Fire escape – ladder – or scaffold – Ladder with land vehicle
Reexamination Certificate
2000-11-28
2002-06-18
Lev, Bruce A. (Department: 3634)
Fire escape, ladder, or scaffold
Ladder with land vehicle
C182S115000, C182S141000
Reexamination Certificate
active
06405831
ABSTRACT:
TECHNICAL FIELD
This invention relates to mobile lifts and more particularly to wheeled lifts having an elevatable platform with a hoist for rescuing a human from an enclosure; as well as lowering a human into and removing a human from an enclosure.
BACKGROUND ART
Mobile lifts have been used to elevate materials and workmen for a variety of purposes. One such lift includes a chassis mounted on four wheels with one section of an extension ladder rigidly supported on the chassis at an obtuse angle. An extensible section of the ladder supports a horizontal work platform. A hand winch is used to elevate and lower the extensible section of the ladder with the supported work platform. The work platform extends beyond the chassis of the mobile lift to permit placement of material or personnel beyond the area in which the wheeled chassis is free to travel. The platform may include a vertical entryway to permit access to the top opening of a container when the platform rests on the container with the entryway aligned with the top opening. Although these previously designed mobile lifts are advantageously used in numerous applications, there remains a need for equipment to quickly aid in rescue of incapacitated personnel from enclosures, such as storage tanks.
DISCLOSURE OF THE INVENTION
The present invention is directed to providing a mobile human lift unit for rescuing personnel from enclosures. An overhead hoist is mounted on an elevatable platform having a vertical entryway. The overhead hoist includes a winch having a cable reeved on an overhead pulley with its free end attachable to a human lift harness or the like. The rescue equipment is mobile to permit it to be quickly positioned to effect a human rescue operation. The platform is vertically adjustable to correspond to the height of a variety enclosures. The overhead hoist may take the form of a tripod, an overhead track and dolly or an overhead crane. The use of an overhead crane which pivots about a vertical axis, facilitates lowering of a rescued person to the ground.
REFERENCES:
patent: 2777737 (1957-01-01), Balogh
patent: 3204721 (1965-09-01), Park
patent: 3232377 (1966-02-01), Smith
patent: 3817347 (1974-06-01), Spencer
patent: 3882964 (1975-05-01), Schellenberg
patent: 4390080 (1983-06-01), Bushnell, Jr.
patent: 4484366 (1984-11-01), Koontz
patent: 4529063 (1985-07-01), Kishi
patent: 5111907 (1992-05-01), Kishi
patent: 5299653 (1994-04-01), Nebel
patent: 5538382 (1996-07-01), Hasegawa et al.
patent: 5862827 (1999-01-01), Howze
patent: 5927440 (1999-07-01), Freeman
Aluminum Ladder Company
Lev Bruce A.
Nexsen Pruet Jacobs & Pollard LLC
Schwab Charles L.
LandOfFree
Mobile lift unit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Mobile lift unit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mobile lift unit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2953900