Abstract: A water pump having a coolant flow path includes a stator disposed in a housing, a rotor surrounded by the stator, a shaft disposed in a flow path of the rotor, a first blade connected to the shaft, a first pipe spaced apart from an inner wall of the rotor defining the flow path to define a coolant inlet, a second pipe spaced apart from the inner wall to define a coolant outlet, and a second blade connected to the shaft and disposed in the first pipe or the second pipe.

Abstract: A water pump having a coolant flow path includes a stator disposed in a housing, a rotor surrounded by the stator, a shaft disposed in a flow path of the rotor, a first blade connected to the shaft, a first pipe spaced apart from an inner wall of the rotor defining the flow path to define a coolant inlet, a second pipe spaced apart from the inner wall to define a coolant outlet, and a second blade connected to the shaft and disposed in the first pipe or the second pipe.

Abstract: An apparatus for controlling driving of a stack cooling pump of a fuel cell system is provided. The apparatus includes a cooling unit having a fuel cell stack installed in a fuel cell vehicle and a cooling pump configured to move a coolant. A reservoir allows the coolant moving toward the cooling pump to be injected thereinto. A controller is configured to sequentially operate the cooling pump in a predetermined pre-run mode and a predetermined air bubble removal mode when the coolant is injected into the reservoir.

Abstract: An oil seal structure and a compressing apparatus including the oil seal structure are provided. The oil seal structure includes a rotating shaft, a bearing, a lower housing portion, an upper housing portion, an assembly surface seal member inserted into a first assembly surface seal groove, and an oil seal member provided in a first seal groove and a second seal groove and including a flange portion, wherein a lower oil receiving portion is formed in the lower housing portion, a first passage groove is formed in the first seal groove, and an oil passage is formed between a bottom surface of the first passage groove and the flange portion.

Abstract: An oil seal structure and a compressing apparatus including the oil seal structure are provided. The oil seal structure includes a rotating shaft, a bearing, a lower housing portion, an upper housing portion, an assembly surface seal member inserted into a first assembly surface seal groove, and an oil seal member provided in a first seal groove and a second seal groove and including a flange portion, wherein a lower oil receiving portion is formed in the lower housing portion, a first passage groove is formed in the first seal groove, and an oil passage is formed between a bottom surface of the first passage groove and the flange portion.

Abstract: A navigable search engine architecture comprising a plurality of search look up tables (10) having predetermined search values selectable by a user to define a search criteria, a plurality of target directories (14) consisting of target items that a search may be targeted to find, each directory organised with multi-level nodes, the nodes at each level having a heading that identifies a common characteristic or the target items linked to that node and a plurality of target directory indices (16) that are employed by the search engine to navigate through the target directories, each target directory index providing a link between each of said nodes in the target directories and related search values provided in said look up tables. When a user has defined a search criteria using said search values, the search engine finds and lists (20) the headings of the nodes that are related to said search criteria.