Patents by Inventor Zev BIANCHI

Zev BIANCHI 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).

  • Retractable staircase
    Patent number: 11408180
    Abstract: A retractable staircase having a first side stringer and a second substantially parallel side stringer connected to a plurality of steps. The first side stringer is fixedly attached to a wall and the second side stringer is pivotally movable about the first side stringer between an extended position, where the steps lie substantially horizontally between the stringers, and a retracted position where the steps lie substantially vertically between the stringers. The retractable staircase also includes a collapsible handrail and a gate that are interconnected with the side stringers and the pivoting steps so that when one of them is moved, the other two move substantially simultaneously.
    Type: Grant
    Filed: January 8, 2021
    Date of Patent: August 9, 2022
    Inventor: Zev Bianchi
  • RETRACTABLE STAIRCASE
    Publication number: 20210131112
    Abstract: A retractable staircase having a first side stringer and a second substantially parallel side stringer connected to a plurality of steps. The first side stringer is fixedly attached to a wall and the second side stringer is pivotally movable about the first side stringer between an extended position, where the steps lie substantially horizontally between the stringers, and a retracted position where the steps lie substantially vertically between the stringers. The retractable staircase also includes a collapsible handrail and a gate that are interconnected with the side stringers and the pivoting steps so that when one of them is moved, the other two move substantially simultaneously.
    Type: Application
    Filed: January 8, 2021
    Publication date: May 6, 2021
    Inventor: Zev BIANCHI
  • Retractable staircase
    Patent number: 10889993
    Abstract: A retractable staircase having a first side stringer and a second substantially parallel side stringer connected to a plurality of steps. The first side stringer is fixedly attached to a wall and the second side stringer is pivotally movable about the first side stringer between an extended position, where the steps lie substantially horizontally between the stringers, and a retracted position where the steps lie substantially vertically between the stringers. The retractable staircase also includes a collapsible handrail and a gate that are interconnected with the side stringers and the pivoting steps so that when one of them is moved, the other two move substantially simultaneously.
    Type: Grant
    Filed: August 10, 2016
    Date of Patent: January 12, 2021
    Inventor: Zev Bianchi
  • RETRACTABLE STAIRCASE
    Publication number: 20200199881
    Abstract: A retractable staircase having a first side stringer and a second substantially parallel side stringer connected to a plurality of steps. The first side stringer is fixedly attached to a wall and the second side stringer is pivotally movable about the first side stringer between an extended position, where the steps lie substantially horizontally between the stringers, and a retracted position where the steps lie substantially vertically between the stringers. The retractable staircase also includes a collapsible handrail and a gate that are interconnected with the side stringers and the pivoting steps so that when one of them is moved, the other two move substantially simultaneously.
    Type: Application
    Filed: August 10, 2016
    Publication date: June 25, 2020
    Inventor: Zev BIANCHI
  • Sidefolding staircase
    Patent number: D1084403
    Type: Grant
    Filed: September 27, 2024
    Date of Patent: July 15, 2025
    Inventor: Zev Bianchi