| 摘要 |
A load-clamping apparatus wherein the loaded and unloaded condition of the clamping arms (respecting their contacting an external body) is automatically sensed, and used to determine the type of fluid connections which exist at any given moment between fluid motors that move the arms. With the arms moving toward one another, so long as the movement of neither arm is hindered by an external body, a series connection exists between the motors producing relatively high-speed low-power relative movement between the arms. When such hindering occurs, a parallel connection is produced which results, during clamping, in lower-speed higher-power relative movement between the arms. |
