1
Douglas A Callison: Trailer hitch lock. Kent A Herink, G Brian Pingel, October 4, 1988: US04774823 (45 worldwide citation)

A hitch lock for disabling hitching couplers of trailer vehicles. A reversible keeper member includes a base portion and an extended portion projected forwardly from the base portion at an obtuse angle. The base portion includes an aperture through which is inserted an ear that is mounted on a tongu ...


2
Walter C Avrea, William C Neils: Trailer hitch lock. Cahill Sutton & Thomas, July 17, 1984: US04459832 (40 worldwide citation)

A pivotally mounted coupling guard, extending over a ball engaging socket of a trailer hitch to preclude disengagement of the socket from the ball, is locked in place to deter unauthorized disengagement of the socket from the ball and theft of the attached trailer. A lock module penetrably receives ...


3
Vuillemot Dale F: Trailer hitch lock. Gifford Ernest I, May 20, 1975: US3884055 (40 worldwide citation)

A theft deterrent trailer hitch lock device to lockably obstruct the socket portion of a trailer hitch, the device having an elongated plate which closes at least a portion of the opening into the socket, a plug which is inserted into the trailer hitch socket and a bar which can be positioned over t ...


4
Michael F Farquhar: Trailer hitch lock. Jones & Askew, July 26, 1994: US05332251 (35 worldwide citation)

A trailer hitch lock assembly for disabling the trailer hitch of an unattached trailer to prevent theft of the trailer. The trailer hitch lock obstructs access to the trailer eyelet in the drawbar of the trailer hitch to prevent unauthorized hitching of the trailer to a truck with a military hitch. ...


5
William R Bratzler: Trailer hitch lock. Dowell & Dowell, February 25, 1986: US04571964 (31 worldwide citation)

A locking assembly to prevent unauthorized access to a trailer hitch which includes a metallic casing which is slideably placed over and around the socket end portion of the hitch and which cooperatively receives a locking bar having a first extended portion which is receivable within the hitch sock ...


6
Fred J Sellers: Trailer hitch lock. Pitts & Brittian P C, July 7, 1998: US05775139 (29 worldwide citation)

A trailer hitch lock for enclosing a trailer hitch to secure the trailer against theft. The trailer hitch lock includes a base plate, a set of locking plates pivotably mounted to opposing sides of the base plate and a locking mechanism for securing the locking plates together. A mounting ball is mou ...


7
Cloy L Allen, Bobby L Hook: Trailer hitch locking device. Robert K Rhea, June 28, 1977: US04032171 (29 worldwide citation)

A theft deterrent trailer hitch lock to obstruct removal of the socket portion of a trailer hitch from engagement with a trailer hitch ball mounted on a tow bar secured to a towing vehicle. The device includes a right angular-shaped base having a first flange underlying the hitch ball and bolted to ...


8
Longenecker Ernst A: Trailer hitch lock. December 25, 1973: US3780546 (26 worldwide citation)

An anti-theft device securable by a key controlled lock to the coupler on the front end of a trailer to obstruct access to the socket of the coupler and thereby prevent insertion of the ball of a ball and socket connection by which the trailer can be coupled to a towing vehicle. A cover member slips ...


9
Marshall Bulle, Dale A Johnson: Trailer hitch lock. Donald A Jacobson, September 29, 1981: US04291557 (25 worldwide citation)

An anti-theft device secured by sliding the device over a ball-connector type trailer hitch which automatically engages the hitch by means of a spring loaded bolt, to obstruct access by the ball and prevent unauthorized use of the trailer. The device is removed by retracting the bolt using only a co ...


10
Marshall R Bulle, Dale A Johnson: Trailer hitch lock. Donald A Jacobson, April 15, 1986: US04581908 (18 worldwide citation)

A lock has a base with lip extensions which fit about the flange extensions of a ball hitch receptacle to cover the ball receptacle opening. The base is secured by a spring loaded latch having a ramp-shaped upper surface which is forced downward by a flange of the ball receptacle bearing against the ...