Securing support for truck trailers

Claim 1

A SUPPORT DEVICE FOR TRUCK TRAILERS COMPRISING A SUBSTANTIALLY RECTANGULAR PLATFORM HAVING AN UPPER FACE, A LOWER FACE, AND A PLURALITY OF DOWNWARDLY DEPENDING SIDES, SAID PLATFORM PROVIDED WITH AN INWARDLY EXTENDING AND INWARDLY TAPERING FIRST LATERAL RECESS AND A SECOND INWARDLY EXTENDING RECESS ABUTTING SAID FIRST-NAMED RECESS, SAID SECOND RECESS HAVING AN ARCUATE INNER FACE; ONE SIDE SAID PLATFORM BEING ALSO PROVIDED WITH A DOWNWARDLY DEPENDING CUT-OUT PORTION ADJACENT THE WIDEST PORTION OF SAID FIRST-NAMED RECESS, THE SIDE OF SAID PLATFORM ADJACENT TO SAID SIDE CARRYING SAID CUT-OUT PORTION PROVIDED WITH AN OPENING WITHIN AN INTERMEDIATE PORTION THEREOF; A BLOCK MEMBER SECURED TO THE LOWER FACE OF SAID PLATFORM SAID BLOCK MEMBER PROVIDED WITH A THIRD INWARDLY EXTENDING LATERAL RECESS, SAID THIRD RECESS HAVING AN ARCUATE INNER FACE, BEING IN REGISTRATION WITH SAID SECOND INWARDLY EXTENDING RECESS AND ADAPTED TO ACCOMMODATE THE KINGPIN OF A TRUCK TRAILER, SAID BLOCK MEMBER BEING ALSO PROVIDED WITH A PAIR OF ALIGNED FOURTH AND FIFTH RECESSES EXTENDING THERETHROUGH AND ON OPPOSITE SIDES OF SAID THIRD RECESS; A SLIDABLY MOVABLE SECURING MEMBER DISPOSABLE WITHIN SAID FOURTH AND FIFTH RECESSES AND WITHDRAWABLE AND EXTENDABLE ACROSS SAID THIRD RECESS SO AS TO RELEASABLY SECURE SAID KINGPIN IN POSITION, A SLIDABLY MOVABLE ARM MEMBER CONNECTED TO SAID SECURING MEMBER AND EXTENDING THROUGH SAID OPENING WITHIN SAID PLATFORM SIDE, STOP MEANS UPON SAID ARM MEMBER ADAPTED TO SELECTIVELY RETAIN SAID SECURING MEMBER IN SAID WITHDRAWN AND SAID EXTENDED POSITION, A DOWNWARDLY DEPENDING LEG MEMBER CONNECTED TO EACH CORNER OF SAID PLATFORM, A PLURALITY OF CROSS-MEMBERS EXTENDING BETWEEN A PAIR OF LEG MEMBERS, AND A DEVICE TRANSPORTING PIN MEMBER DOWNWARDLY DEPENDING FROM THE LOWER FACE OF SAID PLATFORM OPPOSITE SAID SECOND RECESS AND SPACED THEREFROM.