| 摘要 |
A lock for holding a boom in a storage position on a boom support is disclosed herein. The lock consists of a first member or vertical pin that is carried by the boom support, a second member or locking ring that is pivoted on the boom about a horizontal axis and that has an opening for receiving the first member, and a deformable biasing element or spring interconnecting the first and second members. The second member is biased to a first position by the spring and engages the vertical pin when the boom is moved to its storage position. When the opening in the locking ring and the vertical pin are axially aligned, the spring returns the second member to the first position latching the first and second members together.
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