Elevator – industrial lift truck – or stationary lift for vehicle – Having specific means contacting or on load support for...
Reexamination Certificate
2006-08-29
2006-08-29
Matecki, Kathy (Department: 3654)
Elevator, industrial lift truck, or stationary lift for vehicle
Having specific means contacting or on load support for...
C187S356000, C187S361000, C187S372000, C187S376000, C049S322000, C049S123000, C188S188000, C188S189000, C188S343000
Reexamination Certificate
active
07097003
ABSTRACT:
A vertically sliding freight elevator landing door with a safety brake that deploys when a chain suspending the door breaks. The safety brake is adapted for use on both panels that slide up to open or that slide down to open. The brake, which is simple in construction and installation, comprises, principally, a caliber block fixed to the door and a roller cam assembled in the block. A spring biases the roller cam towards a wedge lock position while a cable normally holds the roller cam in an inactive position. The cable and, therefore, the roller cam are released when the associated door suspension chain breaks. The roller cam, operating between a tilted internal surface in the caliper block and a door guide rail quickly frictionally brakes the door on the guard rail.
REFERENCES:
patent: 316577 (1885-04-01), Schnizlein
patent: 859718 (1907-07-01), Abbott
patent: 1108723 (1914-08-01), Dolph
patent: 1139595 (1915-05-01), Starr
patent: 1707099 (1929-03-01), Stein et al.
patent: 2300630 (1942-11-01), Norton et al.
patent: 2550839 (1951-05-01), Martin
patent: 2618361 (1952-11-01), Zindt
patent: 3215231 (1965-11-01), Lodige
patent: 3447637 (1969-06-01), Berkovitz
patent: 3807091 (1974-04-01), Peelle et al.
patent: 4176826 (1979-12-01), Gray et al.
patent: 4333549 (1982-06-01), Davis
patent: 4696375 (1987-09-01), Matthews et al.
patent: 5224570 (1993-07-01), Fromberg
patent: 5645142 (1997-07-01), Kraemer et al.
patent: 6082506 (2000-07-01), Huang et al.
patent: 6105728 (2000-08-01), Combs, Jr.
patent: 6173813 (2001-01-01), Rebillard et al.
patent: 6206366 (2001-03-01), Schmid
patent: 2003/0051409 (2003-03-01), Bruns
patent: 620 566 (1935-10-01), None
patent: 0 773 181 (1997-05-01), None
Dziwak Zygmunt
Kairis David E.
Lajeunesse Richard W.
Reynolds Steven P.
Kruer Stefan
Matecki Kathy
Pearne & Gordon LLP
The Peelle Company Ltd.
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