Motors: expansible chamber type – Relatively movable working members with one having motive... – Moving cylinders
Patent
1987-08-31
1988-06-07
Look, Edward K.
Motors: expansible chamber type
Relatively movable working members with one having motive...
Moving cylinders
91419, 92110, 92117A, F01B 1500
Patent
active
047488930
ABSTRACT:
Piston rods (60, 62) of three linear hydraulic motors (36, 38, 40) are connected at their outer ends (64, 68) to two spaced apart transverse frame members (10, 12). A cylinder housing (72) is driven back and forth along each pair of piston rods (60, 62). Three transverse drive beams (48, 50, 52) are provided. Each drive beam (48, 50, 52) is directly connected to an associated one of the cylinder housings (72). Three sets of floor slat members (1, 2, 3) are provided. Each set (1, 2, 3) is connected to an associated one of the transverse drive beams (48, 50, 52). The linear hydraulic motors (36, 38, 40) are operated for moving the floor slat members (1, 2, 3) in one direction, for advancing a load, and for retracting them in the opposite direction. Each cylinder housing (72) has four fluid chambers (82, 84, 86, 88). The first and third chambers (82, 86) are interconnected and the second and fourth chambers (84, 88) are interconnected. This arrangement provides adequate force producting area with a relatively small diameter cylinder housing (72). Fluid passageways (110, 112) are formed in the piston rods (60, 62). Transfer valves (138, 140) and U-shaped tubes (134, 136, 126, 128) are clamped onto the outer end portions of the piston rods (60, 62) by means of a pair of clamp plates (190, 192, 214, 224) and interconnecting nut and bolt assemblies (194, 226).
REFERENCES:
patent: 2550925 (1951-05-01), Weimar
patent: 2922399 (1960-01-01), Panissidi et al.
patent: 3146678 (1964-09-01), Strick
patent: 4143760 (1979-03-01), Hallstrom
patent: 4344354 (1982-08-01), Suessenbeck et al.
patent: 4712467 (1987-12-01), Foster
Barnard Delbert J.
Look Edward K.
Williamson Mark A.
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