Abstract: An electrosurgical pencil includes a handle housing defining a fluid lumen and a central longitudinal axis. A nozzle defines a fluid lumen in fluid communication with the fluid lumen defined by the handle housing for evacuating fluid from a surgical site. The nozzle includes a slot configured to receive a nub protruding from the distal end portion of the handle housing to releasably couple the nozzle to the handle housing. An electrode configured to deliver electrosurgical energy to tissue has a proximal portion coupled to the handle housing and a distal portion extending through the fluid lumen defined by the nozzle. At least a portion of the electrode extends distally from a distal end of the nozzle. The electrode defines a central longitudinal axis offset from the central longitudinal axis defined by the handle housing.

Abstract: A filter unit for insertion in, and removal from, an opening in a mounting plate of a dust collector, the filter unit including a filter bag having a lengthwise extent and a tubular configuration, and the upper portion of the bag is biased outwardly to its fully extended or cylindrical disposition and is formed with a slot for engaging the partition plate in the dust collector for mounting therein. Also, the filter unit includes a cage having a lengthwise extent and a generally tubular configuration, and the cage includes a plurality of longitudinally extending support members that engage the surrounding bag and normally maintain it at its fully extended configuration, and the support members are constructed so that they can be moved inwardly by the application of a manual force at the exterior of the upper portion of the bag, whereby the upper portion of the bag can be collapsed to permit removal and installation of the filter unit in the partition plate.

Abstract: A dust collector for removing entrained particles from an air stream that includes filter elements that are periodically cleaned, such as by a pulse jet, to remove the collected particles therefrom, which particles move downwardly to a hopper at the bottom of the dust collector. A container having a removable lid and a drum portion are disposed beneath the hopper to receive the collected dust particles for ultimate removal, and the lid is securely sealed to the drum portion of the container by an annular inflatable balloon-type seal that extends between a flange on the lid and the side wall of the drum, with the air used to operate the inflatable seal preferably being obtained from the existing pulse jet system for the dust collector.