EP0515715B1 - Linear actuation - Google Patents
Linear actuation Download PDFInfo
- Publication number
- EP0515715B1 EP0515715B1 EP91108772A EP91108772A EP0515715B1 EP 0515715 B1 EP0515715 B1 EP 0515715B1 EP 91108772 A EP91108772 A EP 91108772A EP 91108772 A EP91108772 A EP 91108772A EP 0515715 B1 EP0515715 B1 EP 0515715B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- linear drive
- drive according
- longitudinal slot
- additional air
- region
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/082—Characterised by the construction of the motor unit the motor being of the slotted cylinder type
Definitions
- the invention relates to a linear drive with a longitudinally slotted cylinder housing, in the interior of which a drive element is arranged such that it can be moved to and fro in a reciprocating manner and engages with a lateral extension through the longitudinal slot, which on the outside is covered by an outer sealing tape extending over the length of the housing and on its inside is sealed by an inner sealing tape which also extends over the length of the housing, both of which are lifted from the longitudinal slot in the region of the attachment and are each guided through a tunnel-shaped channel in the drive element.
- Linear drives of this type are known.
- the drive element in the interior of the cylinder housing is a piston which is sealed on the end face from the interior.
- the longitudinal slot is also sealed on its outside and on the inside by a sealing tape.
- the piston moves due to pressure differences on both ends of the piston.
- a linear drive in which a screw spindle is arranged within the housing and, when rotating, shifts a threaded element in the longitudinal direction.
- a small amount of abrasion occurs when the drive element moves.
- the outer sealing tape it is possible that in the area in which this sealing tape of the edges of the longitudinal slot, abrasion reaches the outside. This is normally not a problem.
- the compressed air also contains minor impurities that can also get into the outside space.
- contaminants can get into the interior of the linear drive. This can be dust or particulate contaminants, for example. If the linear drive is to be used in an environment in which solvents are used, solvents can also get into the interior of the cylinder housing and there deteriorate or destroy the lubrication used to reduce friction. Deposits can also worsen the sealing of the sealing tape.
- the invention has for its object to provide a linear drive, the field of application is expanded so that it can be used both in clean rooms and in rooms with an aggressive environment.
- the invention provides in a linear drive of the type mentioned that it has at least one additional air connection which leads into the space between the two sealing tapes and can be connected to a device for generating and maintaining a pressure from the outside prevailing pressure of the cylinder housing is different.
- This linear drive provided by the invention can be used both in clean rooms and in rooms with an aggressive environment.
- the application of a negative pressure which is lower than the pressure in the clean room reliably prevents abrasion or contamination of the compressed air used for driving from the cylinder housing from entering the clean room in an uncontrolled manner. Due to the negative pressure between the sealing tapes, these are Contaminants sucked off.
- the air connection between the sealing tapes creates and maintains a more or less strong overpressure, i.e. a pressure that is higher than the pressure in the vicinity of the cylinder. This prevents dusts or vapors from getting inside the cylinder housing. In rooms with an aggressive environment, the slight contamination coming from inside the cylinder does not interfere.
- the invention proposes in particular that the additional air connection is arranged in the region of the end of the cylinder housing, particularly preferably in the region of the longitudinal slot. In this way, the designs for the linear drives hardly need to be changed.
- the linear drive shown in Figure 1 contains a cylindrical housing 1 which contains a slightly eccentrically offset circular cylindrical interior 2.
- the housing 1 is closed off at each end by a head piece 3.
- the cylindrical housing 1 has a longitudinal slot 4 which extends continuously over the entire length of the cylindrical housing 1.
- a drive element designed as a piston 5 is arranged to be longitudinally displaceable.
- the piston is in Area of its two ends sealed from the interior 2 by a circumferential seal 6.
- a lateral extension 7 is attached approximately centrally with respect to its longitudinal extent, which extends through the longitudinal slot 4 to the outside.
- a bracket 8 is attached to the extension 7, on which the movement of the piston 5 can be removed.
- the longitudinal slot 4 is sealed on its outside by an outer sealing tape 9. On its inside, the longitudinal slot 4 is sealed by an inner sealing tape 10. Both sealing tapes 9, 10 extend in the longitudinal direction of the linear drive and are of course wider than the longitudinal slot 4. Since the sealing tapes 9, 10 are wider than the longitudinal slot 4 and the extension 7 are narrower than the longitudinal slot 4, both sealing tapes 9, 10 become in the area of the neck 7 lifted from the longitudinal slot 4 and passed outwards or inwards through the bracket 8 or the piston 5. This area, in which both sealing tapes lift off from the longitudinal slot 4, moves with the movement of the piston 5. In the example shown, the piston 5 is moved by compressed air, which is introduced into the head pieces 3 by corresponding connecting pieces. In this respect, the linear drive is known.
- the sealing tapes are made of steel, for example, and are pressed onto the edges of the longitudinal slot with the aid of magnets.
- the outer sealing tape 9 is clamped in the region of its two ends with the aid of a screwed-on block 11.
- the block 11 is screwed to the housing 1 with the aid of two screws 12 with the interposition of a seal.
- the block 11 contains a threaded bore 13 which can be connected to a nipple for a compressed air line.
- the bore 13 leads into the space between the two sealing tapes 9, 10, since the sealing tape 9 ends in front of the bore 13 in the longitudinal direction.
- the opposite end of the linear drive also contains such a block 11 with an air connection.
- Figure 2 shows a plan view of the end of the linear drive on an enlarged scale.
- the block 11 is screwed directly adjacent to the head piece 3 with the aid of the screws 12 with the housing 1. He clamps the end of the outer sealing tape 9.
- FIG. 3 The same arrangement is also shown in FIG. 3.
- a further seal 14 is interposed between the inner sealing band and the end of the block 11 on the head piece side.
- a vacuum is applied via the bore 13 to the space between the outer and the inner sealing tape 10, that is to say a pressure which is lower than the pressure prevailing in the clean room.
- the size of the negative pressure depends on the circumstances of the individual case. If, during the movement of the piston, the compressed air contains certain impurities that get into the space between the two sealing tapes, these are sucked off without being able to get outside. Even when the lip 16 arranged on the bracket 8 slides off, any abrasion that may arise can be sucked off by the negative pressure. This applies in particular when the lip 16, which is acted upon by a round cord ring 15, is designed accordingly is.
- the linear drive proposed by the invention is to be used in an aggressive environment, a slight excess pressure is generated by the air connection in the space between the two sealing tapes 9, 10, the height of which also depends on the circumstances of the individual case. This overpressure is reduced where dust, chips or vapors could penetrate. It therefore prevents them from entering the interior of the linear drive.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
- Fluid-Pressure Circuits (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Description
Die Erfindung betrifft einen Linearantrieb mit einem längsgeschlitzten Zylindergehäuse, in dessen Innenraum ein Antriebselement hin- und hergehend beweglich antreibbar angeordnet ist und mit einem seitlichen Ansatz durch den Längsschlitz hindurchgreift, der an seiner Außenseite durch ein sich über die Länge des Gehäuses erstreckendes äußeres Dichtband und an seiner Innenseite durch ein sich ebenso über die Länge des Gehäuses erstreckendes inneres Dichtband abgedichtet ist, die beide im Bereich des Ansatzes von dem Längsschlitz abgehoben und durch je einen tunnelförmigen Kanal im Antriebselement hindurchgeführt sind.The invention relates to a linear drive with a longitudinally slotted cylinder housing, in the interior of which a drive element is arranged such that it can be moved to and fro in a reciprocating manner and engages with a lateral extension through the longitudinal slot, which on the outside is covered by an outer sealing tape extending over the length of the housing and on its inside is sealed by an inner sealing tape which also extends over the length of the housing, both of which are lifted from the longitudinal slot in the region of the attachment and are each guided through a tunnel-shaped channel in the drive element.
Linearantriebe dieser Art sind bekannt. Bei einem z.B. aus der DE-A-3 520 419 bekannten Typ dieses Linearantriebs ist das Antriebselement im Inneren des Zylindergehäuses ein Kolben, der stirnseitig gegenüber dem Innenraum abgedichtet ist. Auch der Längsschlitz ist auf seiner Außenseite und auf seiner Innenseite durch je ein Dichtband abgedichtet. Die Bewegung des Kolbens erfolgt durch Druckunterschiede auf beiden Stirnseiten des Kolbens.Linear drives of this type are known. With e.g. from DE-A-3 520 419 known type of this linear drive, the drive element in the interior of the cylinder housing is a piston which is sealed on the end face from the interior. The longitudinal slot is also sealed on its outside and on the inside by a sealing tape. The piston moves due to pressure differences on both ends of the piston.
Ebenfalls bekannt ist ein Linearantrieb, bei dem innerhalb des Gehäuses eine Schraubenspindel angeordnet ist, die bei Drehung ein mit einem Gewinde versehendes Element in Längsrichtung verschiebt.Also known is a linear drive, in which a screw spindle is arranged within the housing and, when rotating, shifts a threaded element in the longitudinal direction.
Bei der Bewegung des Antriebselementes entsteht in geringem Umfang ein Abrieb. Trotz des äußeren Dichtbandes ist es möglich, daß in dem Bereich, in dem dieses Dichtband von den Rändern des Längsschlitzes abhebt, Abrieb in den Außenraum gelangt. Dies ist im Normalfall auch nicht störend. Bei dem Antrieb des Kolbens durch Druckluft enthält auch die Druckluft kleinere Verunreinigungen, die ebenfalls in den Außenraum gelangen können. Anderseits können auch, vor allem im Bereich des Abhebens des Dichtbandes, Verunreinigungen von der Außenseite des Linearantriebs in sein Inneres gelangen. Dabei kann es sich beispielsweise um Staub oder partikelförmige Verunreinigungen handeln. Wenn der Linearantrieb in einer Umgebung angewendet werden soll, in der Lösungsmittel verwendet werden, so können auch Lösungsmittel in das Innere des Zylindergehäuses gelangen und dort die zur Reibungsverminderung verwendete Schmierung verschlechtern oder zerstören. Durch Ablagerungen kann sich auch die Abdichtung des Dichtbandes verschlechtern.A small amount of abrasion occurs when the drive element moves. Despite the outer sealing tape, it is possible that in the area in which this sealing tape of the edges of the longitudinal slot, abrasion reaches the outside. This is normally not a problem. When the piston is driven by compressed air, the compressed air also contains minor impurities that can also get into the outside space. On the other hand, especially in the area where the sealing tape is lifted off, contaminants can get into the interior of the linear drive. This can be dust or particulate contaminants, for example. If the linear drive is to be used in an environment in which solvents are used, solvents can also get into the interior of the cylinder housing and there deteriorate or destroy the lubrication used to reduce friction. Deposits can also worsen the sealing of the sealing tape.
Der Erfindung liegt die Aufgabe zugrunde, einen Linearantrieb zu schaffen, dessen Anwendungsbereich erweitert wird, so daß er sowohl in Reinräumen als auch in Räumen mit aggressiver Umgebung verwendet werden kann.The invention has for its object to provide a linear drive, the field of application is expanded so that it can be used both in clean rooms and in rooms with an aggressive environment.
Zur Lösung dieser Aufgabe sieht die Erfindung bei einem Linearantrieb der eingangs genannten Art vor, daß dieser wenigstens einen zusätzlichen Luftanschluß aufweist, der in den Raum zwischen den beiden Dichtbändern führt und mit einer Einrichtung zur Erzeugung und Aufrechterhaltung eines Drucks verbindbar ist, der von dem außerhalb des Zylindergehäuses herrschenden Druck verschieden ist.To achieve this object, the invention provides in a linear drive of the type mentioned that it has at least one additional air connection which leads into the space between the two sealing tapes and can be connected to a device for generating and maintaining a pressure from the outside prevailing pressure of the cylinder housing is different.
Dieser von der Erfindung vorgesehene Linearantrieb kann sowohl in Reinräumen als auch in Räumen mit aggressiver Umgebung verwendet werden. Bei der Verwendung in Reinräumen wird durch Anlegen eines Unterdrucks, der niedriger ist als der Druck in dem Reinraum, zuverlässig verhindert, daß Abrieb oder Verunreinigungen der zum Antrieb dienenden Druckluft aus dem Zylindergehäuse unkontrolliert in den Reinraum eintreten. Durch den Unterdruck zwischen den Dichtbändern werden diese Verunreinigungen abgesaugt.This linear drive provided by the invention can be used both in clean rooms and in rooms with an aggressive environment. When used in clean rooms, the application of a negative pressure which is lower than the pressure in the clean room reliably prevents abrasion or contamination of the compressed air used for driving from the cylinder housing from entering the clean room in an uncontrolled manner. Due to the negative pressure between the sealing tapes, these are Contaminants sucked off.
Handelt es sich dagegen um einen Raum mit aggressiver Umgebung, so wird durch den Luftanschluß zwischen den Dichtbändern ein mehr oder weniger starker Überdruck erzeugt und aufrechterhalten, also ein Druck, der höher ist als der Druck in der Umgebung des Zylinders. Auf diese Weise wird verhindert, daß Stäube oder Dämpfe in das Innere des Zylindergehäuses gelangen. In Räumen mit aggressiver Umgebung stören die aus dem Inneren des Zylinders kommenden geringen Verunreinigungen nicht.If, on the other hand, it is a room with an aggressive environment, the air connection between the sealing tapes creates and maintains a more or less strong overpressure, i.e. a pressure that is higher than the pressure in the vicinity of the cylinder. This prevents dusts or vapors from getting inside the cylinder housing. In rooms with an aggressive environment, the slight contamination coming from inside the cylinder does not interfere.
Auf diese Weise wird ein Linearantrieb mit einfachen Mitteln so abgeändert, daß sein Anwendungsbereich vergrößert wird.In this way, a linear drive is modified with simple means so that its field of application is enlarged.
Die Erfindung schlägt insbesondere vor, daß der zusätzliche Luftanschluß im Bereich des Endes des Zylindergehäuses angeordnet ist, insbesondere vorzugsweise im Bereich des Längsschlitzes. Auf diese Weise brauchen die Konstruktionen für die Linearantriebe kaum geändert zu werden.The invention proposes in particular that the additional air connection is arranged in the region of the end of the cylinder housing, particularly preferably in the region of the longitudinal slot. In this way, the designs for the linear drives hardly need to be changed.
In Weiterbildung der Erfindung kann vorgesehen sein, daß zwei zusätzliche Luftanschlüsse vorhanden sind, die insbesondere beide im Bereich des Endes des zylindrischen Gehäuses angeordnet sind.In a further development of the invention it can be provided that two additional air connections are provided, both of which are in particular arranged in the region of the end of the cylindrical housing.
Weitere Merkmale, Einzelheiten und Vorzüge der Erfindung ergeben sich aus den Ansprüchen, deren Wortlaut durch Bezugnahme zum Inhalt der Beschreibung gemacht wird, der folgenden Beschreibung einer bevorzugten Ausführungsform der Erfindung sowie anhand der Zeichnung. Hierbei zeigen:
- Fig. 1
- einen Längsschlitz durch einen Linearantrieb nach der Erfindung;
- Fig. 2
- eine Aufsicht auf das eine Ende des Linearantriebs in vergrößertem Maßstab;
- Fig. 3
- einen Teilschnitt durch das Ende des Linearantriebs der
Figur 1 in vergrößertem Maßstab.
- Fig. 1
- a longitudinal slot through a linear drive according to the invention;
- Fig. 2
- a plan view of one end of the linear drive on an enlarged scale;
- Fig. 3
- a partial section through the end of the linear drive of Figure 1 on an enlarged scale.
Der in Figur 1 dargestellte Linearantrieb enthält ein zylindrisches Gehäuse 1, das einen leicht exzentrisch versetzten kreiszylindrischen Innenraum 2 enthält. An beiden Stirnseiten ist das Gehäuse 1 durch je ein Kopfstück 3 abgeschlossen.The linear drive shown in Figure 1 contains a
Das zylindrische Gehäuse 1 weist einen Längsschlitz 4 auf, der sich durchgehend über die gesamte Länge des zylindrischen Gehäuses 1 erstreckt.The
Im Innenraum 2 ist ein als Kolben 5 ausgebildetes Antriebselement längs verschiebbar angeordnet. Der Kolben ist im Bereich seiner beiden Stirnenden durch je eine umlaufende Dichtung 6 gegenüber dem Innenraum 2 abgedichtet.In the
An dem Kolben 5 ist etwa mittig bezüglich seiner Längserstreckung ein seitlicher Ansatz 7 befestigt, der durch den Längsschlitz 4 nach außen greift. An der Außenseite ist an dem Ansatz 7 ein Bügel 8 befestigt, an dem die Bewegung des Kolbens 5 abgenommen werden kann.On the piston 5, a lateral extension 7 is attached approximately centrally with respect to its longitudinal extent, which extends through the
Der Längsschlitz 4 ist an seiner Außenseite durch ein äußeres Dichtband 9 abgedichtet. An seiner Innenseite ist der Längsschlitz 4 durch ein inneres Dichtband 10 abgedichtet. Beide Dichtbänder 9, 10 erstrecken sich in Längsrichtung des Linearantriebs und sind natürlich breiter als der Längsschlitz 4. Da die Dichtbänder 9, 10 breiter als der Längsschlitz 4 und der Ansatz 7 schmaler als der Längsschlitz 4 sind, werden beide Dichtbänder 9, 10 im Bereich des Ansatzes 7 von dem Längsschlitz 4 abgehoben und nach außen bzw. nach innen durch den Bügel 8 bzw. den Kolben 5 hindurchgeführt. Dieser Bereich, in dem beide Dichtbänder von dem Längsschlitz 4 abheben, wandert mit der Bewegung des Kolbens 5. Im dargestellten Beispiel wird der Kolben 5 durch Druckluft bewegt, die durch entsprechende Anschlußstücke in den Kopfstücken 3 eingebracht wird. Insoweit ist der Linearantrieb bekannt. Die Dichtbänder bestehen beispielsweise aus Stahl und werden mit Hilfe von Magneten auf die Ränder des Längsschlitzes gedrückt.The
Das äußere Dichtband 9 wird im Bereich seiner beiden Enden mit Hilfe eines angeschraubten Klotzes 11 verklemmt. Der Klotz 11 wird mit Hilfe zweier Schrauben 12 unter Zwischenlage einer Dichtung an dem Gehäuse 1 angeschraubt. Der Klotz 11 enthält eine mit einem Gewinde versehene Bohrung 13, an die ein Nippel für eine Druckluftleitung anschließbar ist. Die Bohrung 13 führt in den Raum zwischen den beiden Dichtbändern 9, 10, da das Dichtband 9 in Längsrichtung vor der Bohrung 13 endet.The
Das gegenüberliegende Ende des Linearantriebs enthält ebenfalls einen derartigen Klotz 11 mit einem Luftanschluß.The opposite end of the linear drive also contains such a
Figur 2 zeigt eine Aufsicht auf das Ende des Linearantriebs in vergrößertem Maßstab. Der Klotz 11 wird unmittelbar angrenzend an das Kopfstück 3 mit Hilfe der Schrauben 12 mit dem Gehäuse 1 verschraubt. Er klemmt dabei das Ende des äußeren Dichtbandes 9 fest.Figure 2 shows a plan view of the end of the linear drive on an enlarged scale. The
Die gleiche Anordnung zeigt auch die Figur 3. Hier ist noch zu sehen, daß zwischen dem inneren Dichtband und dem kopfstückseitigen Ende des Klotzes 11 eine weitere Dichtung 14 zwischengelegt ist.The same arrangement is also shown in FIG. 3. Here it can also be seen that a further seal 14 is interposed between the inner sealing band and the end of the
Soll der von der Erfindung vorgeschlagene Linearantrieb in einem Reinraum verwendet werden, so wird über die Bohrung 13 an den Raum zwischen dem äußeren und dem inneren Dichtband 10 ein Unterdruck angelegt, also ein Druck, der niedriger ist als der im Reinraum herrschende Druck. Die Größe des Unterdrucks hängt von den Umständen des jeweiligen Einzelfalls ab. Wenn bei der Bewegung des Kolbens die Druckluft gewisse Verunreinigungen enthält, die in den Raum zwischen den beiden Dichtbändern gelangt, so werden diese abgesaugt, ohne daß sie ins Äußere gelangen können. Auch bei dem Abgleiten der an dem Bügel 8 angeordneten Lippe 16 möglicherweise entstehender Abrieb kann durch den Unterdruck abgesaugt werden. Dies gilt insbesondere dann, wenn die Lippe 16, die von einem Rundschnurring 15 beaufschlagt wird, entsprechend ausgebildet ist.If the linear drive proposed by the invention is to be used in a clean room, a vacuum is applied via the
Soll dagegen der von der Erfindung vorgeschlagen Linearantrieb in einer aggressiven Umgebung verwendet werden, so wird durch den Luftanschluß in dem Zwischenraum zwischen den beiden Dichtbändern 9, 10 ein leichter Überdruck erzeugt, dessen Höhe sich ebenfalls nach den Umständen des Einzelfalls richtet. Dieser Überdruck baut sich an den Stellen ab, an denen ein Eindringen von Stäuben, Spänen oder Dämpfen möglich wäre. Er verhindert daher deren Eindringen in das Innere des Linearantriebs.If, on the other hand, the linear drive proposed by the invention is to be used in an aggressive environment, a slight excess pressure is generated by the air connection in the space between the two sealing
Claims (9)
- A linear drive having a longitudinally slotted cylinder housing (1), in the interior (2) of which a driving member is arranged so as to be drivable in a reciprocating manner and engages through the longitudinal slot (4) with a lateral attachment (7), the longitudinal slot (4) being sealed on its outside by an outer sealing tape (9) which extends over the length of the housing (1) and on its inside by an inner sealing tape (10) which likewise extends over the length of the housing (1), the two sealing tapes (9, 10) being raised from the longitudinal slot (4) in the region of the attachment (7) and each passing through one tunnel-shaped channel in the driving member (8); characterized in that it comprises at least one additional air connexion (13) leading into the space between the two sealing tapes (9, 10) and being connectable to a device for generating and maintaining a pressure which is different from the pressure prevailing outside the cylinder housing (1).
- A linear drive according to Claim 1, characterized in that the additional air connexion (13) is arranged in the region of the end of the cylinder housing (1).
- A linear drive according to Claim 1 or 2, characterized in that two additional air connexions (13) are present.
- A linear drive according to Claim 1, 2 or 3, characterized in that the additional air connexion (13) is arranged in the region of the longitudinal slot (4).
- A linear drive according to one of Claims 1 to 4, characterized in that, in order to use it in a clean room, an underpressure is applied to the additional air connexion (13).
- A linear drive according to one of Claims 1 to 4, characterized in that, in order to use it in a corrosive environment, an overpressure is applied to the additional air connexion
- A method of operating a linear drive according to one of Claims 1 to 6, characterized in that, in order to use the linear drive in a clean room, an underpressure is applied and maintained in the region between the two sealing tapes (9, 10).
- A method of operating a linear drive according to one of Claims 1 to 6, characterized in that, in order to use the linear drive in a corrosive environment, an overpressure is applied and maintained in the region between the two sealing tapes.
- A method of operating a linear drive according to Claim 7 or 8, characterized in that the pressure is constantly maintained, even when the drive member has stopped.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP91108772A EP0515715B1 (en) | 1991-05-29 | 1991-05-29 | Linear actuation |
| DE59106274T DE59106274D1 (en) | 1991-05-29 | 1991-05-29 | Linear actuator. |
| US07/852,653 US5245910A (en) | 1991-05-29 | 1992-03-17 | Rodless cylinder |
| JP4087214A JP2777306B2 (en) | 1991-05-29 | 1992-04-08 | Linear drive device and its operation method |
| HK98100413A HK1001334A1 (en) | 1991-05-29 | 1998-01-19 | Linear actuation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP91108772A EP0515715B1 (en) | 1991-05-29 | 1991-05-29 | Linear actuation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0515715A1 EP0515715A1 (en) | 1992-12-02 |
| EP0515715B1 true EP0515715B1 (en) | 1995-08-16 |
Family
ID=8206780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP91108772A Expired - Lifetime EP0515715B1 (en) | 1991-05-29 | 1991-05-29 | Linear actuation |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5245910A (en) |
| EP (1) | EP0515715B1 (en) |
| JP (1) | JP2777306B2 (en) |
| DE (1) | DE59106274D1 (en) |
| HK (1) | HK1001334A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004047559A1 (en) * | 2004-09-30 | 2006-04-13 | OKIN Gesellschaft für Antriebstechnik mbH | Drive for seat adjusters for hospital beds etc has sealed housing with valve for connecting pressure device for generating excess pressure inside housing by means of gas |
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| DE4413512A1 (en) * | 1994-04-19 | 1995-10-26 | Hygrama Ag | Pressure medium cylinder without piston rod |
| JP3896550B2 (en) * | 1994-11-24 | 2007-03-22 | Ｓｍｃ株式会社 | Linear actuator |
| AT402543B (en) | 1994-11-30 | 1997-06-25 | Hygrama Ag | PISTONLESS PRESSURE CYLINDER |
| TW308628B (en) | 1995-12-27 | 1997-06-21 | Toyowa Kogyo Kk | A rodless power cylinder |
| US5868499A (en) * | 1996-09-06 | 1999-02-09 | Deutsche Star Gmbh | Linear guiding unit |
| JP3177949B2 (en) * | 1997-04-29 | 2001-06-18 | 豊和工業株式会社 | Rodless cylinder |
| SE510854C2 (en) * | 1997-10-29 | 1999-06-28 | Mecman Ab Rexroth | Device on the end of a pressurized fluid cylinder and pressurized fluid cylinder comprising one or two such devices |
| SE511690C2 (en) * | 1998-03-27 | 1999-11-08 | Mecman Ab Rexroth | Holder for sealing tape |
| US5996469A (en) * | 1998-04-07 | 1999-12-07 | Greenco Manufacturing Corporation | Rodless power cylinder |
| JP3546422B2 (en) * | 1999-02-23 | 2004-07-28 | 豊和工業株式会社 | Connection structure between base and drive unit and linear actuator |
| US6857780B2 (en) * | 2002-11-15 | 2005-02-22 | Phd, Inc. | Rodless slide assembly |
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| US3722374A (en) * | 1971-06-14 | 1973-03-27 | R Densmore | Segmented retaining ring assembly |
| US4373427A (en) * | 1980-01-31 | 1983-02-15 | Tol-O-Matic, Inc. | Fluid pressure cylinder |
| ATE25869T1 (en) * | 1983-01-14 | 1987-03-15 | Proma Prod & Marketing Gmbh | PRESSURE MEDIA CYLINDER WITH A LONGITUDINALLY SLOTTED CYLINDER CLOSED AT THE END. |
| DE3514074A1 (en) * | 1985-04-18 | 1986-10-23 | Herion-Werke Kg, 7012 Fellbach | Rodless cylinder |
| DE8511577U1 (en) * | 1985-04-18 | 1985-06-05 | Herion-Werke Kg, 7012 Fellbach | Rodless cylinder |
| DE3520419C2 (en) * | 1985-06-07 | 1987-05-07 | Jagenberg AG, 4000 Düsseldorf | Device for air distribution to a pneumatic tool |
| JPS62266206A (en) * | 1986-05-09 | 1987-11-19 | Ckd Corp | Rodless cylinder |
| DE3807786A1 (en) * | 1987-03-12 | 1988-09-22 | Ckd Corp | PISTONLESS CYLINDER |
| US4891908A (en) * | 1987-03-24 | 1990-01-09 | Aquilina Anthony G | Pneumatic door opener |
| IT1217812B (en) * | 1988-06-08 | 1990-03-30 | Univers S P A | Seal for rodless pneumatic cylinder |
-
1991
- 1991-05-29 EP EP91108772A patent/EP0515715B1/en not_active Expired - Lifetime
- 1991-05-29 DE DE59106274T patent/DE59106274D1/en not_active Expired - Fee Related
-
1992
- 1992-03-17 US US07/852,653 patent/US5245910A/en not_active Expired - Lifetime
- 1992-04-08 JP JP4087214A patent/JP2777306B2/en not_active Expired - Lifetime
-
1998
- 1998-01-19 HK HK98100413A patent/HK1001334A1/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004047559A1 (en) * | 2004-09-30 | 2006-04-13 | OKIN Gesellschaft für Antriebstechnik mbH | Drive for seat adjusters for hospital beds etc has sealed housing with valve for connecting pressure device for generating excess pressure inside housing by means of gas |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0515715A1 (en) | 1992-12-02 |
| US5245910A (en) | 1993-09-21 |
| JPH05106612A (en) | 1993-04-27 |
| HK1001334A1 (en) | 1998-06-12 |
| DE59106274D1 (en) | 1995-09-21 |
| JP2777306B2 (en) | 1998-07-16 |
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