Invention Grant
- Patent Title: Retractable ladder
- Patent Title (中): 伸缩梯
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Application No.: US13408929Application Date: 2012-02-29
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Publication No.: US08944211B2Publication Date: 2015-02-03
- Inventor: Richard C. Blaska
- Applicant: Richard C. Blaska
- Agency: Peninsula Patent Group
- Agent Lance Kreisman
- Main IPC: E06C9/00
- IPC: E06C9/00 ; E06C9/08 ; E06C7/50

Abstract:
A retractable ladder assembly for use in an elevator pit is disclosed. The retractable ladder assembly includes a ladder having spaced-apart parallel stiles coupled together via a plurality of stacked horizontally-disposed rungs. At least one pivot arm having a first end is coupled to the ladder. A second end of the pivot arm is adapted for coupling to a wall in the pit. The ladder assembly further includes a lift assist mechanism having a first end coupled to the ladder, and a second end for coupling to the wall. The lift assist mechanism is operative to assist in manually pivoting the ladder to a retractable state.
Public/Granted literature
- US20120222915A1 RETRACTABLE LADDER Public/Granted day:2012-09-06
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