Adjustable stairway having retractable wheel carriage

Details Adjustable stairway having retractable wheel carriage Adjustable stairway having retractable wheel carriage

1987-07-16

1988-09-06

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Means maintaining step lever on horizontally pivoted ladder

182 17, E06C 1397

Patent

active

047686170

ABSTRACT:
An adjustable stairway is disclosed that is supported on a retractable, wheel mounted carriage. A locking mechanism selectively maintains the carriage in a lowered, ground engaging position for easy maneuvering of the stairway. The weight of the stairway urges the carriage into a raised position when the locking mechanism is released, allowing the stairway to rest on stationary foot pads.

REFERENCES:
patent: 217439 (1879-07-01), Zimmermann
patent: 796915 (1905-08-01), Ketchum
patent: 2362170 (1944-11-01), Swaisgood
patent: 2512150 (1950-06-01), Geren
patent: 2585763 (1952-02-01), Gasner
patent: 2624590 (1953-01-01), Tilton
patent: 2798652 (1957-07-01), Easton
patent: 2969123 (1961-01-01), Jamerson
patent: 4392436 (1983-07-01), Weiler

Affiliated with

Also associated with

Rating

Adjustable stairway having retractable wheel carriage does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Adjustable stairway having retractable wheel carriage, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adjustable stairway having retractable wheel carriage will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1601706