Elevator – industrial lift truck – or stationary lift for vehicle – Having fluid dampening means regulating load support movement – Includes piston and cylinder attached to support by cable
Patent
1995-03-17
1996-08-27
Noland, Kenneth
Elevator, industrial lift truck, or stationary lift for vehicle
Having fluid dampening means regulating load support movement
Includes piston and cylinder attached to support by cable
187406, B66B 500
Patent
active
055491804
ABSTRACT:
An escape apparatus is designed for placement adjacent to an exterior entrance of a multi-story residence or other building. The escape apparatus includes an escape platform and cage which is attached to and supported by a sleeve which extends around the periphery of a vertically oriented stationary hollow column. The sleeve is movable upward and downward along the column exterior. A pair of cables are connected to the sleeve and extend from the sleeve upward and over a respective pair of sheaves positioned atop the vertical column and then into the column interior where they are connected to a speed control piston-counterweight. The column is preferably filled with liquid, such as a water and anti-freeze mixture, and the piston-counterweight has an aperture extending therethrough from top to bottom to allow liquid to flow from one side of the piston-counterweight to the other and a valve operating within the aperture to further regulate the rate of ascent of the piston-counterweight. The piston-counterweight more than offsets the empty weight of the escape platform, cage and sleeve so that the escape platform is automatically returned from the bottom of the column to an elevated position atop the column after it is emptied.
REFERENCES:
patent: 635679 (1899-10-01), Forbes
patent: 780249 (1905-01-01), Withey
patent: 912560 (1909-02-01), Groom
patent: 1078998 (1913-11-01), Ernst
patent: 2222685 (1940-11-01), Raymond
patent: 2646964 (1953-07-01), Andrews
patent: 3261590 (1966-07-01), Bech et al.
patent: 4488621 (1984-12-01), Schiewe
C. Calvin Hansen Trust U/A
Noland Kenneth
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