Shifting apparatus for a drawworks transmission

Details Shifting apparatus for a drawworks transmission Shifting apparatus for a drawworks transmission

1985-04-12

1987-08-04

Bonck, Rodney H.

192 clutches and power-stop control

Transmission control and clutch control

Common control

192 8719, 192114R, 192 0094, 254311, 254317, F16D 6704, F16D 4706

Patent

active

046839941

ABSTRACT:
Drawworks transmission shifting apparatus is described that provides an arrangement of control valves, cylinders, clutches and brakes which permit the rig operator to shift the drawworks transmission into the desired setting and to lock the transmission in those positions by the use of remotely controlled pneumatically powered cylinders.

REFERENCES:
patent: 2092580 (1937-09-01), Kelley
patent: 2180154 (1939-11-01), Lenz
patent: 2315157 (1943-03-01), Maier
patent: 2398407 (1946-04-01), Brownyer
patent: 2703161 (1955-03-01), Keim et al.
patent: 2703162 (1965-03-01), Keim et al.
patent: 2785783 (1957-03-01), Homrig et al.
patent: 2832234 (1958-04-01), Sinclair
patent: 3001413 (1961-09-01), Burckhardt
patent: 3244404 (1966-04-01), Bender
patent: 3459285 (1969-08-01), Lamburn et al.
patent: 4232564 (1980-11-01), Yamasaki
patent: 4429591 (1984-02-01), Zuch et al.

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