Guided Rigid Ladder Patents (Class 182/79)
  • Patent number: 7587866
    Abstract: An integrated insulated housing system with handrails and a system of seals for a pull down stairway opening is provided. The integrated housing system reduces air convection, moisture loss and dirt infiltration. The insulation of the housing system reduces heat loss. Handrails as part of the system are deployed by the action of the pull down stairway. No manual intervention is required. As the stairway is pulled down for use, the integrated housing above moves away from the access opening. Simultaneously, the two integrated handrails move into a stable position on the upper floor and to either side of the stairway. As the stairway is returned up to its closed position, the connected insulated housing moves back into position sealing the access opening.
    Type: Grant
    Filed: March 25, 2005
    Date of Patent: September 15, 2009
    Inventor: Donald Burgess Perkins
  • Patent number: 5111906
    Abstract: A retractable ladder apparatus (30) for access between a lower and an upper floor is provided. A ladder (60) is moved by moving means, which may be a garage door opener (40), between a position of storage within the upper floor to a position where the lower end of the ladder abuts the lower floor.
    Type: Grant
    Filed: February 7, 1991
    Date of Patent: May 12, 1992
    Inventor: Auguste Abadia
  • Patent number: 3985202
    Abstract: A unitary stairway (as distinguished from a sectional folding stairway) is adapted to assume an inclined operative position and an upper horizontal inoperative position above the ceiling of the room. Hydraulic means imparts longitudinal forces to the stairway to move it upwardly or downwardly, and rails carried by the stairway are engageable in guide rollers to guide the stairway between operative and inoperative positions. A wall switch is operable to energize a motor for driving a pump to generate power in the hydraulic means.
    Type: Grant
    Filed: June 23, 1975
    Date of Patent: October 12, 1976
    Assignee: Precision Parts Corporation
    Inventor: Paul V. Harmon