Power cylinder apparatus for supplying varying actuation forces

Details Power cylinder apparatus for supplying varying actuation forces Power cylinder apparatus for supplying varying actuation forces

2005-05-24

2005-05-24

Lopez, F. Daniel (Department: 3745)

Expansible chamber devices

Mutually relatively movable cylinder or sleeve, member...

Cylinder or sleeve forms working member

C092S062000

Reexamination Certificate

active

06895854

ABSTRACT:
The present invention relates to a power cylinder apparatus for varying actuation forces applied to a workpiece. The present invention provides an enclosure having a piston rod connectable to a workpiece and slidably disposed within an enclosure. The piston rod moves between a retracted position, wherein the piston rod is retracted within the enclosure, and an extended position, wherein the piston rod extends outwardly from the enclosure. A piston is slidably disposed on the piston rod for movement between the retracted position and the extended position. A bushing is provided within the enclosure for slidably supporting the piston rod and positively stopping the piston in the extended position. The piston rod and piston have varying surface areas substantially perpendicular to the direction of movement such that varying actuation forces may be provided to the workpiece through a supply of a constant fluid pressure.

REFERENCES:
patent: 787479 (1905-04-01), Tanner
patent: 2764131 (1956-09-01), Knights
patent: 3269275 (1966-08-01), Waite
patent: 3499369 (1970-03-01), Joseph
patent: 4011724 (1977-03-01), Landes et al.
patent: 4205594 (1980-06-01), Burke
patent: 4561248 (1985-12-01), Quin et al.
patent: 5009068 (1991-04-01), Clarke
patent: 5165322 (1992-11-01), Moody

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