Abstract: A flat roof racking system configured for receiving solar panels having electrically conductive frames, the racking system comprising substantially parallelly disposed panel support structures, spacer bars and retaining and grounding clips pairs, each panel support structure comprises a first end, a second end, a top member having a first channel section connected to a second channel section and two ends, and a bottom member having a channel section and two ends. The first and second channel sections are disposed in a plane but at an angle from one another and each end of the bottom member is fixedly connected to an end of the top member such that the top member is configured to make a first tilt angle at the first end with the bottom member and a second tilt angle at the second end with the bottom member.

Abstract: A grounding clip for electrically bonding at least three objects in one action. In use, the grounding clip is interposed between at least three objects such that the first and second banks of teeth are configured to penetrate the objects to electrically bond them. The grounding clip has a planar body, a pair of opposingly disposed first banks of teeth that extend downwardly and outwardly from the planar body at an angle. There is also a pair of opposingly disposed second banks of teeth formed of a rotatable plate disposed in a plane at an angle and extending downwardly and outwardly from the planar body. The second banks of teeth terminate in a plurality of second teeth disposed upwardly and in an angled plane with respect to the rotatable plate.

Abstract: A flat roof racking system configured for receiving solar panels having electrically conductive frames, the racking system comprising substantially parallelly disposed panel support structures, spacer bars and retaining and grounding clips pairs, each panel support structure comprises a first end, a second end, a top member having a first channel section connected to a second channel section and two ends, and a bottom member having a channel section and two ends. The first and second channel sections are disposed in a plane but at an angle from one another and each end of the bottom member is fixedly connected to an end of the top member such that the top member is configured to make a first tilt angle at the first end with the bottom member and a second tilt angle at the second end with the bottom member.

Abstract: A grounding clip for electrically bonding at least three objects in one action. In use, the grounding clip is interposed between at least three objects such that the first and second banks of teeth are configured to penetrate the objects to electrically bond them. The grounding clip has a planar body, a pair of opposingly disposed first banks of teeth that extend downwardly and outwardly from the planar body at an angle. There is also a pair of opposingly disposed second banks of teeth formed of a rotatable plate disposed in a plane at an angle and extending downwardly and outwardly from the planar body. The second banks of teeth terminate in a plurality of second teeth disposed upwardly and in an angled plane with respect to the rotatable plate.

Abstract: A scalpel for performing complex surgeries, such as c-sections, is formed of a body that is preferably elongated and shaped and sized to fit ergonomically into the hands of surgeons. The body has surfaces that are joined to each other by smooth transition elements to insure that the body has no points or sharp edges that could cut or scratch the surgeon or the patient. The body is formed with a triangular notch formed of a beak and an extension. A surgical blade, preferably a standard off-the-shelf surgical blade, is imbedded in the body and the only portion of the blade that is accessible is a portion of its cutting edge spanning the notch. The scalpel is used by introducing the beak into a slit in the tissue with the blade portion facing the direction in which the cut is to be made. The body of the scalpel is then grasped firmly and advanced to make the cut. The initial incision can be made with the tip of the beak. In one embodiment, the body is molded around the blade.

Abstract: A tray having a pair of stamped instrument racks includes a pair of side walls which taper transversely and longitudinally toward each other at their opposite ends. The tapered ends form wedge-like extensions which lead into a pair of rounded end walls. The tapered ends and rounded end walls form a chisel shaped profile which facilitates insertion of the tray into an autoclave bag. A spring-actuated retainer is operable with one hand to secure or release a plurality of instruments held in the racks.

Abstract: Undesired contact with dental debris is minimized by a disposable dental trap which is provided with a removable top cover and a pivotable handle. The useful capacity of the trap is increased with a corrugated filter which increases the available filter surface area and thereby reduces the frequency of trap replacement.

Abstract: A method and apparatus for forming and dispensing a liquid coating material formulation or solution containing a nitrocellulose liquid coating composition and a supercritical fluid as a fluid diluent includes structure for combining the two components within a circuitous flow path or loop to form the coating material solution or formulation, while ensuring that the dissolved solids within the liquid coating composition do not precipitate and clog the supply of fluid diluent into the loop.

Abstract: A vibration cancellation device is provided for an air motor with a reciprocating drive piston. The device consists of an anti-phase piston which is axially aligned with the drive piston and reciprocates in the opposite direction of the drive piston. In one embodiment, the stroke of the anti-phase piston is adjustable to permit optimizing its vibration cancellation characteristics.

Abstract: A holder for a beaker insertable in a container of an ultrasonic cleaning device for cleaning medical or dental tools, dentures, or the like, in a cleaning solution contained in the beaker. The holder includes a ring-shaped member, which receives the beaker and a supporting U-shaped wire which supports the bottom wall of the beaker and is removably-connectable to the ring-shaped member.