Abstract: A cooling circuit through which coolant flows, for use with a refrigerated cabinet. The cooling circuit includes a compressor and a condenser with a flow path extending there between. The cooling circuit also includes an evaporator and a second flow path that extends between the evaporator and the condenser. The cooling circuit additionally includes a suction accumulator and a flow path extending between the evaporator and the suction accumulator, while a fourth flow path extends between the suction accumulator and the compressor. The cooling circuit also includes a coolant bypass and a switch that switches the cooling circuit between a cycling mode and a non-cycling mode.

Abstract: A dryer system for frost prevention in an ultra low temperature freezer includes a passive port coupled to an air dryer apparatus.

Abstract: A rotational float system (44) that is meant to be used with existing side load protection systems and that may be selectively operated to permit a digger derrick rotation motor (20) or other rotatable equipment to freely rotate toward a side load to ease operation of and prevent damage to the digger derrick (10) and to assist in the correct installation of screw anchors. The rotational float system (44) includes valve structure (46) interposed between the ports (32, 34) of a hydraulic rotation motor (20) and a control mechanism (48) for selectively opening and closing the valve structure (46). The valve structure (46) is normally biased to a closed position and the control mechanism (48) is normally open. When the control mechanism (48) is operated, it opens the valve structure (46) to connect the ports (32, 34) of the rotation motor (20) to one another.

Abstract: A cooling circuit through which coolant flows, for use with a refrigerated cabinet. The cooling circuit includes a compressor and a condenser with a flow path extending there between. The cooling circuit also includes an evaporator and a second flow path that extends between the evaporator and the condenser. The cooling circuit additionally includes a suction accumulator and a flow path extending between the evaporator and the suction accumulator, while a fourth flow path extends between the suction accumulator and the compressor. The cooling circuit also includes a coolant bypass and a switch that switches the cooling circuit between a cycling mode and a non-cycling mode.

Abstract: A rotational float system (44) that is meant to be used with existing side load protection systems and that may be selectively operated to permit a digger derrick rotation motor (20) or other rotatable equipment to freely rotate toward a side load to ease operation of and prevent damage to the digger derrick (10) and to assist in the correct installation of screw anchors. The rotational float system (44) includes valve structure (46) interposed between the ports (32, 34) of a hydraulic rotation motor (20) and a control mechanism (48) for selectively opening and closing the valve structure (46). The valve structure (46) is normally biased to a closed position and the control mechanism (48) is normally open. When the control mechanism (48) is operated, it opens the valve structure (46) to connect the ports (32, 34) of the rotation motor (20) to one another.

Abstract: A cooling circuit through which coolant flows, for use with a refrigerated cabinet. The cooling circuit includes a compressor and a condenser with a flow path extending there between. The cooling circuit also includes an evaporator and a second flow path that extends between the evaporator and the condenser. The cooling circuit additionally includes a suction accumulator and a flow path extending between the evaporator and the suction accumulator, while a fourth flow path extends between the suction accumulator and the compressor. The cooling circuit also includes a coolant bypass and a switch that switches the cooling circuit between a cycling mode and a non-cycling mode.

Abstract: A method of cementing a well permitting a reduction in the degree of diameter reduction of casing or liners required, and not requiring excessively large initial conductor casing, is described. The method is characterized by provision of an enlarged wellbore and a novel liner structure which is adapted for expansion of a reduced diameter section thereof downhole, providing, before expansion of the section, unimpeded flow of fluid from the enlarged wellbore during cementing and close fit of the expanded section with the casing or preceding liner, after cementing is completed and expansion of the section. A novel well liner structure and novel well liner expansion means are disclosed.