Trailer coupling device

Details Trailer coupling device Trailer coupling device

1989-09-26

1991-03-19

Marmor, Charles A.

Land vehicles

Wheeled

Articulated vehicle

280511, 403317, B60D 152

Patent

active

050004743

ABSTRACT:
A locking device at a trailer coupling, including a first part (1), which is adapted to be attachable to a towing vehicle, and a second part (2), which is adapted to be coupled to a trailed vehicle and to be releasably attachable to the first part (1). The first part (1) includes an opening (8), into which the second part (2) is introducable, and a locking bolt (10), which is displaceable in its axial direction into the opening (8) in the first part (1) to lock the second part (2) by engagement in a locking recess (11) therein in the position thereof where it is introduced in the opening (8) of the first part (1). The locking bolt (10) is urged by a spring (20) in a direction towards the opening (8) in the first part and manually operable in the opposite direction. The locking bolt (10) is also adapted to be positively displaceable in a direction into the opening (8) in the first part (1) as well as out of the opening by screwing motion between co-acting first and second threads (33,32, respectively) associated with the first part (1) and the locking bolt (1), respectively, said threads (32,33) being arranged such that their co-action ceases after a certain displacement of the locking bolt (10) in the latter direction and the locking bolt (10) becomes displaceable independently of the threads (32,33) against the action of the spring (20).

REFERENCES:
patent: 4807899 (1989-02-01), Belcher

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