Indicator device (90), for indicating proper alignment of bolt-and-nut holes of two abutting flanges (72,72) of two tower sections (2,5) of a wind turbine tower structure (1), the indicator device (90) comprising a connector (122) for connecting the indicator device (90) to an inner face (71) of one of the flanges, and a body (100) having a first body end (101) and an opposite second body end (112) closer to the connector (122), the indicator device (90) including a resiliently deformable part (150), a pneumatic system or a hydraulic system allowing for the indicator device (90) to assume a normal configuration wherein the first body end (101) is distant from the connector (122), and a second configuration wherein the first body end (101) is located closer to the connector (122), the resiliently deformable part or pneumatic system or hydraulic system urging the first body end (101) from the second configuration towards the first configuration.

Indicator device (90), for indicating proper alignment of bolt-and-nut holes of two abutting flanges (72,72) of two tower sections (2,5) of a wind turbine tower structure (1), the indicator device (90) comprising a connector (122) for connecting the indicator device (90) to an inner face (71) of one of the flanges, and a body (100) having a first body end (101) and an opposite second body end (112) closer to the connector (122), the indicator device (90) including a resiliently deformable part (150), a pneumatic system or a hydraulic system allowing for the indicator device (90) to assume a normal configuration wherein the first body end (101) is distant from the connector (122), and a second configuration wherein the first body end (101) is located closer to the connector (122), the resiliently deformable part or pneumatic system or hydraulic system urging the first body end (101) from the second configuration towards the first configuration.

A land-based drilling rig includes a first substructure and a second substructure, the second substructure being positioned generally parallel to the first substructure. The land-based drilling rig also includes a drill rig floor coupled to the first and second substructures, the drill rig floor including a V-door. The side of the drill rig floor has the V-door defining a V-door side of the drill rig floor, where the V-door side of the drill rig floor is parallel to the first substructure. The first and second substructures pivotably support the drill rig floor. The land-based drilling rig also includes a mast, the mast mechanically coupled to one or more of the first substructure, the second substructure, and the drill rig floor. The mast is pivotably coupled to one or more of the first substructure, the second substructure, and the drill rig floor by a mast pivot point. The mast includes a V-door side, the V-door side of the mast parallel to the first or second substructure. In addition, the land-based drilling rig includes a mast hydraulic lift cylinder coupled to the mast at a mast lift point and a choke manifold, the choke manifold positioned on the drill rig floor.

A system for raising a mast includes a primary cylinder and an actuator. The primary cylinder has a first end coupled to the mast and a second end coupled to a lifting base. The primary cylinder actuates from a retracted position to an extended position to at least partially raise the mast. The actuator actuates from a retracted position to an extended position to at least partially raise the mast, thereby moving the first end of the primary cylinder or the second end of the primary cylinder toward a pivot point between the mast and the lifting base.

Systems for assembling a wind turbine without the assistance of cranes. According to some implementations a system is provided that includes lifting systems having lifting platforms arranged peripherally around the tower. The lifting platforms cooperate with different connection tools that can be supported on an auxiliary column and thus lift or lower the tower modules.

There is provided a pole system suitable for supporting other objects such as bird feeders, plants and the like, the pole system having a pole with at least one transversely extending aperture formed therein, a pin mounted in the aperture and extending exteriorly of the pole on opposite sides thereof, and a hub member having a bottom surface, the bottom surface including a scalloped wall which is arranged to receive the pin such that the hub member is supported, the scalloped wall permitting rotation of the hub when sufficient rotational force is applied thereto.

A deployable boom structure is provided that, in one embodiment, includes one or more perforated tapes, a drive mechanism with a sprocket mechanism for engaging each of the perforated tapes to transition the tapes between an undeployed state and a deployed state, and three battens that each extend between the tapes. At least one of the battens is a sliding batten, i.e., a batten that engages each of the tapes but through which each of the tapes can slide. Lanyards and detents cooperate to fix the location of a sliding batten relative to the tapes after a predetermined length of each of the tapes has slid through the batten. In a particular embodiment, the deployable boom structure is coupled with a solar blanket that can be Z-folded.

A deployable boom structure is provided that, in one embodiment, includes one or more perforated tapes, a drive mechanism with a sprocket mechanism for engaging each of the perforated tapes to transition the tapes between an undeployed state and a deployed state, and three battens that each extend between the tapes. At least one of the battens is a sliding batten, i.e., a batten that engages each of the tapes but through which each of the tapes can slide. Lanyards and detents cooperate to fix the location of a sliding batten relative to the tapes after a predetermined length of each of the tapes has slid through the batten. In a particular embodiment, the deployable boom structure is coupled with a solar blanket that can be Z-folded.

A section of concrete intended to form a mast for a windmill, the section including a first portion including a first flange, a second portion including a second flange, a prestressing device including at least one visible part located between the first flange and the second flange, a first attaching device arranged to be connected to the first flange, and/or a second attaching device arranged to be connected to the second flange.

The tower, applicable in the installation of wind turbines, comprises: a lower end (11) having a general polygonal configuration formed by flat sides (12) and cylindrical portions (13) arranged between consecutive flat sides (12); the flat sides (12) having a decreasing width in the upward direction throughout the tower (1), and the cylindrical portions (13) having an invariable shape throughout the tower (1); the tower (1) having, at its top end (11), a circular outline made by the cylindrical portions (13), which maintain an invariable shape throughout the tower (1). The invention includes a climbing formwork device for building the tower.