Adjustable portable strike-off

Claim 1

A CONCRETE FINISHING TOOL ADAPTED FOR USE IN FINISHING A RELATIVELY LARGE BODY OF CONCRETE POURED BETWEEN OPPOSED SPACED FIXED FORMS AND ADAPTED TO EXTEND ACROSS THE CONCRETE AND REST UPON SAID FORMS, SAID TOOL COMPRISING AN ELONGATED BEAM FORMED WITH A CONTINUOUS PLANAR BOTTOM SURFACE OF UNIFORM WIDTH THROUGHOUT THE LENGTH OF THE BEAM, THE EDGE OF SAID SURFACE DEFINING FORWARD AND REARWARD FACES OF SAID BEAM, A FIRST ELONGATED RIGID TRUSS MEMBER HAVING ONE OF ITS ENDS MADE FAST TO ONE END OF SAID BEAM, A SECOND ELONGATED RIGID TRUSS MEMBER HAVING ONE OF ITS ENDS MADE FAST TO THE OTHER END OF SAID BEAM, SAID MEMBERS BEING SUBSTANTIALLY EQUAL IN LENGTH AND HAVING COMBINED A LENGTH THAT IS GREATER THAN THE LENGTH OF SAID BEAM, SAID MEMBERS HAVING THEIR OTHER ENDS JOINED TOGETHER OVER THE CENTRAL PORTION OF THE BEAM TO FORM A TRUSS STRUCTURE, A RIGID UPRIGHT STRUT MADE FAST BETWEEN SAID JOINED TOGETHER ENDS OF SAID MEMBERS AND SAID BEAM AND INCLUDING JACK MEANS FOR ADJUSTING THE EFFECTIVE LENGTH OF SAID STRUT WHEREBY THE CONTOUR OF SAID BEAM MAY BE ADJUSTED, AN ELONGATE HANDLE PIVOTALLY SECURED TO SAID BEAM ON EACH SIDE OF SAID STRUT AND SUBSTANTIALLY MIDWAY BETWEEN SAID STRUT AND ONE OF THE ENDS OF SAID BEAM, EACH OF SAID HANDLES PROJECTING LATERALLY FROM SAID BEAM AND BEING MOUNTED ON THE FORWARD SIDE OF SAID BEAM FOR PIVOTAL MOVEMENT ABOUT A HORIZONTAL AXIS EXTENDING LENGTHWISE OF SAID BEAM, VIBRATOR MEANS MOUNTED ON SAID BEAM ADJACENT EACH OF SAID HANDLES FOR VIBRATING SAID BOTTOM SURFACE, A PAIR OF TIE ROD MEANS EACH CONNECTED AT ONE OF ITS ENDS OF SAID BEAM ADJACENT SAID VIBRATOR MEANS AND HAVING ITS OTHER END CONNECTED TO SAID TRUSS STRUCTURE ADJACENT SAID JOINED TOGETHER ENDS OF SAID MEMBERS, SAID TIE ROD MEANS BRACING SAID BEAM PORTIONS AGAINST UNCONTROLLED VIBRATION AND THEREBY SPREADING OUT THE VIBRATION GENERATED BY SAID VIBRATOR MEANS SUBSTANTIALLY UNIFORMLY ALONG THE LENGTH OF THE BEAM, AND MEANS FOR RELEASABLY SECURING SAID HANDLES AGAINST PIVOTAL MOVEMENT AT SELECTED FORWARDLY DIRECTED POSITIONS OF INCLINATION WITH RESPECT TO SAID BEAM WHEREBY A WORKER MAY ADJUST A HANDLE TO HIS PARTICULAR HEIGHT, SAID BEAM BEING FORMED WITH AN UPWARDLY FACING PLANAR SIGHT GUIDE SURFACE MEANS ALONG SAID FORWARD FACE THEREOF FOR ACTING AS A GUIDE FOR POSITIONING AND LEVELING CONCRETE IN ADVANCE OF SAID BEAM DURING OPERATION THEREOF, WITH SAID SIGHT GUIDE SURFACE MEANS BEING IN PARELLEL RELATION WITH AND ABOVE SAID BOTTOM SURFACE OF SAID BEAM, WHEREBY EACH OF TWO WORKERS STANDING IN THE POURED CONCRETE AND GRASPING A HANDLE MAY ADJUST SAID HANDLE TO HIS PARTICULAR HEIGHT AND, WHEN DRAWING THE BEAM ALONG THE OPPOSED FORMS IN A FORWARD DIRECTION AND OVER THE CONCRETE AS SAID BOTTOM SURFACE IS VIBRATED TO FINISH THE SURFACE OF THE POURED CONCRETE, AVOID TWISTING OF SAID SIGHT GUIDE SURFACE MEANS.