US3342118A - Tamping device - Google Patents

Tamping device Download PDF

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Publication number
US3342118A
US3342118A US553260A US55326066A US3342118A US 3342118 A US3342118 A US 3342118A US 553260 A US553260 A US 553260A US 55326066 A US55326066 A US 55326066A US 3342118 A US3342118 A US 3342118A
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United States
Prior art keywords
tamper
vibrator
tamping device
plate means
tamped
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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
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US553260A
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English (en)
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Beierlein Bernhard
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Individual
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Individual
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Publication of US3342118A publication Critical patent/US3342118A/en
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/02—Improving by compacting
    • E02D3/046—Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil
    • E02D3/074—Vibrating apparatus operating with systems involving rotary unbalanced masses

Definitions

  • the present invention relates to a tamping device, i.e., an apparatus for compacting soil or other loose material, which is suitable for use in construction work such as road building and the like.
  • the present invention relates to a tamping device which incorporates a bottom plate that physically engages the-surface material to be compacted, and vibratory means for vibrating this plate.
  • Tamping devices may be either self-propelled or be pulled by a suitable tractor.
  • the bottom plate, and, more particularly, that portion of the plate which actually engages the surface of the material being compacted is generally flat and has leading and trailing edges fashioned as inclined run-up ramps which are. quite Wide and are intended to prevent the tamping device from becoming embedded in the material. These ramps cannot, however, be considered as constituting part of the actual Working or contact surface of the tamper because they will generally not engage the ma terial, or at best, contact only the top-most material or obstacles embedded within the material over which the tamper is supposed to pass.
  • a tamper which overcomes the above disadvantage, namely, a tamper which, without changing the energy input to the driving means, will deliver an increased specific pressure with increased density of the material, i.e., a tamper which will automatically and in herently exert a higher pressure per unit area on more tightly packed material than on loose material.
  • This is accomplished by making at least the actual engaging portion which contacts the surface of the material 'to be tamped convex With respect to the surface of the material, with the curvature of the engaging portion being such that the area of this portion which actually touches the surface of the material is dependent on the density of the material.
  • the tamper will, thanks to its curved engaging portion, ride more deeply in loose material than in compact material, so that, in loose material, the area of the engaging plate actually contacting the surface will be greater than if the engaging portion rides in compact material. Since the weight of the tamper remains constant, the pressure per unit area will be higher when the tamper rides high in compact material, than when it rides low in relatively loosely packed material.
  • Another feature of the present invention concerns itself with the self-propulsion of a temper.
  • Existing tempers use, as the vibratory means, a rotary vibrator, i.e., an unbalance which is mounted for rotation about an axis transverse to the direction of travel of the tamper which latter will of course not of the former.
  • the transverse axis of the rotary vibrator is located sutficiently high above the engaging portion touching the surface of the material being tamped, and if this axis is so located that the angle which is formed between the engaging portion and a line passing through the axis and the center of the length of the engaging-portion, considered in the direction of travel of the tamping device, is of appropriate size, the direction of rotation of the vibrator has substantially no infiuence on the direction of travel.
  • Such an arrangement may incorporate either a convex engaging portion, as described above, or a substantially fiat engaging portion produce the advantages Such an arrangement offers advantages unknown to the prior art.
  • FIGURE 1 is a sectional elevation of one embodiment of a tamper according to the present invention.
  • FIGURES 2, 3, and 4 show the operation of the tamper of FIGURE 1.
  • FIGURES 5, 6, and 7 are sectional elevations of another modified embodiment of a tamper according to the present invention the same being shown in three different operative positions.
  • FIGURE 8 is a sectional elevation of yet another 1 modified embodiment-of a tamper according to the present invention.
  • FIGURE 9 is a plan view of yet another modified embodiment of a tamper according to the present invention.
  • the casing contains a central carrier plate 2 which is resiliently supported within the casing by suitable compression springss 21.
  • the bottom of the housing 10 is convex with respect to the surface of the material being tamped. While the bottom of the casing 10 itself may contact the material and thus constitute the engaging portion, it is expedient to provide a separate element 100 which is removably mounted on the casing 10, preferably under stress, i.e., the element 100 may be a curved plate which is initially bent slightly out of its natural shape so that its natural resilience will help hold the plate on the casing.
  • the reason that it is desirable to provide a separate, exchangeable element is that the engaging portion is subject to wear so that the usefulness of the tamper as a whole can be prolonged simply by replacing a worn engaging portion by a new one.
  • the carrier plate 2 carries a drive unit 3 whose weight constitutes a load on the entire plate means of the tamper.
  • This drive unit 3 may be in the form of an internal combustion engine, or an electric motor, or a motor-generator set.
  • the drive unit has two power take-offs each of which is connectible to the drive shaft of the unit by means of a respective clutch mechanism which is of conventional construction.
  • FIGURE 1 shows one such take-off and clutch assembly at 30.
  • Each take-off is connected with respective vibrators 4, 40, constituted by rotary unbalance weights arranged on opposite sides of a transverse vertical plane x passing through the center of gravity of the plate means as a whole and mounted for rotation about a transverse axis in suitable bearings 5, 50, carried by mounting members 6, 60.
  • each take-off and its respective vibrator may be a conventional chain or belt drive 4a, 40a, tensioned by spring-biased tension rollers 4b, 40b.
  • each of the vibrators when coupled to the drive unit 3, will be rotated in the same direction, namely, counter-clockwise as viewed in FIGURE 1.
  • the now-front vibrator 40 is coupled to the drive unit 3.
  • the tamper will then move leftwardly, and, in the course of this movement, carry out pendular or rocking movements of small amplitude, i.e., the tamper will make small leftward jumps.
  • the vibrator 40 is disconnected from the unit 3 and the vibrator 4 is connected thereto. "To do this, it is not necessary to stop the drive unit, because there exist many types of couplings which allow this change-over to be carried out while the drive unit is running. Once this change-over has been effected, the unbalance vibrator 4 will rotate in the same direction as that in which the unbalance vibrator 40 previously rotated; the tamper will, however, now move rightwardly.
  • FIGURE 1 also shows a handle 20 passing through the closed housing formed by the casing 10 and cover 1 and attached to the carrier plate 2.
  • the handle 20 can be used to steer the tamper for sideways or curvilinear movements, and the free end of the handle 20 can carry the controls for the drive unit 3- and the clutches by which the vibrators are coupled to the unit.
  • FIGURE 3 shows a third pass over the material; the tamper will now ride quite high so that only a small area of the portion will contact the surface. This is symbolized by the two still larger arrows 900.
  • the sections 107, 108 may be parabolic.
  • the vibrator 4 straddles the transverse vertical plane passing through the center of gravity of the plate means 107, 10 8. From this position, the plate means, and with it the vibrator 4, may be tilted into two different positions in one of which, shown in FIGURE 6, the vibrator lies on one side of a transverse vertical plane y passing through the point a at which the section 108 contacts the surface of the material, and in the other of which positions, shown in FIGURE 7, the vibrator lies on the other side of the plane y that now passes through the point b.
  • the vibrator In order to make sure that an effective and stable overcenter shift occurs, the vibrator should be located at a relatively large distance from the apex of the plate means 107, 108. In this way, the tamper will maintain itself in the position which it occupies. If the curvature of the plate means is relatively small, however, the tamper may be kept in its position by means of the above-described handle 20.
  • FIGURE 8 shows an embodiment in which the armate plate means 110 supports the carrier plate 111 and carries a vibrator 4 which itself is mounted for pivotal movement between the two positions shown in solid and dashed lines, respectively, wherein the vibrator is located on opposite sides of the plane x.
  • the direction of travel of the tamper may be fixed by appropriately positioning the vibrator 4, it being again pointed out that the direction in which the vibrator rotates will 'not influence the direction of travel.
  • FIGURE 9 shows a larger tamper whose vibratory means comprise two pairs of vibrators 41, 410; 40, 401. Each pair is arranged, respectively, on opposite sides of the transverse vertical plane x passing through the center of gravity of the plate means, and the two'vibrators of each pair are arranged, respectively, atthe two lateral sides of the plate means;
  • all of the vibrators are adapted to be driven by a single drive unit 3 mounted on the carrier plate 2, it being possible, however, to provide a separate drive unit for each vibrator or a drive unit for the two coaxial vibrators on the same side of the plane x.
  • the coupling means which connect the individual vibrators to the drive unit 3 are so arranged as selectively to couple to the drive unit any two vibrators of the same pair, or any two vibrators located on the same lateral side of the plate means.
  • the vibrators 41, 410 are coupled to the drive unit, the tamper will move rightwardly, whereas if the vibrators 40, 401 are driven, the tamper will move leftwardly. If, however, it is desired to let the tamper move along a curvilinear path, then the two vibrators 40, 41 or the two vibrators 401, 410 will be coupled to the drive unit. If, during forward movement in a given direction, the tamper is to be turned, then one of the two leading vibrators can be uncoupled from the drive unit.
  • the rotary unbalance vibrator acts as a pendulum whose direction of rotation has no effect on the direction of propagation of the tamper.
  • the tamper according to the present invention operates very quietly and uniformly, and avoids abrupt and other undesirable oscillations. Furthermore, the tamper is easily controlled and manipulated, and, due to its housing-like construction, the various component parts are well protected against dirt and moisture.
  • a self-propelled tamping device comprising, in combination:
  • (a) plate means having a working surface which contacts the surface of the material to be tamped, said working surface being arched covexly and having a substantially uniform, generally cylindrical configuration, the axis of curvature of said working surface being transverse to the direction in which the tamping device is movable;
  • At least one rotary vibrator rigidly mounted on said plate means and incorporating but a single rotary unbalance mass for producing non-directional vibrations, said vibrator being located in the forward part' of the tamping device for causing the tamping device, when said single rotary unbalance mass is driven, to move in a pendular manner over the surface to be tamped, whereby the non-directional vibrations are utilized to impart directional movement to the tamping device.
  • a tamping device comprising,in combination:
  • (a) plate means having an engaging portion for contacting the surface of the material to be tamped, said engaging portion being of arcuate configuration and curved convexly with respect to the surface of the material such that the area of said engaging portion which actually touches the surface of the material is dependent on the density of the material being tamped;
  • a tamping device comprising, in combination:
  • (a) plate means having an engaging portion for contacting the surface of the material to be tamped, said engaging portion being of arcuate configuration and curved convexly with respect to the surface of the material such that the area of said engaging portion which actually touches the surface of the material is dependent on the density of the material being tamped;
  • said vibrator may be positioned to lie on either side of a vertical transverse plane passing through the point at which said engaging portion contacts the surface of the material.
  • a tamping device as defined in claim 3 wherein said engaging portion is symmetrical with respect to a transverse vertical plane passing through the center of gravity of said plate means and wherein said vibrator straddles said plane.
  • a tamping device comprising, in combination:
  • (a) plate means having an engaging portion for contacting the surface of the material to be tamped, said engaging portion being of arcuate configuration and curved convexly with respect to the surface of the material such that the area of said engaging portion which actually touches the surface of the material is dependent on the density of the material being tamped;
  • a self-propelled tamping device comprising, in combination: I
  • each respective vibrator incorporating but a single rotary unbalance mass for producing non-directional vibrations, whereby when of the tamping device, is driven, the tamping device will, under the influence of the non-directional vibrations produced by the rotary unbalance mass being driven, be caused to move in a pendular manner over the surface to be tamped and will also be propelled in the desired direction of travel.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Agronomy & Crop Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Road Paving Machines (AREA)
US553260A 1961-05-25 1966-05-26 Tamping device Expired - Lifetime US3342118A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEJ19978A DE1283757B (de) 1961-05-25 1961-05-25 Selbstbeweglicher Plattenruettler, insbesondere zur Verdichtung des Baugrundes od. dgl.

Publications (1)

Publication Number Publication Date
US3342118A true US3342118A (en) 1967-09-19

Family

ID=7200140

Family Applications (1)

Application Number Title Priority Date Filing Date
US553260A Expired - Lifetime US3342118A (en) 1961-05-25 1966-05-26 Tamping device

Country Status (6)

Country Link
US (1) US3342118A (fr)
AT (2) AT239834B (fr)
BE (1) BE617593A (fr)
CH (1) CH393202A (fr)
DE (1) DE1283757B (fr)
GB (1) GB1012683A (fr)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3392641A (en) * 1966-06-17 1968-07-16 K & R Ind Inc Concrete spreading machines
US3515042A (en) * 1968-10-14 1970-06-02 Harold J Austin Concrete vibrating and finishing machine
US3703127A (en) * 1970-01-17 1972-11-21 Benno Kaltenegger Rigid base earth compactor
US3787135A (en) * 1972-04-07 1974-01-22 Layton Mfg Co Vehicle and vibrating compactor combination
US3878733A (en) * 1974-01-15 1975-04-22 Stone Construction Equipment Compactor with directional control for eccentric weights
US3899263A (en) * 1973-01-10 1975-08-12 Koehring Co Compactor
US4145156A (en) * 1976-08-24 1979-03-20 Dynapac Maskin Ab Plate vibrator
WO1985001972A1 (fr) * 1983-10-25 1985-05-09 Ballast-Nedam Groep N.V. Procede et dispositif de compactage du sol
USRE35073E (en) * 1989-01-18 1995-10-31 Gary N. Martin Apparatus and method for removing oil spots from a surface
DE29920177U1 (de) 1999-11-17 2000-01-05 BOMAG GmbH & Co. oHG, 56154 Boppard Plattenrüttler
US20060283052A1 (en) * 2005-02-11 2006-12-21 Klaus Kremer Snow surface compactor and track apparatus
US20080298893A1 (en) * 2005-12-07 2008-12-04 Wacker Construction Equipment Ag Vibration Plate with Stabilizing Device
CN102561303A (zh) * 2010-09-23 2012-07-11 宝马格有限公司 用于夯实底土的振动夯机
US9765534B1 (en) * 2016-11-14 2017-09-19 Albert DiLuzio Concrete work tool, method of making, and applications

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2042156A (en) * 1933-12-29 1936-05-26 Blaw Knox Co Tamper for concrete road finishing machines
US2223024A (en) * 1936-09-14 1940-11-26 Losenhausenwerk Duesseldorfer Tamping machine

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE500329A (fr) *
FR732362A (fr) * 1932-02-26 1932-09-19 Vibrateur pour béton
AT144101B (de) * 1935-01-28 1935-12-27 Paul Schlesinger Flächenrüttler mit Eigenkraftvorschub.
US2194410A (en) * 1936-10-01 1940-03-19 Vibro Betong Ab Vibrating device
US2771012A (en) * 1953-04-06 1956-11-20 Jackson Vibrators Compactor for asphaltic and other compactable materials
DE930677C (de) * 1953-06-30 1955-09-22 Bohn & Kaehler Selbstbewegliches Verdichtungsgeraet mit einem auf einer Grundplatte angebrachten Ruettelgetriebe, insbesondere zum Verdichten von geschuettetem oder gewachsenem Boden
DE1102658B (de) * 1953-12-12 1961-03-16 Losenhausenwerk Duesseldorfer Selbstbeweglicher Schwingungsverdichter
DE1760887U (de) * 1954-08-07 1958-01-30 Losenhausenwerk Duesseldorfer Bodenverdichter.
US2856828A (en) * 1955-01-24 1958-10-21 Leukart Machine Co Inc J Impacting machine
DE1792590U (de) * 1959-02-19 1959-07-23 Abg Werke Ges Mit Beschraenkte Ruettelplatte zur bodenverdichtung.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2042156A (en) * 1933-12-29 1936-05-26 Blaw Knox Co Tamper for concrete road finishing machines
US2223024A (en) * 1936-09-14 1940-11-26 Losenhausenwerk Duesseldorfer Tamping machine

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3392641A (en) * 1966-06-17 1968-07-16 K & R Ind Inc Concrete spreading machines
US3515042A (en) * 1968-10-14 1970-06-02 Harold J Austin Concrete vibrating and finishing machine
US3703127A (en) * 1970-01-17 1972-11-21 Benno Kaltenegger Rigid base earth compactor
US3787135A (en) * 1972-04-07 1974-01-22 Layton Mfg Co Vehicle and vibrating compactor combination
US3899263A (en) * 1973-01-10 1975-08-12 Koehring Co Compactor
US3878733A (en) * 1974-01-15 1975-04-22 Stone Construction Equipment Compactor with directional control for eccentric weights
US4145156A (en) * 1976-08-24 1979-03-20 Dynapac Maskin Ab Plate vibrator
EP0142198A1 (fr) * 1983-10-25 1985-05-22 Ballast-Nedam Groep N.V. Méthode et dispositif pour le compactage du sol
WO1985001972A1 (fr) * 1983-10-25 1985-05-09 Ballast-Nedam Groep N.V. Procede et dispositif de compactage du sol
USRE35073E (en) * 1989-01-18 1995-10-31 Gary N. Martin Apparatus and method for removing oil spots from a surface
DE29920177U1 (de) 1999-11-17 2000-01-05 BOMAG GmbH & Co. oHG, 56154 Boppard Plattenrüttler
US20060283052A1 (en) * 2005-02-11 2006-12-21 Klaus Kremer Snow surface compactor and track apparatus
US20080298893A1 (en) * 2005-12-07 2008-12-04 Wacker Construction Equipment Ag Vibration Plate with Stabilizing Device
CN102561303A (zh) * 2010-09-23 2012-07-11 宝马格有限公司 用于夯实底土的振动夯机
CN102561303B (zh) * 2010-09-23 2015-11-25 宝马格有限公司 用于夯实底土的振动夯机
US9765534B1 (en) * 2016-11-14 2017-09-19 Albert DiLuzio Concrete work tool, method of making, and applications

Also Published As

Publication number Publication date
BE617593A (fr) 1962-08-31
CH393202A (de) 1965-05-31
DE1283757B (de) 1968-11-21
GB1012683A (en) 1965-12-08
AT240899B (de) 1965-06-25
AT239834B (de) 1965-04-26

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