Blinding tool for drain tiles and the like

Claim 1

A TILE BINDING TOOL COMPRISING: (A) AN ELONGATED RIGID FRAME STRUCTURE HAVING FRONT AND REAR ENDS, (B) ATTACHING MEANS ON THE FRONT END OF SAID FRAME STRUCTURE FOR ATTACHING SAID FRAME STRUCTURE TO THE REAR END PORTION OF A TRENCH DIGGING MACHINE FOR TRAILING MOVEMENTS OF SAID FRAME STRUCTURE BETWEEN THE SIDE WALLS OF A TRENCH MADE BY SAID MACHINE, (C) A PAIR OF BLADES NORMALLY DISPOSED IN VERTICAL PLANES DIVERGING IN THE GENERAL DIRECTION OF SAID ATTACHING MEANS, (D) A PAIR OF RIGID BLADE-CARRYING ARMS PROJECTING LATERALLY OUTWARDLY IN OPPOSITE DIRECTIONS FROM THE REAR END PORTION OF SAID FRAME STRUCTURE AND EACH OF SAID ARMS HAVING A DIFFERENT ONE OF SAID BLADES RIGIDLY SECURED TO THE OUTER END THEREOF, (E) ARM MOUNTING MEANS MOUNTING SAID ARMS IN SAID FRAME STRUCTURE FOR EXTENSIBLE AND RETRACTABLE MOVEMENTS OF SAID ARMS TRANSVERSELY OF SAID FRAME STRUCTURE TO VARY THE DISTANCE BETWEEN SAID BLADES, (F) AND A PAIR OF RELEASABLE LOCKING ELEMENTS EACH OPERATIVELY ENGAGING A DIFFERENT ONE OF SAID ARMS TO RIGIDLY LOCK SAID ARMS TO SAID ARM MOUNTING MEANS IN DESIRED ADJUSTED POSITIONS THEREOF, WHEREBY TO MAINTAIN THE LATERAL SPACING THEREBETWEEN.