Fire escape – ladder – or scaffold – Torso harness – Strand-engaging – with descent retarder
Reexamination Certificate
2011-06-21
2011-06-21
Chin-Shue, Alvin C (Department: 3634)
Fire escape, ladder, or scaffold
Torso harness
Strand-engaging, with descent retarder
Reexamination Certificate
active
07963366
ABSTRACT:
The instant invention is a climbing device for belaying and rappelling. A tube is split into two parts that are hinged to pivot scissor-like. A loop of rope is inserted into the split tube and attached to the climber or an anchor with a carabiner. The split tube is open when the rope is slack and retains the one-piece tube belay device's characteristic advantages of smooth feed. The two parts pivot when there is tension in the rope, closing around the rope in a scissor-like movement that increases friction by pinching the rope against the carabiner, significantly reducing the brake-hand force needed to arrest and hold the weight of a climber. At least one spring applies the force that opens the spit tube when the device is not supporting a load. Alternate configurations include openings to control two ropes simultaneously; a lever to control the release of the rope when lowering a climber; and a means for attaching a second carabiner for rigging the device to belay a second with auto-braking. The instant invention is effective with climbing ropes of any diameter and can arrest rope moving through the device in either direction.
REFERENCES:
patent: 641809 (1900-01-01), Tillottson
patent: 4311218 (1982-01-01), Steffen
patent: 4333551 (1982-06-01), Shefrin
patent: 4531610 (1985-07-01), Fertier et al.
patent: 4645034 (1987-02-01), Griffith
patent: 4678059 (1987-07-01), Bowker
patent: D297811 (1988-09-01), Payan
patent: 4883146 (1989-11-01), Varner
patent: 5217092 (1993-06-01), Potter
patent: 5360083 (1994-11-01), Hede
patent: 5577576 (1996-11-01), Petzl et al.
patent: 5597052 (1997-01-01), Rogleja
patent: 5671822 (1997-09-01), Phillips
patent: 5855251 (1999-01-01), Deuer
patent: 5860493 (1999-01-01), Cherpitel
patent: 5924522 (1999-07-01), Ostrobrod
patent: 5934408 (1999-08-01), Flux
patent: D413786 (1999-09-01), Graham
patent: 5975243 (1999-11-01), Lorbek
patent: 6009977 (2000-01-01), Pelofi
patent: 6029777 (2000-02-01), Rogelja
patent: 6085866 (2000-07-01), Kowalewski
patent: 6095282 (2000-08-01), Sadeck
patent: 6095502 (2000-08-01), Dodge
patent: 6378650 (2002-04-01), Mauthner
patent: 6382355 (2002-05-01), Kowalewski
patent: 6446936 (2002-09-01), Ostrobrod
patent: 6467574 (2002-10-01), Lara
patent: D466794 (2002-12-01), Malkiel
patent: 6561313 (2003-05-01), Hewlett
patent: 6681891 (2004-01-01), Richard
patent: 6772483 (2004-08-01), Saunders
patent: 6843346 (2005-01-01), LeBeau
patent: 7055651 (2006-06-01), Klingler
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