| 摘要 |
A hydraulic latching valve mechanism (48) is provided integral with a control valve (14) to hydraulically hold an actuator (47) in an engaged position (E). This eliminates the need for mechanical detents and/or extra external lines. The valve mechanism (48) has first and second members (58, 66) which cooperate to selectively communicate a fluid chamber (59) with an exhaust port (52) or an inlet port (26) in response to the actuator (47) being moved from a first position (D) to the second position (E). This arrangement is used to maintain a valve spool (30) in a second position for extended periods of time by using the system pressure as the holding force. |
