Patents by Inventor Tarvo Viita-Aho

Tarvo Viita-Aho has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20200255262
    Abstract: An elevator arrangement having an elevator includes an elevator car having a floor and a roof. The elevator car is provided with one or more extension spaces which are arranged to extend the height of the elevator car during construction time use.
    Type: Application
    Filed: February 7, 2020
    Publication date: August 13, 2020
    Applicant: KONE Corporation
    Inventors: Markku Haapaniemi, Matti Räsänen, Markku Häivälä, Tarvo Viita-aho, Jukka Laitinen, Janne Mikkonen, Anssi Venho, Pekka Perunka, Hans Valtonen, Emil Hagström, Simo Mäkimattila
  • Publication number: 20200198935
    Abstract: The invention relates to a passenger conveyor, such as an escalator or autowalk, comprising a band of conveying elements; a diverting wheel for diverting the passage of the band of conveying elements and/or a traction member thereof and a brake for braking rotation of the diverting wheel. The brake comprises a screw member having a conical threaded external rim; a nut member having a conical threaded internal rim, the screw member and nut member being screwed together, one of said screw member and nut member being connected with the diverting wheel for being driven by the diverting wheel. The brake further comprises a stopping device for stopping rotation of the other of said screw member and nut member.
    Type: Application
    Filed: February 28, 2020
    Publication date: June 25, 2020
    Applicant: Kone Corporation
    Inventors: Tarvo VIITA-AHO, Jorma MUSTALAHTI, Raimo PELTO-HUIKKO, Janne LAINE
  • Patent number: 10662028
    Abstract: A method is provided for moving an elevator car in a rescue operation after at least one electric elevator brake have been actuated, whereafter the brake is re-opened via a manual brake opening device and operated to allow a movement of the elevator car to a next landing. The manual brake opening device is connected to an end limit indicator detector, which end limit indicator detector is configured to issue an end limit signal when elevator car arrives at an area of an end limit indicator at the end of its movement range of the elevator car in the elevator shaft. When the end limit indicator detector outputs an end limit signal to the manual brake opening device, the elevator brake is actuated by the manual brake opening device to stop the elevator car.
    Type: Grant
    Filed: July 5, 2016
    Date of Patent: May 26, 2020
    Assignee: KONE CORPORATION
    Inventors: Tarvo Viita-Aho, Jussi Lähteenmäki
  • Patent number: 9834420
    Abstract: A brake includes a frame part; an armature part supported by the frame part in a manner that allows movement; an electromagnet for opening the brake; and also a damping arrangement for damping the noise of the brake. The damping arrangement is made to be conductive to magnetic flux, and the damping arrangement is fitted on the pathway of the magnetic flux of the electromagnet of the brake.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: December 5, 2017
    Assignee: KONE CORPORATION
    Inventors: Jussi Lähteenmäki, Tarvo Viita-Aho
  • Publication number: 20170050821
    Abstract: A method is provided for moving an elevator car in a rescue operation after at least one electric elevator brake have been actuated, whereafter the brake is re-opened via a manual brake opening device and operated to allow a movement of the elevator car to a next landing. The manual brake opening device is connected to an end limit indicator detector, which end limit indicator detector is configured to issue an end limit signal when elevator car arrives at an area of an end limit indicator at the end of its movement range of the elevator car in the elevator shaft. When the end limit indicator detector outputs an end limit signal to the manual brake opening device, the elevator brake is actuated by the manual brake opening device to stop the elevator car.
    Type: Application
    Filed: July 5, 2016
    Publication date: February 23, 2017
    Applicant: KONE Corporation
    Inventors: Tarvo VIITA-AHO, Jussi LÄHTEENMÄKI
  • Patent number: 8365873
    Abstract: In a method for suppressing drifting of an elevator car away from a stopping floor, an operating condition of one or more machinery brakes of a hoisting machine of an elevator is monitored, and one or more machinery brakes are used to stop the elevator car from leaving a door zone of a stopping floor when at least one of the door of the elevator car and the landing door are open. Start of a next run of an elevator car that has left the door zone of the stopping floor is prevented when the at least one of the door of the elevator car and the landing door are open, and information about the preventing of the next run is recorded in a non-volatile memory of an elevator control unit.
    Type: Grant
    Filed: March 15, 2012
    Date of Patent: February 5, 2013
    Assignee: Kone Corporation
    Inventors: Tarvo Viita-Aho, Raimo Kaartinen, Jari Kantola
  • Publication number: 20120175201
    Abstract: A brake includes a frame part; an armature part supported by the frame part in a manner that allows movement; an electromagnet for opening the brake; and also a damping arrangement for damping the noise of the brake. The damping arrangement is made to be conductive to magnetic flux, and the damping arrangement is fitted on the pathway of the magnetic flux of the electromagnet of the brake.
    Type: Application
    Filed: March 23, 2012
    Publication date: July 12, 2012
    Inventors: Jussi LÄHTEENMÄKI, Tarvo Viita-Aho
  • Publication number: 20120168258
    Abstract: The invention presents a method and an arrangement for preventing the drifting of an elevator car away from the stopping floor.
    Type: Application
    Filed: March 15, 2012
    Publication date: July 5, 2012
    Applicant: KONE CORPORATION
    Inventors: Tarvo Viita-Aho, Raimo Kaartinen, Jari Kantola
  • Patent number: 6131704
    Abstract: Rail brake (1) for an elevator, comprising a brake body attached to the elevator car, a clamp part comprising jaws (3,4) that engage a guide rail (2) via braking surfaces during braking. A spring (10) generates a load on the clamp part to press the braking surfaces against the guide rail, and a magnet whose force produces an effect reverse to that of the spring releases the braking surfaces from the guide rail. The clamp part is floatably suspended relative to the brake body. The motion of the clamp part relative to the brake body is controlled by the guide rail (2).
    Type: Grant
    Filed: January 30, 1998
    Date of Patent: October 17, 2000
    Assignee: Kone Oy
    Inventors: Tarvo Viita-Aho, Esko Aulanko