Patent ID: 7584677
Filing Date: 2009-09-08
Classification: B60D,B60S,Y10T

Abstract:
1. A screw jack for a trailer hitch comprising a turnkey that can be cranked to raise and lower said screw jack, said turnkey operatively connected to said screw jack, and rotating said screw jack in an operative position, and a locking mechanism operatively connected to said turnkey, said locking mechanism preventing said turnkey from rotating said screw jack when said locking mechanism is in a locked position, and for allowing said turnkey to rotate said screw jack when said locking mechanism is in an unlocked positions, and wherein said locking mechanism comprises a lock, a cam, and a spring-biased plate connected to said screw jack, said cam being operatively connected to said lock, and operatively connected to said spring biased plate, said cam disengaging said turnkey by forcing said spring biased plate to move out of contact with said turnkey.