Railways – Cable rails – Hangers and saddles
Patent
1990-06-06
1992-03-10
Oberleitner, Robert J.
Railways
Cable rails
Hangers and saddles
182 10, 182193, 188 651, B61B 700, E01B 2516
Patent
active
050941712
ABSTRACT:
A platform escape vehicle, particularly for rapid escape of a derrickman from his monkey-board on a drilling rig, consisting of two sheaves with double grooves mounted on parallel shafts, to take a wire rope, one sheave being provided with a dynamic brake and the other sheave being provided with hand-operated shoe brake; the sheaves being connected by parallel supporting straps, the sheaves plus aforesaid supporting straps together being connected to the mid-point of the body of the vehicle which is made up of two like-shaped pieces consisting of upper supports from one end of the pieces tubular members run towards one another and around the bottom of a seat and from the other end of which tubular members run down to practically meet at the mid-point of handle-bars which are provided with levers for hand-operation of shoe brake, from the meeting point of the tubular members springs another tubular member that curves outward while running down through a hole at the forward end of the seat until the end thereof becomes an inverted T shape.
REFERENCES:
patent: 416220 (1889-12-01), Grinnell
patent: 666879 (1901-01-01), White
patent: 960068 (1910-05-01), Brown
patent: 3040678 (1962-06-01), McEwen
patent: 3827368 (1974-08-01), Garnier
patent: 4773510 (1988-09-01), Sato
patent: 4934277 (1990-06-01), Smith et al.
Morano S. Joseph
Oberleitner Robert J.
Petroleo Brasileiro S.A.
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