| 摘要 |
A wheel chock contains a first wheel-restraining member, a frame with a gear rack attached to the first wheel-restraining member, a second wheel-restraining member, a gear assembly attached to the second wheel-restraining member, and an elongated handle member. The gear assembly has a gear housing with an opening through which the frame passes and also has a releasably ratcheting pinion gear that engages the gear rack. A user holding the handle member from a standing position can restrain a wheel by moving the wheel chock into position on the wheel and then reducing the distance between the first and second wheel-restraining members so they touch the wheel, and can release the wheel by increasing the distance between the first and second wheel-restraining members and then removing the wheel chock.
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