Abstract: Means for preventing contamination of the surgical viewing instrument including a flexible bag mounted on the proximal end of a hollow double walled tubular elongated member concentrically mounted to a borescope or surgical viewing instrument where the space between the walls define a passage for flowing fluid to a cuff or vortex generator disposed at the distal end of the tubular member which defines a discretely configured discharge port for flowing fluid over a lens surface for cleansing and defogging purposes. The lens serves to prevent blood, body fluid and other contaminates from back flowing and contaminating the surgical viewing instrument. A two-piece locking handle may be used to lock the lens cleaning apparatus to the borescope. Another embodiment includes a flexible tube utilized with the cuff.

Abstract: A hollow tubular elongated member is concentrically mounted to a borescope or surgical viewing instrument defining a spaced passage for flowing fluid to a cuff which is discretely located below the distal end of the lens of the borescope and which defines a discretely configured discharge port for flowing fluid over the lens surface for cleansing and defogging purposes. A two-piece locking handle may be used to lock the lens cleaning apparatus to the borescope. Another embodiment includes a flexible tube utilized with the cuff.

Abstract: A dental mirror including means for providing suction and rinsing service to the mouth cavity and the like including a substantially annular inlet port formed at the edge of the mirror housing interconnecting longitudinal passages formed in the dental mirror handle and a self-locking swivel coupling connecting the proximal end of the dental mirror handle and a hose or tube connected to a liquid or air and vacuum remotely mounted source. In one embodiment the area of the inlet port progressively increases and in another embodiment the upper and lower plates of the mirror housing are supported by aerodynamically clean struts and the mirror may form the upper plate.

Abstract: A turbine engine having a combustor premix system for mixing fuel and air to provide increased efficiency by reducing temperature peaks in the combustor. The system includes a primary mixing chamber for mixing compressed air and atomized fuel and a secondary mixing chamber located between the primary mixing chamber and the combustor for mixing additional compressed air to the fuel-air mixture. The secondary mixing chamber comprises a plurality of tubes with air metering ports in the walls thereof and a control assembly to vary the air flow to the ports for off design engine operating conditions, and optimizes fuel-air mixtures for the combustor at all engine operating speeds improving fuel economy and exhaust pollution control. The primary mixing chamber is located adjacent to and between the compressor for the air and the combustor so that the fuel-air mixture flowing therethrough tends to cool the compressor and the chamber itself shields the compressor from radiant heat from the combustor.

Abstract: A catheter comprising an elongated tube and an inflatable balloon. The elongated tube has a wall defining a main lumen in its interior. The distal end of the tube is insertable within a body while its proximal end remains exteriorally of the body. A port extends through the tube wall to provide fluid communication between the main lumen and the exterior of the tube at the distal end of the tube. The inflatable balloon has an opening extending through its side, which opening is aligned with the port in the tube. The peripheries of the opening in the balloon and of the port in the tube are completely adhered. An inflation lumen is also provided in the tube which conducts fluid pressure to and from the interior of the balloon to inflate and deflate the balloon. This arrangement enables the inflated balloon to cushion fully the distal end of the catheter and provide a tapered lead in to the port to enhance drainage.