Abstract:
An additive heat transfer unit (AHTU) can be part of or added to an air source heat pump HVAC system. The heat pump system includes a compressor (2), an expansion valve (6), first and second air source heat exchangers (22), and a reversing valve (20). The system can have a cooling mode and a heating mode, such that in the cooling mode the first air source heat exchanger functions as an evaporator and the second air source heat exchanger functions as a condenser, this being reversed in the heating mode. The AHTU includes a liquid source heat exchanger (24) that can be used to increase the efficiency of the system.
Abstract:
A heating system can include certain pressure sensitive features. These features can be configured to change from a first position to a second position based on a pressure of a fuel flowing into the feature. These features can include, fuel selector valves, pressure regulators, burner nozzles, and oxygen depletion sensor nozzles, among other features.
Abstract:
A heating system can include certain pressure sensitive features. These features can be configured to change from a first position to a second position based on a pressure of a fuel flowing into the feature. These features can include, fuel selector valves, pressure regulators, burner nozzles, and oxygen depletion sensor nozzles, among other features.
Abstract:
A heating system can include certain pressure sensitive features. These features can be configured to change from a first position to a second position based on a pressure of a fuel flowing into the feature. These features can include, fuel selector valves, pressure regulators, burner nozzles, and oxygen depletion sensor nozzles, among other features.
Abstract:
The invention is directed to a ratcheted wrench for removing threaded fasteners having two ends and a handle extending between them, and two double-sided fastener extraction heads, one at each end, each fastener extraction head driven by a reversible ratchet, the wrenching having at least two and up to four differently sized receiving areas for accommodating differently sized fastener heads, the ratcheted motion permitting the user of the wrench to easily switch to a different sized receiving area by flipping the wrench over and switching the ratchet direction, or by using the other end of the wrench.
Abstract:
A heat engine can have a fuel selector valve for selecting between a first fuel and a second fuel. Making the selection with the fuel selector valve can also determine a flow path through the heat engine, there being two different paths, each configured for a different fuel. A burner nozzle can form a single unit with the fuel selector valve. In some embodiments the burner nozzle can also form a single unit with an outlet valve.
Abstract:
A dual fuel heating system (10) can be used in a gas appliance. The system can have an air shutter (60) to regulate an amount of air that can mix with the fuel for combustion. The air shutter can be configured to have different positions depending on the type of fuel to be used.
Abstract:
Fragile cells have value for use in diagnosing many types of conditions. There is a need for compositions that stabilize fragile cells. The stabilization compositions of the provided invention allow for the stabilization, enrichment, and analysis of fragile cells, including fetal cells, circulating tumor cells, and stem cells.
Abstract:
A method for determining a concentration of an analyte is disclosed. The method includes applying a potential excitation to a fluid sample containing an analyte and determining if a current decay curve associated with the fluid sample has entered an analyte depletion stage. The method also includes measuring a plurality of current values associated with the fluid sample during the analyte depletion stage and calculating an analyte concentration based on at least one of the plurality of current values.
Abstract:
A biosensor having a first conductive component is described, wherein the first conductive component includes at least one boundary formed by a first processing technique and at least one boundary formed by a second processing technique not the same as the first processing technique. The biosensor can also have a second conductive component including at least one boundary formed by the first processing technique and at least one boundary formed by a third processing technique not the same as the first processing technique. Further, the biosensor has a third conductive component including at least one boundary formed by the second processing technique and at least one boundary formed by the third processing technique not the same as the second processing technique.