Abstract: A retractable grappling hook generally comprising a shaft having a longitnal extending axis and a plurality of hooks pivotally attached to the shaft. Each hook has a longitudinally extending axis and is pivotal to a retracted position such that the axis of each hook is substantially parallel to the axis of the shaft and to an extended position such that the axis of each hook is angulated with respect to the axis of the shaft. The retractable grappling hook further comprises a hook control system on the shaft for configuring and locking the hooks in either the extended or retracted positions, and an attachment member attached to the shaft for attaching the grappling hook to other devices.

Abstract: An improved anchor comprising a central longitudinal stem, or flat bar, two cylindrical bars arranged symmetrically near one end of the flat bar and in a transversal sense, two triangular-shaped flukes each with a tubular base for insertion on the cylidnrical bars, the axial displacement being limited by washers and pins, each fluke turning independently with an amplitude between the flukes of at least 120.degree., the amplitude determined by the distance of two triangular tops from the central stem.

Abstract: A permanent mooring method and arrangement for embedding a permanent mooring device in the sea bottom calls for the lowering of the permanent mooring device into the sea until the bottom end contacts the sea bottom, the transmission of fluid under high pressure via a hollow tubular body of the permanent mooring device to a nozzle portion thereof so as to create a fluidized area in the sea bottom around the permanent mooring device and to wash the permanent mooring device into and beneath the sea bottom, followed by transmission of a cementitious substance via the hollow tubular body to the nozzle portion so as to fill the fluidized area in the sea bottom with the cementitious substance. The permanent mooring device is vibrated during transmission of the high-pressure fluid, transmission of the cementitious substance, or consolidation of the cementitious substance, or during any combination thereof to assist in the embedding process.

Abstract: Self-clearing anchor (10) having one or more arms (13) hinged to the stem (11), in the vicinity of the crown (12) of the anchor (10), cooperating with biassing member (17) to counteract the rotation of the arms (13), the arms being adapted, when subjected to a determined stress, to collapse beyond the crown (112) of the anchor (10). In the anchor, the biassing member (17) can be adjusted by appropriate regulation member (19).

Abstract: An anchor in which the flukes pivot on the shank about independent axes wh converge toward the anchor chain end of the shank. Lugs at the base of shank provide for mounting the pivots. The anchor is reversible and has support plates on either side of its base which act as stops to limit the extent that the plate-like flukes can close toward each other as the anchor is set.

Abstract: The disclosure relates to a device in collapsible anchors of the type having two shanks each with a sharp-pointed fluke. The ends of the shanks opposite the flukes are provided with inclined portions with through-holes. A bolt, suitably provided with a ring for an anchor line or chain extends through the holes. The bolt, which is intended to rest with an end abutment against one outer side of the mutually adjacent, inclined portions is provided with a resilient washer which fixes the portions in a parallel position. At least one section projecting radially from the bolt hole of one portion is located at a greater distance from the bolt hole than an opposing surface adjacent the second inclined portion. This opposing surface is located such that the projecting section is shiftable out of and into fixed position after shifting of the one inclined portion in a direction away from the second inclined portion against the action of the resilient washer.

Abstract: An anchor construction wherein two pairs of independently operating flukes are pivotally mounted at one end of an elongated shank. Each fluke of the primary pair of flukes lies on an opposite side of the shank and each fluke of the secondary pair of flukes lies on an opposite side of the primary flukes. Means are provided to simultaneously establish a relatively small angle between the primary flukes and the shank and a relatively large angle between the secondary flukes and the shank. This capability permits the anchor to be used interchangeably in either hard or soft bottom sediments without human intervention to reset fluke angles.