US2223024A - Tamping machine - Google Patents

Tamping machine Download PDF

Info

Publication number
US2223024A
US2223024A US155834A US15583437A US2223024A US 2223024 A US2223024 A US 2223024A US 155834 A US155834 A US 155834A US 15583437 A US15583437 A US 15583437A US 2223024 A US2223024 A US 2223024A
Authority
US
United States
Prior art keywords
machine
stabilizing
springs
impulse
vibrating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US155834A
Inventor
Beierlein Karl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Losenhausenwerk Duesseldorfer Maschinenbau AG
Original Assignee
Losenhausenwerk Duesseldorfer Maschinenbau AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Losenhausenwerk Duesseldorfer Maschinenbau AG filed Critical Losenhausenwerk Duesseldorfer Maschinenbau AG
Application granted granted Critical
Publication of US2223024A publication Critical patent/US2223024A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/02Improving by compacting
    • E02D3/046Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil
    • E02D3/074Vibrating apparatus operating with systems involving rotary unbalanced masses
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/22Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for consolidating or finishing laid-down unset materials
    • E01C19/30Tamping or vibrating apparatus other than rollers ; Devices for ramming individual paving elements
    • E01C19/34Power-driven rammers or tampers, e.g. air-hammer impacted shoes for ramming stone-sett paving; Hand-actuated ramming or tamping machines, e.g. tampers with manually hoisted dropping weight
    • E01C19/38Power-driven rammers or tampers, e.g. air-hammer impacted shoes for ramming stone-sett paving; Hand-actuated ramming or tamping machines, e.g. tampers with manually hoisted dropping weight with means specifically for generating vibrations, e.g. vibrating plate compactors, immersion vibrators
    • 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
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00Machine element or mechanism
    • Y10T74/18Mechanical movements
    • Y10T74/18056Rotary to or from reciprocating or oscillating
    • Y10T74/18344Unbalanced weights

Definitions

  • This invention relates to a tamping machine and its primary object is to make a machine of this kind which can be more easily handled and is more efficient than such machines have been heretofore.
  • the arrangement described is secured'by utilizing the motor which drives the impulse device as a substantial part of the stabilizing mass.
  • a progressive movement can be imparted to the machine by changing the angleof the direction of the impulses and the speed and direction of this movement of the machincan Ibe controlled by manipulative means mounted upon the stabilizing part of the machine.
  • the transmission ofthe forces for controlling the speed of movement of theI machine may be taken care of by the interposition of elastic devices, such as springs between the manipulative means and the impulse device.
  • thestabilizing part of the machine can also be connected to the vibrating part by elastic means, such as springs, to maintain a more or less constant relative angular position in the horizontal plane.
  • the massive stabilizing part of the machine and the vibrating part for instance the tamping plate, can be so formed that a easing of the former part overhangs a flange, or the like,
  • Fig. l is a vertical section
  • Fig. 2 is a plan view with the upper part of the casing removed andlpart of the engine base plate broken away.
  • the ground plate which rests upon the matei rial to be compacted is indicated at I.
  • I In a bear.- in'g 2 on the top of this yplate is pivotally supported an impulse generating device 3 comprising acasing' 4 containing two rotary unbalanced weights 5 and 6. These weights are fixed to shafts I and 8 geared together by meshing pinions 9 and I0. The weights are rotated by a driving mechanism to be presently described and are made to rotate oppositely by the intermeshing pinions 9 and IU, so that lateral forces generated by the weights are balanced, while forces in the direction tangent to the pitch .Y circles of the pinions 9 and IIJ are unbalanced. This type of impulse generating mechanism is well known per se.
  • the driving motor I3 forms a considerable part, if not the greatest part, of the sprung mass of the machine.
  • par-t preferably upon the base plate I2, is mounted a manipulative device for controlling the speed and direction of movement of the machine.
  • this manipulative device is in the form of a steering column 22 fixed to a support 23 and containing a shaft 24 which can Upon the sprung or stabilizing be rotated by a handwheel 25.
  • the shaft 24 is connected by a universal joint 26 with a screw spindle 21 mounted in bearings 28 and/29 upon the base plate I2. 2l and is connected by springs 3l with an ear 32 .on the housing 4 of the impulse device.
  • the impulse device By turning the yhandwheel 25l the impulse device can be made to rock upon its bearing 2 to change the inclination ofthe impulses. In thisI way a A nut 30 travels upon spindle lit ⁇ simple adjustment ofthe direction of applica- 'tion of the force ot the impulse device, and thereby of the speed of forward movementfof the' machine is ⁇ provided for.
  • the stabilizing part of the machine is furthermore connected with the vibrating part by springs 33, stretched between eyes 34 on a downwardly"y extending skirt 35 of base plate I2 to eyes 36 on the ground plate I;
  • These springs 33 control-'the relative rotation ofthe two parts of the machine in the "horizontal plane and in this way lateral movement of the steering column 22 turns not only lthe sprung upper part of the machine, but in thecourseof the vibrating movements also the under part resting upon the earth, thereby setting the underpart in the desired direction for g its progressing movement.
  • the whole 1 upper part of the machine is preferably covered by a hood, one portion of which is constituted by the skirt 35 ofthe plate
  • the skirt 35 overhangs la flange 4I extending u'p from the groundplate
  • a tamping machine comprising a vibrating ground engaging part and a relatively massive stabilizing part, springs supporting said stabiliz- .ing part on said ground engaging part, said lative means on said stabilizing part, and spring connections between said manipulative means and said impulse generating means for adjusting the latter.
  • A'tamping machine comprising a vibrating ground engaging part and a. relativelymassive stabilizing part, springs supporting said-stabiliz Ving part 'on said ground engaging. part, said springs having a characteristic such as to permit a relative movement of considerable amplitude between said two parts of the machine, said vibrating part comprising an limpulse generating device, said stabilizing; partcomprising, as a preponderant part of its mass, a motor located directly.
  • a motor located directly above said impulse generating device, elastic driving connections between said motor and said impulse generating device, a skirton said stabilizing pa-rt extending downward around said supporting springs and ⁇ said impulse generating device, and a flange on said lvibrating ⁇ part surrounding ⁇ said supporting springs and saidl impulse .generating device and extending up inside said skirt.

Description

Patented Nov. 26, 1940 i PATENT OFFICE TAMPING MACHINE Karl Beierlein, Dusseldorf, Germany, assignor lto Losenhausenwerk Dsseldorfer Maschinenbau A. G., Dusseldorf-Grafenberg, Germany, a corporation of Germany Application July 2c, 1937, serial No. 155,834 In Germany September 1 4, 1936 3 Claims.
This invention relates to a tamping machine and its primary object is to make a machine of this kind which can be more easily handled and is more efficient than such machines have been heretofore.
The operation of early tamping machines has been interfered with by a tendency to dance, rendering many of the impulses ineffective and making the machine difficult to handle. This tendency is controlled by connecting the vibrating part of the machine by springs to a heavy stabilizing mass, the said vibrating part being relatively light.
In accordance with one featureof this invention the arrangement described is secured'by utilizing the motor which drives the impulse device as a substantial part of the stabilizing mass.
In accordance with another feature of the invention a progressive movement can be imparted to the machine by changing the angleof the direction of the impulses and the speed and direction of this movement of the machincan Ibe controlled by manipulative means mounted upon the stabilizing part of the machine. The transmission ofthe forces for controlling the speed of movement of theI machine may be taken care of by the interposition of elastic devices, such as springs between the manipulative means and the impulse device. For controlling the direction of movement of the machine thestabilizing part of the machine can also be connected to the vibrating part by elastic means, such as springs, to maintain a more or less constant relative angular position in the horizontal plane.
In accordance with another feature of the invention the massive stabilizing part of the machine and the vibrating part, for instance the tamping plate, can be so formed that a easing of the former part overhangs a flange, or the like,
upon the latter part. y
By the described arrangement 'of the motor upon the stabilizing part of the machine several advantages'are achieved. The weight of the v1- brating parts, and therewith the weight of the whole machine, are considerably reduced, while the motor is protected against harmful vibrations. Furthermore, the possibility is presented 1 of mounting all the handles required for controlling the driving means of the machine upon the stabilizing part, which is relatively still. The proposed means for transmitting the controlling forces for the speed and directionof movement of the machine make it lpossible to mount not only the aforesaid control members, but all the control members upon the relatively quiet part of l the machine. Finally, the interengaging arrangement of the two parts aifords a protection against penetration of dirt into the vulnerable driving mechanism,` which is a very yimportant desideratum in this type of machine. -l One illustrative form ofthe invention is shown in the drawing.
Fig. l is a vertical section, while Fig. 2 is a plan view with the upper part of the casing removed andlpart of the engine base plate broken away.
The ground plate which rests upon the matei rial to be compacted is indicated at I. I In a bear.- in'g 2 on the top of this yplate is pivotally supported an impulse generating device 3 comprising acasing' 4 containing two rotary unbalanced weights 5 and 6. These weights are fixed to shafts I and 8 geared together by meshing pinions 9 and I0. The weights are rotated by a driving mechanism to be presently described and are made to rotate oppositely by the intermeshing pinions 9 and IU, so that lateral forces generated by the weights are balanced, while forces in the direction tangent to the pitch .Y circles of the pinions 9 and IIJ are unbalanced. This type of impulse generating mechanism is well known per se. By means of springs II there is mounted on the ground plate I a `base plate I2 for a driving `motor I3. A pulley I4 on the shaft I5 of the motor is connected by an elasticl belt It to a pulley Il mounted by a shaft I8 upon the casing 4 of the impulse generating device. The opposite end of shaft I8 has fixed to it a pulley I9 connected by a belt 20 with a pulley 2| on shaft l.
'Ihe described pulleys and belts constitute the power transmission mechanism by which the motor drives the impulse generating device.
The driving motor I3 forms a considerable part, if not the greatest part, of the sprung mass of the machine. par-t, preferably upon the base plate I2, is mounted a manipulative device for controlling the speed and direction of movement of the machine. Preferably this manipulative device is in the form of a steering column 22 fixed to a support 23 and containing a shaft 24 which can Upon the sprung or stabilizing be rotated by a handwheel 25. The shaft 24 is connected by a universal joint 26 with a screw spindle 21 mounted in bearings 28 and/29 upon the base plate I2. 2l and is connected by springs 3l with an ear 32 .on the housing 4 of the impulse device. By turning the yhandwheel 25l the impulse device can be made to rock upon its bearing 2 to change the inclination ofthe impulses. In thisI way a A nut 30 travels upon spindle lit `simple adjustment ofthe direction of applica- 'tion of the force ot the impulse device, and thereby of the speed of forward movementfof the' machine is` provided for. The stabilizing part of the machine is furthermore connected with the vibrating part by springs 33, stretched between eyes 34 on a downwardly"y extending skirt 35 of base plate I2 to eyes 36 on the ground plate I; These springs 33 control-'the relative rotation ofthe two parts of the machine in the "horizontal plane and in this way lateral movement of the steering column 22 turns not only lthe sprung upper part of the machine, but in thecourseof the vibrating movements also the under part resting upon the earth, thereby setting the underpart in the desired direction for g its progressing movement. Finally, the whole 1 upper part of the machine is preferably covered by a hood, one portion of which is constituted by the skirt 35 ofthe plate |2,"Whi1e the upper portion is formed by a cap y31. ,This capcan be easily removed byunfastening clips 38 pivoted 4to tle skirt 35 at 39 and engaging other pins 40 on the cap 31. The skirt 35 overhangs la flange 4I extending u'p from the groundplate l,
these parts cooperating to prevent-penetrationv r of dirt, orthe like, 'into the machine, while allowing free relative motion in accordance with the vibrations generated by the impulse device.
I claim:
l. A tamping machine comprising a vibrating ground engaging part and a relatively massive stabilizing part, springs supporting said stabiliz- .ing part on said ground engaging part, said lative means on said stabilizing part, and spring connections between said manipulative means and said impulse generating means for adjusting the latter. y
1 2. A'tamping machine comprising a vibrating ground engaging part and a. relativelymassive stabilizing part, springs supporting said-stabiliz Ving part 'on said ground engaging. part, said springs having a characteristic such as to permit a relative movement of considerable amplitude between said two parts of the machine, said vibrating part comprising an limpulse generating device, said stabilizing; partcomprising, as a preponderant part of its mass, a motor located directly. above said impulse generating device, `elastic driving connections between said motor and said impulse generating device, spring connections between said stabilizing part and said` vibrating part adapted yieldingly to resist relative angular movement of said parts in a, horizontal Awhereby it canbe turned horizontally to cause said vibrating part to of said spring connections.
3.A tamping machine'comprising a vibrating ground engaging part and a relatively massive stabilizingpart, springs supporting said stabilizing part on said ground engaging part, saidv springs having a characteristic such as to per-vv mit a relative vmovement of considerable amplitude between said, two .parts of the machine, said vibrating part comprising an impulse generating device, said stabilizing part comprising,
as a preponderant par-t of its mass, a motor located directly above said impulse generating device, elastic driving connections between said motor and said impulse generating device, a skirton said stabilizing pa-rt extending downward around said supporting springs and` said impulse generating device, and a flange on said lvibrating `part surrounding` said supporting springs and saidl impulse .generating device and extending up inside said skirt. f
' KARL BEIERLEIN.
' plane, and a handle on said stabilizingA part Aturn through: the action
US155834A 1936-09-14 1937-07-26 Tamping machine Expired - Lifetime US2223024A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2223024X 1936-09-14

Publications (1)

Publication Number Publication Date
US2223024A true US2223024A (en) 1940-11-26

Family

ID=7990946

Family Applications (1)

Application Number Title Priority Date Filing Date
US155834A Expired - Lifetime US2223024A (en) 1936-09-14 1937-07-26 Tamping machine

Country Status (1)

Country Link
US (1) US2223024A (en)

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2440585A (en) * 1944-06-05 1948-04-27 George W Hutchinson Roller
US2466822A (en) * 1945-06-23 1949-04-12 Iowa Mfg Company Earth compactor
US2599330A (en) * 1947-01-06 1952-06-03 Jackson Vibrators Machine for placement of concrete and the like
US2601277A (en) * 1945-03-03 1952-06-24 George P Green Road machine
US2630048A (en) * 1950-11-14 1953-03-03 Stanley W Marsh Mechanical cement trowel or floater
US2633781A (en) * 1948-01-30 1953-04-07 William P Day Apparatus for road construction
US2643595A (en) * 1947-11-03 1953-06-30 Jackson Corwill Machine for compacting granular mass material
US2644379A (en) * 1946-01-29 1953-07-07 Clarence A Lowe Paving machine
US2737094A (en) * 1951-08-14 1956-03-06 Jackson Vibrators Compactor for asphaltic and other materials
US2792769A (en) * 1953-09-01 1957-05-21 Russell P Harshberger Earth working machine or the like
US2828676A (en) * 1953-07-31 1958-04-01 Steuerman Sergey Means for surface compacting soil, ground and similar granular materials
DE1037976B (en) * 1954-02-05 1958-08-28 Wacker Hermann Device in compression devices for the destruction of the harmful recoil reflected by the media to be compressed
US2902867A (en) * 1950-09-21 1959-09-08 Giertz-Hedstrom Stig Vibration-producing device
US2921475A (en) * 1953-06-29 1960-01-19 Bohn & Kahler Motoren Und Masc Ramming machine
US2938438A (en) * 1955-07-28 1960-05-31 Baldwin Lima Hamilton Corp Vibratory compactor
US2952193A (en) * 1953-09-09 1960-09-13 Frederick J Converse Soil compacting machine
US3001458A (en) * 1956-11-09 1961-09-26 Compactors Engineering Ltd Compactors and the like
US3240134A (en) * 1963-03-29 1966-03-15 John L Mcrae Soil compaction machine
US3256790A (en) * 1962-05-12 1966-06-21 Buckau Wolf Maschf R Self-propelling unit
US3279338A (en) * 1963-06-04 1966-10-18 Master Cons Inc Compactor
US3282372A (en) * 1962-11-14 1966-11-01 Continental Oil Co Direct drive method and apparatus for generating seismic vibratory signals
US3283677A (en) * 1964-09-01 1966-11-08 Wacker Hermann Manually guided motor driven tamping device for earth, concrete and other materials
US3292512A (en) * 1963-10-15 1966-12-20 Schaperclaus Hans Gert Vibrating earth densifying machine
US3336848A (en) * 1965-07-06 1967-08-22 Internat Vibration Company Material compactor
US3342118A (en) * 1961-05-25 1967-09-19 Beierlein Bernhard Tamping device
US3408876A (en) * 1966-12-23 1968-11-05 Charles C. Andrews Car vibrator
US3427939A (en) * 1965-09-13 1969-02-18 Allied Steel Tractor Prod Inc Vibratory compacter
US3871788A (en) * 1972-02-04 1975-03-18 Marshall Fowler Ltd Vibrating roller
US3878733A (en) * 1974-01-15 1975-04-22 Stone Construction Equipment Compactor with directional control for eccentric weights
US4343568A (en) * 1978-12-11 1982-08-10 Benno Kaltenegger Road grading and tamping appliance
US20100028087A1 (en) * 2008-07-29 2010-02-04 Geopier Foundation Company, Inc. Shielded Tamper and Method of Use for Making Aggregate Columns
DE102010029111A1 (en) 2009-05-20 2010-11-25 Dynapac Compaction Equipment Ab Vibrating plate for controlling forward or backward travel direction by operator, has upper assembly with drive motor, base plate, eccentric unit with swivel connection for base plate and driving motor for drive of eccentric unit
US8562258B2 (en) 2008-07-29 2013-10-22 Geopier Foundation Company, Inc. Shielded tamper and method of use for making aggregate columns
CN108035218A (en) * 2017-11-30 2018-05-15 杨仙君 A kind of efficient rammer of municipal construction

Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2440585A (en) * 1944-06-05 1948-04-27 George W Hutchinson Roller
US2601277A (en) * 1945-03-03 1952-06-24 George P Green Road machine
US2466822A (en) * 1945-06-23 1949-04-12 Iowa Mfg Company Earth compactor
US2644379A (en) * 1946-01-29 1953-07-07 Clarence A Lowe Paving machine
US2599330A (en) * 1947-01-06 1952-06-03 Jackson Vibrators Machine for placement of concrete and the like
US2643595A (en) * 1947-11-03 1953-06-30 Jackson Corwill Machine for compacting granular mass material
US2633781A (en) * 1948-01-30 1953-04-07 William P Day Apparatus for road construction
US2902867A (en) * 1950-09-21 1959-09-08 Giertz-Hedstrom Stig Vibration-producing device
US2630048A (en) * 1950-11-14 1953-03-03 Stanley W Marsh Mechanical cement trowel or floater
US2737094A (en) * 1951-08-14 1956-03-06 Jackson Vibrators Compactor for asphaltic and other materials
US2921475A (en) * 1953-06-29 1960-01-19 Bohn & Kahler Motoren Und Masc Ramming machine
US2828676A (en) * 1953-07-31 1958-04-01 Steuerman Sergey Means for surface compacting soil, ground and similar granular materials
US2792769A (en) * 1953-09-01 1957-05-21 Russell P Harshberger Earth working machine or the like
US2952193A (en) * 1953-09-09 1960-09-13 Frederick J Converse Soil compacting machine
DE1037976B (en) * 1954-02-05 1958-08-28 Wacker Hermann Device in compression devices for the destruction of the harmful recoil reflected by the media to be compressed
US2938438A (en) * 1955-07-28 1960-05-31 Baldwin Lima Hamilton Corp Vibratory compactor
US3001458A (en) * 1956-11-09 1961-09-26 Compactors Engineering Ltd Compactors and the like
US3342118A (en) * 1961-05-25 1967-09-19 Beierlein Bernhard Tamping device
US3256790A (en) * 1962-05-12 1966-06-21 Buckau Wolf Maschf R Self-propelling unit
US3282372A (en) * 1962-11-14 1966-11-01 Continental Oil Co Direct drive method and apparatus for generating seismic vibratory signals
US3240134A (en) * 1963-03-29 1966-03-15 John L Mcrae Soil compaction machine
US3279338A (en) * 1963-06-04 1966-10-18 Master Cons Inc Compactor
US3292512A (en) * 1963-10-15 1966-12-20 Schaperclaus Hans Gert Vibrating earth densifying machine
US3283677A (en) * 1964-09-01 1966-11-08 Wacker Hermann Manually guided motor driven tamping device for earth, concrete and other materials
US3336848A (en) * 1965-07-06 1967-08-22 Internat Vibration Company Material compactor
US3427939A (en) * 1965-09-13 1969-02-18 Allied Steel Tractor Prod Inc Vibratory compacter
US3408876A (en) * 1966-12-23 1968-11-05 Charles C. Andrews Car vibrator
US3871788A (en) * 1972-02-04 1975-03-18 Marshall Fowler Ltd Vibrating roller
US3878733A (en) * 1974-01-15 1975-04-22 Stone Construction Equipment Compactor with directional control for eccentric weights
US4343568A (en) * 1978-12-11 1982-08-10 Benno Kaltenegger Road grading and tamping appliance
US20100028087A1 (en) * 2008-07-29 2010-02-04 Geopier Foundation Company, Inc. Shielded Tamper and Method of Use for Making Aggregate Columns
US8128319B2 (en) 2008-07-29 2012-03-06 Geopier Foundation Company, Inc. Shielded tamper and method of use for making aggregate columns
US8562258B2 (en) 2008-07-29 2013-10-22 Geopier Foundation Company, Inc. Shielded tamper and method of use for making aggregate columns
DE102010029111A1 (en) 2009-05-20 2010-11-25 Dynapac Compaction Equipment Ab Vibrating plate for controlling forward or backward travel direction by operator, has upper assembly with drive motor, base plate, eccentric unit with swivel connection for base plate and driving motor for drive of eccentric unit
DE102010029111B4 (en) * 2009-05-20 2014-04-30 Dynapac Compaction Equipment Ab rüttelplatte
CN108035218A (en) * 2017-11-30 2018-05-15 杨仙君 A kind of efficient rammer of municipal construction

Similar Documents

Publication Publication Date Title
US2223024A (en) Tamping machine
US4363377A (en) Active seat suspension control system
US3192839A (en) Adjustable vibration cylinder, notably for road roller
US1943076A (en) Apparatus for working concrete and the like
US3287983A (en) Variable force oscillator
US1896351A (en) Vibrator
US2860783A (en) Vibrating apparatus for handling loose material
US2193419A (en) Portable surfacing machine
US3279338A (en) Compactor
US2921475A (en) Ramming machine
US2697898A (en) Recurrent motion abrading apparatus
US2186114A (en) Massaging device
US3421420A (en) Vibratory road roller with steering arrangement
US2366033A (en) Vibrator
ATE9109T1 (en) VIBRATOR FOR COMPACTION FROM THE GROUND OD. DGL.
US787168A (en) Movement-cure apparatus.
US3269198A (en) Variable thrust oscillator
US208905A (en) Improvement in puncturing-pens
US2618966A (en) Mechanism responsive to variations in the consistency of a fibrous suspension
US3029374A (en) Method and apparatus for automatically adjusting the torque demand on a rotary motor
US3792617A (en) Unbalance vibrator for setting of concrete in sheet-steel-molds of machines for production of concrete-stones or concrete-finished products
US2005917A (en) Means for the production of circular or elliptical oscillations
US2135069A (en) Vibrating screen
SU716536A1 (en) Vibration-type grain cleaner
US1196255A (en) Oscillating fan.