Rotary power trowel

In a rotary powered trowel having prime mover means, a troweling blade assembly, drive means interconnecting the prime mover means and blade assembly to rotate said blade assembly, and handle means connected to said trowel to enable an operator to manipulate and control the trowel, that improvement comprising said troweling blade assembly including support means connected with and driven by the drive means, said support means including a plurality of sleeves, a blade support arm mounted in each of the sleeves and projecting outwardly therefrom for angular movement about the longitudinal axis of the blade support arm, a longitudinally elongated blade attached to each blade support arm, and means connected with each blade support arm to tilt the blade support arm and blade to vary the pitch of the blade, said means for tilting the blade including an offset lug attached to each blade supporting arm outwardly of the sleeve, a vertically movable thrust plate disposed above the support sleeves for the blade support arms, connecting rods universally, adjustably and positively connecting the thrust plate and lugs, a thrust bearing engaged with the thrust plate, and means operative from the handle means remote from the prime mover means to apply downward thrust on said thrust bearing, thrust plate and lugs to vary the pitch of the blades about the longitudinal axis of the portion of the blade supporting arms received in the support sleeves, said connecting rods preventing the blade from flopping freely when the trowel is lifted with the blades spaced from the working surface.

In a rotary powered trowel having prime mover means, a troweling blade assembly, drive means interconnecting the prime mover means and blade assembly to rotate said blade assembly, and handle means connected to said trowel to enable an operator to manipulate and control the trowel, that improvement comprising said handle means including an elongated, upwardly inclined handle member, a handle bar assembly attached to the upper end of the handle member and means adjusting the position of the handle bar assembly vertically to facilitate positioning of the handle bar assembly at optimum height for each operator of the trowel, said handle bar assembly including an elongated member extending transversely of the handle member and terminating in hand grips, forwardly converging brace members attached to the transverse member and terminating in parallel flattened ends, said handle member having a transverse tube rigidly affixed thereto with the ends of the brace members disposed along opposite ends of the transverse tube on the handle member, clamp bolt means extending through the ends of the brace members and the transverse tube and including a hand knob to enable tightening and loosening of the ends of the brace members in relation to the transverse tube, said transverse tube being provided with a sleeve of resilient material and means interposed between the ends of the tube and the ends of the brace members to securely lock the brace members in angular relation to the tube when the knob is rotated to a handle bar assembly locking position, said transverse member having the hand grips on the ends being concave to enable an operator to engage this area with his hip or other portions of his anatomy to enable control of the trowel with minimum engagement of his hands with the hand grips.