Drain construction

Claim 1

A TRENCH DRAIN CHANNEL ELEMENT ADAPTED IN FORM FOR LAYING A PLURALITY OF SAID ELENENTS IN END-TO-END RELATION TO FORM A DRAINAGE CHANNEL OF SUBSTANTIALLY CONTINUOUS INTERNAL SURFACE AND OF IDENTICAL TRANSVERSE CROSS SECTION, AND PROVIDING ON OPPOSITE SIDES ABOVE SAID SURFACE OPPOSED PARALLEL EDGE FORMATIONS, SAID CHANNEL ELEMENT COMPRISING: AN ELONGATED BODY PORTION OF GENERALLY UPWARDLY OPEN CHANNEL FROM WITH OPPOSITE SIDES TERMINATING IN PARALLEL UPPER LONGITUDINAL EDGE PORTIONS AND AT OPPOSITE ENDS RESPECTIVELY AN INTEGRAL FEMALE END FORMATION AND AN INTEGRAL MALE END FORMATION OF GENERALLY COMPLEMENTARY FORM WHEREBY A MALE END FORMATION OF ONE CHANNEL ELEMENT MAY BE RECEIVED IN A COMPRESSION SEALED AND INTERLOCKED JOINED RELATION WITH THE FEMALE END FORMATION OF AN ADJACENT CHANNEL ELEMENT; SAID MALE END FORMATION COMPRISING AN INTEGRAL EXTERNAL V-SHAPED FLANGE WITH UPPER ENDS TERMINATING AT RESPECTIVE EDGE PORTIONS ON THE SAID OPPOSITE SIDES, AND AN INTEGRAL ENDWISE EXTENSION ON EACH SIDE PROVIDING CONTINUATIONS OF THE EDGE PORTIONS; SAID FEMALE END FORMATION INCLUDING AN INTEGRAL ENDWISE PROJECTING EXTERNAL ENLARGEMENT HAVING A VSHAPED INNER FACE OUTWARDLY OFFSET FROM THE INTERNAL SURFACE OF THE BODY PORTION AND HAVING IN SAID INNER FACE AN INTERNAL GROOVE COEXTENSIVE IN LENGTH WITH THE ENLARGEMENT, AND SEAT FORMATIONS ON THE UPPER ENDS OF SAID ENLARGEMENT ADAPTED TO RECEIVE AND SEAT THEREIN THE RESPCTIVE EXTENSIONS OF A MALE END FORMATION OF AN ADJACENT COOPERATING LIKE CHANNEL ELEMENT WITH THE RESPECTIVE COOPERATING LIKE CHANNEL THE SAID INTERNAL SURFACES OF THE JOINED ELEMENTS IN SUBSTANTIAL ALIGNMENT; THE BOTTOM OF SAID GROOVE BEING SPACED FROM THE INTERNAL SURFACE OF THE BODY PORTION A GREATER DISTANCE THAN THE SPACING OF THE OUTER EDGE OF SAID INTEGRAL FLANGE FROM THE INTERNAL SURFACE WHEREBY THE SAID GROOVE IS ADAPTED TO RECEIVE FIRST A COMPRESSIBLE GASKETING STRIP AND THEN THE EXTERNAL FLANGE OF A MALE END FORMATION RECEIVED COOPERATIVELY IN THE FEMAL END FORMATION AND SEATED ON THE STRIP WHEN SAID EXTENSIONS OF A MALE END FORMATION ARE SEATED IN SAID SEAT FORMATIONS OF THE FEMALE END FORMATION; SAID EXTENSIONS AND SAID SEAT FORMATIONS HAVING COMPLEMENTARILY LOCATED APERTURES WHEREBY THE EXTENSIONS OF ONE CHANNEL ELEMENT FORMING A JOINT WITH THE FEMALE FORMATION OF AN ADJACENT COOPERATING CHANNEL ELEMENT MAY BE BROUGHT INTO ALIGNMENT AND SEATED RELATION BY INSERTION OF THE MALE END FORMATION FROM ABOVE TO RECEIVE LOCKING BOLTS FOR SECURING THE ELEMENTS TOGETHER IN A VERTICALLY WEDGING COMPRESSION JOINT STRUCTURE WITH THE INTERNAL SURFACES OF THE JOINED CHANNEL ELEMENTS IN SUBSTANTIAL ALIGNMENT.