Metal working – Method of mechanical manufacture – Shaping mating parts for reassembly in different positions
Patent
1975-03-12
1976-10-19
Lanham, C.W.
Metal working
Method of mechanical manufacture
Shaping mating parts for reassembly in different positions
29252, 254 93HP, B23P 1902
Patent
active
039862461
ABSTRACT:
A hydraulic extractor and its use in removing damaged draft gear which are wedged in railway cars. It consists of a length of pressure resistant hose folded at its center to lie flat upon itself when empty, and having connections at both ends for receiving hydraulic fluid under pressure. Also included is an arrangement for feeding the hose into the restricted space above the draft yoke and below the draft sill. That arrangement comprises a pair of strips of sheet metal of a width generally the same as that of the flat hose, and means connecting the strips together at one end. The hose is placed between the strips, with the fold near the connecting means. A rudimentary winch is provided for connection by a cable to the metal strips where they are connected. In use, the cable is fed through the space to be expanded, and connected to the winch, and the hose in its protective metal strips is winched into the desired location. When hydraulic fluid under pressure is forced into the hose at both ends, it expands laterally, driving the draft yoke and draft gear downward and out of the pocket.
REFERENCES:
patent: 1981666 (1934-11-01), Ridley
patent: 2226201 (1940-12-01), Freyssinet
patent: 3026541 (1962-03-01), Murat
patent: 3822861 (1974-07-01), Scott
Burlington Northern Inc.
Duzan James R.
Lanham C.W.
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