Implements or apparatus for applying pushing or pulling force – Device or member for contacting and guiding moving cable – Including rotatable – cable contacting – pulley wheel element
Reexamination Certificate
1998-10-23
2001-02-20
Matecki, Katherine A. (Department: 3653)
Implements or apparatus for applying pushing or pulling force
Device or member for contacting and guiding moving cable
Including rotatable, cable contacting, pulley wheel element
C254S393000, C254S399000
Reexamination Certificate
active
06189867
ABSTRACT:
BACKGROUND OF THE INVENTION
The load-handling devices may be used to raise or lower loads and will typically provide a mechanical advantage to the user to facilitate the handling of loads. One of the most common forms of load handling device with a mechanical advantage is a pulley arrangement in which a pair of pulleys are interconnected by a rope. One of the pulleys is connected to a fixed support and the other connected to the load and the entrainment of the rope around the pulleys enables the load to be raised or lowered. The mechanical advantage obtained will depend upon the number of pulleys used in the train.
One application for such a load-handling device is for use with rescue teams in which it is frequently necessary to lift or lower an injured person. In those circumstances a pulley system would be utilized to give the necessary mechanical advantage to the rescuer. With a conventional arrangement of pulley system it is necessary to control the lowering of the load by maintaining a restraining force that is the same as the force required to lift the load. In certain circumstances this may be onerous, particularly where the rescue is occurring in a hazardous environment.
It is therefore an object of the present invention to provide a load-handling device in which the above disadvantages are obviated or mitigated.
SUMMARY OF THE INVENTION
In general terms the present invention provides a load handling device comprising of a pair of pulley assemblies each having a body at least one pulley supported by the body. The pulley has a peripheral outer surface and a rope secured at one end to a support structure and entrained bout each of said outer surfaces interconnects the pulleys in a load handling arrangement. Each of said pulley assemblies includes a one way clutch acting between the body and the pulley to inhibit rotation relative to the body in one direction. The surfaces thereby provide frictional engagement for said rope in the one direction to facilitate handling of said load.
The present invention also encompasses a pulley assembly having a body, a pulley mounted on the body and a one way clutch acting between the pulley and the body to inhibit rotation of said pulley relative to said body in one direction.
REFERENCES:
patent: D. 395114 (1998-06-01), Wullimann
patent: D. 400084 (1998-10-01), Wullimann
patent: 848905 (1907-04-01), Jenson
patent: 1878312 (1932-09-01), Parker
patent: 1890992 (1932-12-01), Janssen
patent: 1971511 (1934-08-01), Stahl
patent: 3714838 (1973-02-01), Gilson
patent: 3807696 (1974-04-01), Brda
patent: 5168958 (1992-12-01), Wullimann
patent: 5538223 (1996-07-01), Scace et al.
patent: 5622237 (1997-04-01), Moldow
patent: 5868380 (1999-02-01), Allen
patent: 2053092 (1991-10-01), None
patent: 2236033 (1995-12-01), None
patent: 2240122 (1998-06-01), None
patent: 728092 (1955-04-01), None
“ROLLGLISS The Universal Rescue and Utility System” Brochure; Breitenau 10, D-8112 Bad Kohlgrub, Landkreis Garmisch-Partenkirchen, No Date Available.
Coffman Thomas E.
O'Rourke Michael J.
Birch & Stewart Kolasch & Birch, LLP
Matecki Katherine A.
Surety Manufacturing & Testing Ltd.
LandOfFree
Load-handling device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Load-handling device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Load-handling device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2592261