Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1990-01-22
1991-01-15
Skaggs, H. Grant
Elevator, industrial lift truck, or stationary lift for vehicle
Stationary lift for roadway vehicle or required component...
Having specific drive means for support
187 51, 187 52R, 187104, 49 25, B66B 1324
Patent
active
049846582
ABSTRACT:
The invention provides a scanning beam along the forward edge of an elevator car closure which leads the edge a predetermined distance to provide sufficient time when an object interrupts the beam to stop or reverse the closure and which retracts relative to the closure during final closing movement to dwell adjacent the line at which the closure forward edge closes.
REFERENCES:
patent: 1142405 (1915-06-01), Derry
patent: 4621452 (1986-11-01), Deeg
patent: 4794248 (1988-12-01), Gray
Chang I-Lin
Peelle, Jr. H. E.
Walkowiak Stefan
Reichard Dean A.
Skaggs H. Grant
The Peelle Company
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