Provided are a washer that has a non-rotating function and does not damage an attachment surface at the time of fastening and loosening without increasing the number of components, and a fastening structure that prevents accompanying rotation of a bolt by applying the non-rotating function.

Disclosed is a washer 1 is used by being sandwiched between an attachment surface Sa of an object S to be attached and a nut 2 or a bolt head. A first annular protrusion 3 is formed on a side of the attachment surface Sa. An inner shape of the first annular protrusion 3 is larger than an outer shape of the nut 2 or the bolt head.

A fluid end having its fluid flow bores sealed without threading a retaining nut into the walls of each bore. The fluid ends may be assembled using a plurality of different kits that each comprise a fluid end body, a component, a retainer element, and a fastening system. The retainer element holds the component within each of the bores formed in the fluid end body and the fastening system secures the retainer element to the body. The fastening system comprises a plurality of externally threaded studs, washers and nuts in some embodiments. In other embodiments, the fastening system comprises a plurality of screws.

A fluid end having its fluid flow bores sealed without threading a retaining nut into the walls of each bore. The fluid ends may be assembled using a plurality of different kits that each comprise a fluid end body, a component, a retainer element, and a fastening system. The retainer element holds the component within each of the bores formed in the fluid end body and the fastening system secures the retainer element to the body. The fastening system comprises a plurality of externally threaded studs, washers and nuts in some embodiments. In other embodiments, the fastening system comprises a plurality of screws.

The invention relates to a connecting device (3) for mounting a wooden construction element (1), in particular in the form of a panel or beam, on a support (2a), wherein the connecting device (3) has a mounting node (4), which is designed for mounting the connecting device (3) on the support (2a), and a coupling arrangement (5), which is connected to the mounting node (4) and which, in the installed state, while projecting from the mounting node (4) on an upper side (1a) of the wooden construction element (1) can be connected to the latter by fastening members (7), which at least partially pass through the wooden construction element (1), wherein the mounting node (4) and the coupling arrangement (5) are each produced from a material which has a higher strength than that of the wooden construction element (1). The invention further relates to a wooden construction arrangement having a connecting device (3) according to the invention and to a structure having such a wooden construction arrangement.

Wheelchair designs and enhancements are provided for use with conventional wheelchair design. The designs and enhancements include bariatric extension panels and security features making it suitable for use in high security areas such as prisons and psychiatric wards.

Wheelchair designs and enhancements are provided for use with conventional wheelchair design. The designs and enhancements include bariatric extension panels and security features making it suitable for use in high security areas such as prisons and psychiatric wards.

An attachment device includes a flange, an upper shaft, and a lower shaft. The flange defines an upper surface and lower surface. The upper shaft projects from the upper surface and is centered about an upper longitudinal axis. The lower shaft projects from the lower surface and is centered about a lower longitudinal axis. The upper longitudinal axis is not collinear with the lower longitudinal axis. So configured, the attachment device allows two objects to be attached to each other with a lateral offset equal to the lateral offset between the upper shaft and the lower shaft.

An attachment device includes a flange, an upper shaft, and a lower shaft. The flange defines an upper surface and lower surface. The upper shaft projects from the upper surface and is centered about an upper longitudinal axis. The lower shaft projects from the lower surface and is centered about a lower longitudinal axis. The upper longitudinal axis is not collinear with the lower longitudinal axis. So configured, the attachment device allows two objects to be attached to each other with a lateral offset equal to the lateral offset between the upper shaft and the lower shaft.

An elastomeric collar has a body portion with a generally cylindrical shape from a first end portion to a second end portion and defining a through opening extending along a central axis. A first annular flange is connected to and extends radially outward from the first end portion of the body portion. A second annular flange is connected to and extends radially outward from the second end portion of the body portion, where the second annular flange is axially spaced by a gap from the first annular flange. The body portion, the first annular flange, and the second annular flange are made of an elastomer having a durometer of at least 40A.

An elastomeric collar has a body portion with a generally cylindrical shape from a first end portion to a second end portion and defining a through opening extending along a central axis. A first annular flange is connected to and extends radially outward from the first end portion of the body portion. A second annular flange is connected to and extends radially outward from the second end portion of the body portion, where the second annular flange is axially spaced by a gap from the first annular flange. The body portion, the first annular flange, and the second annular flange are made of an elastomer having a durometer of at least 40A.