US3814357A - Steel spring insulator - Google Patents

Steel spring insulator Download PDF

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Publication number
US3814357A
US3814357A US00135946A US13594671A US3814357A US 3814357 A US3814357 A US 3814357A US 00135946 A US00135946 A US 00135946A US 13594671 A US13594671 A US 13594671A US 3814357 A US3814357 A US 3814357A
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Prior art keywords
insulator
spring
connecting element
compression spring
members
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Expired - Lifetime
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US00135946A
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English (en)
Inventor
P Rontgen
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IT- ISOLIER- TECHNIK und SCHALLSCHUTA GmbH
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ISOLIERTECHNIK GRASSMANN H
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Assigned to IT- ISOLIER- TECHNIK UND SCHALLSCHUTA GMBH, reassignment IT- ISOLIER- TECHNIK UND SCHALLSCHUTA GMBH, ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ISOLIER TECHNIK HORST GRASSMANN
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/04—Wound springs
    • F16F1/12—Attachments or mountings
    • F16F1/128—Attachments or mountings with motion-limiting means, e.g. with a full-length guide element or ball joint connections; with protective outer cover

Definitions

  • Striker 1 5 7 ABSTRACT A steel spring insulator, to enable machines or sets of machinery, particularly fans, ventilators, blowers etc., to be installed in such a way that they will be insulated from vibrations and protected from sound conducted through solids, the said insulator comprising a lower portion firmly affixed to the bearing surface of a foundation or a supporting structure, and an upper portion affixed underneath the base of the machine or set of machinery or underneath a bearer thereof, at least one steel helical compression spring being provided between the said two portions and being surrounded by the upper and/or lower portion on all sides and with ample clearance, at least one connecting element being provided which interconnects the upper and the lower portion and keeps the compression spring in a prestressed state, wherein the connecting element consists of at least one flexible traction means which is affixed by one end portion to the lower part and by the other end portion to the upper part and of which the length is such that when the insulator is not subjected to a load the traction means is loaded and the
  • This invention relates to a steel spring insulator, to enable machines or sets of machinery, particularly fans, ventilators, blowers etc., to be installed in such a way that they will be insulated from vibrations and protected from sound conducted through solids, the said insulator comprising a lower portion firmly affixed to the bearing surface of a foundation or a supporting structure, and an upper portion affixed underneath the base of the machine or set of machinery or underneath a bearer thereof, at least one steel helical compression spring being provided between the said two portions and being surrounded by the upper and/or lower portion on all sides and with ample clearance, at least one connecting element being provided which interconnects the upper and the lower portion and keeps the compression spring in a prestressed state.
  • Steel spring insulators of this kind can be used, as a general principle, in all machines or sets of machinery which are to be installed in such a way as to be insulated from vibrations and protected from sound conducted through solids, such as compressors, pumps, machine tools etc. Vibration or sound conduction occurs with widely varying frequencies in a considerable variety of machines and installations. To ensure optimum vibration damping and insulation efficiency it is essential that the natural frequencies of the insulators should be far below the frequencies of the vibrations to be combated. Forthis reason steel spring insulators are suitable first and foremost for the erection of machines or sets of machinery in such a Way as to insulate them from vibrations and protect them from sound conducted through solids when the vibrations occur in the said machinery at particularly low frequencies.
  • the upper and the lower part are substantially pot-shaped and of different diameters.
  • the pot-shaped upper part and the similarly constructed lower part face towards each other by their openings and overlap telescopically over a part of their axial length.
  • the upper part embraces the upper edge of the lower part, in order to prevent the ingress of dirt and moisture into the internal space formed between the two parts.
  • the said space contains the helical compression spring which rests bothagainst the inside of the upper part and against that of the lower part.
  • the interior of the upper part contains a screw which takes a coaxial course to the longitudinal central axis of the steel spring insulator and which passes through a boring in the lower part of the latter.
  • the head of the screw is situated in a free space which is provided in the lower part and which is situated on that side of the base of the latter which faces away from the upper part.
  • the floor of the lower part is given the shape of a truncated cone, and the boring through which the shank of the screw passes is provided in the zone of the central longitudinal axis, in the upper end face of the aforementioned frustum-shaped portion of the floor.
  • the internal diameter of the said boring is only slightly greater than the external diameter of the shank of the screw, so that the latter can perform, inside the boring, an axial movement corresponding to the relative movements of the upper and the lower part.
  • the internal diameter of the boring is smaller than the external diameter of the head of the screw, so that the latter will not go through the boring and the screw has to be pushed through the boring in the floor of the lower side, when the steel spring insulator system is being assembled, and can only then be firmly screwed into the likewise frustum-shaped floor of the upper part.
  • the length of the screw is such that even when the steel spring insulator is fully relieved the compression spring is still slightly prestressed. This operation interconnects the upper and the lower part and prevents the steel spring insulator system from coming apart.
  • a further major drawback of the known steel spring insulator resides in the fact that the upper and the lower part are liable to tilt to such an extent as to cause jamming, as a result of which the necessary free relative motion between the two parts is completely nullified.
  • jamming of this kind may occur above all between the shank of the screw and the internal wall of the boring in the base of the lower part. This jamming between the shank of the screw and the internal wall of the boring in the base of the lower part is due to the comparatively limited clearance between the said shank and the said internal surface.
  • steel spring insulators are required which are provided with special upper and lower parts of the welded type, of which the cost, as already mentioned, is far higher than that of cast upper or lower parts.
  • steel spring insulators For particularly great strokes and heavy loads, use is also made of steel spring insulators with a number of compression springs and connecting elements of the welded housing type. but these systems suffer, mutatis mutandis, from the disadvantages already mentioned.
  • the present invention provides a steel spring insulator, to enable machines or sets of machinery, particularly fans, ventilators, blowers etc., to be installed in such a way that they will be insulated from vibrations and protected from sound conducted through solids, the said insulator comprising a lower portion firmly affixed to the bearing surface of a foundation or a supporting structure, and an upper portion affixed underneath the base of the machine or set of machinery or underneath a bearer thereof, at least one steel helical compression spring being provided between the said two portions and being surrounded by the upper and/or lower portion on all sides and with ample clearance, at least one connecting element being provided which interconnects the upper and the lower portion and keeps the compression spring in a prestressed state, wherein the connecting element consists of at least one flexible traction means which is affixed by one end portion to the lower part and by the other end portion to the upper part and'of which the length is such that when the insulator is not subjected to a load the traction means is loaded and
  • a further advantage of the steel spring insulator to which the invention relates resides in the fact that owing to the elimination of the screw and also of the boring in the base of the lower part, through which boring the screw in the known system-has to pass, no jamming can any longer occur between the upper and the lower part. Since jamming between the two parts can be reliably avoided at the other points likewise, by selecting the appropriate diameters for those of their respective portions which overlap each other telescopically, all jamming between the upper and the lower part of the steel spring insulator covered by the invention is avoided. This also applies when the spring travel of the compression spring is particularly great during operation, and likewise in cases in which considerable horizontal vibrations take place between the said two parts.
  • the connecting element constructed as a flexible traction means automatically adapts itself to all these relative movements, so that the entire steel spring insulator to which the invention relates functions during operation in the manner of a steel spring without a housing, i.e., the upper and the lower parts are freely movable in respect of each other in all direction, and the connecting element betweenthem has no guiding properties.
  • the steel spring insulator covered by the invention therefore likewise renders it unnecessary to limit the excursion of the compression spring to a maximum of 20 mm.
  • the compression spring can be designed in accordance with the load occurring, in such a way that in the course of its operation it can cover a path of, for example, 60 mm and over. This has the advantage of providing a very soft spring characteristic, exerting an effective damping action in the case of all vibrations with very low rotation speeds.
  • the steel spring insulator to which the invention relates thus makes it possible, for instance, to erect machines or sets of machinery in such a way that they are insulated from vibrations, even in the case of very low rotation speeds, e.g.
  • the steel spring insulator covered by the invention is far simpler in its construction, because the frustum-shaped base can be dispensed with, at all events where the lower part is concerned.
  • the proposed insulator can be assembled more easily. This reduces the cost of production and thus enables it to be manufactured more economically. It can also be made to a more moderate over-all height than the known steel spring insulator, which in many cases is an essential requirement.
  • only one flexible traction means is associated with each helical compression spring and is approximately coaxial to the said spring, passing through its centre, the spring together with the traction means being surrounded on all sides, and with ample clearance, by the lower end and the upper part of the insulator.
  • the traction means approximately coaxial with the helical compression spring and passing through the centre thereof, in this embodiment of the insulator, is situated inside the spring in such a way as to be protected on all sides, and occupies no additional space to one side of the spring, so that the upper and the lower part of the insulator can be made particularly small and compact.
  • a further essential advantage of this method of arranging the traction means resides in the fact that the points of application for the force of the helical compression spring and that of the traction means are situated on one and the same axis, so that no undesirable tilting can take place between the upper and the lower part of the insulator.
  • both the helical compression spring and the traction means passing through its centre are effectively protected by the upper and the lower part of the insulator, which surround these two components on all sides and with ample clearance, against extraneous mechanical stresses and also against the ingress of dirt.
  • the steel spring insulator to which the invention relates is only provided with one helical compression spring and one connecting element, constructed as a flexible traction device and situated between the upper and the lower part
  • the invention extends to insulators of the kind comprising two or more helical compression springs between the said two parts, which are then interconnected by two or more flexible traction devices.
  • the traction means consists of a metal chain, preferably a welded chain with steel links. It is also possible, however, for the traction means to consist of a cable, preferably of steel.
  • the aforementioned traction devices are particularly suitable for steel. spring insulators which are designed for high loads and of which the compression springs are consequently very strong. For this reason the traction device employed must itself be capable of standing up to heavy loads, since otherwise, with the compression spring not loaded, it would break as a result of the prestressing.
  • the aforementioned traction devices are particularly strong, resisting both permanent loads and high temperatures.
  • a traction device of this kind can never transmit pressures, as would be liable to occur, as a general principle, if the steel spring insulator were subjected to a force greater than the prestressing force of the compression spring, and if use were made of a screw such as that adopted in the known construction. In the known system this compressive stress, which would nullify the vibration-insulating effect of the compression spring, is avoided by means of a corresponding free space, to which, however, certain limits are set by constructional factors.
  • the design to which the invention relates and its traction means mentioned in the foregoing necessitate no special free space, on the other hand, but hang loosely in the interior of the free space already provided, this being surrounded by the helical compression spring.
  • the latter also applied to a traction means consisting of a cable, thread or chain of plastics which can likewise be employed according to an additional characteristic of the invention.
  • the traction means prefferably affixed to the upper and/or the lower part. If the traction means is detachably affixed in this way it can be removed and replaced without difficulty, and the task of dismantling or assembling the steel spring insulator proves a simple one.
  • a mounting and guiding ring made of a material constituting an insulant against sound conducted through solids, such as a ring made of plastics or rubber.
  • a mounting and guiding ring of this kind proves an advantageous means of breaking the transmission of such sound from the upper part to the compression spring or from this latter to the lower part, so that the insulating effect of the steel spring insulator covered by the invention is improved still further.
  • a mounting and guiding ring of this kind provides a reliable surface for the compression spring to rest against the upper or lower part, uneven places due to the manufacturing process being compensated at the same time.
  • a mounting and guiding ring of this kind is capable of securing the upper part and the compression spring, or the compression spring and the lower part, as the case may be, in their correct positions in a radial direction.
  • the upper and the lower part of the spring insulator centre themselves solely via the compression spring. The latter must therefore be mounted in the lower part and in the upper part. This result, however, can also be achieved by means of appropriate attachments and recesses.
  • the compression spring it is possible, for example, for the compression spring to be gripped by its outer diameter in the lower part and by its inner diameter in the upper part.
  • that component of the insulator which is situated nearest to the compression spring as viewed in the radial direction, and preferably the lower part, comprises a widened portion, turned recess or the like, serving to increase the clearance provided all round between the compression spring and the component.
  • a widened, turned or similar portion of this kind prevents the compression spring from making impact on the component in question, which would cause noise in operation.
  • a widened, turned or similar part of this kind enables the spring to oscillate over a considerable distance in the radial direction likewise, so that even considerable horizontal vibrations can be absorbed and damped, without the jamming or even damage, as well as acoustic bridges, such as are liable to occur in the known systems.
  • the upper and/or lower part in many cases it is of advantage for the upper and/or lower part to be provided with a device enabling the bearing surfaces of the insulator to be adjusted in height.
  • a height-adjusting device of this kind on the steel spring insulators it is possible not only i to level out the machinesor sets of machinery in a simple manner but also to compensate even considerable gradients in the bearing surfaces of the foundations or supporting structures.
  • a height-adjusting device of this kind with an ample stroke, can be used with particular advantage and without difficulty in the steel spring insulator covered by the invention, because with this latter, in contradistinction to the known design, there is no reason to fear jamming of individual parts of the insulator.
  • At least the upper and/or the lower part may consist of an oil-, petroland acid-resisting synthetic material, characterized by considerable tenacity and resistance to abrasion. Plastics with these properties are to be found, for example, among the PVCs or polyethylenes.
  • FIG. I is a vertical section of a steel spring insulator according to the invention, without height-adjusting device, and
  • FIG. 2 is a similar view of a steel spring insulator provided with a height-adjusting device.
  • FIG. 1 shows a steel spring insulator 1 which is pro vided with a pot-shaped upper part 2 and with a lower part 3 likewise substantially pot-shaped.
  • the lower part 3 is provided with flange-like attachments 3a which serve to enable the lower part 3 to be affixed to a foundation 4.
  • Securing screws 5 are used for this latter purpose and, in FIG. 1, are merely indicated by dot-anddash lines.
  • the upper part 2 and the lower part 3 face towards each other by their openings and overlap each other telescopically by their outer edge zones. They form one common internal space 6 containing a steel helical compression spring 7.
  • the helical compression spring 7 rests both on the base of the lower part 3 and on that of the upper part 2.
  • a mounting and guiding ring 8 consisting of a material, such as plastics or rubber, acting as an insulant against sound conducted through solids.
  • the base of the pot-shaped upper part 2 is frustum-shaped in the zone of the longitudinal central axis.
  • An attachment 2a of the shape of a truncated zone extends downwards.
  • a chain 9 permanently attached by its lower end portion to the base of the lower part 3 of the insulator.
  • the chain 9 is coaxial with the helical compression spring 7 and passes through the center of this latter.
  • the steel spring insulator l is shown in its loaded state, the
  • the radial dimensions of the upper part 2, the lower part 3 and the helical compression spring 7 are adapted to one another, as may be clearly seen from FIG. 1, in such a way that a considerable radial clearance is provided between these separate parts, and this clearance can be made much greater than implied by the drawings. According to the particular purpose for which the steel spring insulator l is to be used, this clearance can be made either greater or smaller.
  • the lower part 3 has a recess 3b produced by the turning process and providing a particularly ample distance between the said lower part 3 and the helical compression spring 7.
  • the said helical compression spring 7 can thus oscillate to a comparatively considerable distance in the radial direction likewise, without making impact with the lower part 3.
  • the turned recess 3b does not extend as far as the base of the lower part 3 but terminates in the zone of the last turn of the compression spring 7. The said compression spring 7 is thus satisfactorily guided in the radial direction in the lower part 3, yet
  • FIG. 2 shows a steel spring insulator 1 constructed substantially on the same lines as the steel spring insulator illustrated in FIG. 1.
  • the steel spring insulator l in FIG. 2 differs from that shown in FIG. 1 in that in place of the chain 9 a cable 9a is used as the traction means interconnecting the upper part 2 and the lower part 3.
  • the steel spring insulator l in the embodiment shown in FIG. 2 is provided with a height-adjusting device 10 which consists of a bolt 11, two hexagonal nuts 12 and 13 and a supporting disc 14. The bolt 11 is screwed by its lower end portion into the base of the upper part 2.
  • the bolt 11 could also be connected with the upper part 2 by weld-
  • the lower hexagonal nut 12 enables the height of the supporting disc 14 on the bolt 11 to be adjusted, the said disc being provided with a through-boring.
  • the hexagonal nut 13 serves to secure the hexagonal nut 12, so that the height of the supporting disc 14 is firmly fixed, once the hexagonal nuts 12 and 13 have been tightened up.
  • the base of the machine or set of machinery which is not shown in FIG. 2, then rests on the upper side of the support disc 14, which side faces away from the upper and lower part 3 and 2 respectively of the steel spring insulator 1.
  • the stand'of the machine or installation or of a supporting beam will be situated between thesupporting disc 14 and the hexagonal nut 13, so that the said hexagonal nut 13 serves not only to secure the hexagonal nut 12 but also to secure the said machine stand.
  • a spring insulator for mounting machines, particularly fans, ventilators, blowers and the like, in a vibration and sound insulating manner, said insulator comprising a lower pot-shaped member having an upper open end and a lower closed end adapted to be fixed to a floor; an upper pot-shaped member having a lower open end and an upper closed end adapted to be connected to a machine to be mounted, each of said members having a peripheral wall, one of which surrounds the other with ample clearance; at least one compression spring abutting with opposite ends against the closed ends of said members so as to hold said members axially out of contact with each other, said spring being surrounded by the peripheral walls of said members spaced with ample clearance therefrom; and at least one flexible connecting element connected at opposite ends to said upper and lower member, respectively, said connecting element having a length such that when said insulator is not loaded, said connecting element is stressed and said spring maintained in pre-stressed condition, and said connecting element being relieved of its stress and hanging loosely after application of a load to said upper part
  • a spring insulator as defined in claim 1 and including a mounting and guiding ring sandwiched between at least one end of said spring and the closed end of the corresponding member, said ring being made from a material having sound damping properties.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vibration Prevention Devices (AREA)
  • Springs (AREA)
US00135946A 1970-04-22 1971-04-21 Steel spring insulator Expired - Lifetime US3814357A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19702019348 DE2019348A1 (de) 1970-04-22 1970-04-22 Stahlfederisolator
DE7014786U DE7014786U (de) 1970-04-22 1970-04-22 Stahlfederisolator

Publications (1)

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US3814357A true US3814357A (en) 1974-06-04

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Application Number Title Priority Date Filing Date
US00135946A Expired - Lifetime US3814357A (en) 1970-04-22 1971-04-21 Steel spring insulator

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US (1) US3814357A (fr)
AT (1) AT316242B (fr)
BE (1) BE766040A (fr)
CH (1) CH546357A (fr)
DE (2) DE2019348A1 (fr)
FR (1) FR2089999A5 (fr)
GB (1) GB1343037A (fr)
NL (1) NL7105318A (fr)

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4533109A (en) * 1980-10-22 1985-08-06 Gerb Gesellschaft fur Isolierung MBH & Co KG Elastic support unit
US4993677A (en) * 1987-10-01 1991-02-19 Patterson Gary W Clamp-on support leg for trailer tongues
US5090657A (en) * 1990-08-06 1992-02-25 Tecumseh Products Company Cable reinforced mounting system
US5342179A (en) * 1993-03-05 1994-08-30 Tecumseh Products Company Compressor shock absorbing mount assembly
US5657649A (en) * 1994-09-01 1997-08-19 Daewoo Electronics Co., Ltd. Full-automatic washing machine having a vibration damping assembly
US5810038A (en) * 1996-08-28 1998-09-22 Carpin Manufacturing, Inc. Medical walker foot with collapsible tip
US6352247B1 (en) * 1998-12-17 2002-03-05 Denso Corporation Mounting structure of compressor for vehicle air conditioner to vehicle
US6789790B2 (en) * 2002-06-18 2004-09-14 Frank H. Speckhart Helical coil spring damper assembly
US20050039976A1 (en) * 2003-08-18 2005-02-24 Vu Vinh Thanh Vibration-control platform
US20050084355A1 (en) * 2003-10-17 2005-04-21 Don Zoran Apparatus and method for damping vibration in a machine tool
ES2302445A1 (es) * 2006-10-06 2008-07-01 Suspensiones Elasticas Del Norte S.L. Nuevo sistema de nivelacion y de amortiguacion de vibraciones.
US20090260322A1 (en) * 2008-04-17 2009-10-22 Heidelberger Druckmaschinen Aktiengesellschaft Packaging machine for goods in blister shell moldings to be sealed with a blister film
US20100219572A1 (en) * 2009-03-02 2010-09-02 Gary Back Independent Spring Cartridge
US20140014434A1 (en) * 2012-07-12 2014-01-16 Wistron Corporation Speaker device with vibration absorbing function and audio display device therewith
US20140191454A1 (en) * 2011-09-20 2014-07-10 Otis Bed Manufacturing Company, Inc. Telescoping spring assembly for mattresses and the like
US8833511B2 (en) * 2010-07-30 2014-09-16 Tokkyokiki Corporation Insulator for audio and method for evaluating same
US8857560B1 (en) * 2013-04-22 2014-10-14 Lite-On Electronics (Guangzhou) Limited Vibration-proof sound box and engagement structure of the same
US9276522B1 (en) * 2015-06-09 2016-03-01 Nextracker Inc. Mass damper for solar tracker
CN107435704A (zh) * 2017-09-07 2017-12-05 中国船舶重工集团公司第七〇九研究所 一种带刻度标识的船舶大型减振装置用限位器
US20190009628A1 (en) * 2017-07-05 2019-01-10 Hyundai Motor Company Bracket apparatus for composite spring
US10184538B2 (en) * 2014-06-02 2019-01-22 Lisega SE Telescopable spring support
US11268709B1 (en) * 2020-07-07 2022-03-08 James Zeeff Vibration-dampening support for an HVAC unit
US20240319657A1 (en) * 2023-03-20 2024-09-26 Ricoh Company, Ltd. Spring mounting structure, sheet housing device, waste toner container, and image forming apparatus
US12426177B2 (en) * 2022-01-22 2025-09-23 Pegatron Corporation Buffer module and electronic device using the same

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CN104912977A (zh) * 2015-06-15 2015-09-16 太仓市惠得利弹簧有限公司 一种防尘内保护弹簧

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US944461A (en) * 1908-12-23 1909-12-28 Alden C Olander Fastening device.
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US1817255A (en) * 1925-05-29 1931-08-04 Jesse G Hawley Coupling
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Cited By (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4533109A (en) * 1980-10-22 1985-08-06 Gerb Gesellschaft fur Isolierung MBH & Co KG Elastic support unit
US4993677A (en) * 1987-10-01 1991-02-19 Patterson Gary W Clamp-on support leg for trailer tongues
US5090657A (en) * 1990-08-06 1992-02-25 Tecumseh Products Company Cable reinforced mounting system
US5342179A (en) * 1993-03-05 1994-08-30 Tecumseh Products Company Compressor shock absorbing mount assembly
US5657649A (en) * 1994-09-01 1997-08-19 Daewoo Electronics Co., Ltd. Full-automatic washing machine having a vibration damping assembly
US5810038A (en) * 1996-08-28 1998-09-22 Carpin Manufacturing, Inc. Medical walker foot with collapsible tip
US6352247B1 (en) * 1998-12-17 2002-03-05 Denso Corporation Mounting structure of compressor for vehicle air conditioner to vehicle
US6789790B2 (en) * 2002-06-18 2004-09-14 Frank H. Speckhart Helical coil spring damper assembly
US7743882B2 (en) * 2003-08-18 2010-06-29 Vinh Thanh Vu Vibration-control platform
US20050039976A1 (en) * 2003-08-18 2005-02-24 Vu Vinh Thanh Vibration-control platform
US7125211B2 (en) 2003-10-17 2006-10-24 Racer Machinery International Inc. Apparatus and method for damping vibration in a machine tool
US20050084355A1 (en) * 2003-10-17 2005-04-21 Don Zoran Apparatus and method for damping vibration in a machine tool
ES2302445A1 (es) * 2006-10-06 2008-07-01 Suspensiones Elasticas Del Norte S.L. Nuevo sistema de nivelacion y de amortiguacion de vibraciones.
ES2302445B1 (es) * 2006-10-06 2009-05-05 Suspensiones Elasticas Del Norte S.L. Nuevo sistema de nivelacion y de amortiguacion de vibraciones.
US20090260322A1 (en) * 2008-04-17 2009-10-22 Heidelberger Druckmaschinen Aktiengesellschaft Packaging machine for goods in blister shell moldings to be sealed with a blister film
US8950163B2 (en) * 2008-04-17 2015-02-10 Heidelberger Druckmaschinen Ag Packaging machine for goods in blister shell moldings to be sealed with a blister film
US20100219572A1 (en) * 2009-03-02 2010-09-02 Gary Back Independent Spring Cartridge
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Also Published As

Publication number Publication date
BE766040A (fr) 1971-10-21
DE7014786U (de) 1970-12-23
NL7105318A (fr) 1971-10-26
DE2019348A1 (de) 1971-11-04
AT316242B (de) 1974-06-25
GB1343037A (en) 1974-01-10
CH546357A (de) 1974-02-28
FR2089999A5 (fr) 1972-01-07

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