Abstract: An improved single-pass hook and blade type agricultural shear with a central pivotal axis. The shear includes an elongate hook with an outer end and an inner end pivotally supported about said axis. Said hook has a substantially radially extending circumferentially disposed concave branch supporting shearing edge. The shear next includes an elongate blade with an outer end and an inner end supported about said axis. Said blade has a substantially radially extending circumferentially disposed convex primary cutting edge opposing said shearing edge. The cutting edge has an outer portion and has an inner portion circumferentially offset from said outer portion and has a substantially circumferentially extending radially inwardly disposed intermediate cutting edge extending between the outer and inner portions of said primary cutting edge. The outer portion of the primary cutting edge and the intermediate cutting edge define a sharp pointed lancet blade between the ends of the primary cutting edge.

Abstract: A unitary back-pack air supply to supply air to a pneumatic hand tool. The back-pack includes a substantially flat, rectilinear frame defining an air supply chamber and substantially flat vertical front and rear planes. Shoulder and waist straps are connected with the frame to extend over the shoulders and about the waist of a wearer and to support the frame at the wearer's back. A heat and sound insulating and vibration dampening back engaging panel is carried by the frame at the front plane thereof. A mounting plate is positioned rearward of the rear plane of the frame and is connected thereto by shock mounting devices. An engine driven air compressor unit is mounted on the plate to project rearwardly therefrom. An air supply line connects the unit with the chamber of the frame. An elongate flexible air delivery line connects with and extends between the frame and a pneumatic tool engaged in one hand of the wearer.