US3796411A - Nutating disc vibrator - Google Patents

Nutating disc vibrator Download PDF

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Publication number
US3796411A
US3796411A US00288291A US3796411DA US3796411A US 3796411 A US3796411 A US 3796411A US 00288291 A US00288291 A US 00288291A US 3796411D A US3796411D A US 3796411DA US 3796411 A US3796411 A US 3796411A
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United States
Prior art keywords
vibrator
disc
working fluid
casing
cavity
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Expired - Lifetime
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US00288291A
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English (en)
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F Gartner
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Individual
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/18—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency wherein the vibrator is actuated by pressure fluid
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H23/00—Percussion or vibration massage, e.g. using supersonic vibration; Suction-vibration massage; Massage with moving diaphragms
    • A61H23/04—Percussion or vibration massage, e.g. using supersonic vibration; Suction-vibration massage; Massage with moving diaphragms with hydraulic or pneumatic drive

Definitions

  • valve means to control the entry and exit of the working fluid, the valve means being contained partly within bearing means for the disc itself.
  • the present invention provides a vibrator comprising a casing, a cavity within the casing, nutating inertia discmeans in the cavity guided by cooperating surfaces of the cavity, and inlet means and outlet means for conducting a working fluid into and out from the cavity wherein said inlet means is positioned in a wall of the casing to direct the working fluid into the cavity along a path lying substantially in the plane of symmetry of the nutating movement of said disc means whereby working fluid directed into the casing by the inlet means will impinge upon the disc means to cause nutating movement thereof,the inlet means and the outlet means further being arranged to conduct the working fluid exclusively through stationary parts of said casing.
  • the location of the inlet means assists in starting the vibrator and the fact that the working fluid is conducted only through the stationary parts of the casing promotes trouble free operation.
  • the working fluid is a compressed gas such as nitrogen bu't compressed air is also satisfactory.
  • the dimensions of the vibrator may vary depending upon the particular application for the vibrator. Furthermore, the speed of nutation of the disc and hence the frequency of vibration can be steplessly varied within a wide range by changing the pressure and consequently the flow rate of the working fluid, for example between and 500 cycles per second.
  • the pressure of a compressed air supply may be varied between 0.5
  • the two supporting elev ments are ball ended rods with the'balls thereof re ceived in sockets in axially opposite faces of the disc and with the rod portions thereof received in conical recesses in the apices of the conical portions. This is a particularly good arrangement for ready starting.
  • the disc is mounted on a central ball which is retained in sockets at the apices of the conical portions.
  • the central ball is movably received in a central opening in the disc and in order to minimise friction the ball is less than one tenth of the diameter of the disc.
  • the disc is carried on ball bearing means or a cylindrical roller bearing on a central shaft carried at its ends in the apices of the conical portions.
  • the outlet means may suitably comprise a plurality of channels connected in parallel with the sum of their cross-sections selected in accordance with the required cross-section of the outlet means. Such a subdivision into separate channels can eliminate the need to provide filter means for preventing the ingress of dirt.
  • the disc may have conical recesses in its axially opposite faces in conformity with the conical portions of the cooperating surfaces or it may be a flat and I2 atmospheres.
  • the proposed vibrator is particularly useful in association with shuttering and formwork in building construction, though in suitably modified form it can also be used for purposes such as massage and the like.
  • the cooperating surfaces in the cavity are so shaped that the outer periphery of the disc is in rolling engagement therewith and this arrangement is particularly suitable for trouble-free operation of the vibrator.
  • At least one side of the disc may be supported by the easing.
  • the cooperating surfaces include two mirror-symmetrical coaxial conical portions projecting inwardly of the cavity. The disc is then positioned between the conical portions so that it can tilt to a posicircular disc.
  • the periphery of the disc may be chamfered to a sharp edge, and preferably the chamfering will be symmetrical on both sides of the disc. It is also contemplated that a channel be provided in the casing wall adjacent the inlet means within the cavity, this channel being equal in length to about half the thickness of the disc. Such a channel extending parallel to the direction of rotation of the disc will provide a satisfactory distribution of working fluid within the cavity and will assist starting of the vibrator.
  • the casing of the vibrator may comprise two elements joined in the region of the plane of symmetry of the nutating movement of the disc.
  • Each element contains mirror-symmetrical concavities defining one overall cavity within the casing and a nozzle may be provided as the entry means for working fluid in the parting plane of the two elements.
  • the nozzle itself can with advantage be constructed so that the cross-section of its orifice increases with rising pressure of the working fluid.
  • Such an arrangement improves the efficiency of the vibrator by reducing the consumption of working fluid in the event of the vibration frequency being controlled by variations in the working pressure.
  • This end is achieved by providing a nozzle mouthpiece which is elastically deformable by the working fluid. The inlet orifice can then be expanded when the pressure of the working fluid rises and the adjusted cross-section will provide an approximately constant velocity of flow of the working fluid.
  • FIG. 1 is a cross-sectional view of the vibrator taken on the line l-1 of FIG. 2
  • FIG. 2 is a plan view of the vibrator shown in FIG. 1
  • FIG. 3 is a cross-sectional view of an alternative disc having no central bearing means
  • FIG. 4 is a detail cross-sectional view of the disc shown in FIG. 1
  • FIG. 5 is a cross-sectional view of another alternative disc provided with a central ball race bearing means
  • FIG. 6 is a cross-sectional view of yet another alternative disc provided with a central ball bearing means
  • FIG. 7 is a detail cross-sectional view showing the edge of a still further alternative disc having a chamfered edge
  • FIG. 8 is a detail cross-sectional view of an entry noz- 'zle for use in the vibrator shown in FIGS. 1 and 2.
  • FIGS. 1 and 2 show a vibrator which in practice may be about four inches in diameter.
  • the vibrator includes a casing comprising two casing members 1 and 2 which engage each other in a plane 9 and are held together by four set-screws 3.
  • a cavity 4 defined by a concave spherical surface 8 and by inwardly projecting lower and upper coaxial conical surfaces 5 and 6.
  • the cavity 4 is symmetrical both about the plane 9 and about the axis of the conical surfaces 5 and 6.
  • an inertia disc 7 of substantially the same diameter as the spherical surface 8.
  • the disc 7 is movable in rotation about its axis and is also tiltable into and out of alignment with the plane 9, this tilting being limited by the axially opposite faces of the disc making line contact with the generators of conical surfaces 5 and 6 respectively.
  • the inlet 10 is shaped to hold a nozzle such as is shown in FIG. 8 and to align the nozzle for directing the working fluid along a path substantially in the plane 9 and to one side of the axis of symmetry of the cavity 4.
  • the disc will be maintained in an inclined position relative to the plane 9 by ball-ended rods 14 and 15.
  • ball-ended rods 14 and 15 engage, with their balLends l6and 17 respectively, hemispherical recesses 18 and 19 centrally located in the opposite faces of the disc 7.
  • the recesses 18 and 19 are shown most clearly in FIG. 4.
  • the rods themselves are received within coaxial conical recesses 12 and 13. in the apices'of the conical surfaces 6 and 5.
  • the nozzle shown in FIG. 8 comprises a body 29 having a screw-threaded portion 28 by which it can be screwed into the inlet 10 shown in FIG. 1.
  • a connector 30 Forward of the screwthreaded portion 28 there is a connector 30 which may be provided with screw threads or be shaped to receive as a push fit over it a mouthpiece 31.
  • the mouthpiece 31 is of elastically deformable material such as rubber or a synthetic plastic and comprises a converging passage 32 terminating in an orifice 33.
  • the size of the orifice 33 depends on the flow rate of working fluid passing through the nozzle so that when the flow rate is increased, the orifice will expand accordingly.
  • a nozzle of this kind a jet of working fluid can be created within the cavity 4. It will be understood however, that the nozzle may also have other applications.
  • FIG. 6 shows an alternative bearing means for the disc 7 comprising a central ball 23 supported within the cavity 4 on the axis of symmetry thereof.
  • the ball 23 is received within recesses 24 and 25 in the apices of the conical surfaces 5 and 6 and the disc 7 is provided with an opening 22 within which the ball 23 is received.
  • a vibrator comprising a casing, a cavity within the casing, nutating inertia disc means in the cavity guided by cooperating surfaces of the cavity, [and] inlet means and outlet means for conducting a working fluid into and out from the cavity wherein said inlet means is positioned in a wall of the casing to direct the working fluid into the cavity along a path lying substantially in the plane of symmetry of the nutating movement of said disc means, whereby working fluid directed into the casing by the inlet means will impinge upon the disc means to cause nutating movement thereof, the inlet means and the outlet means further being arranged to conduct the working fluid exclusively through stationary parts of said casing, and a supporting element guided 'in said casing and connected with said disc means on at least one side thereof.
  • said cooperating surfaces include two inwardly projecting conical portions, said conical portions being disposed each on axially opposite sides of said disc means, each said conical portion being a coaxial mirror image of the other and each said conical portion carrying at its apex a respective supporting element for said disc means, said disc means being tiltable out of said plane of symmetry to a maximum inclination wherein axially opposite faces thereof make line contact each with a respective generator of a respective one of said conical portions.
  • each said supporting element is a ball-ended rod comprising a rod portion carrying a ball at one end, said balls being received each in a respective socket in a respective one of said axially opposite faces of said disc means and said rod portions being received each within a respective conical recess in the apex of a respective one of said conical portions, and bearing against the inside surface of said conical recess.
  • a vibrator as claimed in claim GWhCfElfl said mounting ball is movably received at the centre of the disc means.
  • a vibrator as claimed in claim 1 wherein the out let means comprises a plurality of channels connected in parallel.
  • a vibrator as claimed in claim 1 wherein said casing comprises two elements which contain mirror symmetrical concavities and said entry means is positioned in the region of the parting plane of the two parts.

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  • Health & Medical Sciences (AREA)
  • Rehabilitation Therapy (AREA)
  • Mechanical Engineering (AREA)
  • Epidemiology (AREA)
  • Pain & Pain Management (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Vibration Prevention Devices (AREA)
US00288291A 1972-07-20 1972-09-11 Nutating disc vibrator Expired - Lifetime US3796411A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2235585A DE2235585A1 (de) 1972-07-20 1972-07-20 Vibrationsvorrichtung

Publications (1)

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US3796411A true US3796411A (en) 1974-03-12

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ID=5851146

Family Applications (1)

Application Number Title Priority Date Filing Date
US00288291A Expired - Lifetime US3796411A (en) 1972-07-20 1972-09-11 Nutating disc vibrator

Country Status (10)

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US (1) US3796411A (ja)
JP (1) JPS564401B2 (ja)
AT (1) AT316847B (ja)
CH (1) CH539456A (ja)
DE (1) DE2235585A1 (ja)
FR (1) FR2193335A5 (ja)
GB (1) GB1354647A (ja)
IT (1) IT965358B (ja)
NL (1) NL7212587A (ja)
SE (1) SE382568B (ja)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS564686U (ja) * 1979-06-22 1981-01-16
JPS59120901U (ja) * 1983-01-25 1984-08-15 小千川　敏邦 床拭きスリツパ底
JPS59137103U (ja) * 1983-03-04 1984-09-13 弘進ゴム株式会社 フエルト外底を備えた靴
JPS59148751U (ja) * 1983-03-24 1984-10-04 末松　工一 拭き具
JPS633202U (ja) * 1986-06-24 1988-01-11
JPH0411267U (ja) * 1990-05-18 1992-01-30

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2778612A (en) * 1952-08-09 1957-01-22 Edwin F Peterson Vibratory mechanism
US2960316A (en) * 1958-04-25 1960-11-15 John D Mckellar Fluid driven vibrator
US3266327A (en) * 1964-04-24 1966-08-16 Ni I K I Ispytalelnykh Mash Pr Pneumatic ball-type vibromotor
US3563421A (en) * 1968-08-09 1971-02-16 Standard Pressed Steel Co Vibrating mechanism

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2778612A (en) * 1952-08-09 1957-01-22 Edwin F Peterson Vibratory mechanism
US2960316A (en) * 1958-04-25 1960-11-15 John D Mckellar Fluid driven vibrator
US3266327A (en) * 1964-04-24 1966-08-16 Ni I K I Ispytalelnykh Mash Pr Pneumatic ball-type vibromotor
US3563421A (en) * 1968-08-09 1971-02-16 Standard Pressed Steel Co Vibrating mechanism

Also Published As

Publication number Publication date
CH539456A (de) 1973-07-31
NL7212587A (ja) 1974-01-22
FR2193335A5 (ja) 1974-02-15
JPS564401B2 (ja) 1981-01-30
GB1354647A (en) 1974-06-05
IT965358B (it) 1974-01-31
SE382568B (sv) 1976-02-09
AT316847B (de) 1974-07-25
JPS4937924A (ja) 1974-04-09
DE2235585A1 (de) 1974-02-07

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