Abstract: Apparatus (10) for recovering fumes from a roofing kettle (12) includes a fan (72) for drawing air from the hollow interior of a housing (20). A conduit (34) extends through the housing front wall (22) and terminates in the hollow interior. A burner assembly (44) is disposed within the conduit (34) for providing a flame within the conduit (34). The housing side wall (30) includes a fresh air intake (78). A flexible metal hose (80) extends between the outer free end of the conduit (34) and the roofing kettle (12). Rotation of the fan (72) causes air to be drawn from the interior of the housing (20) and in turn through the fresh air intake (78), through the conduit (34) and the hose (80) from the interior of the kettle (12), and through the duct (46) and tube (58) of the burner assembly (44).

Abstract: Apparatus (10) for recovering fumes from a roofing kettle (12) includes a fan (72) for drawing air from the hollow interior of a housing (20). A conduit (34) extends through the housing front wall (22) and terminates in the hollow interior. A burner assembly (44) is disposed within the conduit (34) for providing a flame within the conduit (34). The housing side wall (30) includes a fresh air intake (78). A flexible metal hose (80) extends between the outer free end of the conduit (34) and the roofing kettle (12). Rotation of the fan (72) causes air to be drawn from the interior of the housing (20) and in turn through the fresh air intake (78), through the conduit (34) and the hose (80) from the interior of the kettle (12), and through the duct (46) and tube (58) of the burner assembly (44).

Abstract: Apparatus (10) for recovering fumes from a roofing kettle (12) includes a fan (72) for drawing air from the hollow interior of a housing (20). A conduit (34) extends through the housing front wall (22) and terminates in the hollow interior. A burner assembly (44) is disposed within the conduit (34) for providing a flame within the conduit (34). The housing side wall (30) includes a fresh air intake (78). A flexible metal hose (80) extends between the outer free end of the conduit (34) and the roofing kettle (12). Rotation of the fan (72) causes air to be drawn from the interior of the housing (20) and in turn through the fresh air intake (78), through the conduit (34) and the hose (80) from the interior of the kettle (12), and through the duct (46) and tube (58) of the burner assembly (44).

Abstract: Roofing kettle apparatus for heating asphalt includes a wheeled chassis mounting a vat and a heating system for heating the vat. The heating system includes a solenoid operated valve for controlling the flow of fuel gas from a fuel gas source to each of a pair of burner nozzles and a igniter assembly having an outlet adjacent the outlet of a first combustion chamber. An igniter generates a spark to ignite gas discharging from the igniter assembly outlet. A flame sensor adjacent to the first combustion chamber outlet end senses the burning of fuel gas. The igniter assembly has a second outlet adjacent the second combustion chamber outlet end. The ignition of fuel gas discharging from the igniter assembly ignites the gas discharging through the combustion chamber outlets. The burners extend into the combustion chambers.

Abstract: A fastener puller for pulling screws (38) and the like from a deck (39) or other workpiece that includes a base (10) having a planar base portion (11B, 11C) joined to an inclined base portion (14) to provide a fulcrum about which the base pivots to move the planar base portion parallel to the adjacent part of the deck as the claw (30), while extending between the insulation hold down plate (35) and the insulation (37) on the deck, is initially moved perpendicularly to the planar base portion by a piston cylinder combination (20, 21). The screw, in being removed, is moved perpendicularly to the part of the deck in which it is extended. The combination reciprocates a slider (24) along the slide mount (17B). The claw is mounted to the slider while the slide mount is mounted to the base to extend perpendicular to the planar base portion whereby the claw is moved to minimize the enlargement of the hole in the deck as the screw is separated from the deck.

Abstract: Apparatus is described for an improved roofing kettle. The improvements comprise electronic temperature control apparatus for the kettle vat. Automatic shutoff apparatus is provided for shutting off the fuel supply in the event the fuel supply is not properly ignited. Apparatus is provided to shut off the flow of fuel to the kettle in the event the kettle temperature reaches a dangerous level.

Abstract: Apparatus and method are disclosed to provide an electronic perimeter warning system to prevent the ingress or egress of persons or machines from a selected area such as in an area along the perimeter of a roof under construction. Battery powered signal transmitters and receivers establish a signal beam between two locations. When the continuity of the signal beam is broken, an alarm is sounded to warn the person who is crossing the signal beam of imminent danger.

Abstract: Apparatus and method are described for picking up and removing gravel. The apparatus and method are particularly adapted to the removal of gravel from the surface of a roof when an old roof is being removed or repaired.