Abstract: An HVAC pipe cleaning system includes a pipe cleaning adapter attached to the upstream end of a pipe and a catch device attached to the downstream end of the pipe k cylindrical wiper is closely fitted into the interior of the pipe cleaning adapter and is propelled from the pipe adapter into the pipe by means of gas pressure behind the cylindrical wiper. A flushing solvent fitting is used to inject flushing solvent into the pipe cleaning adapter ahead of the wiper.

Abstract: A novel pair of jacks and method for separating A-coils from furnaces to allow the removal or replacement of furnaces is provided having at one end a pair of lift plates, stabilization cord and tensioning mechanisms for tensioning the stabilization cord and stabilizing the pair of jacks with respect to the A-coil housing to allow the removal of the furnace housing and storage of the A-coil housing on the novel stabilized pair of jacks. The novel pair of jacks include a lifting mechanism and handle for lifting the lift plates and thereafter storing the handle while simultaneously locking the release mechanism. A scotching mechanism may also be provided to prevent damage to the novel jacks from improper use.

Abstract: A safety harness particularly adapted for use by hunters who hunt from trees. The harness includes a waist web, a chest web, a shoulder web all slideably engaging a rear gang connector, a lifeline attached to the rear gang connector and adjustable quick release buckles attached to the chest and waist webs, respectively. The rear gang connector causes any tension in the lifeline to be evenly distributed between the chest web and the waist web in the event of a fall. The quick release buckles permit the hunter to release himself from the harness with one hand even when the harness is supporting his full weight.

Abstract: Apparatus attachable to a vertically extending object and having a stand and seat for providing support is disclosed. Means are provided for adjusting the pitch of the seat. Cables connected to the frame and the stand support much of the weight on the stand in order to provide stability. Both the seat and stand pivot so as to form a compact package for storage and portage. Means are provided for maintaining the apparatus noiseless both when the apparatus is flexed and when the seat and stand are pivoted. Other embodiments include only the seat and only the stand.