Abstract: A spring drive system for a window shade includes a housing, a plurality of rotary members, a spring and a latch. The rotary members are rotationally linked to one another and pivotally connected with the housing, wherein the rotary members include a rotary drum that is connected with a suspension member and is rotatable relative to the housing for winding or unwinding the suspension member. The spring is assembled with the housing, and can bias the rotary drum in rotation for winding the suspension member. The latch is assembled with the housing, the latch being movable to engage with and disengage from one of the rotary members to respectively prevent and allow rotation of the rotary drum.

Abstract: Some embodiments of the present disclosure provide a roof component of a railway vehicle, and a railway vehicle. The roof component of a railway vehicle includes: two upper boundary beams, the two upper boundary beams being provided at an interval; a camber beam component, the camber beam component being provided between the two upper boundary beams; and a transitional structure, provided on the camber beam component, the transitional structure being connected with at least one of the two upper boundary beams. The technical solution of the present disclosure solves the problem in the conventional art of inconvenient connection between a camber beam component and an upper boundary beam, and a transitional structure of the present application facilitates processing and forming.

Abstract: A universal slab removal device for picking up and moving large slabs of cement, concrete or any other types of heavy solid material using any type of lifting machine. The universal slab removal device includes an anchor assembly including an elongated anchor member adapted to be fastened to a slab of heavy solid material such as cement, pavement, and stone and be lifted with a lifting apparatus such as a fork lift and the like.

Abstract: A landscaping post guard comprising a base, a lower collar and an upper collar is disclosed. The base comprises a side wall having an upper lip, a tray extending inwardly from the side wall below the upper lip, a central opening, and a raised lip around said central opening. The lower collar fits inside of the side wall, below the tray. The upper collar fits inside of said raised lip around said central opening. A guard comprising a planar sheet that connects a raised peripheral rim to a central upwardly extending wall is also disclosed. Tabs extend inwardly from an upper portion of the inner wall and a slit extends from the raised peripheral rim to the central wall. A spike band may be secured to the peripheral rim.

Abstract: Construction and remodeling of a cleanroom wall system is facilitated with a universal stud design. A variety of wall configurations may be assembled with the same stud. Also provided is a useful connector block for joining perpendicularly oriented studs, or for splicing together axially aligned studs. A corner stud is also provided, as well as a deflection track for connecting the top track of a wall panel to a conventional ceiling grid to allow deflection of the grid relative to the wall and to facilitate easy access to the portion of the ceiling immediately above the wall panel.

Abstract: A gate valve box adaptor structure, the present invention provides a permanent support for the key box bonnet that is unaffected by the surrounding environment. The adaptor is supported on the gate valve to a positive location for the key box bonnet at a level which prevents infiltration of soil and moisture into the bonnet. The adaptor is provided with a resilient gasket of a unique design to provide a cushion and to create a seal for the bonnet on the gate valve. A plurality of liquid infiltration prevention structures for preventing liquid infiltration into manhole assemblies.

Abstract: Doorway or passageway arches and a mold and method for making doorway arches, wherein the arches comprise pre-fabricated plaster, two sides that are substantially perpendicular to each other, a concave arcuate side extending between the sides and flanges extending outward from each side for securing the arch to adjoining walls defining a comer, and the mold comprises a base, at least two perpendicularly disposed slots, at least one slidably insertable and removable board for each slot, a mold projecting upward from said base and having a convex side extending between opposing ends of said boards, flanges disposable along the boards and a volume for receiving a hardening agent, such as plaster.

Abstract: A runner for maintaining at least two studs in a predetermined relationship relatively to one another so as to allow for the construction walls presenting a laterally curved portion, walls erected in a space where the distance between a floor and a ceiling varies or half walls having a figured upper end. Each runner includes at least two stud receiving components. Each of the stud receiving components is configured and sized for receiving one of the stud end portions. Each stud receiving component is provided with a linking structure mounted thereon for mechanically linking with an adjacent stud receiving component while allowing the linked stud receiving components to be angled relatively to each other. Each stud receiving component has a generally U-shaped cross-sectional configuration defining a base wall. The base wall has a base wall peripheral edge.

Abstract: A roofing structure assembly comprises elongate roofing material support members including means for attachment to roofing scaffold members and a flexible roofing material engageable with said support members, in which the support members include means for tensioning the roofing material between adjacent support members in use.The roofing material is preferably supported above the scaffold members and is tensioned by applying invented channel section capping members over the support members to apply out-of-plane deformation to the roofing material.