Apparatus for raising and lowering a rotatable platform

Details Apparatus for raising and lowering a rotatable platform Apparatus for raising and lowering a rotatable platform

1990-07-12

1992-02-04

Britts, Ramon S.

Bridges

Gangway, ramp, or dock leveler

Attached

92 53, E01D 100

Patent

active

050849360

ABSTRACT:
An apparatus that raises and lowers a rotatable vestibule of the type used in airports to transfer passengers from a terminal building to a passenger loading bridge. A first plurality of telescoping columns are interconnected to and passively follow a second plurality of telescoping columns disposed interiorly of and in concentric relation with said first plurality of columns when the second columns are activated. J-shaped bushings made of Nylitron facilitate the extension and retraction of the columns and flat sections of that material provide additional bearing surfaces at other locations of the apparatus. The J-shaped bushing also provides stops that limit the extension of the apparatus.

REFERENCES:
patent: 2565730 (1951-08-01), Johnston et al.
patent: 2581293 (1952-01-01), Read et al.
patent: 2700169 (1955-01-01), Henion
patent: 2826280 (1958-03-01), Troche et al.
patent: 2875457 (1959-03-01), Read et al.
patent: 3110048 (1963-11-01), Bolton
patent: 3404417 (1968-10-01), Wollard et al.
patent: 3412412 (1968-11-01), Kjerulf et al.
patent: 4567811 (1986-02-01), Piegza et al.
patent: 4842238 (1989-06-01), Toiyama

Affiliated with

Also associated with

Rating

Apparatus for raising and lowering a rotatable platform does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for raising and lowering a rotatable platform, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for raising and lowering a rotatable platform will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-340578