A fluid-powered linear motor with rotary pistons is disclosed. An application is for a downhole motor but it could be used in other applications. Rotational pistons provide increased torque generation as the torque generated is proportional to motor length. Since downhole drills are long (generally up to a maximum length of 30 ft.), a high-torque motor can be produced using this method. A pressurized fluid is used to drive the piston assemblies to produce bit shaft power. This concept employs rotary pistons and a mechanical rectifier to convert the rotational reciprocation produced by a reciprocating rotational piston into continuous rotary motion.

A fastening device for supporting, hanging, holding and threading, includes: a shank with an aperture formed therethrough which can but doesn't have to include a built up area of material around it. The shank has two ends one end (head) is configured to be driven into by a driving tool such as a hammer, for securing the second pointed end into a member for securing the shank therewithin.

An anchor assembly for hanging an object on a wall includes a first anchor component and a second anchor component. The first anchor component includes a base having front, back, top, bottom, left and right sides, and at least one wall penetrating retainer extending from the base and having a wall penetrating extent that protrudes rearwardly of the base and has a downwardly curved configuration. The second anchor component includes a base having front, back, top, bottom, left and right sides, at least one wall penetrating retainer extending from the base of the second anchor component and having a wall penetrating extent that protrudes rearwardly of the base of the second anchor component and has a curved configuration. The second anchor component is pivotably associated with the first anchor component for movement between an anchoring orientation and a non-anchoring orientation.

Fastening devices and methods of utilizing the same. The fastening devices include a handle, a trigger mechanism, a fastener magazine, a fastening head, and a tab feed structure. The tab feed structure includes a tab magazine, a feed rail, and a tab advance mechanism. The tab magazine is configured to contain an accordion-folded stack of tabs, which is defined by a first subset of a plurality of interconnected tabs. The fasting device is configured to, upon actuation of the trigger mechanism, urge a fastener through a leading tab of the plurality of interconnected tabs and into a workpiece to operatively affix the leading tab to the workpiece and also to advance a tab strip, which is defined by a second subset of the plurality of interconnected tabs, toward a fastening region with the tab advance mechanism. The methods include methods of utilizing and/or loading the fastening device.

A hidden fastener and associated method for attaching decking members with side grooves to a support member includes a cross member and an elongate anchoring member. The cross member has a body with a front and rear end and defines a hole. The front end has at least one prong and the rear end includes a bent wing. At least one leg extends downward from the body intermediate the front and rear ends. Each of the front and rear ends are configured to engage with the groove of adjacent decking members. The front end is inserted into the groove of a leading decking member and the anchoring member is driven through the hole into the support member. A trailing decking member is placed with the rear end in the groove adjacent the leading decking member.

A hidden fastener and associated method for attaching decking members with side grooves to a support member includes a cross member and an elongate anchoring member. The cross member has a body with a front and rear end and defines a hole. The front end has at least one prong and the rear end includes a bent wing. At least one leg extends downward from the body intermediate the front and rear ends. Each of the front and rear ends are configured to engage with the groove of adjacent decking members. The front end is inserted into the groove of a leading decking member and the anchoring member is driven through the hole into the support member. A trailing decking member is placed with the rear end in the groove adjacent the leading decking member.

According to one embodiment, an insulated structure includes a frame comprising a plurality of wall studs coupled together and a plurality of foam boards attached to the frame to form a continuous insulative wall. A plurality of fasteners attaches the foam boards to the frame. Each fastener includes an elongate shaft and a cap. The elongate shaft is configured to penetrate through a foam board and into a wall stud to couple the components together. The cap is configured to be positioned atop a foam board to distribute a load relatively evenly to the foam board. A sealing tape is applied across seams between adjacent foam boards and over the fasteners' caps to seal the wall. A sealing caulk is applied to secondary fasteners and penetrations to seal the wall. In some embodiments, the structure has a fastener density of about 1 fastener per 243 in.sup.2 of foam board.

According to one embodiment, an insulated structure includes a frame comprising a plurality of wall studs coupled together and a plurality of foam boards attached to the frame to form a continuous insulative wall. A plurality of fasteners attaches the foam boards to the frame. Each fastener includes an elongate shaft and a cap. The elongate shaft is configured to penetrate through a foam board and into a wall stud to couple the components together. The cap is configured to be positioned atop a foam board to distribute a load relatively evenly to the foam board. A sealing tape is applied across seams between adjacent foam boards and over the fasteners' caps to seal the wall. A sealing caulk is applied to secondary fasteners and penetrations to seal the wall. In some embodiments, the structure has a fastener density of about 1 fastener per 243 in.sup.2 of foam board.

An adjustable fastening system includes a first member and a second member. The first member includes a plurality of fingers radially positioned about a central longitudinal axis, and a plurality of notches, with one of the notches disposed between an adjacent pair of the fingers. The second member is attached to the first member, and moves axially along the central longitudinal axis, relative to the first member, in response to rotational movement about the central longitudinal axis. The second member includes a plate having a protuberance extending radially outward from the central longitudinal axis. The protuberance is positioned within one of the plurality of notches, and in interlocking engagement with two of the plurality of fingers, to resist rotation of the second member relative to the first member about the central longitudinal axis.

A wall anchors in the form of a base with one or more wall penetrating retainers having respective wall penetrating extents that are curved. The retainers and base are configured to enable manual insertion onto wall without the use of tools.