely for the purpose of explanation. The undeniable fact is that the machine does operate, both expansively and impulsively. When `the expansion in the nozzles is complete, or nearly so, the fluid pressure in the peripheralclearance space is small; as the nozzle is made less divergent and its section enlarged, the pressure rises, finally approximating that of a circular bore.
the supply. But the transition from purely lmpulslve to expansive action may not be continuous throughout, on account of critical states and conditions and comparatively great variations of pressure may be caused by small changes of nozzle velocity.
In the preceding it has been assumed that the pressure of supply is constant or continuous, but it will be understood that the operation will be, essentially the same if the pressure be uctuating or intermittent, as that due to explosions occurring in more or less rapidsucpession. i
very desirable feature, characteristic of machines constructed and operated in accordance with this invention, is their capability of reversal of rotation. Fig. 1, while illustrative of a special case, may be regarded as typical in this respect. If the right hand valve be shut ofi' and the iuid supplied through the second pipe, the runner is rotated in the direction of the dotted arrow, the operation, and also the performance remaining the same as before, the central ring being bored to a circle with this purpose in view. The same result may be obtained in many other ways by specially designed valves, ports or nozzles for reversing the flow, the description of which is omitted here in the interest" of simplicity and clearness. For the same reasons but one operative port or nozzle is illustrated which might be adapted to a volute but dees not fit best It will be understood that a number of suitable inlets may be provided around the periphery `of the runner to improve the action and that the construction of the machine may be modified in many Ways.
Still another valuable and probably unique quality of such motors or prime movers may be described. By proper construction and observance of working conditions the centrifugal pressure, opposing the passage of the fluid, may, as already indicated, be made nearly equal to the pressure ot 4supply When the machine is running idle. If a the inlet section be large, small changes in the speed of revolutlon will produce 'great differences in flow which are further enhanced by the concomitant variations in the length of the spiral path. A self-regulating machine is thus obtained bearing a striking resemblance to a direct-current electric motor in this respect that, with great differences of impressed pressure in a wide open channel the flow of the fluid through the same is prevented by virture of rotation. Since the centrifu ral head increases as the square o't` the revo ations, or even more rapidly, and with modern high grade steel rreat peri heral velocities are practicable, 1t is possible tol attain Athat condition in a single stage machine, more readily if the runner be of large diameter. Obviously this problem .is
facilitated by compounding, as will be zun-y -derstoodfbythose skilled in the art; v'Irre- Work are not essential't'o good performance.
In operation it is reliable, there being no valves, sliding contacts or troublesome vanes. It is almost free of Windage, largely independent of nozzle eiiciency and suitable for high as Well as for low `fluid velocities-and speeds of revolution.
It willl be understood that the principles of construction and operation above generally set forth, are capable of embodiment in machines of the most Widely different forms, and ladapted for the greatest variety of purposes. In my present specification I have sought to describe and explain only the general and typical applications of the principle which I believe I am tfhe first to realize and turn to useful account.,
What I claim is:
1. A machine adapted to be propelled by a Huid consisting in the combination-With a casing having inlet 'and outlet ports at the ieripheral and central portions, respectively, of a rotor having plane spaced surfaces between which theliiuid mayy ioW in natural spirals and* by adhesive and `viscous action impart its enerQ'v of movement to the rotor, asy described.
2. A machine adapted to be propelled by a fluid, comprising a rotor composed of a plurality of plane spaced disks mounted on a shaft.. and open at or near the same, an inclosing casing with a peripheral inlet or inlets, in the plane of the disks, and an outlet or outlets in its central portion, as described.
-- 3. A rotary engine adapted to be propelled by adhesive and viscous action of a continuously expanding fluid comprising in combi- 'nation a casing forming a chamber, an inlet or inlets tangential to the periphery of the same, and an outlet or outlets in its central portion, With a rotor composed of spaced 'E15-eee 4disks mounted on a shaff, Qpenrgatwor; Vnear the same, as described.- .y s .i
4. A- machine adaptedto be propelledby i fluid, consistingin the combination of a plu. y ralityv of disks mounted on a shaft and open;
. .withports or passages o finlet and out-le@ at or near the same, and an 'inclosing `casing at the peripheral and centralportions, re" spectively, the disks being spaced to4 formpassages through Which'the Huid may How, under the combined influence of-radiall'and tangential forces, in a natural spiral-path. from the periphery toward the .axis of,the'. disks, and im art its energy of movement to -the same by its adhesive and viscous action thereon, as set forth. i
5. A machine adapted' to be propelled by 'a Huid comprising in combination a plurality of spaced disks rotatably mounted yand having plane surfaces, an inclosing casing and ports or passages of inlet and outlet ad- .jacent to the periphery and center of the disks, respectivelv. as setforth.
` 6. A machine adapted to oe propelled by a fluid comprising in combination a, runner composed of a plurality of disks having plane surfaces and mounted at intervals on a centralshaft, and formed Withopenings near their centers, and means for admitting the propelling Huid int-o the spaces between i the disks at the periphery and discharging it at the center of the same, as set forth.
7. A thermo-dynamic converter, compris y ing in combination a series of rotatably mounted spaced disks with plane surfaces, an inclosing casing, inletports at the eripheral portion and outletyports leading from the central portion of the same, as set forth.
8. A thermo-dynamic converter, comprising in combination a series of rotatably mounted spaced diskswith plane surfaces and having openings adjacent to their central portions, an inclosing casing, inlet ports in the peripheral portion, and outlet ports leading from the central portion of the same, as set forth.
In testimony whereof I aiiix my signature in the presence of two subscribing Witnesses.
NiKoLa TEsLA.
Witnesses: M. LAWSON DYER,
WM. BOHLEBER.
US603049A 1909-10-21 1911-01-17 Turbine. Expired - Lifetime US1061206A (en)

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US3024596A (en) * 1955-03-16 1962-03-13 Strato Missiles Inc Propulsion system with automatic control of fuel and air
US3045428A (en) * 1960-07-06 1962-07-24 Walter G Finch Vortex gas turbine
US3279170A (en) * 1964-06-03 1966-10-18 Clarence R Possell Gas turbine power plant
US3487784A (en) * 1967-10-26 1970-01-06 Edson Howard Rafferty Pumps capable of use as heart pumps
DE1626261B1 (en) * 1962-04-19 1970-10-22 Omark Air Controls Inc Compressed air turbine with air bearings for the direct drive of a tool
US3650632A (en) * 1970-05-05 1972-03-21 John L Shanahan Friction drive rotary engine
US3751908A (en) * 1971-06-23 1973-08-14 Georgia Tech Res Inst Turbine-compressor
US3844113A (en) * 1972-11-02 1974-10-29 H Lockwood Friction impulse gas turbine
US3899875A (en) * 1974-01-16 1975-08-19 Robert A Oklejas Gas regeneration tesla-type turbine
USRE28742E (en) * 1967-10-26 1976-03-23 Pumps capable of use as heart pumps
US4218177A (en) * 1979-08-23 1980-08-19 Robel Robb W Cohesion type turbine
US4402647A (en) * 1979-12-06 1983-09-06 Effenberger Udo E Viscosity impeller
US4493615A (en) * 1982-12-03 1985-01-15 National Research Development Corp. Electro-rheological transducer
US4655679A (en) * 1983-05-25 1987-04-07 Ltv Aerospace And Defense Company Power translation device
US5470197A (en) * 1994-10-28 1995-11-28 Cafarelli; Robert S. Turbine pump with boundary layer blade inserts
US5803733A (en) * 1997-05-06 1998-09-08 Linvatec Corporation Pneumatic surgical handpiece and method
WO2000042291A1 (en) 1999-01-08 2000-07-20 Fantom Technologies Inc. Friction turbine
WO2000042292A1 (en) 1999-01-08 2000-07-20 Fantom Technologies Inc. Separation apparatus comprising a friction machine
US6135708A (en) * 1999-01-08 2000-10-24 Fantom Technologies Inc. Prandtl layer turbine
US6164404A (en) * 1997-06-21 2000-12-26 Hinrichs; Dennis C. Radial torque drive system
US6174127B1 (en) 1999-01-08 2001-01-16 Fantom Technologies Inc. Prandtl layer turbine
US6183641B1 (en) 1999-01-08 2001-02-06 Fantom Technologies Inc. Prandtl layer turbine
US6224325B1 (en) 1999-01-08 2001-05-01 Wayne Ernest Conrad Prandtl layer turbine
US6238177B1 (en) 1999-01-08 2001-05-29 Fantom Technologies Inc. Prandtl layer turbine
US6261052B1 (en) 1999-01-08 2001-07-17 Fantom Technologies Inc. Prandtl layer turbine
US6328527B1 (en) 1999-01-08 2001-12-11 Fantom Technologies Inc. Prandtl layer turbine
US6375412B1 (en) 1999-12-23 2002-04-23 Daniel Christopher Dial Viscous drag impeller components incorporated into pumps, turbines and transmissions
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GB191024001A (en) 1911-07-06
CA135174A (en) 1911-08-22
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US1061142A (en) 1913-05-06
CH54375A (en) 1912-05-17

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