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US 10,633,896 B1Granted
Theft resistant locking device for a roll-up door
OwnerRaul Barbainventor
Life of this patent
Estimating the term…
Abstract
The invention is a locking device for securing roll-up doors on tractor trailers and other cargo vehicles. The working parts of the invention are enclosed inside a housing and the invention employs a dual catch-pin system which allows the door to be locked shut with minimal play between the bottom of the door and loading deck of the cargo vehicle. This, the invention is resistant to attempts to slide pry bars or jacks under the door in force breach attempts.
Claims9
A locking device for a roll-up door on a cargo vehicle, the locking device comprising:
- a catch assembly mounted in a loading deck of said cargo vehicle, said catch assembly further comprising a casing with an upper catch pin and a lower catch pin, said upper and lower catch pins mounted between a pair of sidewalls comprising said casing;
- a housing mounted to said roll-up door on said cargo vehicle, said housing in communication with said catch assembly, said housing containing a plurality of working parts comprising:
- a catch arm, said catch arm being biased by a catch arm spring;
- a latch hook, said latch hook being retained in an open position by said catch arm while said roll-up door is in an open position, said latch hook contacting a pushing arm while said latch hook is being retained in said open position, said pushing arm being biased against said latch hook by a pushing arm spring;
- a hook member being biased by a spring;
- a hook retention member, said hook retention member for both engaging with and disengaging from, said hook member, said hook retention member being in communication with said pushing arm, said hook retention member being disengaged from said hook member when said latch hook is being retained in an open position by said catch arm;
- a locking element operatively connected to said hook member;
- wherein lowering said roll-up door to which said housing is attached first brings said catch arm into contact with said upper catch pin of said catch assembly causing said latch hook to release from its retention position on said catch arm, said latch hook being pushed into an engaged position around said lower catch pin by said pushing arm, said pushing arm further causing said hook retention member to engage said hook member and causing said locking, device to achieve a locked condition;
- and
- wherein said locked condition of said locking device is reset to an open condition by operating said locking element, disengaging said hook member from said hook retention member and moving said hook member back to its retained position in said catch arm.
7 more elements
A locking device for a roll-up door, the locking device comprising:
- a catch assembly mounted flushly in a surface beneath said roll-up door, said catch assembly further comprising a casing with a first catch pin and a second catch pin, said first and second catch pins mounted between a pair of sidewalls comprising said casing, said first catch pin mounted at a different height in said casing than said second catch pin;
- a housing mounted to said roll-up door, said housing in communication with said catch assembly, said housing containing a plurality of working parts, comprising:
- a catch arm, said catch arm being biased to pivot in an arc;
- a latch hook, said latch hook being retained in an open position while said roll-up door to which said housing is attached is in an open position;
- said latch hook communicating with a handle;
- a driving assembly operatively connected to said latch hook;
- a locking assembly operatively connected to said driving assembly;
- and
- a locking element operatively connected to said locking assembly;
- wherein lowering said roll-up door to which said housing is attached first brings said catch arm into contact with said first catch pin causing said latch hook to be released from its retained open position, said latch hook moving into an engaged position around said second catch pin, said locking assembly holding said latch hook and said handle fast in the engaged position around said lower catch pin;
- wherein said locking element operates said locking assembly to an unlocked position, moving said driving assembly and allowing rotation of said handle to cause rotation of said latch hook.
8 more elements
A locking device for a roll-up door on a cargo vehicle, the locking device comprising:
- a catch assembly mounted in a loading deck of said cargo vehicle, said catch assembly further comprising a casing with an upper catch pin and a lower catch pin, said upper and lower catch pins mounted between a pair of sidewalls comprising said casing;
- a housing mounted to said roll-up door on said cargo vehicle, said housing in communication with said catch assembly, said housing containing a plurality of working parts comprising:
- a catch arm, said catch arm being biased by a catch arm spring, said catch arm being pivotally attached at its upper end to said housing;
- a latch hook, said latch hook comprising a keeper, said keeper engaging a notch in said catch arm and being retained by said catch arm while said roll-up door is in an open position, said latch hook contacting a pushing arm, said pushing arm being biased against said latch hook by a pushing arm spring, said pushing arm providing a pushing force urging said latch hook rotationally in the direction of said catch arm;
- a hook member, said hook member including a beveled side:
- a hook retention member, said hook retention member for both engaging with and disengaging from said hook member, said hook retention member being in communication with said pushing arm, said hook retention member being disengaged from said hook member when said latch hook is being retained by said catch arm;
- a handle in rotational communication with said latch hook;
- a locking element operatively connected to said hook member;
- wherein lowering said roll-up door mounting said housing first brings said catch arm into contact with said upper catch pin of said catch assembly causing said latch hook to release from its retention position on said catch arm, said latch hook being pushed toward said catch arm into an engaged position around said lower catch pin by said pushing arm;
- and
- wherein hook member engages said hook retention member when said latch hook engages said lower catch pin, effectively locking said locking device upon fully lowering said roll-up door mounting said locking device;
- and
- wherein said locking element operates said locking assembly to an unlocked position, moving said driving assembly and allowing rotation of said handle to cause rotation of said latch hook.
10 more elements
Dependencies are inferred from the claim text.