The invention relates to a playground comprising a number of pillars of a circular cross sectional area, and a series of playground elements including floor panels and side panels, and a series of brackets for attachment of the playground elements to the pillars. The brackets comprise an element coupling portion adapted to be fastened to a playground element and a pillar coupling portion adapted to be fastened to a side portion of a pillar. Here, the pillar coupling portion comprising a contact face curved to lie against pillar and a boring for receiving a fastening member which is oriented such that the bracket when fastened to the pillar is attached by the fastening member inserted from the bracket and into the pillar in a radial direction of the pillar. The series of brackets comprises brackets with element coupling portions adapted to be fastened to each of the playground elements in the series of playground elements, and all the brackets in the series comprise essentially identical pillar coupling portions such that all the brackets are adapted to be attached to the pillars in the same way. The invention also relates to a method of assembling such a playground. The series of playground elements may include floor panels, side panels, a series of bars of predefined diameters and chains.

A quick-release device is for securing a rod of any gas cylinder into the plate of any chair, item of furniture, or other device supported by a gas cylinder and activating the rod with a button thereon. This universal quick-release device includes a sleeve in in the seat plate, an adapter fit into the sleeve, the adapter including an upper portion and a lower portion with different inner and outer diameters. The sleeve is configured to receive the lower portion of the adapter in a press-fit engagement. The upper portion is configured to receive the rod of the gas cylinder in a removable engagement.

A kit of parts for use in demountably configuring a variety of structural assemblies. A kit may comprise a plurality of cylindrical structural components configured for engagement with various types of male connector components along the sides or at the ends of the cylindrical structural components, there provided for demountable engagement of a female-end socket component at the end of another cylindrical structural component. The kit may additionally comprise components for one or more of roller carriage assemblies and/or one or more of sliding carriage assemblies configured for rolling or sliding movement along rail assemblies comprising a plurality of cylindrical, square, rectangular, or octagonal track components. The rail assemblies may be supported by bases comprising the cylindrical structural components and other components such as weight components, as well as threaded foot components or threaded caster components on which the rail assemblies can be adjustably levelled.

Fire hose couplings and adapters are configured to receive, by any of various types of interconnections, a wide range of attachments enhancing the utility of the associated fire hose. The attachments are secured to the coupler or adapter by way of an appropriate locking engagement, such as by a dovetail connector, setscrews, chemical attachment, adhesives and the like. The attachments cover a broad range of handles, reflective and directional devices, analog and digital sensors/monitors/indicators, and carabiners, and both threaded and unthreaded studs adapted for appropriate receipt of any of a broad range of attachments or uses.

A quick release connecting assembly is provided. The quick release connecting assembly includes a first connector and a second connector, wherein the first connector includes an upper fixed plate, a middle portion of the upper fixed plate is connected to a connecting column, and a clamping slot is formed in a middle portion of the connecting column; and the second connector includes a lower fixed plate, a middle portion of the lower fixed plate is connected to a connecting pipe matched with the connecting column, a side surface of the connecting pipe is connected to a side pipe communicating with the connecting pipe, and a bolt column is arranged in the side pipe. The connecting column of the first connector and the bolt column of the second connector are clamped, such that the quick release connecting assembly is simple in integral structure and convenient to disassemble and assemble.

A spin nut is operable to attach to a threaded fastener such as a rod. The spin nut includes a threaded nut having a shoulder for supporting a bracket, and a snap retainer detachably coupled to the threaded nut operable to spin onto any position on the threaded rod. At least one wing is formed on the snap retainer operable to attach to a bracket having a hole and spin to adjust to a position on the threaded rod. The snap retainer is detachably couple the plurality of sectioned threaded nut sections operable to spring open on a side opposite the band to allow the threaded rod to pass through.

A mounting device including a base having an open bottom, a longitudinal axis, and a linear guide on the base. The linear guide guides support hardware in linear movement along the longitudinal axis. An internal cavity is under the base for containing a sealant against and in cooperation with a roof when the mounting device is secured to the root. An opening is though the base is for receiving a fastener when the mounting device is secured to the roof. The opening is in communication with the internal cavity. The linear guide extends beyond the internal cavity.

A fixture for connecting a pole to a surface comprises a mounting plate, a receiver, and at least one locking mechanism. The mounting plate having a mounting plate perimeter defining a mounting plate top surface and a mounting plate bottom surface. The mounting plate comprising at least two mounting holes. The receiver being attached to the mounting plate top surface. The receiver comprising at least one sidewall defining a hollow interior and at least one locking hole passing through the sidewall. The at least one locking mechanism configured to interact with the at least one locking hole.

Fire hose couplings and adapters are configured to receive, by any of various types of interconnections, a wide range of attachments enhancing the utility of the associated fire hose. The attachments are secured to the coupler or adapter by way of an appropriate locking engagement, such as by a dovetail connector, setscrews, chemical attachment, adhesives and the like. The attachments cover a broad range of handles, reflective and directional devices, analog and digital sensors/monitors/indicators, and carabiners, and both threaded and unthreaded studs adapted for appropriate receipt of any of a broad range of attachments or uses.

A locking rail for locking of a first and a second panel horizontally. The panels each include an essentially vertical panel surface and an essentially horizontal edge surface. The locking rail includes a first and a second locking device which are configured to engage the edge surface of the first and the second panel, respectively, and an interconnecting extension which extends between said first and second locking device. The first and second locking device each includes a first locking tongue which extends essentially perpendicular to the interconnecting extension. The first locking tongue of the first locking device is configured for locking of the first panel in a first horizontal direction and the first locking tongue of the second locking device is configured for locking of the second panel in the first horizontal direction. The locking rail includes a first locking part which extends essentially perpendicular to the interconnecting extension.