Patents by Inventor Keijo Vajavaara

Keijo Vajavaara 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).

  • Elevator and means for forming a safety space
    Patent number: 9878877
    Abstract: An elevator includes at least an elevator car arranged to move reciprocally in an elevator hoistway and fitted on guide rails, a plurality of landing doors having landing door locks openable e.g. with a service key, and a safety arrangement arranged to form a safe space, preferably a working space, in the elevator hoistway below the elevator car, access to which safe space is enabled via at least one landing door in the proximity of the base of the elevator hoistway, and/or a safe space, preferably a working space, above the elevator car, to which access is enabled via at least one landing door leading to the roof of the elevator car, and in which elevator the aforementioned safe space has a minimum height. The formation of each safe space is arranged to be implemented as a consequence of the opening occurring, e.g. with a service key, from a floor level of a landing door enabling access into the elevator hoistway.
    Type: Grant
    Filed: June 26, 2015
    Date of Patent: January 30, 2018
    Assignee: KONE CORPORATION
    Inventors: Jari Pursiainen, Samuli Mäntynen, Matti Räsänen, Jaakko Kahila, Keijo Vajavaara, Mika Alvesalo, Markku Haapaniemi, Kristian Viinikkala
  • ELEVATOR AND MEANS FOR FORMING A SAFETY SPACE
    Publication number: 20150321882
    Abstract: An elevator includes at least an elevator car arranged to move reciprocally in an elevator hoistway and fitted on guide rails, a plurality of landing doors having landing door locks openable e.g. with a service key, and a safety arrangement arranged to form a safe space, preferably a working space, in the elevator hoistway below the elevator car, access to which safe space is enabled via at least one landing door in the proximity of the base of the elevator hoistway, and/or a safe space, preferably a working space, above the elevator car, to which access is enabled via at least one landing door leading to the roof of the elevator car, and in which elevator the aforementioned safe space has a minimum height. The formation of each safe space is arranged to be implemented as a consequence of the opening occurring, e.g. with a service key, from a floor level of a landing door enabling access into the elevator hoistway.
    Type: Application
    Filed: June 26, 2015
    Publication date: November 12, 2015
    Applicant: KONE CORPORATION
    Inventors: Jari Pursiainen, Samuli Mãntynen, Matti Räsänen, Jaakko Kahila, Keijo Vajavaara, Mika Alvesalo, Markku Haapaniemi, Kristian Viinikkala