Latch mechanism

Claim 1

A LATCH COVER FOR DETACHABLY INTERCONNECTING ADJACENT EDGE PORTIONS OF A CONTAINER AND COVER THEREFOR, SAID CONTAINER AND COVER HAVING OPPOSED HORIZONTAL FLANGE PORTIONS AND A COMPRESSIBLE GASKET THEREBETWEEN, SAID LATCH DEVICE COMPRISING A BASE PLATE SECURED TO THE EDGE OF SAID CONTAINER, A CAM ROTATABLY MOUNTED ON SAID BASE PLATE AND HAVING A DOWNWARDLY DIRECTED NOSE PORTION, A KEEPER EXTENDING DOWNWARDLY FROM SAID COVER AND EXTENDING THEREFROM WHEN SAID COVER IS IN CLOSED POSITION ALONGSIDE SAID BASE PLATE AND BEING GUIDED THEREBY, SAID KEEPER HAVING A LAND PORTION IN ALIGNMENT WITH DOWNWARD MOVEMENT OF THE NOSE PORTION OF SAID CAM, A LINK MEMBER PIVOTALLY CONNECTED AT ONE END TO SAID CAM, A LATCH CONTROL LEVER PIVOTALLY CONNECTED AT ONE END TO CAM, A LATCH CONTROL LEVER PIVOTALLY CONNECTED AT ONE END TO SAID BASE PLATE AT A POSITION OFFSET FROM THE CENTER OF ROTATION OF SAID CAM, AND PIVOTALLY CONNECTED AT A POSITION OFFSET FROM THE AXIS OF ITS CONNECTION TO SAID BASE PLATE, TO THE OTHER END OF SAID LINK, SAID BASE PLATE HAVING EXTENDING FLANGE PORTIONS AND A COVER MEMBER SNAP-FITTED THEREON THEREBY SUBSTANTIALLY ENCLOSING SAID CAM AND LINK MEMBER, AND SAID LEVER MEMBER BEING FORMED WITH A LATERAL FLANGE AND HAVING A BOX-SHAPED COVER MEMBER ATTACHED THERETO THEREBY PROVIDING A SMOOTH SURFACED HANDLE DEVICE FOR SAID CONTROL LEVER SIMULATING IN APPEARANCE THE COVER DEVICE FOR SAID BACK PLATE, THE PARTS BEING SO DIMENSIONED AND ARRANGED THAT WHEN SAID HANDLE MEMBER IS PULLED UPWARDLY INTO HORIZONTAL ALIGNMENT BENEATH THE EDGE OF SAID COVER MEMBER, THE NOSE PORTION OF SAID CAM DRAWS SAID KEEPER DOWNWARDLY INTO GASKET COMPRESSING POSITION WHILE SAID LINK ASSUMES A "PAST-CENTER" POSITION RELATIVE TO THE AXIS OF PIVOTING OF SAID CONTROL LEVER ON SAID BASE PLATE, THEREBY LOCKING SAID LATCH DEVICE IN HOLDING POSITION.