A marine anchor is described which has a shank having a leading end for attachment to a cable and a general double-bladed ploughshare shaped fluke fixed to the shank with the blades disposed symmetrically about the median plane of the shank. The leading ends of the blades terminate in a single apex and the trailing ends of each blade diverges outwardly from said medial plane, each blade having a generally inwardly dished shape. The blades can be curved or consist of at least two flat angled surfaces.
A fixed shank plow anchor includes a weighted nose having a spike incorporated into it to enhance deployment of the anchor on the sea bed. The center of gravity of the anchor is situated within the shank so that when the anchor drops onto a sea bed, and force is applied to the end of the shank in a forward direction, an overturning moment is created facilitating digging of the nose of the anchor into the sea bed. The anchor is self-launching.
6148758 - Boat anchor - Owned by Electromechanical Research Laboratories, Inc. (New Albany, IN)
An anchor for a marine vessel has a shank pivotally connected to a fluke allowing pivotal movement therebetween about a pivot axis within a range of motion. The anchor also has a pivot control member engageable between the shank and the fluke to regulate the pivotal movement throughout at least a portion of the range of motion. The pivot control member is elastically deformed as the shank is pivoted relative to the fluke. The anchor has an operational position in which the point of connection of an anchor line to the shank is positioned below a horizontal plane containing the pivot axis.
A marine anchor having integral flukes which have together a delta configuration. The flukes have a trailing arcuate edge. Each fluke has a wedge cut into the trailing portion to provide extending outer fins. The fins are turned downwardly to provide flaps that produce a self righting anchor and one that results in a horizontal planing when the anchor is pulled.
An asymmetric boat anchor has an unballasted fluke (2), with a tip (6) and a back (8) with a curved edge (10); a shank (4) is mounted on the fluke. The edge (26) of the shank away from the tip (6) of the fluke is curved and the free end of the shank (18) is offset from a plane (30) tangent to the back edge (10) of the fluke and to the edge (26) of the shank. Thus, if the anchor is in a reverse position, contacting the sea ground through the edge of the shank and the back edge of the fluke, it will roll on the edge of the shank and turns to the anchoring position.
A marine anchor having a shank connectible to an anchor rode at one end and having a double ploughshare fluke rigidly mounted at the other end thereof is described. The fluke consists of two symmetrically mounted part-cylindrical blades disposed on each side of a central ridge in the medial plane of the shank and extending from a forward apex to divergent trailing ends. A ballast weight is mounted under the convex surfaces of the blades and contained within the tangential plane to the convex surfaces. Each blade is also provided with a fin along the outer edge thereof, perpendicular to the central edge and located aft of the junction of the shank and the fluke.
