Abstract: The invention relates to an elevator comprising an electric linear motor comprising at least one linear stator designed to be located in a fixed correlation to an environment, particularly building, and at least one mover designed for connection with an elevator car to be moved and co-acting with the stator to move the car, which motor comprises a stator beam supporting said at least one stator, which stator beam has at least one side face carrying ferromagnetic poles of said stator spaced apart by a pitch, and which mover comprises at least one counter-face facing said side face(s) of the stator beam, in which counter-face electro-magnetic components of the mover are arranged to co-act with the ferromagnetic poles mounted on the stator beam, which elevator comprises an elevator brake.
February 22, 2018
Date of Patent:
August 10, 2021
Tero Hakala, Ari Kattainen, Jussi Lähteenmäki, Seppo Suur-Askola, Jussi Perälä, Tero Purosto
Abstract: The disclosure relates to a lift installation having a lift car which can be moved along a guide rail. The lift installation here comprises at least a first pair of rollers and a second pair of rollers. The guide rail runs between the two rollers of the first pair of rollers and between the two rollers of the second pair of rollers. The lift installation also has an apparatus for subjecting the lift car to a retaining force, wherein there is a horizontal offset between the point at which the retaining force takes effect and the center of gravity of the lift car, and therefore the lift car is subjected to a first torque.
October 22, 2015
Date of Patent:
April 23, 2019
thyssenkrupp Elevator AG, thyssenkrupp AG
Abstract: A below ground component management system includes a base plate disposed below a ground surface, a sleeve connected to the base plate and extending substantially perpendicular thereto toward the ground surface, and a cover sealably connected to an upper opening of the sleeve to form a substantially fluid-tight compartment with the base plate and the sleeve. The system also includes a component rack disposed within the compartment, and an actuator assembly configured to pass at least a portion of the rack through the opening. The actuator assembly includes a bracket, and first and second cylinders connected to the bracket. The first cylinder has a piston extending toward the base plate and the second cylinder has a piston extending toward the opening.
Abstract: A pallet positioner includes a support frame that consists of a main upright structure with a pair of spaced, parallel outriggers extending horizontally at ground level. The distal ends of the outriggers are connected by a low-profile ramp. The upright structure includes a pair of vertical guide masts rigidly mounted on a horizontal base bracing the proximal ends of the outriggers. A pneumatically and hydraulically controlled, or electrically and hydraulically controlled, cantilevered carrier with a rotatable platform is mounted for vertical motion along the vertical guide masts. When the carrier travels downward, the carrier stops automatically at a level above the outriggers and must be manually restarted. A braking system under the platform prevents rotation thereof at ground level.
Abstract: A multistage mast assembly for use on a lift truck and method of operation for staging first and second mast sections of the multistage mast assembly. Each mast section has a retracted position and an extended position. The apparatus includes a mast staging hydraulic circuit which diverts hydraulic fluid from the second mast section actuator to the first mast section actuator using a multi-position valve having an open position and a restricted flow position. In the restricted flow position, hydraulic pressure in a hydraulic line supplying the second mast section increases to divert hydraulic fluid to the first mast section actuator before the second mast section reaches its extended position.
Abstract: In the buffer device for an elevator of the present invention, a hydraulic buffer that alleviates shock generated when a traveling body impacts a bottom of a hoistway is arranged at the bottom of the hoistway. Provided between the traveling body and the bottom of the hoistway is an elastic member that is elastically deformed and that alleviates the shock generated by the impact of the traveling body with the hydraulic buffer. The elastic member is arranged so that when elastically deformed, almost the whole thereof is positioned within a range of a vertical dimension of the hydraulic buffer.
May 20, 2003
November 27, 2003
Mitsubishi Denki Kabushiki Kaisha
Hiroshi Kigawa, Takashi Yumura, Sen Zhao, Chang-Ming Zhu
Abstract: A safety brake for braking a load receiving portion of an elevator has at least one brake wedge that penetrates a gap between a resiliently supported pressure body and a guide rail for the load receiving portion of the elevator and thereby generates a braking force. A stroke limiting device limits the penetration stroke of the brake wedge and controls the braking force in dependence on the retardation value of the load receiving portion of the elevator.
Abstract: In the conventional elevator, there arise problems that there is no apparatus capable of reducing only radio-frequency components according to the characteristics of the rubber isolator and dealing with vertical vibration of the entire car, although it is possible to reduce the vibration descending along the rope while passing through the rubber isolator at the lower portion of the car.
Abstract: A virtually active hitch system is provided for the damping of vertical oscillations of an elevator car during a semi-active hitch mode of operation along a relatively lengthy elevator travel path and for load leveling the elevator car during an active mode when the elevator is braked. The virtually active hitch stores energy derived from the elevator motor during the semi-active mode, and utilizes that stored energy during the active mode to actively adjust the positioning of the elevator car, as might result from load changes. The hitch assembly may advantageously use hydraulic piston and cylinder means to adjust, or impede adjustment of, a limited hitch gap between a support rope and the elevator car. The hydraulic circuit associated with the piston and cylinder may include a variable orifice valve to control damping action and a pair of accumulators controlled via a switching network to selectively store and release energy and to also serve as a spring.