Abstract: A hot water delivery system includes a water heater, a mixing valve that is coupled to the output of the water heater, and a plurality of loads that are coupled to the output of the mixing valve. A load set point temperature of each load that is representative of a maximum temperature of the hot water that is to be delivered to the respective load is set by a user. Responsive to detecting the occurrence of an event associated with a load of the plurality of loads, a controller of the water heater controls the mixing valve to adjust the temperature of the hot water from the water heater to the load set point temperature associated with the load, provided the load set point temperature of the load is different from a water heater set point temperature at which the water heater maintains the hot water therein.

Abstract: In accordance with the present invention, there is provided an apparatus for pivoting a surgical retractor with respect to a patient it is being used on. The apparatus has a bridge for engaging at least one arm of a surgical retractor. The bridge has a distal end, a proximal end and a longitudinal axis extending therebetween. The bridge further includes a distal coupling attached to the distal end of the bridge for releasably attaching the bridge to the surgical retractor. The apparatus also has a lifting assembly comprising an elevator. The lifting assembly is for applying an upward force to the proximal end of the bridge, so that when the apparatus is attached to a surgical retractor the lifting assembly pivots the retractor upward about the distal coupling. The elevator includes a bridge coupling for attaching the lifting assembly to the proximal end of the bridge. The bridge coupling has a rotatable connection for allowing the bridge to rotate about its longitudinal axis.