Abstract: A wear-resistant hydraulic fracturing pump valve seat including a body of the valve seat extending radially away from a central axis. The valve seat includes a first top surface configured to form a metal seal with a first bottom surface of a valve head, the first bottom surface positioned closest to a base of the valve head. The valve seat further includes a valve seat step positioned directly adjacent and above the first top surface and a second top surface disposed directly adjacent to and above the valve seat step. The second top surface is configured to form a second metal seal with a second bottom surface of the valve head. The valve seat step is configured to place the first top surface and the second top surface in different parallel planes from each other.

Abstract: A valve seat for a valve assembly for a high-pressure fluid pump is disclosed. The valve assembly includes a valve body, and a valve seat fabricated of a first material. The valve seat has a generally a tubular body having an annular collar having an outer diameter surface extending beyond the outer diameter surface of the tubular body, and an annular insert fabricated of a second material more durable than the first material and affixed to form an inner diameter surface of the collar, the insert forming an annular sealing surface against which the valve body abuts when in a closed position. The insert forms an annular ledge edge at its inner diameter surface that is offset from the inner diameter surface of the tubular body to form an annular chamfered edge.

Abstract: A packing assembly providing a seal point configurable at multiple locations. The packing assembly includes a soft bed having at least one energizing ring and at least one seal ring. The assembly includes a spacer ring sealable with the at least one energizing ring. The assembly further includes at 1=least one adapter ring abutting either end of the soft bed to provide two seal locations relative to the spacer ring.

Abstract: The present disclosure relates, to a wear-resistant hydraulic fracturing pump valve for use in a valve housing, the wear-resistant hydraulic fracturing pump valve comprising: (a) a valve head extending radially from a central axis, the valve head comprising: (i) a first bottom surface comprising a metal and positioned closest to a base of the valve head, wherein the first bottom surface is configured to form a metal seal with a top surface of a valve seat; and (ii) a first annular groove positioned directly adjacent and above the first bottom surface; and (b) a first wear-resistant pump valve gasket configured to mount inside the first annular groove and to form a valve gasket seal with the top surface of the valve seat.

Abstract: A portable monitoring unit for personnel working in hazardous environments, including a coupling to which an auxiliary unit can be structurally coupled; a motion sensor; an alert generator which is configured to generate an alert when motion is not detected for a period of time; and a power interface arranged to receive power for the portable monitoring unit from a power interface of the auxiliary unit when the auxiliary unit is structurally coupled to the portable monitoring unit.

Abstract: A valve seat for a valve assembly for a high-pressure fluid pump is disclosed. The valve assembly includes a valve body, and a valve seat fabricated of a first material. The valve seat has a generally a tubular body having an annular collar having an outer diameter surface extending beyond the outer diameter surface of the tubular body, and an annular insert fabricated of a second material more durable than the first material and affixed to form an inner diameter surface of the collar, the insert forming an annular sealing surface against which the valve body abuts when in a closed position. The insert forms an annular ledge edge at its inner diameter surface that is offset from the inner diameter surface of the tubular body to form an annular chamfered edge.

Abstract: A valve member for an inlet or outlet valve assembly of a reciprocating pump assembly includes a valve body and a seal member. The valve body comprises a first body surface and a second body surface that extend circumferentially about the valve body. The valve body defines a body axis and an annular cavity. The seal member is positioned at least partially within the annular cavity of the valve body such that an outer seal portion of the seal member extends between the first body surface and the second body surface of the valve body. The outer seal portion of the seal member comprises a first seal surface and a second seal surface. The first body surface, the first seal surface, and the second seal surface extend at different angles relative to the body axis.

Abstract: The present disclosure relates, to a wear-resistant hydraulic fracturing pump valve for use in a valve housing, the wear-resistant hydraulic fracturing pump valve comprising: (a) a valve head extending radially from a central axis, the valve head comprising: (i) a first bottom surface comprising a metal and positioned closest to a base of the valve head, wherein the first bottom surface is configured to form a metal seal with a top surface of a valve seat; and (ii) a first annular groove positioned directly adjacent and above the first bottom surface; and (b) a first wear-resistant pump valve gasket configured to mount inside the first annular groove and to form a valve gasket seal with the top surface of the valve seat.

Abstract: A packing assembly providing a seal point configurable at multiple locations. The packing assembly includes a soft bed having at least one energizing ring and at least one seal ring. The assembly includes a spacer ring sealable with the at least one energizing ring. The assembly further includes at 1=least one adapter ring abutting either end of the soft bed to provide two seal locations relative to the spacer ring.

Abstract: A portable monitoring unit for personnel working in hazardous environments, comprising a coupling to which an auxiliary unit can be structurally coupled; a motion sensor; an alert generator which is configured to generate an alert when motion is not detected for a period of time; and a power interface arranged to receive power for the portable monitoring unit from a power interface of the auxiliary unit when the auxiliary unit is structurally coupled to the portable monitoring unit.

Abstract: A valve member for an inlet or outlet valve assembly of a reciprocating pump assembly includes a valve body and a seal member. The valve body comprises a first body surface and a second body surface that extend circumferentially about the valve body. The valve body defines a body axis and an annular cavity. The seal member is positioned at least partially within the annular cavity of the valve body such that an outer seal portion of the seal member extends between the first body surface and the second body surface of the valve body. The outer seal portion of the seal member comprises a first seal surface and a second seal surface. The first body surface, the first seal surface, and the second seal surface extend at different angles relative to the body axis.

Abstract: Housing (10) of a closed circuit breathing apparatus (200), includes a primary wall (20) covering a component space (30) for receiving breathing components (210) of the closed circuit breathing apparatus (200). A secondary wall (40) covers a device space (50) at least partly inside of the component space (30). The device space (50) is sealed by the secondary wall (40) against the component space (30). The device space (50) receives an electric device (100). The device space (50) includes a device opening (52) to the surrounding of the housing (10). The device opening (52) is for inserting the electric device (100).

Abstract: An LED adapter to retrofit non-LED light fixtures to accept LED lights without electrical rewiring. The LED adapter includes a multi-use base plug that is configured to connect to the socket on the non-LED light fixture and a universal LED plug configured to connect to the socket on an LED light. The multi-use base plug may be a four-pin square base, a two-pin (aligned or off-set) square base, a two-pin tombstone base, a two-pin oval base, or a threaded base. The adapter may also include a power regulator disposed between the universal LED plug and the multi-use base plug. The power regulator includes one or more resistor to adjust the current or voltage supplied by the non-LED light fixture so as to be compatible with the LED light fixture.

Abstract: An LED adapter to retrofit non-LED light fixtures to accept LED lights without electrical rewiring. The LED adapter includes a multi-use base plug that is configured to connect to the socket on the non-LED light fixture and a universal LED plug configured to connect to the socket on an LED light. The multi-use base plug may be a four-pin square base, a two-pin (aligned or off-set) square base, a two-pin tombstone base, a two-pin oval base, or a threaded base. The adapter may also include a power regulator disposed between the universal LED plug and the multi-use base plug. The power regulator includes one or more resistor to adjust the current or voltage supplied by the non-LED light fixture so as to be compatible with the LED light fixture.

Abstract: An LED adapter to retrofit non-LED light fixtures to accept LED lights without electrical rewiring. The LED adapter includes a multi-use base plug that is configured to connect to the socket on the non-LED light fixture and a universal LED plug configured to connect to the socket on an LED light. The multi-use base plug may be a four-pin square base, a two-pin (aligned or off-set) square base, a two-pin tombstone base, a two-pin oval base, or a threaded base. The adapter may also include a power regulator disposed between the universal LED plug and the multi-use base plug. The power regulator includes one or more resistor to adjust the current or voltage supplied by the non-LED light fixture so as to be compatible with the LED light fixture.

Abstract: A retrofit panel for a ceiling-mounted light fixture. The panel may comprise a lens, screen, diffuser, or LED light screen. Anchor line assemblies and retainer arm assemblies extend from a perimeter guide track from which they extend. The anchor line assemblies engage one or more ports on the light fixture housing and hold the retrofit panel a maximum anchor distance from the housing. The retainer arm assemblies engage one or more openings on the light fixture housing and hold the retrofit panel flush with the light fixture housing or the ceiling if recess mounted. The retrofit panel can be easily installed in existing ceiling mounted light fixtures with minimal demolition.

Abstract: A retrofit panel for a ceiling-mounted light fixture. The panel may comprise a lens, screen, diffuser, or LED light screen. Anchor line assemblies and retainer arm assemblies extend from a perimeter guide track from which they extend. The anchor line assemblies engage one or more ports on the light fixture housing and hold the retrofit panel a maximum anchor distance from the housing. The retainer arm assemblies engage one or more openings on the light fixture housing and hold the retrofit panel flush with the light fixture housing or the ceiling if recess mounted. The retrofit panel can be easily installed in existing ceiling mounted light fixtures with minimal demolition.

Abstract: A retrofit panel for a ceiling-mounted light fixture. The panel may comprise a lens, screen, diffuser, or LED light screen. Anchor line assemblies and retainer arm assemblies extend from a perimeter guide track from which they extend. The anchor line assemblies engage one or more ports on the light fixture housing and hold the retrofit panel a maximum anchor distance from the housing. The retainer arm assemblies engage one or more openings on the light fixture housing and hold the retrofit panel flush with the light fixture housing or the ceiling if recess mounted. The retrofit panel can be easily installed in existing ceiling mounted light fixtures with minimal demolition.

Abstract: There is disclosed self-contained breathing apparatus equipment 20 comprising a harness 22, 62 comprising a structural member 26, 28, 64 for supporting or housing a cylinder of breathable gas 40. The equipment comprises a visual alert generator 54 comprising a light source 60, 76 mounted to the structural member, the visual alert generator having a plurality of display modes, a wireless receiver 50 arranged to receive telemetry data transmitted from a central control unit 16, and a control module 52 arranged to receive status data, the status data including the telemetry data. The control module 52 is arranged to control the display mode of the visual alert generator based on the received status data.

Abstract: A computer-based method and apparatus for knowledge discovery from databases. The disclosed method involves the user creation of a project plan comprising a plurality of operational components adapted to cooperatively extract desired information from a database. In one embodiment, the project plan is created within a graphical user interface and consists of objects representing the various functional components of the overall plan interconnected by links representing the flow of data from the data source to a data sink. Data visualization components may be inserted essentially anywhere in the project plan. One or more data links in the project plan may be designated as caching links which maintain copies of the data flowing across them, such that the cached data is available to other components in the project plan. In one embodiment, compression technology is applied to reduce the overall size of the database.