| 摘要 |
G-2464 - C-4036 SHIPPING DOCK HOOK The present invention provides a truck shipping dock hook system for locking a truck trailer by an ICC bar to a shipping dock. The system includes a hook pivotally mounted to the dock, a pressurized air source, a normally closed first solenoid valve connected with the air source, a tank containing a low temperature fluid connected with the first solenoid valve and a second solenoid valve, a vent connected with the second solenoid valve, and a hydraulic cylinder with a piston rod pivotally connected to the hook for powering the same. |
