DK154030B - APPARATUS FOR DRIVING OBJECTS BY USING PRESSURE OR TENSION FORCE. FOR DAMAGE IN EARTH - Google Patents
APPARATUS FOR DRIVING OBJECTS BY USING PRESSURE OR TENSION FORCE. FOR DAMAGE IN EARTH Download PDFInfo
- Publication number
- DK154030B DK154030B DK534677AA DK534677A DK154030B DK 154030 B DK154030 B DK 154030B DK 534677A A DK534677A A DK 534677AA DK 534677 A DK534677 A DK 534677A DK 154030 B DK154030 B DK 154030B
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- DK
- Denmark
- Prior art keywords
- drive means
- drive
- movement
- driving
- transfer means
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D13/00—Accessories for placing or removing piles or bulkheads, e.g. noise attenuating chambers
- E02D13/10—Follow-blocks of pile-drivers or like devices
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
- Crushing And Grinding (AREA)
- Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)
- Dicing (AREA)
- Earth Drilling (AREA)
Description
iin
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Opfindelsen angår et apparat til drivnlng af genstande ved hjælp af tryk- eller trækkraft, f.eks. til nedramning i jorden, hvor et drivorgan er indrettet til skiftevis at aflaste og belaste genstanden og til under 5 i det mindste slutfasen af sin bevægelse at samvirke med et overføringsorgan for overføring af drivkraft til genstanden, og hvor overføringsorganet udgøres af en beholder, hvis mod drivorganet vendende side har en. til drivorganet passende åbning, via hvilken i det mindste et 10 parti af drivorganet kan trænge ind, og hvor der i beholderen findes en væske til dæmpning af drivorganets bevægelse, og drivorganets mod overføringsorganet vendende ende har i det mindste én i retning mod overføringsorganet åben udskæring.BACKGROUND OF THE INVENTION 1. Field of the Invention for grounding where a driving means is arranged to alternately relieve and load the object and to cooperate with at least the final phase of its movement with a transfer means for transferring power to the object, and the transfer means being a container whose counter the drive side facing side has one. an aperture suitable for the drive means through which at least one portion of the drive means can penetrate, and wherein there is contained in the container a fluid for damping the movement of the drive means, and the end of the drive means facing the transfer means has at least one opening towards the transfer means .
15 Det er almindeligt ved f.eks. nedramning af gen stande, såsom nedslåning af spunspæle, at anvende fald-hamre, vibrationshamre eller pneumatiske hamre, der slår direkte mod den genstand, som skal drives. De kendte apparater har imidlertid den ulempe, at de giver korte 20 slagtider og høje initialpåvirkninger i genstanden, hvilket dels er ineffektivt ud fra et drivningssynspunkt, og dels kan føre til skader på de genstande., som skal drives. Det kan f.eks. ske, at betonpæle "fjedrer tilbage" efter et slag og derved revner på et antal steder. End-25 videre kan en stor initialpåvirkning føre til deformationer og andre skader. En yderligere væsentlig ulempe ved de kendte apparater er, at de forårsager en betydelig støj.It is common for e.g. knocking down objects, such as knocking down pivots, using drop-hammers, vibration hammers or pneumatic hammers that strike directly against the object to be driven. However, the prior art has the disadvantage of providing short 20 stroke times and high initial effects on the object, which is partly ineffective from a driving point of view and partly can cause damage to the objects to be operated. It can for example. happen that concrete piles "spring back" after a blow, thereby cracking in a number of places. Furthermore, a large initial impact can lead to deformations and other damage. A further significant disadvantage of the known apparatus is that they cause considerable noise.
Der er udført forskellige forsøg på at skabe bedre 30 og mere effektive apparater. Pra DE-offentliggørelses-skrift nr. 2.358.655 kendes der således et apparat af den indledningsvis omhandlede opbygning. Ved dette apparat tilstræber man nok at opnå en dæmpning af drivorganets bevægelse, men det er ikke hensigten at bevirke en 35 fuldstændig opbremsning af drivorganet, inden det når overføringsorganets bund, idet der blot tilsigtes at opnå en reduktion af anslagshastigheden. Med henblik herpå v 2 DK 1540308 er væggen af det i apparatet indgående kammer udført meget kraftig for at kunne modstå dén påvirkning, som den udsættes for i overføringsorganet. Ved det kendte apparat er der ikke tale om at udnytte nogen form for gaspu-5 de for at bevirke en dæmpning af drivorganets bevægelse, idet udskæringen, der befinder sig i drivorganet, i stedet er bestemt til en eksplosionslignende indføring af trykluft, når drivorganet indtager sin bundstilling i overføringsorganet. Hensigten er herved dels at bibringe 10 overføringsorganet et første drivstød og dels at løfte drivorganet, så det atter kan falde ned og bibringe overføringsorganet et andet drivstød.Various attempts have been made to create better 30 and more efficient appliances. Thus, DE DE Publication No. 2,358,655 discloses an apparatus of the structure contemplated at the outset. In this apparatus, it is sought to obtain a dampening of the movement of the driving means, but it is not intended to effect a complete slowing of the driving means before reaching the bottom of the driving means, merely aiming to achieve a reduction of the impact velocity. To this end, the wall of the chamber included in the apparatus is designed very strongly to withstand the influence to which it is subjected in the transfer means. In the known apparatus, there is no use of any gas cushion to dampen the movement of the drive means, the cutout located in the drive means being instead intended for an explosion-like introduction of compressed air as the driving means takes up its bottom position in the transfer means. The purpose hereby is partly to impart a first thrust to the transfer means and partly to lift the drive means so that it can again fall down and impart a second thrust to the transfer means.
Fra SE-fremlæggelsesskrift nr. 388.647 er det endvidere kendt at anvende en stempel-cylinderanordning, 15 som arbejder med trykluft for at løfte stemplet og for at dæmpe dettes nedadgående bevægelse. Via trykluften belaster stemplet hele tiden genstanden. Løftning af stemplet kræver dog store mængder trykluft, hvilket bevirker, at der medgår megen energi til komprimering af 20 trykluft, en omstændighed, som er mindre fordelagtig ud fra et virkningsgradssynspunkt. Dertil kommer, at trykluften giver visse støjproblemer, og at der kræves en forholdsvis kompliceret reguleringsautomatik for at skabe ønskede trykimpulser.Further, from SE Publication No. 388,647, it is known to use a piston-cylinder device 15 which works with compressed air to lift the piston and to dampen its downward movement. Through the compressed air, the piston constantly loads the object. However, lifting the piston requires large amounts of compressed air, which causes a great deal of energy to compress 20 compressed air, a circumstance which is less advantageous from an efficiency point of view. In addition, the compressed air causes certain noise problems and a relatively complicated control automatic is required to generate desired pressure pulses.
25 Formålet med opfindelsen er at eliminere foran nævnte ulemper ved de kendte apparater og skabe et apparat, som er mere effektivt og lydløst end disse.The object of the invention is to eliminate the aforementioned disadvantages of the known apparatus and to create an apparatus which is more efficient and silent than these.
Til opnåelse heraf er apparatet ifølge opfindelsen .ejendommeligt ved, at udskæringen udgør et trykkammer, i 30 hvilket indtrængende væske danner et stempel til komprimering af en i udskæringen indespærret gaspude, fortrinsvis en luftpude.To achieve this, the apparatus according to the invention is characterized in that the cut-out forms a pressure chamber, in which liquid penetrates a piston for compressing a gas cushion, which is entrapped in the cut, preferably an air cushion.
Gennem samvirkningen mellem drivorganet og væsken i overføringsorganet opnås der en mere langvarig og mere 35 skånsom drivning end tidligere, samtidig med at slagstøj formindskes.The interaction between the driving means and the fluid in the transfer means results in a longer and more gentle driving than before, while at the same time reducing impact noise.
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3 , .3,.
En fordelagtig udførelsesforra for apparatet ifølge opfindelsen er ejendommelig ved, at der kun findes én udskæring, og at denne er beliggende centralt i drivorganets ende og har en dybde, som fortrinsvis er mindre 5 end diameteren af drivorganets ende. Drivorganet bør i det mindste i begyndelsen af sin bevægelse befinde sig helt oven for væskefladen. Et sådant apparat kan gøres yderst enkelt og pålideligt.An advantageous embodiment of the apparatus according to the invention is characterized in that there is only one cut-out and that it is located centrally at the end of the drive means and has a depth which is preferably less than the diameter of the end of the drive means. The drive means should be at least at the beginning of its movement completely above the liquid surface. Such an apparatus can be made extremely simple and reliable.
Opfindelsen forklares nærmere i det følgende under 10 henvisning til tegningen, hvor fig. 1 viser skematisk en udførelsesform for apparatet ifølge opfindelsen, fig. 2 i større skala en detalje ved apparatet i fig. 1, med delene i en anden indbyrdes stilling, og 15 fig. 3 en anden udførelsesform for apparatet iføl ge opfindelsen.The invention is explained in more detail below with reference to the drawing, in which fig. 1 shows schematically an embodiment of the apparatus according to the invention; FIG. 2 shows on a larger scale a detail of the apparatus of FIG. 1, with the parts in a different position, and FIG. 3 shows another embodiment of the apparatus according to the invention.
Det i fig. 1 viste apparat 1 anvendes til ned-drivning af en genstand, i det foreliggende tilfælde ned-drivning af en pæl 2 i jorden. I apparatet 1 indgår der 20 et drivorgan 3, der i denne udførelse har form af en faldhammer, som via en kraftoverføring 4 er forbundet med en kraftkilde 5, ved hvis hjælp drivorganet 3 kan løftes op til en ønsket faldhøjde og skiftevis aflaste og belaste pælen 2. Drivorganet 3 er styret af en 25 føring 6, der forneden er tilsluttet til et overføringsorgan 7, som hviler på pælen 2, og som er fikse-ret sideværts i forhold til pælen 2 ved hjælp af f,eks. en eller flere holdere 8.The FIG. 1 is used for driving down an object, in this case driving down a pile 2 into the ground. In the apparatus 1 there is included a driving means 3 which in this embodiment is in the form of a fall hammer, which is connected via a power transmission 4 to a power source 5, by means of which the driving means 3 can be raised to a desired drop height and alternately relieve and load the pile 2. The drive member 3 is guided by a guide 6, which is connected below to a transfer member 7, which rests on the pile 2 and which is fixed laterally to the pile 2 by means of e.g. one or more holders 8.
Drivorganet 3's nedre ende 9 er udformet til 30 under i hvert fald slutfasen af drivorganets nedadret-tede bevægelse at samvirke med overføringsorganet 7 ,for overføring af drivkraft til pælen 2. Overføringsorganet 7 udgøres af en beholder 10, hvis mod drivorganet 3 vendende side har en for drivorganets nedre 35 ende bestemt åbning 11, via hvilken i det mindste et parti af enden 9 kan trænge ind i behol-The lower end 9 of the drive means 3 is designed to cooperate, at least in the final phase of the downward movement of the drive means, with the transfer means 7, for transferring drive power to the pile 2. The transfer means 7 is constituted by a container 10 having a side facing the driving means 3. defined for the lower end of the drive means 11 through which at least a portion of the end 9 can penetrate into the container.
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4 deren 10, som Indeholder en væske 12 til at dæmpe drivorganets bevægelse. Enden 9 af drivorganet 3 og overføringsorganet 7 er indrettet til i samvirkning og under drivorganets opbremsningsbevægelse at bibeholde 5 et tilstrækkeligt stort væsketryk og en tilstrækkelig stor væskemængde i overføringsorganet 7 til i hovedsagen at standse drivorganet 3's bevægelse, inden det indtager sin bundstilling i beholderen 10.4, which contains a liquid 12 to dampen the movement of the drive means. The end 9 of the drive member 3 and the transfer member 7 are arranged to cooperatively and during the braking movement of the drive member 5 maintain a sufficiently large fluid pressure and a sufficient amount of fluid in the transfer member 7 to substantially stop the movement of the drive member 3 before taking up its bottom position in the container 10.
Den mod overføringsorganet 7 vendende side af X0 enden 9 har hensigtsmæssigt mindst én i retning nedad åben udskæring 13. Som vist i fig. 1 befinder drivorganet 3 sig i det mindste i begyndelsen af sin bevægelse helt oven for væskefladen 14'. Enden 9 har hensigtsmæssigt en diameter, som blot er ubetydeligt 15 mindre end diameteren af åbningen 11, og drivorganet 3 er derved forskydeligt med et vist spillerum i overføringsorganet 7.Conveniently, the side 9 of the X0 end 9 facing the transfer member 7 has at least one downwardly open cutout 13, as shown in FIG. 1, the driver 3 is at least at the beginning of its movement completely above the liquid surface 14 '. Conveniently, the end 9 has a diameter which is only negligible 15 smaller than the diameter of the opening 11, and the drive member 3 is thereby displaceable with some clearance in the transfer member 7.
Ved en drivbevægelse bringes drivorganet 3 til at bevæge sig mod genstanden. Ved den her anvendte fald-20 hammer sker dette ved, at drivorganet slippes fra en passende faldhøjde. Det er herved vigtigt, at føringen 6, drivorganet 3 og overføringsorganet 7 er udformet således i forhold til hinanden, at drivorganet 3 i de tilfælde, hvor det fra begyndelsen befinder sig helt 25 uden for overføringsorganet 7, kan træde smidigt ind i beholderen 10. Til dette formål kan man f.eks. forsyne beholderen 10 foroven med en affasning 14, og man kan desuden forsyne enden 9 forneden med en tilsvarende affasning 15.In a driving motion, the driving means 3 causes the object to move. In the case of the drop 20 hammer used here, this is done by releasing the drive means from an appropriate drop height. It is important hereby that the guide 6, the drive means 3 and the transfer member 7 are designed in relation to each other so that, in the case where it is initially completely outside the transfer member 7, the drive means 3 can enter smoothly into the container 10. For this purpose, e.g. provide the container 10 at the top with a bevel 14, and the end 9 can also be provided at the bottom with a corresponding bevel 15.
30 Når enden 9 kommer i kontakt med væskefladen 14' og derefter bevæger sig nedad i væsken 12, trænger der gradvis væske ind i udskæringen 13, fig. 2. Da den rundtgående spalte 16 mellem enden 9 og beholderen 10 hensigtsmæssigt er snæver, vil der kun kunne stige en begrænset mængde væske op i spalten. Den herved opnåede væsketætning opretholder en gaspude 17, normaltAs the end 9 comes into contact with the liquid surface 14 'and then moves downwardly in the liquid 12, liquid gradually enters the cutout 13, fig. 2. Since the circumferential gap 16 between the end 9 and the container 10 is suitably narrow, only a limited amount of liquid can rise in the gap. The resulting fluid seal maintains a gas pad 17, normally
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5 luft, i udskæringen 13. Enden 9's nedre kant 18 bortpresser væske, som i hovedsagen tvinges ind i udskæringen 13 og dér sammen med den øvrige væske komprimerer gaspuden 17. Herved opnås der en gradvis opbrems-5 ning af drivorganet 3, som hensigtsmæssigt hovedsagelig standses i sin bevægelse, inden det indtager sin bundstilling i beholderen 10.5, in the cutout 13. The lower edge 18 of the end 9 compresses liquid which is substantially forced into the cutout 13 and therein, together with the other liquid, compresses the gas pad 17. This results in a gradual braking of the driving member 3, which is suitably mainly is stopped in its motion before it takes up its bottom position in the container 10.
Udførte prøver har vist, at en faldhammer med en vægt på ca. 4000 kg og en faldhøjde på ca. 0,5 m kan op-10 bremses effektivt uden at nå sin bundstilling, hvis enden 9 har en udvendig diameter på ca. 400 mm, og beholderen 10 har en indvendig diameter på ca. 402 mm. Udskæringen 13 har derved en diameter på ca. 300 mm og en dybde på ca. 200 mm. Som væske anvendes der vand 15 med en dybde på ca. 250 mm. Foruden et betydeligt mere langvarigt slag end normalt, ca. 50 ms mod normalt ca.Tests performed have shown that a fall hammer weighing approx. 4000 kg and a fall height of approx. 0.5 m can be effectively braked without reaching its bottom position if the end 9 has an outside diameter of approx. 400 mm, and the container 10 has an internal diameter of approx. 402 mm. The cutout 13 thus has a diameter of approx. 300 mm and a depth of approx. 200 mm. As liquid, water 15 with a depth of approx. 250 mm. In addition to a much longer lasting blow than usual, approx. 50 ms versus normally approx.
10 ms, opnås der også et meget lavt lydniveau.10 ms, a very low sound level is also achieved.
For at vanskeliggøre væskestrømning i spalten 16 kan den nedre ende 9 og/eller beholderen 10 være 20 forsynet med et eller flere rundtgående spor 19 eller lignende organer, fig. 2.To impede fluid flow in the slot 16, the lower end 9 and / or container 10 may be provided with one or more circumferential grooves 19 or similar means. 2nd
Det kan også være ønskeligt ved hjælp af væske-strømningsregulerende organer at tillade en efter drivorganet 3's bevægelse afpasset væskestrømning ud fra 25 beholderen 10, f.eks. hvis blot en lille del af enden 9's endeflade er forsynet med en udskæring 13. Udskæringen 13 kan eventuelt helt udelades. En mulighed er her at dimensionere spalten 16 på en sådan måde, at der opnås en ønsket dæmpningseffekt. En anden mulighed 30 er at forsyne beholderen 10 eller drivorganet 3 med et nødvendigt antal passende udformede og hensigtsmæssigt anbragte udstrømningskanaler, som efter behov kan være forsynet med drøvlinger. Et eksempel på en sådan kanal 20 er antydet med stiplede linier i fig. 2, hvor 35 kanalen er udformet således, at bortpresset væske kan strømme tilbage til beholderen.It may also be desirable by means of liquid flow regulating means to allow a fluid flow adapted to the movement of the driving means 3 from the container 10, e.g. if only a small portion of the end surface of the end 9 is provided with a cut-out 13. The cut-out 13 may be omitted entirely. One possibility here is to size the slot 16 in such a way that a desired damping effect is obtained. Another option 30 is to provide the container 10 or drive means 3 with a necessary number of suitably formed and suitably arranged outflow channels which may be provided with droplets as required. An example of such a channel 20 is indicated by dotted lines in FIG. 2, wherein the conduit is designed such that extruded liquid can flow back to the container.
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Der kan eventuelt være behov for efter en eller flere drivbevægelser at erstatte tabt væske. Dette kan f.eks. ske ved hjælp af et væskepåfyldningsorgan, såsom et væskepåfyldningsrør 21, som kan indmunde på et pas-5 sende sted. Det kan eventuelt være nødvendigt at træffe forantstaltninger til køling af væsken i beholderen, hvilket kan ske ved at lade væsken cirkulere i et kølesystem og/eller ved at køle beholderen 10.It may be necessary to replace lost fluid after one or more drive movements. This can be done, for example. may be effected by means of a liquid filling means, such as a liquid filling tube 21, which may open at a convenient location. It may be necessary to take measures to cool the liquid in the container, which may be by circulating the liquid in a cooling system and / or by cooling the container 10.
Den i fig. 1 og 2 viste udførelsesform kan givet-10 vis varieres i mange forskellige henseender alt efter behov og ønskemål. Som vist i fig. 3 kan beholderen 10 f.eks. være forlænget opad, så den samtidig danner føring for drivorganet 3. Formen behøver ikke at være cylindrisk, idet der også kan anvendes andre hensigts-15 mæssige former. Væsken kan hensigtsmæssigt være vand, men også andre væsker eller væskeblandinger, såsom en blanding af glykol og vand, kan komme på tale.The FIG. 1 and 2, of course, can be varied in many different respects according to needs and desires. As shown in FIG. 3, the container 10 can e.g. be extended upwardly so that it simultaneously guides the driving member 3. The shape need not be cylindrical, as other suitable shapes can also be used. The liquid may conveniently be water, but also other liquids or liquid mixtures, such as a mixture of glycol and water, may be involved.
Kraftoverføringen 4 kan hensigtsmæssigt udgøres af en hydraulikcylinder eller tilsvarende aggregat, som 20 med en ende er fastgjort til føringen 6 og/eller overføringsorganet 7, og som drives af en hydraulikpumpe 5. Herved kan der opnås et yderst kompakt apparat, som arbejder lydløst og effektivt uden behov for komprimeret luft.Conveniently, the power transmission 4 may be constituted by a hydraulic cylinder or similar assembly 20 which is end-attached to the guide 6 and / or the transfer member 7, and which is driven by a hydraulic pump 5. This provides an extremely compact device which operates silently and efficiently. without the need for compressed air.
25 Drivorganet 3's bevægelse kan naturligvis også tilvejebringes på anden måde end gennem et frit fald. Det er f.eks. muligt at udsætte drivorganet for en drivende kraftpåvirkning fra hydraulikorganer eller lignende organer. Ved passende udformning af overføringsor-30 ganet 7 kan apparatet også anvendes til at udsætte en genstand for trækkraft i stedet for trykkraft.The movement of the drive means 3 can, of course, also be provided by other means than through a free fall. It is e.g. it is possible to expose the drive means to a driving force exerted by hydraulic or similar means. By appropriately designing the transfer member 7, the apparatus may also be used to expose an object to traction instead of compressive force.
Ved udførelsesformen i fig. 2, hvor spalten 16 er snæver, kan det eventuelt være hensigtsmæssigt, såfremt man for at lette optrækningen af drivorganet fra 35 beholderen 10 forsyner enden 9 og/eller beholderen 1 med et ikke vist kontraventilarrangement, som åbnesIn the embodiment of FIG. 2, where the slot 16 is narrow, it may be appropriate if, in order to facilitate the pull-up of the drive means from the container 10, the end 9 and / or the container 1 is provided with a non-check valve arrangement which is opened.
Claims (8)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE7613604 | 1976-12-03 | ||
| SE7613604A SE413603B (en) | 1976-12-03 | 1976-12-03 | DEVICE FOR DRIVING FOREMAL MEDIUM PRESSURE OR TOWING POWER |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK534677A DK534677A (en) | 1978-06-04 |
| DK154030B true DK154030B (en) | 1988-10-03 |
| DK154030C DK154030C (en) | 1989-03-20 |
Family
ID=20329654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK534677A DK154030C (en) | 1976-12-03 | 1977-12-01 | DEVICE FOR DRIVING OBJECTS THROUGH PRESSURE OR TENSION, e.g. FOR DAMAGE IN EARTH |
Country Status (7)
| Country | Link |
|---|---|
| DE (1) | DE2753806A1 (en) |
| DK (1) | DK154030C (en) |
| FI (1) | FI63457C (en) |
| GB (1) | GB1576966A (en) |
| NL (1) | NL7713296A (en) |
| NO (1) | NO152707C (en) |
| SE (1) | SE413603B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3545880A1 (en) * | 1985-12-23 | 1987-06-25 | Lindenmeyer Gmbh & Co Geb | DIESEL FRAME |
| NL2023408B1 (en) | 2019-06-28 | 2021-02-01 | Ihc Holland Ie Bv | Pile-driver and method |
| NL2023409B1 (en) | 2019-06-28 | 2021-02-01 | Ihc Holland Ie Bv | Pile-driver and method |
| NL2025191B1 (en) * | 2019-06-28 | 2021-05-31 | Ihc Holland Ie Bv | Pile-driver and method |
| WO2020263095A1 (en) | 2019-06-28 | 2020-12-30 | Ihc Holland Ie B.V. | Pile-driver assembly and method of using it |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2358655A1 (en) * | 1972-11-28 | 1974-05-30 | Bolt Associates Inc | RAM |
| SE388647B (en) * | 1971-08-26 | 1976-10-11 | Stabilator Ab | DEVICE FOR DRIVING FOREMAL BY PRESSURE OR TRACTION |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1872694U (en) * | 1963-01-09 | 1963-05-22 | Heinrich Vogler | IMPACT TOOL, IN PARTICULAR BUMPER HAMMER OD. DGL. |
| DE2014717A1 (en) * | 1970-03-26 | 1971-10-07 | Hillesheim, Hans 6781 Hohfroschen | Inserts for ram heads |
| SE370099B (en) * | 1971-10-18 | 1974-09-30 | B Ludvigson |
-
1976
- 1976-12-03 SE SE7613604A patent/SE413603B/en not_active IP Right Cessation
-
1977
- 1977-11-28 FI FI773601A patent/FI63457C/en not_active IP Right Cessation
- 1977-11-30 GB GB49961/77A patent/GB1576966A/en not_active Expired
- 1977-12-01 DK DK534677A patent/DK154030C/en not_active IP Right Cessation
- 1977-12-01 NO NO774110A patent/NO152707C/en unknown
- 1977-12-01 NL NL7713296A patent/NL7713296A/en not_active Application Discontinuation
- 1977-12-02 DE DE19772753806 patent/DE2753806A1/en not_active Ceased
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE388647B (en) * | 1971-08-26 | 1976-10-11 | Stabilator Ab | DEVICE FOR DRIVING FOREMAL BY PRESSURE OR TRACTION |
| DE2358655A1 (en) * | 1972-11-28 | 1974-05-30 | Bolt Associates Inc | RAM |
Also Published As
| Publication number | Publication date |
|---|---|
| DK154030C (en) | 1989-03-20 |
| FI63457B (en) | 1983-02-28 |
| SE413603B (en) | 1980-06-09 |
| GB1576966A (en) | 1980-10-15 |
| FI63457C (en) | 1983-06-10 |
| NL7713296A (en) | 1978-06-06 |
| SE7613604L (en) | 1978-06-04 |
| DK534677A (en) | 1978-06-04 |
| FI773601A (en) | 1978-06-04 |
| DE2753806A1 (en) | 1978-06-08 |
| NO152707C (en) | 1985-11-06 |
| NO774110L (en) | 1978-06-06 |
| NO152707B (en) | 1985-07-29 |
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| Date | Code | Title | Description |
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| PUP | Patent expired |