| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 187272000 | Includes fluid supporting ram in drive-means | 11 |
| 20090014251 | POSITIONING SYSTEM - A positioning system for attachment to a vehicle for operation of a power tool by a ground-based operator sitting in the vehicle provides a telescoping mast attached to the vehicle, a pivot bracket connecting an upper arm to the upper portion of the telescoping mast, mounting means for mounting the power tool on the upper arm; and power means for operating the power tool from the operator's position in the vehicle. | 01-15-2009 |
| 20110127115 | DRIVE SYSTEMS - A hydraulically driven elevator or lift is provided with counterbalance means to at least partly counterbalance the load imposed by the load carrier or lift car. Operation of the counterbalance means, which includes a source of hydraulic fluid communicating with an accumulator, does not involve any interference with the working fluid of the hydraulic drive system. | 06-02-2011 |
| 20140174860 | SABBATH ELEVATOR - A drive system provides a displacement mechanism for driving motion of a device using energy stored in an energy accumulator in a non-electric form. A charge/discharge arrangement selectively charges the energy accumulator with energy derived from an energy source while isolated from the displacement mechanism, and the connects the energy accumulator to the displacement mechanism to provide energy for driving motion of the device. The energy accumulator may be hydraulic, pneumatic or gravitational. Examples of devices driven by the system include elevators, escalators and vehicles. | 06-26-2014 |
| 20150353324 | HYDRAULIC ELEVATOR SYSTEM AND METHOD - A hydraulic elevator system is operable to selectively raise and lower an elevator car. The system raises and lowers the elevator car by actuating a hydraulic jack. The system retracts a hydraulic jack that is fixed to an upper portion of the hoistway by pressurizing hydraulic fluid within the hydraulic jack via a hydraulic fluid pump. When retracting the hydraulic jack the elevator car travels upward. An accumulator usable with the system is operable to store energy during the downward travel of the elevator car for later use during the upward travel of the elevator car. | 12-10-2015 |
| 187273000 | Pneumatic (e.g., steam) | 1 |
| 20080277208 | Balanced actuator device and hoisting and transporting apparatus incorporating such device - The present application finds application in the technical field of the devices for hoisting and transporting loads and relates to a balanced actuator device for lifting and transporting apparatus comprises a bearing frame ( | 11-13-2008 |
| 187275000 | With fluid flow controlling means | 6 |
| 20080257652 | Lifting Ram For Lifting Platforms - The invention relates to a lifting ram for lifting platforms, in particular for underfloor lifting platforms, comprising an inner tubular body ( | 10-23-2008 |
| 20090026020 | ELEVATING DEVICE AND CONTROL METHOD THEREOF, AND IMAGING APPARATUS - An elevating device based on fluid control includes a pump and a cylinder that are connected to each other by a flow path, wherein the cylinder and a reservoir are connected to each other by a flow path via a fixed flow valve that allows fluid to flow at a predetermined flow rate. When a lowering operation of a table section is carried out, a pump-valve control unit brings a flow rate of discharge of the fluid by the pump and a flow rate of the fluid returned to the reservoir through the fixed flow valve into equilibrium and thereafter sets the flow rate of discharge of the fluid by the pump smaller than the predetermined flow rate thereby to reduce the amount of the fluid held in the cylinder. | 01-29-2009 |
| 20090050415 | Goods presentation arrangement - In a goods presentation arrangement with a base part ( | 02-26-2009 |
| 20130333982 | METHOD FOR MODERNIZING A HYDRAULIC ELEVATOR - A method for modernizing a hydraulic elevator including an elevator car guided by car guide rails for moving in an essentially vertical direction in the elevator hoistway, a hydraulic system including a lifting cylinder having a cylinder part essentially vertically supported on the base of the elevator hoistway and a piston rod moving in relation to the cylinder part and a hydraulic powerpack and a control center. The hydraulic system of the hydraulic elevator is modernized to include a function for preventing unintended starting at a floor, in such a way that the hydraulic powerpack is retained and an electrically-operating valve that is monitored with a control and that acts on the flow of hydraulic fluid of the lifting cylinder is added to the hydraulic system. The control controls a valve to prevent movement of the piston rod of the lifting cylinder downwards and/or upwards, if predetermined criteria are fulfilled. | 12-19-2013 |
| 20150014099 | DEVICE AND METHOD FOR CONTROLLING A HYDRAULIC SYSTEM, ESPECIALLY OF AN ELEVATOR - The present invention relates to a control device for pressure control in a hydraulic system, especially of an elevator-system, the control device is adapted to control an output variable of an inverter supplying a hydraulic pump of the hydraulic system with electric energy, the output variable is adapted to adjust the speed of the hydraulic pump in order to at least partly compensate for a leakage of operating fluid in the hydraulic pump. Further, the invention relates to an elevator-system comprising a hydraulic pump, an inverter, and a control device which controls a supply of the hydraulic pump with electric energy from the inverter. Moreover, the invention relates to a method for pressure control in a hydraulic system, especially of an elevator-system, the method comprising the steps of supplying a hydraulic pump of the hydraulic system with electric energy from an inverter, controlling at least one output variable of the inverter for adjusting the speed of the hydraulic pump, in order to at least partly compensate for a leakage of operating fluid in the hydraulic pump. For providing an inexpensive elevating solution with good right quality for hydraulic elevators, the present invention provides that the control device comprises a computing module which is adapted to determine the output variable based on at least one inverter parameter. | 01-15-2015 |
| 20150360910 | Auxiliary Pumping Unit - A pumping unit for use with a hydraulic elevator system includes a reservoir storing fluid, a first pump, and a second pump. The first pump is coupled with the reservoir and the elevator system to communicate fluid between the reservoir and the elevator system to actuate the elevator system. The second pump is also coupled with the reservoir and the elevator system to communicate fluid between the reservoir and the elevator system to actuate the elevator system. The second pump is selectively actuatable when the first pump is inactivated. | 12-17-2015 |
