| 摘要 |
A lightweight, portable hoisting apparatus which is easily securable into a standard receiver hitch of a truck or other vehicle which can be used for hoisting heavy objects such as motor vehicle engines and the like, a vertically extendable main support member preferably formed of box tubing is included which is obliquely oriented with respect to the ground at 70-90 degrees. A mounting head is slidably engageable with respect to the lower portion of the main support member and includes a mounting housing defining a vertical channel therein for receiving the main support member and a mounting arm extending outwardly to engage the vehicle hitch. A boom arm is pivotally mounted to the upper end of the main support member and includes a load attachment means preferably at the outermost end thereof. Powering of the boom arm is achieved by a cylinder or other similar longitudinally extendable means which is pivotally secured at an intermediate location with respect to the main support member as well as being pivotally secured at an intermediate location with respect to the boom arm. The mounting arm may be angularly oriented with respect to the mounting head to orient the main support member obliquely with respect to the ground.
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