CA1166123A - Control for plate vibrators - Google Patents
Control for plate vibratorsInfo
- Publication number
- CA1166123A CA1166123A CA000371982A CA371982A CA1166123A CA 1166123 A CA1166123 A CA 1166123A CA 000371982 A CA000371982 A CA 000371982A CA 371982 A CA371982 A CA 371982A CA 1166123 A CA1166123 A CA 1166123A
- Authority
- CA
- Canada
- Prior art keywords
- hub
- control
- shaft
- wire
- vibrating element
- 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
Links
- 239000000463 material Substances 0.000 claims abstract description 3
- 239000004576 sand Substances 0.000 claims abstract description 3
- 230000001105 regulatory effect Effects 0.000 claims abstract 2
- 230000033001 locomotion Effects 0.000 claims description 7
- 238000005056 compaction Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000010426 asphalt Substances 0.000 description 1
- 230000007775 late Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 101150103975 sui1 gene Proteins 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/22—Machines, 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
- E01C19/30—Tamping or vibrating apparatus other than rollers ; Devices for ramming individual paving elements
- E01C19/34—Power-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
- E01C19/38—Power-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
-
- 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
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
- G05G7/00—Manually-actuated control mechanisms provided with one single controlling member co-operating with one single controlled member; Details thereof
- G05G7/02—Manually-actuated control mechanisms provided with one single controlling member co-operating with one single controlled member; Details thereof characterised by special provisions for conveying or converting motion, or for acting at a distance
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Civil Engineering (AREA)
- Paleontology (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- Architecture (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Agronomy & Crop Science (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Road Paving Machines (AREA)
- Braking Arrangements (AREA)
Abstract
ABSTRACT
The present invention refers to a control for regulating the direction of the vibrational force in plate vibrators for compacting gravel, sand and similar materials and which are equipped with a vibrating element consisting of two or more contra-rotating eccentric weights.
Particularly characteristic of the control is that it acts on the adjusting mechanism of the vibrating element by means of a wire and that its control can be held in the set posi-tion by means of a spiral spring interacting with a friction brake.
The present invention refers to a control for regulating the direction of the vibrational force in plate vibrators for compacting gravel, sand and similar materials and which are equipped with a vibrating element consisting of two or more contra-rotating eccentric weights.
Particularly characteristic of the control is that it acts on the adjusting mechanism of the vibrating element by means of a wire and that its control can be held in the set posi-tion by means of a spiral spring interacting with a friction brake.
Description
-~N~ C ~ KIN i~ T~l~
~rhe pu~-pose of ~he prescnt invention is -to ~chieve a c(>n~:~ol for p]a1e v;bralors by mc~ans of which t:he direction of t:he vil-rational folce (3enerated by the vibrating element of the plate vibrator can be steplessly varied and set in the desired position.
-~- On plate vibrators desic~ned for t:he compaction of soil, asphalt and similar materia]s and wh;ch are equipped with vibrating e]ements consisting of two or more contra-rotating eecentrie weights, a known method of changing the direction of the vibrational foree is by ehanging the phase position of the rotating eccentrie weights in relation to eaeh other for the purpose of causing the plate vibrator to move in a forward or reverse direction.
Plate vibrators of the type in question are used for compacting sand,~ gravel and similar materials and are often used as auxiliary units to supplement larger compaction machines on roadworks ete. By virtue of their ability to move forward and in reverse, sueh ~lates are suitable for eompaction work -~ in pipe trenches and similar confined spaees where the scope for manoeuvring a plate whieh is capable of moving in only one direction is limited. It is important that reversal of 8 the direetion of movement of the plate ean be aehieved partly in a simple and practical manner as far as the operator is coneerned and partly so that the desired speed eontrol position for moving forward and in reverse respeetively ean be set and L~aintained without ineonvenienee to the operator. The purpose . ~
~, 11~ 23 of the invention is to achieve a control for changing the direction of the vibrational force, whereby resetting the vibrating element by means of the control is achieved by means of a wire arranged between the control and the adjusting mechanism of the element.
The control in accordance with the invention is particularly suitable for vibrating elements of the type described in Swedish patent No. 410,800, for example. This type of vibrating element consists of at least two contra-rotating eccentric weights connected to each other via gears for the purpose of resetting the phase position of the eccentric weights in relation to each other while in operation, whereby one of the eccentric weights is arranged to pivot in relation to the rotational shaft of the vibrating element and driving of the adjustable eccentric is accomplished from the rotational shaft via a gear transmission which embraces an adjusting mechanism equipped with a pulley which is arranged to be rotated by means of a wire wound round the pulley for resetting the adjusting mechanism imparting a rotating movement to it.
The vibrating element is so designed that while in operation it automatically adjusts itself so that the vibrational force generated by the element imparts to the plate vibrator a maximum translation speed in the forward direction.
The control consists of a hub around which the resetting wire is wound and secured. Fixed to the hub is a control lever by means of which the hub can be rotated. By moving the lever in one or the other direction the wire can be wound round the hub and unwound from it respectively.
!~,,. 3 lZ3 ~ulling on the wire rcsults ;n a rotation of the adjusting mecllanism and cons~ucntly a ch.ln~e in the Lranslalion s~ d of the p]~';,e. If the lever is released the acljusting mechanism automatically returns to the posltion at which maximum translation movement in a forward direction is obtained.
The pulling force exerted by the element on the wire às long as it is in operation is comparatively large. However, this can be overcome without much difficulty by means of the control lever. In order to causè the plate to`move in reverse or in a forward direction at a slower speed than maximum the driver must, however, continuously hold the lever in the desired speed position which may'be tiring at length. To counteract the pulling force of the element on the wire a spiral spring is mounted in accordance with the invention on the hub of the control so that it exerts a turning force on the hub acting in the opposite direction to the moment of the pulling force of the vibrating element on the wire. The spiral spring is thereby so tensioned that the force generated by the spring eliminates that caused by the element.
, Owing to the continuous vibration to which control and spring are exposed, and also on account of differences between the properties of the springs, the control lever may under certain circumstanccs move out of its set speed position.
A friction brake is therefore arranged on the hub, the purpose of which is to hold it in place on application and thereby the speed position set on the control.
.
~ 4 lZ3 The combination of tellsioned spring and brake with adjustable al~plication in accordallce with the invention permits arbitrary re~ulation of -the control function.
If t:he spiral spring is tensioned to exert a force in the hub which does not entirely c:ounteract the force caused by the vibrating clement, the operator must continuously hold the control lever in the dcsired speed position so that it cloes not return to the position at which maximum forward speed is obtained. However, the force in the lever is not so great that it causes major inconvenience to the driver for shorter periods. On the other hand, the advantage gained is that if the operator when driving in reverse, for example, trips and is consequently forced to release the lever, the plate automatically goes into the forward direction mode.
This may be particu]arly advantageous when compacting in pipe trenches and other confined spaces.
Under other compaction conditions it may be an advantage if the operator can release the control lever without the speed of the plate changing to maximum forward motion. Under these conditions the brake interacting with the control-hub can be set to retain the lever in the desired speed position.
Application of the brake is then selected so that the lever can be moved to the desired speed setting without the operator having to use much force but so that braking power is sufficiently high to keep the lever in the set position.
The invention will be described in greater detail in the following with reference to the appended drawings where Fig. 1 shows a version of the control viewed from the side, Fig. 2 La cross-section through the line A-A in Fig. 1 and Fig. 3 a cross-section through the line B-B in Fig. 2. Fig. 4, finally, ~S~~
~hows a sui1:able vibrat;n~ elemellt on which the control accordin~ to the ;nvell~ion is PraCtically applic~}~le.
The control consists of a hub 1 whicll is arranged to pivot on a shaft 2 mounted on the control hand]e of the plate vibrator.
The hub is caused to rota~e about its axis by mcans of a control halldle 3 fixed to the hub. Wound round the hub is a wire 4, one end of which is connected to and wound round tnot shown) a pulley 5, Fig. 4, incorporated in the adjusting mechanism of the eccentric element. The other end of the wire is secured to hub 1 by means of a retaining screw 6.
During operation the eccentric element exerts a constant pulling orce on wire 4 and thereby gives rise to a turning force on hub 1. To counteract ~his the hub is fitted with a spiral spring 7, one end 8 of which is secured to a disc 9 which comprises an integral part of hub 1. The other end 10 of spring 7 is secured to the rotational shaft 2 of hub 1.
The spring 7 is so tensioned that the turning force thus exerted on hub`1 partially eliminates the force caused by the ec¢entric element.
Owing to the vibration in the plate vibrator and also on account of differences in the characteristics of the sprin~s, - hub 1 is equipped with a friction brake. This consists of cup springs 11 which are mounted in pairs on shaft 2 at each end of hub 1. The cup springs are tensionedby means 8 of a nut 12 screwed onto shaft 2, the nut bein~ held in position by a locknut 13. By screwing in nut 12 the cup springs 11 are tensioned between it and the end of the hub and between the other end of the hub and a shoulder 14 on Lshaft 2. The desired application of the friction brake is obtained in this manner.
_ S
~haft 2 is secured to a bracket 15 on the con~rol handle of the plate vibrator by means of a screw connection 16.
It is so mounted that when scrcw 16 is slackened, shaft 2 can be rotated in relation to hub 1, whereby spring 7 can be tensioned ~y the desired amount.-TI1e control is built into -~ a casing ~ secured to the control handle of the plate - vibrator. Arranged inside it is a stop 18 for two studs 19 and 20 arranged on hub disc 9. In the reverse-direction position of the control stud 19 rests against stop 18 and in the forward direction position stud 20 rests against it.
The outer end of wire 4 is secured to and wound round pulley 5 of the eccentric element. ~y moving control lever 3 from the position at which hub stud 19 res~s against stop 18 until stud 20 is broughtto rest against this stop the setting of the eccéntric element shown in Fig. 4 is changed from generating a vibrational force which imparts to the plate vibrator a translation movement in the reverse direction to a translation movement in the forward direction.
The eccentric element shown in Fig. 4 consists of a housing 101 in which rotatable-shaft 102- is journalled and on-which shaf~t an eccentric weight ~ is secured. The shaft is journalled in bea~ings 104 and 105 and is caused to rotate by means of pulley 106 which is shaped as an eccentric weight and secured to one end of the shaft. On shaft 102 an eccentric weight 107 is journalled so as to rotate in 8 bearing 108 and by means of a gear transmission interacting with shaft 102 the weight is caused to rotate in the opposite direction to and with the same rotational speed as eccentric weights 103 and 106.
~rhe pu~-pose of ~he prescnt invention is -to ~chieve a c(>n~:~ol for p]a1e v;bralors by mc~ans of which t:he direction of t:he vil-rational folce (3enerated by the vibrating element of the plate vibrator can be steplessly varied and set in the desired position.
-~- On plate vibrators desic~ned for t:he compaction of soil, asphalt and similar materia]s and wh;ch are equipped with vibrating e]ements consisting of two or more contra-rotating eecentrie weights, a known method of changing the direction of the vibrational foree is by ehanging the phase position of the rotating eccentrie weights in relation to eaeh other for the purpose of causing the plate vibrator to move in a forward or reverse direction.
Plate vibrators of the type in question are used for compacting sand,~ gravel and similar materials and are often used as auxiliary units to supplement larger compaction machines on roadworks ete. By virtue of their ability to move forward and in reverse, sueh ~lates are suitable for eompaction work -~ in pipe trenches and similar confined spaees where the scope for manoeuvring a plate whieh is capable of moving in only one direction is limited. It is important that reversal of 8 the direetion of movement of the plate ean be aehieved partly in a simple and practical manner as far as the operator is coneerned and partly so that the desired speed eontrol position for moving forward and in reverse respeetively ean be set and L~aintained without ineonvenienee to the operator. The purpose . ~
~, 11~ 23 of the invention is to achieve a control for changing the direction of the vibrational force, whereby resetting the vibrating element by means of the control is achieved by means of a wire arranged between the control and the adjusting mechanism of the element.
The control in accordance with the invention is particularly suitable for vibrating elements of the type described in Swedish patent No. 410,800, for example. This type of vibrating element consists of at least two contra-rotating eccentric weights connected to each other via gears for the purpose of resetting the phase position of the eccentric weights in relation to each other while in operation, whereby one of the eccentric weights is arranged to pivot in relation to the rotational shaft of the vibrating element and driving of the adjustable eccentric is accomplished from the rotational shaft via a gear transmission which embraces an adjusting mechanism equipped with a pulley which is arranged to be rotated by means of a wire wound round the pulley for resetting the adjusting mechanism imparting a rotating movement to it.
The vibrating element is so designed that while in operation it automatically adjusts itself so that the vibrational force generated by the element imparts to the plate vibrator a maximum translation speed in the forward direction.
The control consists of a hub around which the resetting wire is wound and secured. Fixed to the hub is a control lever by means of which the hub can be rotated. By moving the lever in one or the other direction the wire can be wound round the hub and unwound from it respectively.
!~,,. 3 lZ3 ~ulling on the wire rcsults ;n a rotation of the adjusting mecllanism and cons~ucntly a ch.ln~e in the Lranslalion s~ d of the p]~';,e. If the lever is released the acljusting mechanism automatically returns to the posltion at which maximum translation movement in a forward direction is obtained.
The pulling force exerted by the element on the wire às long as it is in operation is comparatively large. However, this can be overcome without much difficulty by means of the control lever. In order to causè the plate to`move in reverse or in a forward direction at a slower speed than maximum the driver must, however, continuously hold the lever in the desired speed position which may'be tiring at length. To counteract the pulling force of the element on the wire a spiral spring is mounted in accordance with the invention on the hub of the control so that it exerts a turning force on the hub acting in the opposite direction to the moment of the pulling force of the vibrating element on the wire. The spiral spring is thereby so tensioned that the force generated by the spring eliminates that caused by the element.
, Owing to the continuous vibration to which control and spring are exposed, and also on account of differences between the properties of the springs, the control lever may under certain circumstanccs move out of its set speed position.
A friction brake is therefore arranged on the hub, the purpose of which is to hold it in place on application and thereby the speed position set on the control.
.
~ 4 lZ3 The combination of tellsioned spring and brake with adjustable al~plication in accordallce with the invention permits arbitrary re~ulation of -the control function.
If t:he spiral spring is tensioned to exert a force in the hub which does not entirely c:ounteract the force caused by the vibrating clement, the operator must continuously hold the control lever in the dcsired speed position so that it cloes not return to the position at which maximum forward speed is obtained. However, the force in the lever is not so great that it causes major inconvenience to the driver for shorter periods. On the other hand, the advantage gained is that if the operator when driving in reverse, for example, trips and is consequently forced to release the lever, the plate automatically goes into the forward direction mode.
This may be particu]arly advantageous when compacting in pipe trenches and other confined spaces.
Under other compaction conditions it may be an advantage if the operator can release the control lever without the speed of the plate changing to maximum forward motion. Under these conditions the brake interacting with the control-hub can be set to retain the lever in the desired speed position.
Application of the brake is then selected so that the lever can be moved to the desired speed setting without the operator having to use much force but so that braking power is sufficiently high to keep the lever in the set position.
The invention will be described in greater detail in the following with reference to the appended drawings where Fig. 1 shows a version of the control viewed from the side, Fig. 2 La cross-section through the line A-A in Fig. 1 and Fig. 3 a cross-section through the line B-B in Fig. 2. Fig. 4, finally, ~S~~
~hows a sui1:able vibrat;n~ elemellt on which the control accordin~ to the ;nvell~ion is PraCtically applic~}~le.
The control consists of a hub 1 whicll is arranged to pivot on a shaft 2 mounted on the control hand]e of the plate vibrator.
The hub is caused to rota~e about its axis by mcans of a control halldle 3 fixed to the hub. Wound round the hub is a wire 4, one end of which is connected to and wound round tnot shown) a pulley 5, Fig. 4, incorporated in the adjusting mechanism of the eccentric element. The other end of the wire is secured to hub 1 by means of a retaining screw 6.
During operation the eccentric element exerts a constant pulling orce on wire 4 and thereby gives rise to a turning force on hub 1. To counteract ~his the hub is fitted with a spiral spring 7, one end 8 of which is secured to a disc 9 which comprises an integral part of hub 1. The other end 10 of spring 7 is secured to the rotational shaft 2 of hub 1.
The spring 7 is so tensioned that the turning force thus exerted on hub`1 partially eliminates the force caused by the ec¢entric element.
Owing to the vibration in the plate vibrator and also on account of differences in the characteristics of the sprin~s, - hub 1 is equipped with a friction brake. This consists of cup springs 11 which are mounted in pairs on shaft 2 at each end of hub 1. The cup springs are tensionedby means 8 of a nut 12 screwed onto shaft 2, the nut bein~ held in position by a locknut 13. By screwing in nut 12 the cup springs 11 are tensioned between it and the end of the hub and between the other end of the hub and a shoulder 14 on Lshaft 2. The desired application of the friction brake is obtained in this manner.
_ S
~haft 2 is secured to a bracket 15 on the con~rol handle of the plate vibrator by means of a screw connection 16.
It is so mounted that when scrcw 16 is slackened, shaft 2 can be rotated in relation to hub 1, whereby spring 7 can be tensioned ~y the desired amount.-TI1e control is built into -~ a casing ~ secured to the control handle of the plate - vibrator. Arranged inside it is a stop 18 for two studs 19 and 20 arranged on hub disc 9. In the reverse-direction position of the control stud 19 rests against stop 18 and in the forward direction position stud 20 rests against it.
The outer end of wire 4 is secured to and wound round pulley 5 of the eccentric element. ~y moving control lever 3 from the position at which hub stud 19 res~s against stop 18 until stud 20 is broughtto rest against this stop the setting of the eccéntric element shown in Fig. 4 is changed from generating a vibrational force which imparts to the plate vibrator a translation movement in the reverse direction to a translation movement in the forward direction.
The eccentric element shown in Fig. 4 consists of a housing 101 in which rotatable-shaft 102- is journalled and on-which shaf~t an eccentric weight ~ is secured. The shaft is journalled in bea~ings 104 and 105 and is caused to rotate by means of pulley 106 which is shaped as an eccentric weight and secured to one end of the shaft. On shaft 102 an eccentric weight 107 is journalled so as to rotate in 8 bearing 108 and by means of a gear transmission interacting with shaft 102 the weight is caused to rotate in the opposite direction to and with the same rotational speed as eccentric weights 103 and 106.
Claims
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A control for regulating the direction of the vibrational force in plate vibrators for compacting gravel, sand and similar materials, such plates being equipped with the type of vibrating element that consists of two or more contra-rotating eccentric weights and an adjusting mechanism interacting with them via gears, the adjusting mechanism being arranged to be given an adjusting movement, which affects the direction of the vibrational force by means of a wire connected to the mechanism, one end of the wire being secured to and partially wound round a pulley connected to the adjusting mechanism of the vibrating element and the other end of the wire being secured to and partially wound round a hub, characterized in that the hub is pivotally journalled on a shaft and rigidly connected with a control handle of the plate vibrator, and that a spiral spring, one end of which is secured to the hub and the other end of the shaft, is tensioned so as to exert a turning force on the hub in order to eliminate the moment on the hub generated by the vibrating element during rotation, and that a friction brake consisting of cup springs are mounted on the shaft and tensioned against the hub by means of a nut threaded on the shaft.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8001763-5 | 1980-03-06 | ||
| SE8001763A SE420112B (en) | 1980-03-06 | 1980-03-06 | VIBRATOR PLATOR MANOVERDON |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1166123A true CA1166123A (en) | 1984-04-24 |
Family
ID=20340433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000371982A Expired CA1166123A (en) | 1980-03-06 | 1981-02-27 | Control for plate vibrators |
Country Status (10)
| Country | Link |
|---|---|
| JP (1) | JPS57500251A (en) |
| BR (1) | BR8108737A (en) |
| CA (1) | CA1166123A (en) |
| DE (1) | DE3137614C2 (en) |
| FR (1) | FR2477598A1 (en) |
| GB (1) | GB2093571B (en) |
| MX (1) | MX153044A (en) |
| NL (1) | NL8101104A (en) |
| SE (1) | SE420112B (en) |
| WO (1) | WO1981002593A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5672027A (en) * | 1996-08-01 | 1997-09-30 | Wadensten; Theodore S. | Reversible plate compactor having an improved drive and directional control |
| CN111485721B (en) * | 2020-04-27 | 2021-12-03 | 徐州启峰智能科技有限公司 | Concrete vibrator appurtenance |
| EP4029991B1 (en) * | 2021-01-14 | 2023-05-10 | Joseph Vögele AG | Tamper stroke adjustment |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1100482A (en) * | 1912-10-28 | 1914-06-16 | Nicolas Herzmark | Power-transmitting device. |
| US1551823A (en) * | 1925-03-09 | 1925-09-01 | Amac Ltd | Control lever |
| US3448633A (en) * | 1966-12-30 | 1969-06-10 | Monarch Road Machinery Co | Flexible control mechanism for valves and the like |
| US3814533A (en) * | 1972-11-03 | 1974-06-04 | H Buck | Compactor for soil and the like with improved vibrator assembly |
| US3817646A (en) * | 1973-04-30 | 1974-06-18 | Wacker Corp | Vibration generator |
| US3915029A (en) * | 1974-09-09 | 1975-10-28 | Shimano Industrial Co | Operating lever for gear-shifting means of a bicycle |
| SE410800B (en) * | 1976-08-24 | 1979-11-05 | Dynapac Maskin Ab | VIBRATION PLATE FOR PACKING OF SOIL, ASPHALT AND SIMILAR MATERIALS |
-
1980
- 1980-03-06 SE SE8001763A patent/SE420112B/en not_active IP Right Cessation
-
1981
- 1981-01-27 WO PCT/SE1981/000020 patent/WO1981002593A1/en active Application Filing
- 1981-01-27 DE DE3137614T patent/DE3137614C2/en not_active Expired
- 1981-01-27 GB GB8207960A patent/GB2093571B/en not_active Expired
- 1981-01-27 BR BR8108737A patent/BR8108737A/en unknown
- 1981-01-27 JP JP56500625A patent/JPS57500251A/ja active Pending
- 1981-02-27 CA CA000371982A patent/CA1166123A/en not_active Expired
- 1981-03-03 FR FR8104180A patent/FR2477598A1/en active Granted
- 1981-03-05 MX MX186240A patent/MX153044A/en unknown
- 1981-03-06 NL NL8101104A patent/NL8101104A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| WO1981002593A1 (en) | 1981-09-17 |
| BR8108737A (en) | 1982-06-22 |
| SE8001763L (en) | 1981-09-07 |
| FR2477598A1 (en) | 1981-09-11 |
| DE3137614T1 (en) | 1982-09-09 |
| DE3137614C2 (en) | 1986-02-06 |
| GB2093571A (en) | 1982-09-02 |
| JPS57500251A (en) | 1982-02-12 |
| SE420112B (en) | 1981-09-14 |
| FR2477598B1 (en) | 1985-03-29 |
| GB2093571B (en) | 1983-04-20 |
| MX153044A (en) | 1986-07-10 |
| NL8101104A (en) | 1981-10-01 |
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