Copyright Goodheart-Willcox Co., Inc.
Chapter 6 Cylinders 139
Cushion adjustment
Check valve
Plunger
Gland
Plunger
Piston Cushion adjustment Gland
Check valve
Figure 6-21. A cushioned cylinder consists of a plunger that blocks off the cylinder’s oil flow as the cylinder reaches
the end of travel, which slows the cylinder as it reaches its end of travel. A—Cross-sectional drawing of a cushioned
cylinder. B—Cutaway of a cushioned cylinder.
Figure 6-22. The schematic shows that the cylinder contains a cushion in both directions, an orifice in both directions,
and pilot-operated check valves in both directions. Pilot-operated check valves will be detailed in Chapter 7.
B
A