Fluid powered indexing apparatus

Expansible chamber devices – Mutually relatively movable cylinder or sleeve – member... – Cylinder or sleeve forms working member

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Details

92 85B, 92 53, 92 61, 92 65, 92 66, 92117R, 92165R, 92165PR, 92166, F01B 720, F01B 710, F16J 1518

Patent

active

052555917

ABSTRACT:
An indexing apparatus (10) having a pair of concentric cylinders (12, 14) with the outer concentric cylinder (12) being fixed against longitudinal movement and the inner cylinder (14) mounted for reciprocal movement relative to the fixed outer cylinder (12). A single ram piston (16) is mounted within the inner cylinder (14) and has a piston rod (18) connected to a member (29) for positioning at four predetermined positions. A shock absorber (24) is carried by the outer fixed cylinder (12) and engages stop plates or abutments (20, 28) carried by the inner cylinder (14) for activation of the shock absorber (24). A pair of guide rods (42) prevent rotational movement of inner cylinder (14) relative to the inner cylinder (12) and maintain the shock absorber (24) in axial alignment with the end abutments (20, 28). In one embodiment (FIGS. 9-11), guide rods (41A, 42A) have fluid passages (49A, 53A) in fluid communication with fixed ports (P5, P6) in the outer fixed cylinder (12A) for the supply of fluid to piston chambers (32A, 36A) in the reciprocable inner cylinder (14A).

REFERENCES:
patent: 1845797 (1932-02-01), Kearney
patent: 2490625 (1949-12-01), Hall
patent: 2605750 (1952-08-01), Kupiec
patent: 3015935 (1962-01-01), Evans
patent: 3236620 (1966-02-01), Wiley
patent: 3301196 (1967-01-01), Glas
patent: 3371583 (1968-03-01), Blatt
patent: 3452397 (1969-07-01), Newton
patent: 3892279 (1975-07-01), Amtsberg
patent: 3904416 (1975-09-01), Onoda et al.
patent: 3994539 (1976-11-01), Gottlieb
patent: 4881211 (1989-11-01), Myers
Empress and Associates, Inc. lifter catalogue Aug. 15, 1990.

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