US20060037518A1 - Power-operated scissor lift table - Google Patents

Power-operated scissor lift table Download PDF

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Publication number
US20060037518A1
US20060037518A1 US10/919,639 US91963904A US2006037518A1 US 20060037518 A1 US20060037518 A1 US 20060037518A1 US 91963904 A US91963904 A US 91963904A US 2006037518 A1 US2006037518 A1 US 2006037518A1
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US
United States
Prior art keywords
power
shaft
motor
scissor
clutch
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.)
Abandoned
Application number
US10/919,639
Inventor
Adelardo Lopez Alba
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Transportes Continuos Interiores SA
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Transportes Continuos Interiores SA
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Priority to US10/919,639 priority Critical patent/US20060037518A1/en
Assigned to TRANSPORTES CONTINUOS INTERIORES, S.A. reassignment TRANSPORTES CONTINUOS INTERIORES, S.A. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LOPEZ ALBA, ADELARDO
Publication of US20060037518A1 publication Critical patent/US20060037518A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
    • B66F7/065—Scissor linkages, i.e. X-configuration
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B9/00—Tables with tops of variable height
    • A47B9/16—Tables with tops of variable height with means for, or adapted for, inclining the legs of the table for varying the height of the top, e.g. with adjustable cross legs

Definitions

  • the present invention refers to a lift table, i.e. a table whose platform or tabletop is susceptible to adopting different positions in height with the collaboration of a scissor-type mechanism, such as those used in repair shops, warehouses, and the like.
  • the object of the invention is to achieve a table which, in addition to performing its function as such lift element, provides maximum functional assurances against a possible failure in its drive mechanisms, and in parallel, provides great operating ease from the maintenance point of view.
  • Lift tables are known with a scissor-type lift system, in which the arms of the scissor are assembled with rotational possibility with regard to the table base and the tabletop at one of their ends, whereas at the other end they are susceptible to moving on guides operatively arranged in said elements, such that the scissor is susceptible to being folded in a practically horizontal and lower position corresponding to the position of the lower limit of the tabletop, and being extended from this position until reaching maximum height for said tabletop.
  • lift tables usually incorporate one or more conveniently power-operated spindles.
  • European patent EP 0724540 in which a lift table with a scissor-like lift system is disclosed, in which a motor acts by means of a threaded spindle on several pivoting connecting rods in turn acting on the scissor arms, causing the table to lift or lower.
  • Said geared motor is located on the imaginary longitudinal axis of the table and the belts are symmetrically located at both sides of said axis.
  • the table incorporates two geared motors coupled to a common shaft through respective clutches, such that under normal conditions, it is one of these geared motors that is operative and clutched to said common shaft, whereas the other one is inoperative and declutched, while due to a possible failure in the operative motor, the declutching of the latter and the automatic clutching and running of the second motor which operatively replaces the first one occurs automatically.
  • said geared motors are located in side areas of the table, outside of the structure and tabletop thereof, which implies very easy access thereto in maintenance works.
  • FIG. 1 schematically shows a side elevational view of a power-operated scissor lift table carried out according to the object of the present invention.
  • FIG. 2 shows an upper plan view of the table of the previous figure, lacking its tabletop, to show its structure more clearly.
  • FIG. 3 finally shows a profile view of the same table.
  • the lift table proposed by the invention comprises scissor arms ( 1 - 2 ) hinge-assembled on an intermediate pivot shaft ( 3 ), these arms ( 1 ) and ( 2 ) being collapsible at on of their ends with regard to the table base ( 4 ) and the tabletop ( 5 ) through the respective pivot shafts ( 6 ) and ( 7 ), whereas at their other end said arms ( 1 ) and ( 2 ) are finished off in rolling elements ( 8 ) and ( 9 ), sliding on the guides ( 10 ) and ( 11 ) operatively arranged on the base ( 4 ) and the tabletop ( 5 ).
  • the wrap sheaves ( 17 - 18 ) of the belts ( 14 ) and ( 15 ) are keyed to a common shaft ( 19 ), to which respective geared motor groups ( 20 - 20 ′) are coupled at the same time at their ends, which are located outside of the frame of the table, as is observed in any of FIGS. 2 and 3 , with the special particularity that said geared motors ( 20 - 20 ′) are connected to the common shaft ( 19 ) through respective clutches ( 21 - 21 ′) which allow the mechanical connection to/disconnection from said shaft.
  • An electronic control circuit of said geared motors makes one of said motors ( 20 ) exclusively operate normally, and that in turn it is kept clutched to the shaft ( 19 ), whereas the other motor ( 20 ′) is disconnected and inoperative.
  • the electronic circuit interrupts the power supply of the motor ( 20 ) operating until that moment, causes the declutching thereof from the shaft ( 19 ) and simultaneously establishes the power supply for the other motor ( 20 ′) and its clutching to the shaft ( 19 ), therefore the functioning capacity of the table is not interrupted despite the failure which has occurred.
  • the out-of-service motor ( 20 ) can easily be removed for its repair or replacement.
  • Another feature which this table can have is that of using the two motors ( 20 and 20 ′) so that they operate in a unitary or redundant manner, without clutches, and with a manual mechanism for their coupling/decoupling, for example on the transmission chains.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

A power-operated scissor table, provided with a base (4) and an upper platform or tabletop (5) connected by means of a scissor-type mechanism (1-2) actuated by means of a pair of thrust shafts (12-13) susceptible to approaching one another or moving away from one another with the collaboration of a pair of belts (14) and (15), wrapping around said shafts, which are fixed to the structure of the table at one of their ends through tension members and are fixed at their other end to respective wrap sheaves (17) and (18) assembled on a common shaft (19), the invention consists of coupling to the ends of said shaft (19) respective geared motors (20-20′), assisted by respective clutches (21-21′), such that one of said motors is operative while the other one is in a standby situation, and such that with the collaboration of an electronic circuit, when the operative motor undergoes a failure, said motor remains out of service and is declutched from the shaft (19), making the other motor automatically clutch said shaft and passing to an operative situation, keeping the functioning capacity of the table uninterrupted in spite of the failure it has undergone.

Description

    OBJECT OF THE INVENTION
  • The present invention refers to a lift table, i.e. a table whose platform or tabletop is susceptible to adopting different positions in height with the collaboration of a scissor-type mechanism, such as those used in repair shops, warehouses, and the like.
  • The object of the invention is to achieve a table which, in addition to performing its function as such lift element, provides maximum functional assurances against a possible failure in its drive mechanisms, and in parallel, provides great operating ease from the maintenance point of view.
    • BACKGROUND OF THE INVENTION
  • Lift tables are known with a scissor-type lift system, in which the arms of the scissor are assembled with rotational possibility with regard to the table base and the tabletop at one of their ends, whereas at the other end they are susceptible to moving on guides operatively arranged in said elements, such that the scissor is susceptible to being folded in a practically horizontal and lower position corresponding to the position of the lower limit of the tabletop, and being extended from this position until reaching maximum height for said tabletop.
  • To carry out the actuation of said arms of the scissor, lift tables usually incorporate one or more conveniently power-operated spindles. In this sense it is worth mentioning European patent EP 0724540, in which a lift table with a scissor-like lift system is disclosed, in which a motor acts by means of a threaded spindle on several pivoting connecting rods in turn acting on the scissor arms, causing the table to lift or lower.
  • Said spindles, due to their nature and functionality, require a relatively costly maintenance, which makes them unadvisable.
  • In trying to avoid this drawback, the applicant is the holder of European patent EP 1342429, in which a scissor lift table is disclosed which, starting from the basic structure of a standard scissor table, focuses its features on the use, as a transmission means between the drive motor and the scissor arms, consisting of several belts fixed at one of their ends by the anti-rotation support. assembled on the geared motor, whereas at their other end they are fixed to a thrust shaft, acting on the scissor, in turn acting, through its intermediate area, on a second thrust shaft which they wrap around.
  • Said geared motor is located on the imaginary longitudinal axis of the table and the belts are symmetrically located at both sides of said axis.
  • This solution, perfectly valid from the theoretical point of view, has drawbacks in practice which are mainly focused on two aspects:
      • A possible failure in the geared motor or in one of the transmission belts functionally renders the table useless.
      • The location of the geared motor under the tabletop, specifically in correspondence with the longitudinal shaft thereof, as previously commented, makes access to said motor in maintenance tasks considerably difficult, obliging in such circumstances that the tabletop is completely lifted, which is sometimes difficult to achieve.
    DESCRIPTION OF THE INVENTION
  • The table proposed by the invention, starting from the idea of using belts as transmission elements between the drive means and the scissor, acting on the previously mentioned thrust shafts, solves the drawbacks set forth previously in the two commented aspects in a completely satisfactory manner.
  • To that end, more specifically and according to one of the features of the invention, the table incorporates two geared motors coupled to a common shaft through respective clutches, such that under normal conditions, it is one of these geared motors that is operative and clutched to said common shaft, whereas the other one is inoperative and declutched, while due to a possible failure in the operative motor, the declutching of the latter and the automatic clutching and running of the second motor which operatively replaces the first one occurs automatically.
  • It is thus assured that the operation of the table is continuous, since it is rather unlikely, practically impossible, for the simultaneous failure of the two motors to occur in practice, such that the broken-down motor can be repaired or replaced while the other one is operating.
  • According to another one of the features of the invention, said geared motors are located in side areas of the table, outside of the structure and tabletop thereof, which implies very easy access thereto in maintenance works.
    • DESCRIPTION OF THE DRAWINGS
  • To complement the description being made and for the purpose of helping to better understand the features of the invention, according to a preferred embodiment example thereof, a set of drawings is attached as an integral part of said description, in which the following has been shown with an illustrative and non-limiting character:
  • FIG. 1 schematically shows a side elevational view of a power-operated scissor lift table carried out according to the object of the present invention.
  • FIG. 2 shows an upper plan view of the table of the previous figure, lacking its tabletop, to show its structure more clearly.
  • FIG. 3 finally shows a profile view of the same table.
    • PREFERRED EMBODIMENT OF THE INVENTION
  • In view of described figures, it can be observed how the lift table proposed by the invention comprises scissor arms (1-2) hinge-assembled on an intermediate pivot shaft (3), these arms (1) and (2) being collapsible at on of their ends with regard to the table base (4) and the tabletop (5) through the respective pivot shafts (6) and (7), whereas at their other end said arms (1) and (2) are finished off in rolling elements (8) and (9), sliding on the guides (10) and (11) operatively arranged on the base (4) and the tabletop (5).
  • Acting on the opposite sides of the scissor arms (1) and (2) are two transverse thrust shafts (12) and (13), parallel to the rotating shaft (3) of the scissor arms, and which cause the hinging of the scissor as they approach one another for the upward movement of the tabletop (5) and vice versa, said thrust shafts (12) and (13) being connected by means of a pair of side belts (14) and (15) fixed at one of their ends, with the collaboration of respective tension members (16), to one of said shafts, and which, after wrapping around both thrust shafts (12) and (13), are directed towards respective conveniently power-operated wrap sheaves.
  • However, from this basic and standard structure, and according to the invention, the wrap sheaves (17-18) of the belts (14) and (15) are keyed to a common shaft (19), to which respective geared motor groups (20-20′) are coupled at the same time at their ends, which are located outside of the frame of the table, as is observed in any of FIGS. 2 and 3, with the special particularity that said geared motors (20-20′) are connected to the common shaft (19) through respective clutches (21-21′) which allow the mechanical connection to/disconnection from said shaft.
  • An electronic control circuit of said geared motors, not shown in the drawings because it can be of any standard type, makes one of said motors (20) exclusively operate normally, and that in turn it is kept clutched to the shaft (19), whereas the other motor (20′) is disconnected and inoperative.
  • Due to a possible failure in the operating drive group detected by any suitable sensor, the electronic circuit interrupts the power supply of the motor (20) operating until that moment, causes the declutching thereof from the shaft (19) and simultaneously establishes the power supply for the other motor (20′) and its clutching to the shaft (19), therefore the functioning capacity of the table is not interrupted despite the failure which has occurred.
  • Due to its easy and direct accessibility, the out-of-service motor (20) can easily be removed for its repair or replacement.
  • Another feature which this table can have is that of using the two motors (20 and 20′) so that they operate in a unitary or redundant manner, without clutches, and with a manual mechanism for their coupling/decoupling, for example on the transmission chains.
  • Having sufficiently described the nature of the invention as well as a preferred embodiment example, it is stated for all suitable purposes that the materials, shape, size and arrangement of the described elements can be susceptible to modification, as long as this implies no alteration of the essential features of the invention, which are claimed below.

Claims (3)

1.- A power-operated scissor lift table, of the type of those incorporating a lower base and an upper platform or tabletop, connected to one another by means of a scissor-type mechanism on which two thrust shafts act, which thrust shafts are enveloped by a pair of belts fixed at one of their ends to the structure of the table and to conveniently power-operated wrap sheaves at their other end, characterized in that coupled at their ends to the rotation axis (19) for said wrap sheaves (17) and (18) of the belts (14) and (15) are the respective geared motors (20-20′), assisted by also respective clutches (21-21′), these elements being controlled by an electronic circuit which determines that under normal working conditions, one of the geared motors (20) is supplied and its corresponding clutch (21) is in a clutched position, whereas the other geared motor (20′) is out of service and decoupled from the shaft (19) through its clutch (21′), while due to a possible failure in the operating motor (20), said circuit cancels the power supply thereof, causes the declutching of its clutch (21) and simultaneously causes the power supply of the other geared motor (20′) and the actuation of its clutch (21′) for its coupling to the drive shaft (19) of the sheaves (17) and (18).
2.- A power-operated scissor lift table according to claim 1, characterized in that said geared motors (20-20′), with their corresponding clutches (21-21′), are arranged outside of the structure of the table in a freely and directly accessible position for facilitating their maintenance.
3.- A power-operated scissor lift table according to claim 1 characterized in that the clutches can be replaced with manual coupling mechanisms.
US10/919,639 2004-08-17 2004-08-17 Power-operated scissor lift table Abandoned US20060037518A1 (en)

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Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2019076A1 (en) * 2007-07-27 2009-01-28 Ludwig Göcke Power-operated scissor table
US20090300844A1 (en) * 2006-02-27 2009-12-10 Brian Taylor Surgical table
US20110064551A1 (en) * 2005-01-13 2011-03-17 Pogue Richard W Pull and lift system for transporting roofing materials
US20110139548A1 (en) * 2009-12-16 2011-06-16 Herkules Equipment Corporation Belt-driven transportation system
US20110139549A1 (en) * 2009-12-16 2011-06-16 Herkules Equipment Corporation Belt-driven transportation system
USD668425S1 (en) 2011-03-29 2012-10-02 Boomerang Systems, Inc. Scissor assembly for a scissor lift
WO2012135078A2 (en) * 2011-03-25 2012-10-04 Boomerang Systems, Inc. Scissor lift
US20130256611A1 (en) * 2012-03-27 2013-10-03 Rofa Industrial Automation Ag Scissor lift table
US20140014886A1 (en) * 2012-07-13 2014-01-16 Rofa Industrial Automation Ag Lift table control
US8733508B2 (en) 2010-04-02 2014-05-27 Herkules Equipment Corporation Scissor lift assembly
US20150289641A1 (en) * 2014-04-14 2015-10-15 Mustafa A. Ergun Height adjustable desktop work surface
US9377238B2 (en) * 2013-03-14 2016-06-28 Electrolux Home Products, Inc. Refrigerator with a scissor-type lift mechanism
US9422142B2 (en) 2013-08-01 2016-08-23 Herkules Equipment Corporation Scissor-type lift assembly
US20180070732A1 (en) * 2015-09-01 2018-03-15 Ramakrishna Pillay Micro Lift-OAST Device
US9961991B1 (en) * 2016-12-22 2018-05-08 Ying Liang Health Tech. Co., Ltd. Desktop liftable platform
JP2018080029A (en) * 2016-11-17 2018-05-24 アルインコ株式会社 Lift device
US10159336B2 (en) 2016-09-23 2018-12-25 Varidesk, Llc Electrically-lifted computer desk and office desk thereof
US10465970B1 (en) * 2018-06-11 2019-11-05 Lg Electronics Inc. Refrigerator
US10542817B2 (en) 2015-09-24 2020-01-28 Ergotron, Inc. Height adjustable device
US10602840B2 (en) 2015-10-08 2020-03-31 Ergotron, Inc. Height adjustable table
US10986918B2 (en) * 2017-12-22 2021-04-27 Loctek Inc. Lifting table
US11019920B2 (en) 2016-09-23 2021-06-01 Varidesk, Llc Electrically-lifted computer desk and office desk thereof
WO2023052770A1 (en) * 2021-09-30 2023-04-06 Accora Limited Bed lifting mechanism
US20230304729A1 (en) * 2019-11-20 2023-09-28 Lg Electronics Inc. Refrigerator

Citations (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1991255A (en) * 1932-02-29 1935-02-12 Martin Louis Joseph Henri Elevator for any applications
US3237921A (en) * 1963-08-13 1966-03-01 Jarke Corp Power operated platform
US3628621A (en) * 1970-01-12 1971-12-21 William H Lee Drive and control system for electric automobiles
US3757912A (en) * 1972-06-07 1973-09-11 Philadelphia Gear Corp Load equalizing clutch controls
US3785462A (en) * 1972-06-23 1974-01-15 Applied Radiation Corp Scissor lift and drive mechanism therefor
US4078269A (en) * 1975-08-29 1978-03-14 Firma Binz & Co. Litter frame with supporting platform which can be raised by hydraulic or pneumatic jack
US4271781A (en) * 1978-10-25 1981-06-09 Cowie David B Outboard motor clutches
US4298113A (en) * 1977-05-05 1981-11-03 Dominion Engineering Works Limited Drive system for grinding mills
US4433769A (en) * 1978-10-13 1984-02-28 Dominion Engineering Works Limited Grinding mill control system
US4520910A (en) * 1982-12-09 1985-06-04 Canadian General Electric Company Limited Grinding mill control using controlled pulsing of air clutches
US4690250A (en) * 1985-09-05 1987-09-01 Car-O-Liner Company Vehicle bench lift
US4712653A (en) * 1985-08-14 1987-12-15 Lift-R Technologies, Inc. Energy-recycling scissors lift
US5008561A (en) * 1989-03-16 1991-04-16 Lucas Industries Device depowering apparatus
US5670856A (en) * 1994-11-07 1997-09-23 Alliedsignal Inc. Fault tolerant controller arrangement for electric motor driven apparatus
US5695173A (en) * 1996-01-11 1997-12-09 Ochoa; Arturo Valencia Scissors lift platform with electronic control
US6182945B1 (en) * 1996-09-12 2001-02-06 National Oilwell, L.P. Redundant drawworks
US6352136B1 (en) * 2000-06-19 2002-03-05 Kuei-Tang Shih Auxiliary safety lift device for elevator
US6566826B2 (en) * 2000-08-11 2003-05-20 Honda Giken Kogyo Kabushiki Kaisha Power transmitting apparatus for hybrid vehicle and method of controlling power transmitting apparatus
US20030114270A1 (en) * 2001-12-14 2003-06-19 Wuertz Robert M. Drive-by-wire riding lawn mower
US20030168646A1 (en) * 2002-03-07 2003-09-11 Adelardo Lopez Alba Scissor lifting table
US6626653B2 (en) * 2001-01-17 2003-09-30 Delta Electronics Inc. Backup heat-dissipating system
US20030183470A1 (en) * 2000-10-03 2003-10-02 Johnson Kenneth O. Automatic transmission friction clutch
US6674828B1 (en) * 2002-06-14 2004-01-06 David P. Weber Safe lift and process for transporting canisters of spent nuclear fuel
US6705238B1 (en) * 1999-05-08 2004-03-16 Heckert Gmbh Scissors-type lifting table
US20040251453A1 (en) * 2003-03-04 2004-12-16 Pro Hub Hebetechnik Gmbh Scissor lift mechanism
US20050034930A1 (en) * 2003-08-12 2005-02-17 Kuei-Tang Shih Emergency safeguard system for elevator
US20050050965A1 (en) * 2003-09-05 2005-03-10 Ford Motor Company System and method for monitoring torque in an electric motor
US20050095138A1 (en) * 2003-10-31 2005-05-05 Robertson Naysen J. Scalable, modular, high availability fan system
US20050200205A1 (en) * 2004-01-30 2005-09-15 Winn David W. On-site power generation system with redundant uninterruptible power supply
US6956344B2 (en) * 2003-10-31 2005-10-18 Hewlett-Packard Development Company, L.P. High availability fan system
US20050269887A1 (en) * 2004-06-04 2005-12-08 The Boeing Company High-reliability electro-mechanical actuator
US20060113149A1 (en) * 2002-08-07 2006-06-01 Prat Jaume T Operating mechanism for a parking break

Patent Citations (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1991255A (en) * 1932-02-29 1935-02-12 Martin Louis Joseph Henri Elevator for any applications
US3237921A (en) * 1963-08-13 1966-03-01 Jarke Corp Power operated platform
US3628621A (en) * 1970-01-12 1971-12-21 William H Lee Drive and control system for electric automobiles
US3757912A (en) * 1972-06-07 1973-09-11 Philadelphia Gear Corp Load equalizing clutch controls
US3785462A (en) * 1972-06-23 1974-01-15 Applied Radiation Corp Scissor lift and drive mechanism therefor
US4078269A (en) * 1975-08-29 1978-03-14 Firma Binz & Co. Litter frame with supporting platform which can be raised by hydraulic or pneumatic jack
US4298113A (en) * 1977-05-05 1981-11-03 Dominion Engineering Works Limited Drive system for grinding mills
US4433769A (en) * 1978-10-13 1984-02-28 Dominion Engineering Works Limited Grinding mill control system
US4271781A (en) * 1978-10-25 1981-06-09 Cowie David B Outboard motor clutches
US4520910A (en) * 1982-12-09 1985-06-04 Canadian General Electric Company Limited Grinding mill control using controlled pulsing of air clutches
US4712653A (en) * 1985-08-14 1987-12-15 Lift-R Technologies, Inc. Energy-recycling scissors lift
US4690250A (en) * 1985-09-05 1987-09-01 Car-O-Liner Company Vehicle bench lift
US5008561A (en) * 1989-03-16 1991-04-16 Lucas Industries Device depowering apparatus
US5670856A (en) * 1994-11-07 1997-09-23 Alliedsignal Inc. Fault tolerant controller arrangement for electric motor driven apparatus
US5695173A (en) * 1996-01-11 1997-12-09 Ochoa; Arturo Valencia Scissors lift platform with electronic control
US6182945B1 (en) * 1996-09-12 2001-02-06 National Oilwell, L.P. Redundant drawworks
US6705238B1 (en) * 1999-05-08 2004-03-16 Heckert Gmbh Scissors-type lifting table
US6352136B1 (en) * 2000-06-19 2002-03-05 Kuei-Tang Shih Auxiliary safety lift device for elevator
US6566826B2 (en) * 2000-08-11 2003-05-20 Honda Giken Kogyo Kabushiki Kaisha Power transmitting apparatus for hybrid vehicle and method of controlling power transmitting apparatus
US20030183470A1 (en) * 2000-10-03 2003-10-02 Johnson Kenneth O. Automatic transmission friction clutch
US6626653B2 (en) * 2001-01-17 2003-09-30 Delta Electronics Inc. Backup heat-dissipating system
US20030114270A1 (en) * 2001-12-14 2003-06-19 Wuertz Robert M. Drive-by-wire riding lawn mower
US20030168646A1 (en) * 2002-03-07 2003-09-11 Adelardo Lopez Alba Scissor lifting table
US6674828B1 (en) * 2002-06-14 2004-01-06 David P. Weber Safe lift and process for transporting canisters of spent nuclear fuel
US20060113149A1 (en) * 2002-08-07 2006-06-01 Prat Jaume T Operating mechanism for a parking break
US20040251453A1 (en) * 2003-03-04 2004-12-16 Pro Hub Hebetechnik Gmbh Scissor lift mechanism
US20050034930A1 (en) * 2003-08-12 2005-02-17 Kuei-Tang Shih Emergency safeguard system for elevator
US20050050965A1 (en) * 2003-09-05 2005-03-10 Ford Motor Company System and method for monitoring torque in an electric motor
US20050095138A1 (en) * 2003-10-31 2005-05-05 Robertson Naysen J. Scalable, modular, high availability fan system
US6956344B2 (en) * 2003-10-31 2005-10-18 Hewlett-Packard Development Company, L.P. High availability fan system
US20050200205A1 (en) * 2004-01-30 2005-09-15 Winn David W. On-site power generation system with redundant uninterruptible power supply
US20050269887A1 (en) * 2004-06-04 2005-12-08 The Boeing Company High-reliability electro-mechanical actuator

Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110064551A1 (en) * 2005-01-13 2011-03-17 Pogue Richard W Pull and lift system for transporting roofing materials
US8876455B2 (en) * 2005-01-13 2014-11-04 Richard W. Pogue Pull and lift system for transporting roofing materials
US20090300844A1 (en) * 2006-02-27 2009-12-10 Brian Taylor Surgical table
EP2019076A1 (en) * 2007-07-27 2009-01-28 Ludwig Göcke Power-operated scissor table
US20110139548A1 (en) * 2009-12-16 2011-06-16 Herkules Equipment Corporation Belt-driven transportation system
US20110139549A1 (en) * 2009-12-16 2011-06-16 Herkules Equipment Corporation Belt-driven transportation system
US8662477B2 (en) 2009-12-16 2014-03-04 Herkules Equipment Corporation Belt-driven transportation system
US8714524B2 (en) 2009-12-16 2014-05-06 Herkules Equipment Corporation Belt-driven transportation system
US8733508B2 (en) 2010-04-02 2014-05-27 Herkules Equipment Corporation Scissor lift assembly
WO2012135078A2 (en) * 2011-03-25 2012-10-04 Boomerang Systems, Inc. Scissor lift
WO2012135078A3 (en) * 2011-03-25 2012-12-27 Boomerang Systems, Inc. Scissor lift
US8827246B2 (en) 2011-03-25 2014-09-09 Parking Source Llc Scissor lift
USD668425S1 (en) 2011-03-29 2012-10-02 Boomerang Systems, Inc. Scissor assembly for a scissor lift
US9340398B2 (en) * 2012-03-27 2016-05-17 Rofa Industrial Automation Ag Scissor lift table
US20130256611A1 (en) * 2012-03-27 2013-10-03 Rofa Industrial Automation Ag Scissor lift table
US20140014886A1 (en) * 2012-07-13 2014-01-16 Rofa Industrial Automation Ag Lift table control
US9377238B2 (en) * 2013-03-14 2016-06-28 Electrolux Home Products, Inc. Refrigerator with a scissor-type lift mechanism
US9422142B2 (en) 2013-08-01 2016-08-23 Herkules Equipment Corporation Scissor-type lift assembly
AU2015247798B2 (en) * 2014-04-14 2018-02-22 Ergotron, Inc. Height adjustable desktop work surface
US9668572B2 (en) 2014-04-14 2017-06-06 Ergotron, Inc. Height adjustable desktop work surface
US11033102B2 (en) 2014-04-14 2021-06-15 Ergotron, Inc. Height adjustable desktop work surface
US20150289641A1 (en) * 2014-04-14 2015-10-15 Mustafa A. Ergun Height adjustable desktop work surface
US10524565B2 (en) 2014-04-14 2020-01-07 Ergotron, Inc. Height adjustable desktop work surface
US20180070732A1 (en) * 2015-09-01 2018-03-15 Ramakrishna Pillay Micro Lift-OAST Device
US10542817B2 (en) 2015-09-24 2020-01-28 Ergotron, Inc. Height adjustable device
US11076688B2 (en) 2015-10-08 2021-08-03 Ergotron, Inc. Height adjustable table
US10602840B2 (en) 2015-10-08 2020-03-31 Ergotron, Inc. Height adjustable table
US10159336B2 (en) 2016-09-23 2018-12-25 Varidesk, Llc Electrically-lifted computer desk and office desk thereof
US11019920B2 (en) 2016-09-23 2021-06-01 Varidesk, Llc Electrically-lifted computer desk and office desk thereof
JP2018080029A (en) * 2016-11-17 2018-05-24 アルインコ株式会社 Lift device
US9961991B1 (en) * 2016-12-22 2018-05-08 Ying Liang Health Tech. Co., Ltd. Desktop liftable platform
US10986918B2 (en) * 2017-12-22 2021-04-27 Loctek Inc. Lifting table
US10465970B1 (en) * 2018-06-11 2019-11-05 Lg Electronics Inc. Refrigerator
US20230304729A1 (en) * 2019-11-20 2023-09-28 Lg Electronics Inc. Refrigerator
WO2023052770A1 (en) * 2021-09-30 2023-04-06 Accora Limited Bed lifting mechanism

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