Abstract: A gasket for concrete structures such as tunnel segments includes a gasket body having a bottom face configured to be positioned against a surface of an associated tunnel segment. The bottom face may include a set of spaced indentations. First and second anchor members protrude from opposed side edges of the gasket adjacent the bottom face of the gasket. The anchor members are configured to attach the gasket to the tunnel segment during casting of a precast concrete member. The gasket body forms a groove in the concrete member and the anchor members form side channels in the groove. A respective fin can be provided on opposed side faces of the gasket. Should a defect be found in the original gasket, the gasket body can be removed from the groove of the concrete member relatively easily, even in the field, and a replacement gasket having corresponding anchor members, fins and indentations, can be snapped into the groove.

Abstract: A gasket for concrete structures such as tunnel segments includes a gasket body having a bottom face configured to be positioned against a surface of an associated tunnel segment. First and second anchor members protrude from opposed side edges of the gasket adjacent the bottom face of the gasket. The anchor members are configured to attach the gasket to the tunnel segment during casting of a precast concrete member. The gasket body forms a groove in the concrete member and the anchor members form side channels in the groove. Should a defect be found in the original gasket, the gasket body can be removed from the groove of the concrete member relatively easily, even in the field, and a replacement gasket having corresponding anchor members can be snapped into the groove.

Abstract: A gasket for concrete structures such as tunnel segments includes a gasket body having a bottom face configured to be positioned against a surface of an associated tunnel segment. The bottom face may include a set of spaced indentations. First and second anchor members protrude from opposed side edges of the gasket adjacent the bottom face of the gasket. The anchor members are configured to attach the gasket to the tunnel segment during casting of a precast concrete member. The gasket body forms a groove in the concrete member and the anchor members form side channels in the groove. A respective fin can be provided on opposed side faces of the gasket. Should a defect be found in the original gasket, the gasket body can be removed from the groove of the concrete member relatively easily, even in the field, and a replacement gasket having corresponding anchor members, fins and indentations, can be snapped into the groove.

Abstract: A gasket for concrete structures such as tunnel segments includes a gasket body having a bottom face configured to be positioned against a surface of an associated tunnel segment. First and second anchor members protrude from opposed side edges of the gasket adjacent the bottom face of the gasket. The anchor members are configured to attach the gasket to the tunnel segment during casting of a precast concrete member. The gasket body forms a groove in the concrete member and the anchor members form side channels in the groove. Should a defect be found in the original gasket, the gasket body can be removed from the groove of the concrete member relatively easily, even in the field, and a replacement gasket having corresponding anchor members can be snapped into the groove.

Abstract: According to an embodiment of the invention, an electric machine is provided. The machine includes a support structure, a stator secured to the support structure, and a rotor rotatably secured to the support structure. The machine also includes a circuit board positioned at least partially within the support structure. The circuit board is adapted for controlling an electromagnetic field produced by the stator. The machine also includes a potting material in contact with a first surface of the circuit board and a harrier for at least partially containing the potting material.

Abstract: An air handling system comprises a housing and a fan configured to circulate air. The housing comprises at least one wall defining a passageway for the air and at least one vortex generator coupled to the at least one wall. The at least one vortex generator extends partially into the passageway.

Abstract: A centrifugal fan is described. The fan uses a blade that is tapered across the span of the blade. The taper can be larger towards the end opposite of the inlet or larger at the inlet. The blade may be backwardly inclined and/or curved. The fan may also include a turning vane.

Abstract: In one aspect, a centrifugal blower assembly is provided. The centrifugal blower assembly includes a housing defining an interior space and an impeller configured to channel an airflow within the interior space. A motor is coupled to the impeller and configured to rotate the impeller about an axis. The centrifugal blower also includes a plurality of mounting arms. Each mounting arm of the plurality of mounting arms includes a first end coupled to the housing and a second end coupled to the motor. Each mounting arm of the plurality of mounting arms has a cross-sectional profile that comprises a portion of an airfoil shape.

Abstract: A centrifugal blower assembly includes a housing having an inner surface and an outer surface. The inner surface of the housing defines in part an interior space. The centrifugal blower also includes a first portion of texture applied to at least a first portion of at least one of the inner surface and the outer surface of the housing. The first portion of texture has a first height based at least in part on a local boundary layer height of an airflow moving across at least one of the inner surface and the outer surface respectively. The first portion of texture is configured to generate a turbulent flow within the airflow moving across the first portion of texture.

Abstract: A fastening system for connecting display modules can include a corner block, a retainer, and a fastener. The corner block can include a first block plate and a second block plate, the first and second block plates being angled relative to one another, the corner block including a block fastener hole through the first block plate. The retainer can include a first retainer plate and a second retainer plate, the first and second retainer plates being angled relative to one another, the retainer including a retainer fastener hole through the first retainer plate, wherein interior surfaces of the first and second block plates are proximate to respective exterior surfaces of the first and second retainer plates and the corner block and the retainer are aligned such that the retainer fastener hole is substantially aligned with the block fastener hole.

Abstract: According to an embodiment of the invention, an electric machine is provided. The machine includes a support structure, a stator secured to the support structure, and a rotor rotatably secured to the support structure. The machine also includes a circuit board positioned at least partially within the support structure. The circuit board is adapted for controlling an electromagnetic field produced by the stator. The machine also includes a potting material in contact with a first surface of the circuit board and a harrier for at least partially containing the potting material.

Abstract: A centrifugal fan is described. The fan uses a blade that is tapered across the span of the blade. The taper can be larger towards the end opposite of the inlet or larger at the inlet. The blade may be backwardly inclined and/or curved. The fan may also include a turning vane.

Abstract: In one aspect, a centrifugal blower assembly is provided. The centrifugal blower assembly includes a housing defining an interior space and an impeller configured to channel an airflow within the interior space. A motor is coupled to the impeller and configured to rotate the impeller about an axis. The centrifugal blower also includes a plurality of mounting arms. Each mounting arm of the plurality of mounting arms includes a first end coupled to the housing and a second end coupled to the motor. Each mounting arm of the plurality of mounting arms has a cross-sectional profile that comprises a portion of an airfoil shape.

Abstract: An air handling system comprises a housing and a fan configured to circulate air. The housing comprises at least one wall defining a passageway for the air and at least one vortex generator coupled to the at least one wall. The at least one vortex generator extends partially into the passageway.

Abstract: A centrifugal blower assembly includes a housing having an inner surface and an outer surface. The inner surface of the housing defines in part an interior space. The centrifugal blower also includes a first portion of texture applied to at least a first portion of at least one of the inner surface and the outer surface of the housing. The first portion of texture has a first height based at least in part on a local boundary layer height of an airflow moving across at least one of the inner surface and the outer surface respectively. The first portion of texture is configured to generate a turbulent flow within the airflow moving across the first portion of texture.

Abstract: A sealing assembly for a liquid conveying system includes a first structure defining an aperture, such as a pipe receiving aperture. A second structure, such as a pipe is received in the aperture. And an annular seal is disposed within the aperture for radially sealing between the first structure and the second structure. The seal includes an outer radial portion embedded in the first structure and an inner radial portion in sealing engagement with the second structure. The inner radial portion defines an internal cavity containing a substantially incompressible fluid or gel that is movable within the cavity to provide a dynamic seal with the second structure.

Abstract: The present disclosure pertains to a self adjusting gasket to prevent leakage at a joint between an associated first pipe and an associated second pipe including a wedge shaped body made of a generally compressible, leak proof material. The wedge shaped body having a profile that includes a tapered front portion, a planar rear portion, a first contact surface, an inclined second contact surface, including a first fin having a trailing edge oriented generally normal to the first contact surface and a second fin spaced from the first fin. A generally continuous annular cavity is located in the wedge shaped body wherein the cavity is not symmetrically shaped and a fluid disposed in the cavity.

Abstract: A gasket assembly includes a one-piece gasket that has a mounting end, for mounting to an associated enclosure body, and a pipe engaging end, for receiving an associated pipe. An intermediate section is located between the mounting end and the pipe engaging end. A mounting element is of one piece with one of the mounting end, the pipe engaging end and the intermediate section. A clamping member is used with the gasket. The clamping member is looped to assume an annular configuration. A retaining member extends through an aperture located in the mounting element and through the clamping member for retaining the clamping member to the gasket in a transport position of the gasket assembly.

Abstract: A sealing assembly for a liquid conveying system includes a first structure defining an aperture, such as a pipe receiving aperture. A second structure, such as a pipe is received in the aperture. And an annular seal is disposed within the aperture for radially sealing between the first structure and the second structure. The seal includes an outer radial portion embedded in the first structure and an inner radial portion in sealing engagement with the second structure. The inner radial portion defines an internal cavity containing a substantially incompressible fluid or gel that is movable within the cavity to provide a dynamic seal with the second structure.

Abstract: Method and apparatus for providing inserts, such as lift inserts and step inserts, in cast members. The inserts have breakaway tabs mounted in receiving slots in either a reusable holder or disk-shaped member. The assembled insert and holder are inserted through a collar on the outer jacket of a mold assembly and a locking pin passes through cooperating openings in the holder and collar to retain the lift insert/holder in place during the casting operation. The disk-shaped member is fixed to a jacket of the mold assembly. The breakaway tabs break away from the insert when the cast member is separated from the mold assembly, the breakaway tabs being discarded and the holder (disk-shaped member) being reusable many times for subsequent casting operations. The slots, in one embodiment, have a locking shoulder to lock the tabs in their slots. In another embodiment, a cam surface on the tabs lock the tabs in the slots.