Parker-Hannifin Corporation

Bruce E Kohlmeyer

Stanley Paul Evans, Jr

Kevin Koenigs

A cylinder assembly includes a cylinder, a nut and screw assembly, a thrust tube that extends axially from the nut and out the cylinder, a drive assembly mounted to the cylinder for rotating the screw to effect axial translation of the nut relative to the screw, thereby causing the thrust tube to axially extend or retract relative to the cylinder, and an anti-rotate feature for restricting rotation of the nut relative to the cylinder. The anti-rotate feature may include a guide member coupled to the nut and including at least one key on one of the guide member or the cylinder and at least one corresponding slot on the other of the guide member or the cylinder that engages on the key. The guide member may be allowed limited movement relative to the nut and/or the cylinder thereby preventing binding of the nut relative to the cylinder.

Anti-rotate cylinder apparatus

A cylinder for a piston-cylinder assembly comprises an extruded stainless steel cylinder body and stainless steel end caps mounted to opposite ends of the body. A unique configuration of three seals is used to seal each end cap to the cylinder body.

Heavy duty cylinder

A linear device includes a housing supporting a central hydraulic or pneumatic cylinder and a pair of support shafts on either side of the central cylinder. The cylinder includes a longitudinally-moveable piston rod which is attached at its distal end to a tooling plate. An alignment coupler is received within a cavity in the tooling plate, and interconnects the cylinder piston rod and the tooling plate. The alignment coupler includes an annular bearing pad with an inner planar surface disposed adjacent an inner endwall of the cavity, and an outer convex curved surface facing away from the inner endwall. A T-shaped operating rod is disposed within the cavity having an annular shoulder flange with a concave curved inner surface adjacent to the curved surface of the bearing pad, and a convex curved outer surface. An annular bearing washer is disposed in the cavity against the shoulder flange of the operating rod and has a concave curved inner surface adjacent to the convex curved outer surface on the shoulder flange. A threaded end cap is received within the opening to the cavity in the tooling plate, and retains the bearing pad, the operating rod and the bearing washer within the cavity. The end cap includes a central aperture through which the stem of the operating rod extends. The distal end of the operating rod has a threaded opening to receive the threaded end of the cylinder drive piston. The configuration of the adjacent surfaces of the bearing pad, the operating rod shoulder flange, and the bearing washer enables the operating rod to move in rotational and angular relation within the cavity. Moreover, the outer peripheral dimensions of the bearing pad, the operating rod shoulder flange and the bearing washer are less than the inner diameter of the cavity, such that the operating rod can also move laterally between the sidewalls in the cavity.

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Buffalo Grove, IL, United States of America

Bruce E Kohlmeyer