Abstract: An underwater exhaust system and method which includes an exhaust valve having a sealing edge, an exhaust outlet for exiting an exhaust gas, and a projection for directing water flow away from the exhaust valve. The exhaust valve includes a valve head and a valve stem, the valve stem being coupled with the valve head. The system and method prevent a siphoning effect, whereby leakage of water into the exhaust valve is minimized or prevented.

Abstract: A tape dispensing system uses a handle section that has a plate member with a handle thereon and a receiver which removably receives a J-shaped guide bar such that its minor leg has a rounded cross-section and its major leg, used to guide, has a triangular cross-section. A drum section has a ring with upwardly facing scalloped indents and downwardly depending resilient tabs that receive the core of the roll and bias against the roll. A circumferential lip of the handle section is removably and rotatably received within an annular lip on an inner edge of the ring member.

Abstract: A diving helmet bubble diverter comprises a front skirt portion and a rear skirt portion attached to the front skirt portion at one end. The rear skirt portion is configured for mounting onto the diving helmet breathing regulator assembly. The attached front and rear skirt portions form side pockets that divert exhaust air bubbles away from the diver's mask when the rear skirt portion is mounted onto the regulator assembly. The mounted rear skirt portion forms a protective barrier between the exterior wall of the diving helmet and the exhaust whisker of the breathing regulator assembly that prevents air bubbles exiting the whisker from coming into contact with the diving helmet during diving activities.

Abstract: An underwater exhaust system includes an exhaust valve with a valve cover operatively coupled thereto. The valve cover is adapted to create an exhaled air pocket on the water interface side of the valve. The exhaled air pocket allows the valve to operate under reduced water resistance. The valve cover includes at least one water inlet passage and at least one exhaust gas opening.

Abstract: Provided are exemplary embodiments of an underwater breathing exhaust system configured to lower the exhalation, effort and to direct water adjacent an exhaust valve to reduce the likelihood of water entering the system and/or gas free flowing from the system.

Abstract: A viewing lens that is divided into at least three sections such that a wearer can see through a center section with both eyes, and can see through a lateral section only with the eye immediately adjacent to that section.

Abstract: A retaining system for the hood, face seal, and mounting band(s) of facemasks that have a hood and/or a face seal that are sealed and securely mounted to the mask using a band type of clamping method, is provided. The retaining system may include a redundant system that may not allow the mask to be separated from the hood, face seal, and the mounting band(s).

Abstract: A viewing lens that is divided into at least three sections such that a wearer can see through a center section with both eyes, and can see through a lateral section only with the eye immediately adjacent to that section.

Abstract: A scuba diving bubble diverter adapted for use by a diver wearing a diving mask and air regulator and employing a skirt system for diverting bubbles emanating from the breathing regulator away from the diver's head.

Abstract: A Scuba diving bubble diverter for diverting bubbles and attendant noise away from the diver's face, including line of vision, and improving the diver's ability to communicate is disclosed.

Abstract: A method and system for breathing gas heat exchange for use with an underwater pressurized gas source connected to a breathing apparatus comprising a length of tubing sufficient in diameter and length to allow heat exchange of expanding gas from the pressurized source to the breathing apparatus in order to substantially increase the temperature of the expanding gas. The tubing being made of a heat conducting material and being wholly unenclosed and open for contact with ambient fluid within which the method and system is used.

Abstract: A process is provided for preparing an S-enantiomer compound having the formula in enantiomeric excess, or an R-enantiomer compound having the formula in enantiomeric excess, said process comprising hydrolyzing a compound having the formula with: (a) an enzyme capable of producing an enantiomeric excess of the S-enantiomer compound of formula (IA) of at least 70%, or (b) an enzyme capable of producing an enantiomeric excess of the R-enantiomer compound of formula (IB) of at least 70%, wherein R1 is selected from the group consisting of alkyl, aryl, aralkyl, cycloalkyl, or cycloalkylalkyl.

Abstract: Disclosed is a process for preparing chiral compounds of the formula (I) ##STR1## wherein: X.sup.1 and X.sup.2 are independently F or Cl; and E is --SO.sub.2 R.sup.2, wherein R.sup.2 is C.sub.1 -C.sub.6 alkyl, --C.sub.6 H.sub.4 CH.sub.3 or --CF.sub.3 ; its enantiomer and racemates thereof, useful in the synthesis of tetrahydrofuran azole antifungals. Novel compounds of the formula ##STR2## wherein: X.sup.1 and X.sup.2 are independently F or Cl; B represents --C(O)Q* or --CH.sub.2 OR"; Q* represents a chiral auxiliary group; R" represents a hydroxy protecting group selected from --CH.sub.2 C.sub.6 H.sub.5, or --C(O)R.sup.1, wherein R.sup.1 is C.sub.1 -C.sub.6 alkyl; and A represents Cl, Br, I or triazolyl; are also disclosed.

Abstract: A bar to be used in a storage rack system is provided for the dual storage of computer tape reels and/or computer tape packs. The storage rack system has a series of bars arranged in rows and columns. The storage rack system has flexibility in that the bars are of one uniform design such that computer tape reels and packs can be stored simultaneously in one system.

Abstract: 1. A method of decreasing the deleterious effects of cavitation on a ship propeller comprising providing a propeller having supercavitating blade sections, rotating said propeller to drive said ship, and ejecting air from the suction side of each said blade when said ship speed and propeller speed reach a predetermined point to thereby produce a cavity which extends from the leading edge to a point in the water beyond the trailing edge of said blade and envelops the entire suction side of said blade.