EP1826417B1 - Hydraulic actuator for swing gates or overhead doors with pressure switch - Google Patents
Hydraulic actuator for swing gates or overhead doors with pressure switch Download PDFInfo
- Publication number
- EP1826417B1 EP1826417B1 EP07380042A EP07380042A EP1826417B1 EP 1826417 B1 EP1826417 B1 EP 1826417B1 EP 07380042 A EP07380042 A EP 07380042A EP 07380042 A EP07380042 A EP 07380042A EP 1826417 B1 EP1826417 B1 EP 1826417B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- fluid
- hydraulic
- hydraulic actuator
- conduit
- 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.)
- Not-in-force
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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
- F15B15/18—Combined units comprising both motor and pump
Definitions
- the present invention relates to a hydraulic actuator for swing gates or overhead doors.
- hydraulic units are frequently used for the operating of overhead doors such as that described, for example, in ES 8100441 A1 , which comprises an electric motor, a hydraulic pump powered by said electric motor and a hydraulic distributor that distributes a fluid driven by the pump towards a hydraulic cylinder, said hydraulic cylinder comprising a piston that is displaced by the pressure exerted by the fluid, causing the movement of a rod that acts directly on the door.
- ES 2024105 A6 describes a hydraulic unit for the operating of swing gates that comprises a pump, a distributor, a hydraulic cylinder with a piston that is displaced by the pressure exerted by the fluid, and a drive mechanism of the rack and pinion type that turns the linear movement of the piston into a rotational movement of an shaft connected to an arm which acts directly on the door.
- Said hydraulic units or actuators in the event that the door traps an obstacle during its opening or closing stroke, continue to push the door against said obstacle exerting a pressure that depends on the predetermined rating pressure until the operating time of the hydraulic actuator ends.
- the objective of this invention is to provide a hydraulic actuator for overhead doors or swing gates as defined in the claims.
- the hydraulic actuator incorporates a means for detecting either an increase in the pressure of the fluid above a predetermined rating pressure or, rather, a reduction in the pressure of the fluid below a normal operating pressure, as both situations occur when the door traps an obstacle.
- the inventive hydraulic actuator is made up of a motor that powers a hydraulic pump and a hydraulic distributor that distributes a fluid driven by the hydraulic pump towards a hydraulic cylinder, in whose interior a piston is displaced by the action of the fluid originating from the hydraulic distributor.
- the means for detecting said variations of pressure is generally included in the hydraulic distributor, although it may be connected to another integral element of the hydraulic actuator.
- Said detection means comprises an electric switch and an actuating means which switches said switch on or off when it receives or stops receiving pressure.
- the change in the switch condition is interpreted by a control as an obstacle encountered by the door during its stroke, as a result of which it sends to the hydraulic actuator an instruction to modify its operation.
- Fig.1 shows a hydraulic actuator 1 for overhead doors that comprises a hydraulic pump 3 powered by an electric motor 2, a hydraulic distributor 4 that distributes the fluid driven by the hydraulic pump 3, a hydraulic cylinder 5 in whose interior is displaced a double effect piston 8 driven by the fluid originating from the distributor 4 and a cap 7 of the hydraulic cylinder 5, said hydraulic actuator 1 acting on the overhead door, through a drive mechanism, that may be of the linear type such as a rod 8b, built into the piston 8, that passes through the cap 7 being fixed to the door by a fastening means, or for example, of the rack and pinion type, not included in the figures, which is powered by the piston 8 converting the axial displacement of the piston 8 into a rotational movement of the door shaft.
- a drive mechanism that may be of the linear type such as a rod 8b, built into the piston 8 that passes through the cap 7 being fixed to the door by a fastening means, or for example, of the rack and pinion type, not included in the figures, which is powered by the piston 8
- the hydraulic cylinder 5 comprises a pair of chambers separated by the piston 8, where a first chamber 27 is limited by the piston 8 and the hydraulic distributor 4, and a second chamber 28 is limited by the piston 8 and the cap 7, said second chamber 28 being connected to the hydraulic distributor 4 by an external return conduit 15.
- Figs. 2-8 show the hydraulic distributor 4, which includes a slide 6 fitted into a housing 12 throughout which it is displaced, driven by the fluid originated from the hydraulic pump 3 through a first impulsion conduit 20 and a second impulsion conduit 21.
- the slide 6 delimits in the housing 12, a first cavity 50 connected to the first impulsion conduit 20, a second cavity 51 connected to the second impulsion conduit 21 and an intermediate cavity 52 positioned between both cavities 50,51.
- the hydraulic distributor 4 comprises a primary regulation valve 25 and a secondary regulation valve 26, both set at a specific rating pressure, and which are housed respectively in a first cavity 10 and a second cavity 11 of the hydraulic distributor 4, both cavities 10,11 being connected to the housing 12, respectively, by a primary connection conduit 13 and a secondary connection conduit 14.
- the hydraulic distributor 4 is connected to the first chamber 27 by a primary distribution conduit 24, and to the return conduit 15, connected to the second chamber 28 by a secondary distribution conduit 29, which at the same time, is connected to the housing 12 by the secondary connection conduit 14 of the secondary regulation valve 26.
- the primary regulation valve 25 is connected to the secondary regulation valve 26 by an intermediate conduit 18 and each regulation valve 25,26 comprises respectively a top 40,41, a spring 42,43 and a screw 44,45 with which the predetermined rating pressure is regulated.
- the hydraulic distributor 4 incorporates a means 30 for detecting pressures over the rating pressures of the regulating valves 25,26, which comprises an electric switch 9 fixed to one of the side walls 34 of said hydraulic distributor 4 and with a contact member 9b oriented towards the interior of said hydraulic distributor 4, a derivation conduit 33 connected directly to the cavity 10 and an actuating means 31, such as a ball, that operates said contact member 9b, said ball being housed and guided in a cylindrical cavity 32 positioned between the derivation conduit 33 and the electric switch 9.
- a means 30 for detecting pressures over the rating pressures of the regulating valves 25,26 which comprises an electric switch 9 fixed to one of the side walls 34 of said hydraulic distributor 4 and with a contact member 9b oriented towards the interior of said hydraulic distributor 4, a derivation conduit 33 connected directly to the cavity 10 and an actuating means 31, such as a ball, that operates said contact member 9b, said ball being housed and guided in a cylindrical cavity 32 positioned between the derivation conduit 33 and the electric switch 9.
- Fig. 3 shows the hydraulic distributor 4 comprised in the hydraulic actuator 1 in the door closing condition, during which time the motor 2 powers the hydraulic pump 3 driving the fluid through a first impulsion conduit 20 of the hydraulic distributor 4, so that the slide 6 is displaced in the housing 12 to the left, according to Fig. 3 , enabling the passage of fluid to the first chamber 27 through the primary distribution conduit 24 and closing the passage of said fluid towards the secondary distribution conduit 29.
- the piston 8 is displaced due to the pressure exerted by the fluid in the first chamber 27, towards its end of stroke where the door is completely closed. During this displacement, the fluid comprised in the second chamber 28 is evacuated towards the hydraulic distributor 4 through the return conduit 15 towards the intermediate chamber 52 of the housing 12, being sucked by the hydraulic pump 3.
- Fig.4 shows the hydraulic distributor 4 in a situation in which the door encounters an obstacle during its closing stroke.
- the motor 2 continues to operate, driving fluid through the first impulsion conduit 20 without the piston 8 being displaced, as a result of which the pressure of the fluid in the hydraulic distributor 4 and the first chamber 27 increases until the rating pressure of the primary regulation valve 25 is exceeded.
- the primary top 40 of said regulation valve 25 is displaced against the primary spring 42, enabling the passage of fluid towards the derivation conduit 33.
- the pressure of said fluid displaces the ball 31 towards the contact member of the switch 9b activating it, so that it sends a signal to a control panel, not shown, so that the motor 2 give the command to reverse the operation.
- Fig.5 shows the hydraulic distributor 4 in the door opening condition, in which condition the motor 2 powers the hydraulic pump 3 in an anti-clockwise direction, driving the fluid through the second impulsion conduit 21, which displaces the slide 6 in the housing 12 towards the right side, according to Fig. 5 , so that it enables the passage of fluid to the second chamber 28 through the secondary distribution chamber 29 and the return conduit 15 and closes the passage of said fluid towards the primary distribution conduit 24.
- the piston 8 is displaced, by the effect of the pressure exerted in the second chamber 28, towards the hydraulic distributor 4 until its end of stroke, where the door is completely open. During this displacement of the piston 8, the fluid comprised in the first chamber 27 flows, through the primary distribution conduit 24 towards the intermediate chamber 52 of the housing 12, it being sucked by the hydraulic pump 3.
- Fig.6 shows the hydraulic distributor 4 in a situation in which the door encounters an obstacle in its closing stroke.
- the door traps the object during its opening stroke, it continues to drive fluid through the secondary distribution conduit 29 towards the second chamber 28, without the piston 8 being displaced, as a result of which the pressure of the fluid in the hydraulic distributor 4 and the second chamber 28 increases until the rating pressure of the secondary regulation valve 26 is exceeded.
- the secondary top 41 is displaced against the secondary spring 43, enabling the passage of fluid towards the derivation conduit 33, through the intermediate conduit 18.
- the pressure of said fluid displaces the ball 31 towards the contact member of the switch 9b activating it, so that it sends a signal to a control panel, not shown in the figures, to act as programmed.
- the detection means 30 detects pressures below a normal operating pressure of the fluid comprised in the derivation conduit 33, which is connected directly to the intermediate cavity 52 of the housing 12.
- the electric switch 9 at the same time, is fixed onto a base of the hydraulic distributor 4 opposite the base where the regulation valves 25,26 are housed and the actuating means 31 is positioned between the derivation conduit 33 and said electric switch 9.
Abstract
Description
- The present invention relates to a hydraulic actuator for swing gates or overhead doors.
- At present, hydraulic units are frequently used for the operating of overhead doors such as that described, for example, in
ES 8100441 A1 -
ES 2024105 A6 - A similar actuator is also disclosed in
US 6267432 B1 . - Said hydraulic units or actuators, in the event that the door traps an obstacle during its opening or closing stroke, continue to push the door against said obstacle exerting a pressure that depends on the predetermined rating pressure until the operating time of the hydraulic actuator ends.
- The objective of this invention is to provide a hydraulic actuator for overhead doors or swing gates as defined in the claims.
- It is an object of this invention to provide a hydraulic actuator for overhead doors or swing gates that, in the event of encountering an obstacle during the opening or closing stroke of the door, detects the presence of said obstacle so that it is possible to remove the trapped obstacle quickly. To achieve this, the hydraulic actuator incorporates a means for detecting either an increase in the pressure of the fluid above a predetermined rating pressure or, rather, a reduction in the pressure of the fluid below a normal operating pressure, as both situations occur when the door traps an obstacle.
- The inventive hydraulic actuator is made up of a motor that powers a hydraulic pump and a hydraulic distributor that distributes a fluid driven by the hydraulic pump towards a hydraulic cylinder, in whose interior a piston is displaced by the action of the fluid originating from the hydraulic distributor. The means for detecting said variations of pressure is generally included in the hydraulic distributor, although it may be connected to another integral element of the hydraulic actuator. Said detection means comprises an electric switch and an actuating means which switches said switch on or off when it receives or stops receiving pressure. The change in the switch condition is interpreted by a control as an obstacle encountered by the door during its stroke, as a result of which it sends to the hydraulic actuator an instruction to modify its operation.
-
-
Fig.1 is a joint view of a first embodiment of the invention. -
Fig.2 is a front view of the hydraulic distributor shown inFig.1 . -
Fig.3 is a sectional view of the hydraulic distributor shown inFig.1 with the doors in a closed position. -
Fig.4 is a sectional view of the hydraulic distributor shown inFig.3 in the event of the door encountering an obstacle during its closing stroke. -
Fig.5 is a sectional view of the hydraulic distributor shown inFig.1 with the doors in an open position. -
Fig.6 is a sectional view of the hydraulic distributor shown inFig.5 in the event of the door encountering an obstacle during its opening stroke. -
Fig.7 is a sectional view of the hydraulic distributor in accordance with the second embodiment of the invention, in the event of the door encountering an obstacle during its opening stroke. -
Fig.8 is a sectional view of the hydraulic distributor shown inFig.7 in the event of the door encountering an obstacle during its closing stroke. -
Fig.1 shows ahydraulic actuator 1 for overhead doors that comprises ahydraulic pump 3 powered by anelectric motor 2, ahydraulic distributor 4 that distributes the fluid driven by thehydraulic pump 3, ahydraulic cylinder 5 in whose interior is displaced a double effect piston 8 driven by the fluid originating from thedistributor 4 and a cap 7 of thehydraulic cylinder 5, saidhydraulic actuator 1 acting on the overhead door, through a drive mechanism, that may be of the linear type such as a rod 8b, built into the piston 8, that passes through the cap 7 being fixed to the door by a fastening means, or for example, of the rack and pinion type, not included in the figures, which is powered by the piston 8 converting the axial displacement of the piston 8 into a rotational movement of the door shaft. - The
hydraulic cylinder 5 comprises a pair of chambers separated by the piston 8, where afirst chamber 27 is limited by the piston 8 and thehydraulic distributor 4, and asecond chamber 28 is limited by the piston 8 and the cap 7, saidsecond chamber 28 being connected to thehydraulic distributor 4 by anexternal return conduit 15. -
Figs. 2-8 show thehydraulic distributor 4, which includes aslide 6 fitted into ahousing 12 throughout which it is displaced, driven by the fluid originated from thehydraulic pump 3 through afirst impulsion conduit 20 and asecond impulsion conduit 21. Theslide 6 delimits in thehousing 12, afirst cavity 50 connected to thefirst impulsion conduit 20, a second cavity 51 connected to thesecond impulsion conduit 21 and anintermediate cavity 52 positioned between bothcavities 50,51. - The
hydraulic distributor 4 comprises aprimary regulation valve 25 and asecondary regulation valve 26, both set at a specific rating pressure, and which are housed respectively in afirst cavity 10 and asecond cavity 11 of thehydraulic distributor 4, bothcavities housing 12, respectively, by aprimary connection conduit 13 and asecondary connection conduit 14. - The
hydraulic distributor 4 is connected to thefirst chamber 27 by aprimary distribution conduit 24, and to thereturn conduit 15, connected to thesecond chamber 28 by asecondary distribution conduit 29, which at the same time, is connected to thehousing 12 by thesecondary connection conduit 14 of thesecondary regulation valve 26. - The
primary regulation valve 25 is connected to thesecondary regulation valve 26 by anintermediate conduit 18 and eachregulation valve top spring 42,43 and ascrew 44,45 with which the predetermined rating pressure is regulated. - In a first embodiment of the invention, shown in
Figs. 3-6 , thehydraulic distributor 4 incorporates ameans 30 for detecting pressures over the rating pressures of the regulatingvalves electric switch 9 fixed to one of theside walls 34 of saidhydraulic distributor 4 and with acontact member 9b oriented towards the interior of saidhydraulic distributor 4, aderivation conduit 33 connected directly to thecavity 10 and an actuating means 31, such as a ball, that operates saidcontact member 9b, said ball being housed and guided in acylindrical cavity 32 positioned between thederivation conduit 33 and theelectric switch 9. -
Fig. 3 shows thehydraulic distributor 4 comprised in thehydraulic actuator 1 in the door closing condition, during which time themotor 2 powers thehydraulic pump 3 driving the fluid through a first impulsion conduit 20 of thehydraulic distributor 4, so that theslide 6 is displaced in thehousing 12 to the left, according toFig. 3 , enabling the passage of fluid to thefirst chamber 27 through theprimary distribution conduit 24 and closing the passage of said fluid towards thesecondary distribution conduit 29. The piston 8 is displaced due to the pressure exerted by the fluid in thefirst chamber 27, towards its end of stroke where the door is completely closed. During this displacement, the fluid comprised in thesecond chamber 28 is evacuated towards thehydraulic distributor 4 through thereturn conduit 15 towards theintermediate chamber 52 of thehousing 12, being sucked by thehydraulic pump 3. -
Fig.4 shows thehydraulic distributor 4 in a situation in which the door encounters an obstacle during its closing stroke. When the door traps the object, themotor 2 continues to operate, driving fluid through the first impulsion conduit 20 without the piston 8 being displaced, as a result of which the pressure of the fluid in thehydraulic distributor 4 and thefirst chamber 27 increases until the rating pressure of theprimary regulation valve 25 is exceeded. At this point, theprimary top 40 of saidregulation valve 25 is displaced against theprimary spring 42, enabling the passage of fluid towards thederivation conduit 33. The pressure of said fluid displaces theball 31 towards the contact member of theswitch 9b activating it, so that it sends a signal to a control panel, not shown, so that themotor 2 give the command to reverse the operation. -
Fig.5 shows thehydraulic distributor 4 in the door opening condition, in which condition themotor 2 powers thehydraulic pump 3 in an anti-clockwise direction, driving the fluid through thesecond impulsion conduit 21, which displaces theslide 6 in thehousing 12 towards the right side, according toFig. 5 , so that it enables the passage of fluid to thesecond chamber 28 through thesecondary distribution chamber 29 and thereturn conduit 15 and closes the passage of said fluid towards theprimary distribution conduit 24. The piston 8 is displaced, by the effect of the pressure exerted in thesecond chamber 28, towards thehydraulic distributor 4 until its end of stroke, where the door is completely open. During this displacement of the piston 8, the fluid comprised in thefirst chamber 27 flows, through the primary distribution conduit 24 towards theintermediate chamber 52 of thehousing 12, it being sucked by thehydraulic pump 3. -
Fig.6 shows thehydraulic distributor 4 in a situation in which the door encounters an obstacle in its closing stroke. When the door traps the object during its opening stroke, it continues to drive fluid through the secondary distribution conduit 29 towards thesecond chamber 28, without the piston 8 being displaced, as a result of which the pressure of the fluid in thehydraulic distributor 4 and thesecond chamber 28 increases until the rating pressure of thesecondary regulation valve 26 is exceeded. At this point, thesecondary top 41 is displaced against the secondary spring 43, enabling the passage of fluid towards thederivation conduit 33, through theintermediate conduit 18. The pressure of said fluid displaces theball 31 towards the contact member of theswitch 9b activating it, so that it sends a signal to a control panel, not shown in the figures, to act as programmed. - In a second embodiment of the invention, shown in
Figs.7-8 , the detection means 30 detects pressures below a normal operating pressure of the fluid comprised in thederivation conduit 33, which is connected directly to theintermediate cavity 52 of thehousing 12. Theelectric switch 9, at the same time, is fixed onto a base of thehydraulic distributor 4 opposite the base where theregulation valves actuating means 31 is positioned between thederivation conduit 33 and saidelectric switch 9. In the event that the door traps the object in its closing stroke (seeFig.7 ), the pressure of the fluid in thesecond chamber 28 falls below the normal operating pressure, and in contrast, when the door traps the object in its opening stroke (seeFig.8 ) it is the pressure of the fluid in thefirst chamber 27 that falls below the normal operating pressure. In both cases, the pressure of the fluid housed in thederivation conduit 33 falls, causing theball 31 to be displaced, moving away from the contact member of theswitch 9b and deactivating saidswitch 9, so that it sends a signal to the control panel, not shown in the figures, to act as programmed.
Claims (6)
- Hydraulic actuator for swing gates or overhead doors that comprises• an electric motor (2),• a hydraulic pump (3) powered by the electric motor (2),• an hydraulic cylinder (5) comprising a piston (8) that is displaced in the interior of said hydraulic cylinder (5) and two chambers (27,28) separated by said piston (8), and• a hydraulic distributor (4) that distributes a fluid originating from the hydraulic pump (3) to the hydraulic cylinder (5), the piston (8) being displaced by the action of said fluid causing an opening or closing movement of the swing or pivoted door,characterised in that the hydraulic actuator (1) comprises a detection means (30) for detecting an obstacle during the opening or closing stroke of the door through the detection of an increase in pressure over a rating pressure or of a decrease in pressure below a normal operating pressure, of the pressure of the fluid comprised in one of the chambers (27,28), including said detection means (30) an electric switch (9) and an actuating means (31) that is displaced towards the electric switch (9) by the pressure of the fluid, activating said electric switch (9) when said increase in pressure of the fluid occurs or that is moved away from said electric switch (9) by the pressure falling, deactivating said electric switch (9) when said decrease in the pressure of the fluid occurs.
- Hydraulic actuator for swing gates or overhead doors according to claim 1, wherein the hydraulic conduit (3) includes a slide (6) fitted into a housing (12) throughout which is displaced, driven by the fluid from the hydraulic pump (3), said slide (6) delimiting in the housing (12) at least a pair of cavities (50,51), and the hydraulic actuator (1) comprises a derivation conduit (33) connected to the housing (12), that enables the passage of fluid towards the actuating means (31).
- Hydraulic actuator for swing gates or overhead doors according to claim 2, wherein the hydraulic distributor (4) comprises regulation valves (25,26) set so that they open at the rating pressure of the fluid and which are housed in cavities (10,11) of the hydraulic distributor (4) said cavities (10, 11) being connected to each other through an intermediate conduit (18) and at the same time connected to the housing (12), and the derivation conduit (33) is connected directly to one of said cavities (10,11), the regulation valve (25,26) enabling the passage of a fluid whose pressure is higher than the rating pressure of said regulation valves (25,26) towards the actuating means (31) through said derivation conduit (33), said actuating means (31) activating the electric switch (9) which is fixed to said hydraulic distributor (4).
- Hydraulic actuator for swing gates or overhead doors according to claim 2, wherein the derivation conduit (33) is directly connected to an intermediate cavity (52), positioned between both cavities (50,51), delimited by the slide (6) in the housing (12), so that when the pressure of the fluid housed in said derivation conduit (33) falls below a predetermined normal operating pressure, the actuating means (31) switches off the switch (9).
- Hydraulic actuator for swing gates or overhead doors according to any of the preceding claims, wherein the actuating means (31) comprises a ball, guided in a cavity (32), where it is displaced longitudinally by the effect of the pressure of the fluid, switching the switch (9) on or off, said cavity (32) being positioned between the derivation conduit (33) and the switch (9).
- Hydraulic actuator for swing gates or overhead doors according to claim 5, wherein the ball (31) has a greater diameter than the derivation conduit (33).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES200600432A ES2319243B1 (en) | 2006-02-23 | 2006-02-23 | HYDRAULIC ACTUATOR FOR SWING OR DOUBLE DOORS WITH PRESSURE VARIATION DETECTOR. |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1826417A2 EP1826417A2 (en) | 2007-08-29 |
EP1826417A3 EP1826417A3 (en) | 2009-11-18 |
EP1826417B1 true EP1826417B1 (en) | 2012-04-11 |
Family
ID=38006933
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07380042A Not-in-force EP1826417B1 (en) | 2006-02-23 | 2007-02-20 | Hydraulic actuator for swing gates or overhead doors with pressure switch |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1826417B1 (en) |
AT (1) | ATE553301T1 (en) |
ES (2) | ES2319243B1 (en) |
MX (1) | MX2007002065A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101324924B1 (en) * | 2012-01-30 | 2013-11-01 | 이종희 | Fixed delivery type hydraulic pump |
EP4137704A1 (en) * | 2020-12-23 | 2023-02-22 | Ican Company Ltd. | Electric hydraulic actuator |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2918795A (en) * | 1955-09-06 | 1959-12-29 | Ramsey Corp | Electro-hydraulic actuating cylinder |
US3084513A (en) * | 1960-03-08 | 1963-04-09 | Gen Controls Co | Electrohydraulic actuator |
US3698187A (en) * | 1971-01-28 | 1972-10-17 | Henry H Logan | Actuator |
ES8100441A1 (en) | 1979-05-16 | 1980-11-01 | Matias Marques Sanchez | Autonomous hydraulic cylinder perfected with double effect. (Machine-translation by Google Translate, not legally binding) |
IT1220997B (en) * | 1984-09-25 | 1990-06-21 | Fadini Meccanica | DEVICE FOR THE END OF STROKE BRAKE OF HYDRAULIC JACKS, IN PARTICULAR FOR THE OPENING AND CLOSING OF GATES |
ES2024105A6 (en) * | 1990-03-29 | 1992-02-16 | Subira Bonet Antonio | Hydraulic unit, especially for actuating hinged (pivoting) doors |
AT405384B (en) * | 1997-11-12 | 1999-07-26 | Hoerbiger Gmbh | ARRANGEMENT AND METHOD FOR HYDRAULICALLY ACTUATING MOVABLE PARTS |
US6282893B1 (en) * | 1999-08-19 | 2001-09-04 | Delaware Capital Formation, Inc. | Self-contained actuator |
DE20201058U1 (en) * | 2002-01-25 | 2002-04-18 | Festo Ag & Co | pneumatic drive |
-
2006
- 2006-02-23 ES ES200600432A patent/ES2319243B1/en not_active Expired - Fee Related
-
2007
- 2007-02-20 AT AT07380042T patent/ATE553301T1/en active
- 2007-02-20 ES ES07380042T patent/ES2383914T3/en active Active
- 2007-02-20 EP EP07380042A patent/EP1826417B1/en not_active Not-in-force
- 2007-02-20 MX MX2007002065A patent/MX2007002065A/en active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
EP1826417A3 (en) | 2009-11-18 |
EP1826417A2 (en) | 2007-08-29 |
MX2007002065A (en) | 2008-11-18 |
ATE553301T1 (en) | 2012-04-15 |
ES2383914T3 (en) | 2012-06-27 |
ES2319243A1 (en) | 2009-05-05 |
ES2319243B1 (en) | 2010-02-02 |
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