Abstract: Device and method for protecting a submersible pump. The device can include a housing for connecting to a downhole pump, and a plurality of shelves disposed throughout the housing, wherein at least two shelves are axially spaced from one another, and each shelf provides a surface for supporting and collecting sand or other solids within the housing. A restrictor assembly can be disposed at one end of the housing and configured to allow fluid flow through the housing in one direction and at least partially restrict flow through the housing in an opposite, second direction.

Abstract: A computing device is described that outputs a radial interface. The computing device accesses a list that includes multiple time-based events that have a particular duration. The computing device selects, based on the list and the duration of each time-based event, a subset of time-based events determined such that a sum of the durations for each event in the subset is less than or equal to an hour. An order of the events in the subset is the same as in the list. The computing device generates a graphical user interface that includes a graphical selector and a number of graphical representations equal to the number of events in the subset, each graphical representation corresponding to a different event from the subset, arranged around the selector, and having a size proportional to the duration of the event corresponding to the respective representation. The computing device outputs, for display, the interface.

Abstract: A computing device is described that outputs a radial interface. The computing device accesses a list that includes multiple time-based events that have a particular duration. The computing device selects, based on the list and the duration of each time-based event, a subset of time-based events determined such that a sum of the durations for each event in the subset is less than or equal to an hour. An order of the events in the subset is the same as in the list. The computing device generates a graphical user interface that includes a graphical selector and a number of graphical representations equal to the number of events in the subset, each graphical representation corresponding to a different event from the subset, arranged around the selector, and having a size proportional to the duration of the event corresponding to the respective representation. The computing device outputs, for display, the interface.

Abstract: A computing device is described that outputs a radial interface. The computing device accesses a list that includes multiple time-based events that have a particular duration. The computing device selects, based on the list and the duration of each time-based event, a subset of time-based events determined such that a sum of the durations for each event in the subset is less than or equal to an hour. An order of the events in the subset is the same as in the list. The computing device generates a graphical user interface that includes a graphical selector and a number of graphical representations equal to the number of events in the subset, each graphical representation corresponding to a different event from the subset, arranged around the selector, and having a size proportional to the duration of the event corresponding to the respective representation. The computing device outputs, for display, the interface.

Abstract: A computing device is described that outputs a radial interface. The computing device accesses a list that includes multiple time-based events that have a particular duration. The computing device selects, based on the list and the duration of each time-based event, a subset of time-based events determined such that a sum of the durations for each event in the subset is less than or equal to an hour. An order of the events in the subset is the same as in the list. The computing device generates a graphical user interface that includes a graphical selector and a number of graphical representations equal to the number of events in the subset, each graphical representation corresponding to a different event from the subset, arranged around the selector, and having a size proportional to the duration of the event corresponding to the respective representation. The computing device outputs, for display, the interface.

Abstract: The invention relates to a freestanding wall section and a method of constructing a wall. The invention provides a wall section for use in building a wall comprising: a wall portion having a front face portion and a rear face portion; a connecting portion connecting said front face portion to said rear face portion and defining a cavity therebetween; in which the connecting portion has an aperture for receiving concrete mix and which in use allows the concrete mix to fill said cavity. The invention also provides a method of building a wall using such wall sections.

Abstract: A method for manufacturing hollow-core concrete slabs, the method comprising: preparing a mould by suspending in the mould between first and second end-pieces a plurality of substantially parallel elongate void formers; filling the mould with a wet concrete mix up to the crown of the void formers; laying an inert pliable filamentary sheet on the surface of the concrete with filaments of the sheet extending transverse to the long axes of the elongate void formers, the filamentary sheet being restrained so as to resist movement of the concrete mix when the void formers are withdrawn from the mix; further filling the mould with the wet concrete mix over the filamentary sheet; and, subsequently forming hollow channels in the wet concrete mix by withdrawing the plurality of void formers from the concrete mix through the second end-piece.

Abstract: The invention relates to a freestanding wall section and a method of constructing a wall. The invention provides a wall section for use in building a wall comprising: a wall portion having a front face portion and a rear face portion; a connecting portion connecting said front face portion to said rear face portion and defining a cavity therebetween; in which the connecting portion has an aperture for receiving concrete mix and which in use allows the concrete mix to fill said cavity. The invention also provides a method of building a walk using such wall sections.

Abstract: This invention relates to a unit (1) for compacting waste prior to disposal. The invention provides A waste compaction unit (1) for fitting into a housing comprising a lid (3) and an interior (4) for collecting waste, the compaction unit (1) comprising a plunger (7) comprising bellows housable in said lid (3); a pump connectable to the plunger (7); and a compaction tube (6) arrangeable to partially extend into the bin interior (4) wherein the pump is arranged in operation to inflate the bellows to extend the plunger (7) axially along the compactor tube towards the interior (4) such that any waste collected therein is compacted.

Abstract: The present invention relates to a method and apparatus for manufacturing a moulded concrete unit. It is particularly although not exclusively applicable to moulding of a concrete unit suitable for use as a section for a freestanding wall. The invention provides a method for moulding a concrete unit having an aperture, comprising the steps of pouring concrete into a mould having walls substantially perpendicular to a base of the mould, and including a plurality of aperture defining walls; removing at least one of said aperture defining walls once the concrete is partially set; and removing the unit from the mould once the concrete unit is sufficiently set to allow removal. The invention also provides for use in such a method.