Patent Publication Number: US-2013247810-A1

Title: Methods for the synthesis of alkyne-containing dicarba bridges in peptides

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to devices, methods and systems for retrieving and releasing marine anchors, and, more particularly, devices, methods and systems that may be installed on existing marine anchors to facilitate retrieval of an anchor lodged in an underwater obstruction and cannot be retrieved via conventional methods. 
     2. Brief Description of the Related Art 
     Marine anchors are widely used to secure marine vessels at a location on a body of water. Generally anchors are constructed from metal and are of suitable weight, size and shape to facilitate retention of the anchor on the bottom of a water body. Marine vessels and other watercrafts often carry one or more anchors which are used to secure the vessel in a location so that the vessel may hold its position as currents, tides and wind may act to move or pull the vessel in one direction or another. Anchors can have different configurations and different weights and are selected for use based on the size of the vessel or watercraft as well as the nature of the bottom to which the anchor will be set. One typical configuration of an anchor includes a shank with a crown on one end. A fluke and a point or other configuration typically is provided at the crown end for securing the anchor to an underwater bottom surface. The anchor, opposite the crown end, in a typical configuration, has an eye or ring to which a cable, line or chain, generally referred to as the anchor rode, may be attached for lifting the anchor. Some anchors also have a stock which may add further weight to the anchor or may be used to secure the anchor when it is stowed aboard a vessel. 
     The topography of underwater bottoms, such as that of lakes, rivers, seas and oceans, may vary. Bottom types that may be encountered include sandy bottoms, muddy bottoms, rocky bottoms, combinations of these, as well as natural and man-made structures that may be present on the water bottom. Generally, most typical anchors have one or more flanges, such as metal flukes which are designed to bury themselves in sandy or muddy (e.g., soft) bottoms. When rocky bottoms are encountered, the anchor fluke will often hook itself to the rock. 
     The anchor and anchor rode need to remain secure and withstand forces when the boat is exposed to wind, current, wakes from passing vessels, and other forces that may act on an anchored vessel. The anchor rode attached to the anchor, in some cases, may slacken when a boat is moved in a direction toward the anchor, and conversely, forces also may operate to create tension on the anchor line when a wave pulls the vessel in a direction away from the anchor location. Because the anchor must remain secure at a location on the water bottom in order to withstand these types of forces, generally, it is desirable to set the anchor so that a portion of the anchor, such as, for example, an anchor fluke, buries itself in the bottom. However, rocks or other structure (such as sunken vessels, debris, concrete pieces) that serve as potential obstructions to the anchor may be unnoticed when the anchor is initially deployed. So in cases even where a watercraft operator uses care, and does not have a reason to believe that the water craft was being anchored to an underwater structure, it still is not uncommon for a marine anchor to become lodged in an underwater obstruction. In order to retrieve a marine anchor from an underwater bottom, generally the anchor rode or line is retracted and must overcome an initial force to dislodge the anchor from its set condition. When the anchor is set a corresponding compass heading that the boat is pointing towards when in an anchored position may be determined. For example, if an anchor set is South 180 degrees, when one is attempting to release the set anchor, one would generally follow that heading to back the lodged anchor out. Once the initial set force is overcome, the anchor is pulled up from the water bottom by hoisting the anchor line, and then withdrawn from the water and stowed aboard the vessel. The retrieval of a set anchor is routinely accomplished with the assistance of a device or mechanism, such as a windlass, a winding device which generally may be operated to retrieve the anchor line and anchor with its motorized or manual mechanism (though other manual methods also may be used, such as pulling the line itself, with the use of rollers, manual pulleys or reels). Similarly, mechanical or electromechanical devices, such as a windlass, also may be used to lower the anchor when anchoring the vessel. In other instances, depending on the size of the vessel and the size of the anchor, it is not uncommon to retrieve an anchor by manually lifting the anchor line and retrieving the anchor and manually stowing it aboard the vessel. 
     However, in many cases, the anchor may become lodged in an underwater obstruction, whether a natural obstruction (e.g., rocks or coral) or an obstruction such as debris, a wreck or other objects. Many anchors, in spite of the maneuvering efforts that may be made by vessel captains and operators, simply cannot be retrieved once lodged in an obstruction. Therefore, in many instances, there is no choice but to sever the anchor line or cable in order to release the vessel from the anchor. In these instances the anchor remains lodged in the underwater obstruction, which generally is at the bottom of the water environment. 
     When an anchor becomes stuck and cannot be retrieved, the cost and inconvenience to the vessel owner may be extensive. Often divers retrieve abandoned anchors from underwater locations and resell them. If a vessel operator is an avid boater or operates his craft frequently, there may be more stuck encounters and periodic anchor losses. Though care may be used when anchoring so that an obstruction is attempted to be avoided, many elements, such as strong winds, currents, tides, and sometimes even boat traffic, may make it difficult or impossible at all times to anchor in an obstruction free zone. In addition, where boaters operate their crafts in waters that have rocky bottoms, it may be difficult to avoid potential obstructions. 
     One example of a device that has attempted to address the problem of anchor retrieval, involves providing a specially configured anchor. However, this is generally expensive and requires a particular replacement of an existing anchor. Another example of a device involves a shank constructed from sections that may hinge apart from one another. 
     A need exists for a device, system and method which may be used in conjunction with a variety of existing marine anchors to facilitate the retrieval of an anchor that is lodged in some type of underwater structure. A further need is to provide an anchor retrieval device that is easy to install and operate and is economical. 
     SUMMARY OF THE INVENTION 
     A retrieval device, system and method are provided for retrieving marine anchors that have become lodged in an underwater obstruction. The retrieval device, system and method are designed to be used in conjunction with a variety of existing anchors styles. 
     It is not uncommon for a marine anchor to become lodged when pulled or lowered into an underwater obstruction through the normal course of anchoring a boat. Even if the proper anchoring procedures are followed, in many cases, a marine anchor may become lodged in an obstruction. The present invention is designed to facilitate the release and retrieval of a variety of commonly used marine anchors from underwater structures to which the anchor has become lodged. 
     According to preferred embodiments, the retrieval device may be installed on an existing anchor utilizing the existing anchor line (or anchor rode as it is generally referred to). The retrieval device, system and method allow the anchor to be pulled in different directions by applying a pulling force to a different point of the anchor through the operation of the device. For example, the device may facilitate pulling the anchor in a direction that is opposite of the direction in which the anchor was set. 
     According to preferred embodiments, actuation of the device redirects the point of connection at which the pulling retrieval force is applied to raise the anchor. 
     When the anchor is not inhibited by an obstruction, the anchor may be lowered, set and retrieved in the customary manner, even when the retrieval device is installed. A first pulling force may be applied in the convention manner to retrieve an anchor by causing the anchor set to release from the water bottom to which it was previously set. Where the conventional force, however, is unsuccessful, and the conventional method is unsuccessful to release a set anchor, a release mechanism of the retrieval device may then be triggered by applying additional force to the anchor line. 
     According to preferred embodiments, the release mechanism may be actuated when a peak force threshold is met and, once actuated, the direction of pull on the anchor is changed by changing the retrieval terminal location on the anchor from one point to another. This facilitates retrieval of the obstructed anchor by providing the ability to back out and retrieve the anchor, for example, by pulling the anchor from a direction opposite that of the direction of the initial pulling force (that was unsuccessful to retrieve the anchor). 
     Another feature of the retrieval device, system and method is a reset feature which may be used to facilitate raising a released anchor back into or over the bow or pulpit of a vessel. The reset feature enables an anchor that is retrieved from a point other than the shank eye to be righted so that the anchor shank may be the leading end of the anchor when the anchor (e.g., such as a dislodged anchor) is raised aboard the boat. 
     According to preferred embodiments, the release mechanism of the retrieval device may be configured to have a pre-determined peak force threshold for actuation. Retrieval devices may be constructed with various force thresholds, so that a retrieval device used for a larger vessel has a larger force threshold for release than a retrieval device used for a small vessel. The predetermined peak force threshold may vary and, for example, may take into account the weight of the vessel, the anchor weight, conditions of use, the type of vessel that the device is to be used in conjunction with, or any combination of these. 
     The retrieval device, system and method are designed to be utilized with most existing anchors. Most anchors include a shank eye and a crown eye, and, in most instances, the anchor rode includes a length of chain that connects the anchor with another portion of the anchor rode, such as, for example, a cable or rope. The retrieval device may be used with many commonly used anchors without the need to make modifications. Examples of anchors with which the device, system and method may be used include fluke type, claw or hook type, plough type, and the like, as well as Delta, Danforth, and Rockna anchors. 
     The retrieval system, method and device may be used for watercraft and most power and sailboats that have sufficient power to overcome the force threshold of the release mechanism. According to preferred embodiments, where a release mechanism includes a release pin, the sufficient power required for actuation is that to break the designated release pin. 
     The device may be configured to permit permanent mooring. In the event permanent mooring, is desired, such as, for example, in extreme storm and wind conditions, according to preferred embodiments, the retrieval device is adaptable and may be readily removed or bypassed, or the shearable component replaced with stronger component, for example, in such conditions, an appropriately heavy steel bolt may be substituted for the release pin. 
     The retrieval device may also be utilized to facilitate stowage of an anchor aboard a vessel by encouraging the anchor to seat itself in a proper position on the bow or pulpit. According to preferred embodiments, the device may be installed to connect the anchor chain to the anchor in a configuration that, when retrieved onto the vessel, provides the anchor with the ability to pivot relative to the chain so the anchor may seat into a desired stowage position. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWING FIGURES 
         FIG. 1  is a side perspective view showing an exemplary embodiment of a retrieval device installed on an anchor in accordance with the method and system of the invention. 
         FIG. 2  is an enlarged side perspective view illustrating the retrieval device shown in  FIG. 1  with the anchor chain and a portion of the anchor shank. 
         FIG. 3  is a top plan view of an exemplary embodiment of a retrieval device according to the invention shown in an assembled condition but without the anchor and anchor rode. 
         FIG. 4  is a perspective view of a release bar member of the retrieval device of  FIG. 3 , shown separately from the other components. 
         FIG. 5  is a top plan view of a release pin of the retrieval device of  FIGS. 1-3 , shown separately from the other components. 
         FIG. 6  is a side elevation view illustrating the retrieval device and the reset line in an environment with an anchor rode. 
         FIG. 7  is a side elevation view illustrating the retrieval device and the reset line in a recovery position. 
         FIG. 8  is a side elevation view of the shank portion of an anchor shown with the retrieval device installed. 
         FIG. 9  is a side elevation view of an anchor shown with the anchor chain connected to the crown end in a preferred retrieval position. 
         FIG. 10  is a side perspective view showing an exemplary embodiment of a retrieval device installed on an anchor in accordance with the method and system of the invention, where the anchor is shown in a partial view. 
         FIG. 11  is an enlarged side perspective view of the exemplary embodiment shown in  FIG. 10 , with the anchor being shown in a partial view to illustrate a connection at the anchor crown end. 
         FIG. 12  is a perspective view of an alternately configured release bar member shown separate from the other components. 
         FIG. 13  is a perspective view of the exemplary embodiment of  FIG. 10 , illustrated with an anchor shown in partial view, with the anchor chain in an alternate retrieval position. 
         FIG. 14  is a side perspective view showing another exemplary embodiment of a retrieval device installed on an anchor in accordance with the method and system of the invention. 
         FIG. 15  is a perspective view of the embodiment shown in  FIG. 14 , as viewed from above, showing the device moved to a position for activating the release mechanism. 
         FIG. 16  is a separate perspective view of the release bar member shown with set screws. 
         FIG. 17  is an enlarged sectional view of the release bar member of the device shown in  FIG. 14 , shown separate from the anchor and other components, and being illustrated with a portion of the cable and the set screws engaging the cable. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Referring to  FIG. 1 , there is illustrated a retrieval device  10  for facilitating retrieval of a marine anchor  100  from the bottom of a body of water. Though the anchor  100  is illustrated as a claw or Bruce type anchor, the retrieval device  10  may be used in conjunction with a wide variety of other types of anchors (including fluke types, claw or hook types, plough types, and the like). The retrieval device  10  is used to effect a change in the pulling direction of the anchor  100  by changing the location that the anchor rode  200  makes with the anchor  100 . The retrieval device  10 , as illustrated in the exemplary embodiment in  FIG. 1 , is configured so that it may connect to the marine anchor  100  and also connect to the anchor rode  200 , where the anchor rode  200  is shown comprising an anchor chain  101  and rope section  201 . Generally, typical anchor rodes may comprise an all-rope rode (for smaller vessels), an all-chain rode (for larger vessels), or a combination rope and chain rode. The combination type rodes generally include a chain section having one end that attaches to the anchor and another end that attaches to a rope section (or other cable) that leads to the boat. The end of the rope  201  opposite the chain secured end  201   a  generally is secured aboard a structure of the vessel, such as for example, a windlass or cleat. 
     As illustrated in  FIG. 1 , the retrieval device  10  is shown in a preferred installation making a connection with a mid-link  101   a  of the anchor chain  101 . According to a preferred embodiment, the retrieval device  10  connects with the anchor chain  101  at a location near the leading end  102   a  of the anchor shank  102 . The retrieval device  10  also connects with the anchor  100  at the leading shank end  102   a , and is illustrated in the exemplary embodiment connecting with the shank eye hole  106  of the anchor  100 . 
     According to a preferred embodiment, the device  10  connects with the anchor  100  and anchor chain  101 , and the anchor chain  101  also makes another connection at another location on the anchor  100 . The anchor chain  101  is shown connected to the crown eye hole  103  located at the crown end  107  of the anchor  100 . Preferably, the anchor chain  101  may be fastened to the crown eye hole  103  at the terminal chain end  101   b , though, according to alternate embodiments, it may be fastened to other locations on the anchor  100  that will facilitate a pulling force load from a direction other than the shank eye connection. A connector, such as for example a shackle  222 , may be used to make the connection between the chain end  101   b  and the crown eye hole  103 . The connection points on the anchor  101  are shown as the shank eye hole  106  and crown eye hole  103 , however, according to alternate embodiments, a suitable connecting point may be made by drilling a hole in the anchor (for example, where the anchor has no crown eye. The anchor chain  101  preferably is secured to the crown eye hole  103  of the anchor crown end  107  with a suitable fastening member, such as, for example, the bolt  104  and nut  105 . Though the bolt  104  and nut  105  are shown fastening the terminal end  101   b  of the chain  101 , other suitable fastening members may be used to secure the anchor chain  101  to the crown eye hole  103 . The bolt  104  extends through the crown eye hole  103  and a link  101   b  of the anchor chain  101  (which preferably is a terminal link, as in this example) and is secured with the nut  105 . A shackle  222  is shown linking with the end of the anchor chain  101   b . The nut  105  and bolt  104  may be matingly threaded, and the nut  105  may be a lock nut. In the embodiment illustrated in  FIGS. 1 and 2 , preferably, the anchor chain  101  extends beyond its connection with the retrieval device  10  made at the shank end. 
     The retrieval device  10  permits the anchor  100  to be deployed (i.e., dropping anchor) and raised (i.e. weighing anchor) according to customary anchoring procedures, when the anchor  100  is not obstructed. For example, an anchor  100  to which the retrieval device  10  is installed may be dropped and set on the bottom of the water body. When set, the anchor  100  restricts or prevents movement of the vessel to which the other end of the anchor line  201  is secured. Once the anchor  100  is set, the vessel operator may permit it to remain set until it is time to weigh anchor (i.e., raise the anchor). Some anchors rely on weight and may not bury themselves (or a portion thereof) in order to be set, but, rather, are set by dropping onto the bottom of a water body. However, depending on their construction, these anchors too may be susceptible to being lodged in an obstruction. Notwithstanding the operator action, at times, a set anchor may detach from the bottom causing a marine craft to drag anchor. In some cases, the anchor may reset itself, possibly with the marine craft in a different location, or, in other cases, the anchor may need to be reset by an operator of the craft. 
     The retrieval device  10  is configured so that, if the anchor is not obstructed, the device  10  may remain installed on the anchor  100  and anchor chain  101  when the anchor  100  is hoisted from the bottom of the water body, and when the anchor  100  is raised and stowed aboard the vessel (such as for example on an anchor roller or hawse pipe). 
     There are some instances where the anchor  100  engages an obstruction (such as a structure on the water bottom, e.g., rocks, wreckage, or other debris or material), and the anchor  100  secures itself to the obstruction. In these situations, many times, attempts to raise the anchor  100  through conventional methods fail. The force load applied to raise an obstructed anchor  100  generally draws the vessel toward the location of the anchor  100  as the anchor rode  200  is taken up. The vessel operator may realize that the vessel anchor is lodged in an obstruction. Also, mechanical devices or electromechanical devices, such as, for example, a windlass, may cease applying additional pulling force on the anchor line once a maximum pull has been reached (such as when a retrieval force applied to the anchor line fails to dislodge a set anchor). 
     The retrieval device  10  is configured to disengage a connection between the anchor chain  101  and the anchor  100  that the retrieval device  10 , prior to its actuation, had secured. According to preferred embodiments, the retrieval device  10  may be configured so that one or more of its components may be retrieved along with the anchor  100  or anchor chain  101 . According to a preferred embodiment, the retrieval device  10 , upon disengagement of the anchor and chain connection (at the shank eye hole  106  and the mid-link  101   a ), remains attached to one or the other of the anchor  100  or anchor chain  101 . According to some preferred embodiments, the retrieval device  10  may be configured so that, after the retrieval device  10  is actuated and the connection disengaged, at least one or more components of the retrieval device  10  remain on one or the other or both of the anchor  100  and anchor chain  101 . 
     According to some preferred embodiments, one or more components of the device  10  may be provided with predefined shear points that are actuated by application of a predetermined force threshold, which generally matches the power and size of the vessel. The retrieval device  10  is actuated by applying a force load on the anchor  200  that is greater than the peak force threshold of the release mechanism of the retrieval device  10 . The retrieval device  10  preferably is configured with a predetermined peak force threshold, which, when a force load equal to (or exceeding) the peak load is applied to the retrieval device  10  by the anchor line  200 , causes the disengagement or planned failure of at least one of the retrieval device connections. 
     An exemplary embodiment of the retrieval device  10  is illustrated in  FIGS. 1-5 . The retrieval device  10  is constructed with a release mechanism that provides a releasable connection (such as a breakaway or disengagement) between the anchor line  200  (the anchor chain  101  illustrated in the figures) and a connection point on the anchor  100 . The retrieval device  10  preferably is installed to provide one connection between the anchor  100  and the anchor chain  101 , while the anchor chain  101  is fastened to the anchor  100  at a different location to make a second connection. 
     Referring to  FIG. 3 , an exemplary embodiment of the retrieval device  10  is illustrated in a preferred configuration, with the components shown in an assembled condition, but without the anchor  100  and anchor rode  200 . The retrieval device  10  is useful for facilitating retrieval of a marine anchor from a water bottom. According to a preferred embodiment, the retrieval device  10  is constructed having a release bar member  11 . The release bar member  11  is configured to make a first connection utilizing the shackle  22  which in turn is connected to the anchor shank eye  106  of the anchor  100  (as illustrated in  FIGS. 1 and 2 ). The release bar member  11  is shown in an exemplary configuration having a body portion  12 , a first leg  13  and a second leg  14 . The first leg  13  and second leg  14  are spaced apart from each other to define a slot  15  therebetween. As illustrated in  FIG. 4 , the first leg  13  has a first leg bore  16  and the second leg  14  has a second leg bore  17 . The first leg bore  16  and second leg bore  17  are shown disposed in an opposing relationship to accommodate a fastener. The retrieval device  10  has a connection capability to connect with the anchor  100  and anchor chain  101 . A connector, shown comprising a fastener or bolt  20  facilitates the connection of the release bar member  11  with the anchor chain  101 . A nut  21  is provided to secure the bolt  20  on the first leg  13  and second leg  14  ( FIGS. 2 and 3 ). Preferably, the release bar member  11  is constructed of a material which is suitably strong so that the connection made between the release bar member  11  and the anchor chain  101  is stronger than the release pin  31  connection made to connect the shackle  22  with the release bar member  11 . The first leg bore  16  and second leg bore  17  of the release bar member  11  preferably are provided a suitable distance from the end of the release bar member legs  13 ,  14  respectively, so that the bores  16 ,  17  maintain the connection with the chain  101  and the bolt  20 . The retrieval device  10  further includes a connector, such as, for example, the shackle  22 , for attaching the retrieval device  10  to the anchor  100 . The shackle  22  is shown making a connection with the anchor shank eye  106 , while other components of the device  10  connect with a mid-link  101   a  on the anchor chain  101  ( FIGS. 1 and 2 ). The shackle  22  has a first arm  23  and a second arm  24 . The shackle first arm  23  has a first shackle aperture  25  therethrough, and the shackle second arm  24  has a second shackle aperture  26  therethrough. The shackle  22  is configured to releasably connect the device  10  to the anchor  100  by making a releasable connection between the device  10  and the anchor  100 . According to the embodiment illustrated in  FIGS. 1-5 , the shackle  22  is releasably connected to the release bar member  11 . Preferably, the connector, such as an existing shackle of an anchor  100  that may be used for securing the end of the anchor chain  101  to the shank eye  106  of the existing anchor is relocated to the crown end  107  and is secured to the crown eye hole  103 . The connector or shackle  222  is secured with the chain  101  to the crown eye hole  103  in a position where the shackle  222  faces the shank eye  106 , and retained on the crown end  107  with a bolt  104 , preferably constructed from stainless steel, and one or more spacers and a lock nut  105 , also preferably constructed from stainless steel. According to a preferred installation, the connector, such as the shackle  222 , at the crown end  107 , is secured into a position so that it remains in that position. 
     As illustrated in  FIG. 3 , according to a preferred embodiment, the release bar member  11  may be provided with a through bore  30  disposed in the body portion  12 . The shackle first arm  23  and shackle second arm  24  are shown spaced apart from each other and secured on opposite sides of the release bar member body portion  12 . The first shackle aperture  25  and second shackle aperture  26  are aligned with the through bore  30  of the release bar member  11 . 
     A release pin  31  is provided to connect the shackle  22  with the release bar member  11 . The release pin  31  is configured for installation through the first shackle aperture  25 , the release bar through bore  30  and the second shackle aperture  26 . Referring to  FIG. 5 , the release pin  31  is shown in a preferred configuration having a shaft portion  32  which includes a break away construction that permits predicted failure of the release pin  31  when subjected to a force load of a predetermined peak force threshold. Preferably, the release pin  31  is constructed from materials that have suitable strength and corrosion resistance, and that are able to withstand a force load applied to retrieve an anchor and to withstand forces exerted on a set anchor when an anchor is not lodged in an underwater obstruction. According to preferred embodiments, the release pin  31  may be constructed from brass or other metal. The predetermined peak force threshold of the release pin  31  is based on the force load that a vessel that is secured by the anchor  100  may apply by pulling. According to preferred embodiments, the peak force threshold of the release mechanism is not met when an anchor  100  is not obstructed, as the force applied to release the set of an unobstructed anchor (e.g., release the anchor from the bottom) is considerably less than the force threshold required to actuate the retrieval device  10 . The release pin  31  has a head  33  and threads  34 . The threads  34  are provided to connect with matingly corresponding threads of a fastening element, such as, for example, the lock nut  35 . The lock nut  35  secures the release pin  31  to connect the shackle  22  to the release bar member  11 , and thereby connect the shackle  22  to the anchor  100 . 
     According to preferred embodiments, the release pin  31  is configured with a failure mechanism provided on the pin shaft  32 , and is illustrated as the failure points shown as the annular grooves  37 ,  38  ( FIG. 5 ). The annular grooves  37 ,  38  may serve as shear points when a predetermined peak load is applied to the device  10 . The release pin  31  shear points preferably are configured to match the power and size of the vessel. According to a preferred configuration, the annular grooves  37 ,  38  are provided at locations along the pin shaft  32 , so that when the pin  31  is installed on the device  10 , each of the grooves  37 ,  38  aligns proximate to one of the shackle arms  23 ,  24 . The release pin  31  construction, such as, for example, materials used, its diameter, the size and depth of the grooves  37 ,  38 , or combinations of these properties, may be used to control the shearing force peak threshold load. 
     The release pin  31  and release bar member  11  preferably are constructed so that the release peak force load or threshold required to actuate release is matched to the power of the boat, as well as the anchor being used. The peak force load that is required to actuate the device  10  may be regulated by the construction of the materials used, as well as dimensions of the release pin  31  or other components. As illustrated in  FIG. 3 , the release pin  31  may be installed from either side to install the shackle  22  on the release bar  12 .  FIGS. 1 and 2  show the release pin  31  installed from one direction whereas the release pin  31  in  FIG. 3  is shown installed from the opposite direction. According to a preferred embodiment, the release bar  12 , release pin  31  and shackle  22  are dimensioned so that the release pin  31  may be installed from either direction, and the grooves  37 ,  38  substantially align near the shackle ends  23 ,  24 . 
     According to one embodiment, which, for example, may be used for boats up to about thirty-eight feet in length, a short link ¼ inch anchor chain is used, and a release pin  31  may be provided having a diameter of about 0.20 inches. In this example, the corresponding leg apertures of the release bar member  11  preferably have a diameter, for example, of about 0.213 inches, which is slightly larger than the diameter of the connector, the bolt  20 . The diameter of the through bore  30  in the release bar member may be larger than the largest size pin diameter, where the device  10  is configured to use release pins of different sizes that may be installed for use on the same release bar member  11  in order to provide different release peak force thresholds, so that one may be chosen that matches the boat and its power characteristics. In this example, the release bar member  11  may be constructed from a material that preferably is strong and will not corrode, such as stainless steel. The release bar member  11  may be about 2.4 inches in length, according to one embodiment, with legs of about one inch, and a slot formed between the legs having a width to accommodate a diameter of the link of the chain that is to be secured. For example, according to an example where the device  10  is used with a ¼ inch anchor chain, the slot may be about 0.325 inches. According to another example, a larger size chain of about 5/16 inch or 7/16 inch, the slot width preferably is wide enough to accommodate the chain diameter, and the release pin hole diameter may be larger to accommodate a larger diameter release pin. 
     The retrieval device  10  preferably is connected to the anchor  100  by making a connection with the anchor shank eye  106 . Referring to  FIG. 2 , the shackle  22  passes through the anchor shank eye  106  and is secured to the release bar member  11  with the release pin  31  and nut  35 . The anchor shank eye  106  is shown at the leading end  102   a  of the anchor shank  102 . The retrieval device  10  connects with the anchor  100 , as the shackle  22  passes through the anchor shank eye  106  to facilitate installation of the device  10  on the anchor  100 . The shackle connection with the anchor  100  preferably is releasable to detach the connection of the anchor  100  with one or more portions or components of the device  10  (upon application of a predetermined force load), and thereby release the connection that the device  10  makes with the anchor  100  and anchor chain  101 . The release of this connection, however, preferably is accomplished with the device  10  (or some of the device components) remaining on one or the other of the anchor line  101  or anchor  100 . When an anchor is obstructed, the force that may usually be applied to release the set of the anchor under anchoring conditions where the anchor is not obstructed is exceeded. Additional force, therefore, is applied in order to attempt to dislodge the anchor  100  from the obstruction. The force applied to the obstructed anchor increases, until it exceeds the peak force threshold of the retrieval device  10 . According to a preferred embodiment, the retrieval device  10  release mechanism is actuated when the force threshold of the release pin  31  installed in the release bar member  11  has been exceeded. This force load causes one or more of the release pin  31  failure points to break, and the connection between the shackle  22  and the release bar member  11  disconnects. A force load applied to the release bar member  11  through the pull of a vessel exceeds the peak force load threshold that the pin  31  is able to withstand (for example, when an anchor  100  is obstructed), actuates the release feature of the device  10 , causing the shackle  22  to disengage from the release bar member  11 . According to preferred embodiments, the force required to break the release or shear pin  31  may necessitate the operator tying the rode  200  off to the port or starboard bow cleat while the boat is positioned directly over the anchor  100 . Forward movement of the boat in the direction of the anchor set then creates sufficient pressure to break the shear pin  31 . 
     According to preferred embodiments, the components of the device  10  (with the possible exception of the pin  31 ) may be retained on the anchor  100  or the anchor chain  101  even after actuation occurs and device  10  components, such as the release bar member  11  and shackle  22 , have released their connection. A retaining mechanism may be provided to facilitate retention of one or more of the components when the release mechanism of the retrieval device  10  is actuated. According to the exemplary embodiment, as shown in  FIGS. 1-3 , a retaining mechanism may include a retainer  50  installed on the shackle  22 . The retainer  50  may comprise a stainless steel wire tie, a stainless steel wire, an elastic member such as an o-ring, or other suitable member, and may be made from suitable materials, including, for example, synthetic rubber, stainless steel, plastic or the like. The retainer  50  is shown installed on the first arm  23  and second arm  24  of the shackle  22 . The configuration of the shackle  22  and the placement of the retainer  50  facilitates maintenance of the shackle  22  on the anchor shank eye  106 , even after the release pin  31  has released the shackle connection with the release bar member  11  (e.g., such as under conditions of a peak force load exceeding the predetermined force threshold of the release mechanism). For example, where the retainer  50  comprises an o-ring, the retainer  50  preferably is installed prior to connecting the shackle  22  to the release bar member  11  (or before another connection is made that may prevent the retainer  50  from being installed). 
     Referring to  FIG. 1 , according to a preferred installation configuration, the anchor chain  101  is shown having connections with the anchor  100  at the crown end  107  and at the shank end  102   a  to handle the force load of a retrieval force applied to the anchor  100 . The retrieval device  10  and the installation configuration illustrated enables a force load applied to retrieve the anchor  100  from a water bottom, for example, by the hoisting of the anchor line  200  (and anchor chain  101  connected thereto). Under conditions where the anchor  100  is not obstructed, the anchor set may be released and the anchor chain connections with the anchor and device  10 , preferably, remain connected. This enables retrieval of the anchor  100  with the shank end  102   a  as the leading end. However, when the force applied to retrieve an anchor  100  is insufficient due to the anchor  100  being obstructed, the release mechanism of the device  10  will actuate when additional force (the peak load) is applied and reaches the predetermined release force threshold of the device  10 . According to the embodiment illustrated, the release of the connection of the anchor chain  101  at the anchor shank eye  106  occurs upon the shearing of the release pin  31 . 
     The use of the anchor release and retrieval system and method may be carried out by repositioning an existing anchor chain, such as the chain  101 , to connect at the crown  107  of an existing anchor  100 . The repositioning provides a different point of retrieval on the anchor. Another location along the chain  101  is connected by the device to the anchor shank  102 , preferably at the shank eye  106 . According to a preferred embodiment, one end of the release bar member  11  connects to the anchor shank eye  106  via the shackle  22  and the release pin  31 . The other end of the release bar member  11  is attached to a mid-link  101   b  on the anchor chain  101  with a fastener, such as, for example, the stainless steel bolt  20  and lock nut  21 . 
     Referring to  FIG. 6 , preferably, a reset line  70  may be connected to the anchor chain  101  and the anchor shank eye  106 . An optional feature of the present device, system and method includes a reset line  70 . The reset line  70  may be used to facilitate retrieval of the anchor onto the vessel. The optional reset line  70  may be used in connection with the anchor retrieval devices  10  and  110  shown and described herein. After release, the anchor  100  is presented to the bow pulpit in an upside down position. Upon retrieval, and, once the end of the reset line  70  (attached to a mid link) may be reached, as the chain  101  is retrieved, the reset line  70  is pulled and the reset line  70  flips the anchor  100  to the proper shank up position, from which the anchor  100  may easily be lifted through the bow pulpit and secured (instead of lifting the heavy anchor over the bow). According to a preferred embodiment, the reset line  70  has a suitable length to facilitate righting the anchor  100 . According to a preferred embodiment, the reset line  70  may have a length approximately four times the length of the anchor shank  102 , though other suitable lengths may be used. Preferably, the reset line  70  is connected between the anchor shank eye  106  and the anchor chain  101 , and is bundled and stored on the anchor rode  200 . The reset line  70  may be installed by tying one end of the reset line  70  to the anchor shank eye  106  and tying another end of the reset line  70  to the anchor chain  101  preferably at a location on the anchor chain  101  upstream of the anchor shank end  102   a.    
     The reset line  70  preferably is connected to the anchor shank eye  106  (the point of connection that is released by the device  10  according to the embodiment illustrated when the components of the device  10  are actuated). Since, when the anchor  100  is retrieved from the anchor crown end  107 , from the anchor chain connection at the anchor crown eye  103 , generally, as illustrated in  FIG. 7 , the anchor shank end  102   a  will follow the crown end  107  (i.e., retrieve the anchor upside down). This means that an operator must manually lift the anchor  100  in order to right the anchor position to bring the anchor aboard. In some cases, the anchor may be of substantial weight and may be located below the boat edge. The reset line  70  may be retrieved along with the anchor chain  101  and, upon retrieval, may be expanded from its bundled or stored position on the anchor chain  101  as the anchor chain  101  approaches or is brought aboard the vessel. Unraveling the bundled portion of the reset line  70  releases the slack of the reset line  70  (though the line retains its connection with the shank eye hole  106  and, preferably, also with the anchor chain  101 ). The reset line  70  may then be hoisted to right the anchor  100  and hoist the anchor  100  to a stowed position. This may be done by manually hoisting the reset line  70  or by attaching the reset line  70  to a mechanical or electromechanical device, such as, for example, a windlass, or other suitable device. Once the anchor  100  is stowed, the reset line  70  may be reset to be replaced to its set condition (with the excess slack tied to the anchor chain  101 ).  FIG. 6  shows an example of a reset line  70  installed in a stored condition. Securing elements, such as, for example, the plastic electrical ties  75 , may be used to fasten the line  70  to the anchor chain  101 . 
     When the retrieval device  10  is installed with an anchor  100  and anchor rode  200 , the force used to retrieve an unobstructed anchor preferably remains on the terminal end  101   b  of the anchor chain  101  (which, in the example illustrated in  FIGS. 1 and 2 , is attached to the crown end  107 ). According to this preferred installation configuration with selection of a suitable mid-link on the chain, limited pressure is placed on the anchor release and retrieval device  10  (attached to the shank eye  106 ). When an anchor is not lodged in an underwater obstruction, the system, method and device  10  facilitate retrieval of an anchor utilizing conventional anchoring procedures. Should the marine anchor  100  become lodged in an underwater obstruction, a retrieval process is initiated that allows direct force to be applied to the release mechanism of the device  10 , such as the release pin  31 , causing the release pin  31  to shear thus enabling the anchor  100  to be pulled in a different direction, which may be backwards, in a direction opposite the direction the anchor  100  was set. The anchor  100  is then maneuvered out of the obstruction, for example, by backing the anchor  100  out of the obstruction, and the anchor  100  may then be retrieved by taking in the rode and the up righted with the use of the reset line  70 . Once the anchor  100  is on board the vessel, according to the preferred embodiment, the release pin  31  may be replaced and reset line  70  is reset, and the anchor  100  is ready again for use. 
     Should a marine anchor become lodged in an underwater obstruction, a preferred method for facilitating the steps of the retrieval process may be as follows. According to a preferred retrieval method utilizing the device  10  and system, in order to retrieve an anchor  100  that has become lodged (e.g., in an obstruction), preferably, the boat is moved forward to a position as directly as possible over the anchor  100 , as the slack in the anchor rode  200  is taken in. Once the boat is positioned directly over the anchor  100 , the anchor rode  200  is tied off to a bow cleat of the boat. The boat is then moved slowly forward and slightly to the right or left of the path established while at anchor. This motion puts pressure on the anchor rode  200  and, in turn, the anchor release and retrieval device  10 . The vertical pull shifts the retrieval pressure from the anchor shank  102  to the device  10  (see  FIG. 8 ) which, when sufficient engine power is applied in the direction of the anchor set, will cause the shear pin  31  to break and release, thus enabling the anchor  100  to be backed out of the obstruction as the boat is moved slowly forward to port or starboard of the anchor set. The anchor  100  may then be retrieved. Preferably, the anchor  100  is then retrieved from the connection made at the crown end  107  (see  FIG. 9 ). When the released anchor  100  is retrieved it will be positioned upside down (see  FIG. 7 ) and will need to be righted so the shank  102  may be guided properly over or through the bow pulpit of a boat. Once the rode has been retrieved to the point where the reset line  70  is accessible, by pulling on the reset line  70  at this point in the retrieval procedure, the anchor  100  will be properly positioned and will be guided properly through or over the boat pulpit. The retrieval device  10  preferably may be configured so that it may be reset once it has actuated and been retrieved. 
     In  FIGS. 10-13 , an alternate embodiment of a retrieval device  110  is illustrated having a connection capability to connect with the anchor  100  and anchor chain  101 . Although the retrieval device  110  is illustrated in a preferred installation arrangement with a cable  140 , the retrieval device  110  alternately may be installed in an arrangement as illustrated in  FIG. 1 , where the device  110  installs to a mid link  101   a  of an anchor chain  101 , and the anchor chain  101  is secured at the crown end  107  of the anchor  100 . The alternate embodiment of the device  110  is illustrated with an alternate connection arrangement between the anchor  100  and the anchor rode  200 . The anchor rode  200  includes an extended portion that is configured as a cable  140 , with one end of the cable  140  being secured to the anchor chain  101  with a connector  117 , and another end of the cable  140  being secured to the crown end  107  of the anchor  100 . 
     According to a preferred embodiment, the connector  117  may be configured as a shackle. As illustrated in  FIGS. 10 and 13 , the connector  117  is configured as an anchor shackle  122  with a screw pin  118 . The leading or upper shackle  122  is illustrated having two arms  122   a ,  122   b , and, a suitable fastener, such as, for example, the screw pin  118 , is provided to secure the shackle  122  to a link of the chain  101 . According to a preferred embodiment, the upper or leading shackle  122  is illustrated in  FIGS. 10 and 13  with a threaded aperture  122   c  in the first arm  122   a , a threaded aperture  122   d  in the second arm  122   b  and a screw pin  118  securing the shackle  122  to the anchor chain  101 . Alternately, other suitable connectors may be provided, such as for example a shackle with a through bolt. Alternately, for example, the connector  117  may be configured similar to those shackles  22  and  222  shown and described herein where a bolt may pass through apertures in the shackle arms and be secured with a nut. 
     According to the embodiment illustrated in  FIGS. 10-11 , the retrieval device  110  is shown installed in a preferred configuration where the device  110  maintains a connection with an end link  101   b  of the anchor chain  101  via the connector  117 . The cable  140  preferably has a first loop  141  at one end thereof and a second loop  143  at a second end thereof. The first loop  141  facilitates the connection of the cable  140  with the components of the retrieval device  110 , and the second loop  143  makes a connection with the anchor crown end  107  ( FIG. 11 ). 
     Preferably, the cable  140  is provided having a suitable length so that the leading shackle  122  engages the cable  140  when retrieving an anchor that is not obstructed. According to a preferred embodiment, the cable  140  is properly dimensioned so that when the anchor  100  is obstructed, and a pulling force applied to retrieve the anchor  100  is redirected (such as, for example, from a substantially vertical position, as shown in  FIG. 13 ), the cable  140  is in a relaxed condition. A pulling force applied to the obstructed anchor from the alternate retrieval location (such as that shown in  FIG. 13 ) places the retrieval force load on the release pin  31  through the release bar member  111  and the leading shackle  122 . When the release pin  31  disengages (e.g., breaks), the leading shackle  122  engages the cable  140  and the pulling force load is placed on the cable  140  to retrieve the anchor  100  from the crown end  107  where the cable second loop  143  is connected. 
     According to a preferred embodiment, the cable  140  may be secured to the anchor crown end  107  with its second loop  143  using a shackle, such as, for example, any of those shackles  22 ,  122 ,  222  shown and described herein. According to a preferred embodiment, a shackle, such as the leading shackle  122  may be provided with an anchor screw or screw pin  118  that is threadingly engageable with one or more of the shackle arms to secure the shackle to the anchor crown end  107 . Alternately, the cable end  143  may make a direct connection with the anchor  100  at the crown end  107 . For example, though not shown, a bolt and washer assembly may be provided with the bolt passing through the crown eye hole  103  and being secured with a locknut and one or more washers, such as, for example, fender washers. Other suitable connecting elements may be used to attach the cable  140  to the crown end of the anchor  100 . 
     The retrieval device  110  is illustrated in a preferred embodiment having a shackle  22  that attaches the retrieval device  110  to the anchor  100 . In  FIGS. 10 and 13 , the shackle  22  is shown making a connection with the anchor shank eye  106 , while other components of the device  110 , such as, for example, the release bar member  111  and connector  117  connect with the anchor chain  101 , and, more preferably, to an end link  101   b  of the anchor chain  101 . The shackle  22  may be provided at the anchor shank end  102   a  and preferably may be secured to the release bar member  111  in the manner described herein in connection with the release bar member  11 . The release bar member  111  may be constructed from stainless steel, metal or other suitable durable material that can withstand the force loads from the other components, and preferably a material that is resistant to corrosion. According to preferred embodiments, the shackle  22  is arranged to make a releasable connection with the anchor shank  102 . 
     The release pin  31  secures the release bar member  111  to the shackle  22 . The release bar member  111 , as illustrated in the separate view of  FIG. 12 , has a through bore  130 , legs  133 ,  134  and a connecting portion  135 . The release bar member  111  also includes a slot  115 . According to a preferred embodiment, the release bar member  111  may be constructed having a surface portion  112  on each side thereof to facilitate the connection with the shackle arms  23 ,  24  and the release pin  31  (only one side being shown in  FIG. 12 , the other side preferably being similarly constructed). 
     Referring to  FIGS. 10 ,  11  and  13 , the retrieval device  110  is illustrated with the release bar member  111  being secured to the chain  101  and the anchor  100 . According to a preferred installation arrangement, the shank eye shackle  22  connects at one location of the release bar member  111  and the upper or leading shackle  122  connects with another location of the release bar member  111 . Preferably, the release pin  31  secures the shackle  22  at the anchor shank eye  106  to the release bar member  111 , and the upper shackle  122  passes through the release bar slot  115  and is secured to the anchor chain  100  (see  FIGS. 10 ,  11  and  13 ). 
     The cable  140  preferably is connected to the anchor chain  101 . According to a preferred embodiment, the cable  140  may be linked to the anchor chain  101  with the upper or leading shackle  122  connecting with the cable first loop  141 . The cable  140  preferably is installed to pass between the shank eye shackle  22  and release bar member  111 . According to a preferred installation configuration, the first loop  141  of the cable  140  passes between the release bar member  111  and shackle  22 . A clamp  142  is shown securing the cable  140  to form the first loop  141  and a clamp  142  also is shown to form the second loop  143 . Preferably, the cable  140  may be constructed from stainless steel or other suitable material that is resistant to corrosion in the environment in which the device  110  is to be used (e.g., fresh water, salt water). 
     According to the embodiment illustrated in  FIGS. 10-13 , the retrieval device  110  may be used in the manner described in connection with the retrieval device  10 . A preferred installation method includes the use of the cable  140  and involves placing the shank eye shackle  22  through the anchor shank eye  106 , and positioning the first loop  141  of the cable  140  along with the release bar member  111  at a location relative to the shank eye shackle  22  so that the release pin  31  may be installed through the shackle apertures  25 ,  26  and the release bar through bore  30  to connect the release bar member  111  with the shank eye shackle  22  and hold the cable  140 , preferably at the cable first end  141 . The cable  140  preferably, at the cable second loop  143 , is connected to the anchor crown end  107 , and may be secured to the crown end  107  using a suitable connector, such as, for example, the shackle  222  with a through bolt, or a shackle  122 ′ (see  FIG. 11 ) which like the leading or upper shackle  122  has a screw pin. 
     Referring to  FIG. 10 , the leading or upper shackle  122  is placed through the release bar member slot  115  and the cable  140  is secured at the first loop  141  with the release bar member  111  as the leading or upper shackle  122  is secured to the chain  101 . As illustrated in  FIGS. 10 and 11 , the leading or upper shackle  122  is secured to the chain  101  with a screw pin  118 . Preferably, the cable  140  is secured by passing the upper or leading shackle  122  through the first cable loop  141  when the shackle  122  is being installed on the anchor chain  101 . 
     According to the embodiment illustrated in  FIGS. 10-13 , the retrieval device  110  operates similar to the retrieval device  10  shown and described herein, with the release pin  31  breaking upon receiving a predetermined force load. If the predetermined force load required for breakage of the release pin  31  is not met, the retrieval of the anchor  100  is accomplished by raising the anchor rode  200 . For example, referring to  FIG. 10 , when a pulling force is applied to retrieve an anchor that is not obstructed, the anchor chain  101  pulls the upper shackle  122 , and preferably moves the upper shackle  122  along the release bar slot  115  (in a direction toward the anchor chain  101 ). According to a preferred installation configuration illustrated in  FIGS. 10 and 11 , a cable is used, and the retrieval device  110  is installed to connect the anchor  100  with the anchor rode  200  so that the cable  140 , and, preferably, the cable first loop  141 , forms the leading point of engagement with the upper shackle  122  when the shackle  122  receives a pulling force from the anchor chain  101 . This operation retrieves the unobstructed anchor  100  from a set condition. 
     When the anchor  100  is obstructed, and the retrieval cannot be accomplished with the pulling force exerted from the upper shackle  122  through the cable  140 , then the anchor  100  generally maintains its stuck position. In order to actuate the release mechanism of the device  110 , the anchor chain  101  is moved, preferably by moving the vessel to which the anchor rode  200  is attached so that the pulling force is applied from a different direction. Preferably, the vessel is moved to orient the anchor chain  101  in a position that slackens or relaxes the cable  140 , as shown in the exemplary illustration in  FIG. 13 , and permits a pulling force load from the anchor rode  200  to be applied on the release bar member  111 . According to a preferred embodiment, as illustrated in  FIG. 13 , when a pulling force is delivered through the anchor chain  101 , the point of retrieval shifts from the cable first loop  141  to the release bar member  111 . The upper or leading shackle  122  engages the connecting portion  135  at the end of the release bar member slot  115  to be the leading point of engagement with the upper shackle  122 . The pulling force load from the lifting of the anchor chain  101  is applied on the shackle  122  and pulls the release bar member  111  from engagement with the shank eye shackle  22  causing the release pin  31  to break and the connection between the shank eye shackle  22  and release bar member  111  to separate. The release bar member  111  now can apply a pulling force on the cable  140  through the cable first loop  141  that remains connected with the release bar member  111 , though detached from the shank eye shackle  22 . When a pulling force is now applied to raise the anchor  100  after the release pin  31  has disengaged, the anchor chain  101 , which maintains its connection with the cable  140 , transfers the pulling force to the crown end  107  of the anchor  100 . The anchor  100  may then be retrieved from a different point (e.g., the crown end), with a pulling force acting on a different part of the anchor (e.g., the anchor crown end  107 ). The anchor  100  may then be retrieved from the obstruction. 
     The anchor retrieval device  110  may be reset upon retrieval of an obstructed anchor where the device  110  has actuated to release the point of connection and associated connectors at the anchor shank end  102   a . Resetting the device  110  involves replacement of a release pin  31  (and associated nut  35 ) and replacing the connection at the shank eye  106 , which, according to preferred embodiments, involves replacing the shackle  22  if the shackle  22  has fallen from the anchor  100 , and possibly replacing other components when the anchor  100  is ultimately recovered onto the vessel. 
     Referring to  FIGS. 14-17 , an alternate embodiment of an anchor retrieval device  210  is shown making a connection with an anchor  100  and another connection with the anchor rode  200 ′. The release bar member  211  is adjustably provided so that it may be secured at a position along the cable  140 ′, preferably at a location that provides some play in the cable  140 ′ relative to the shackle  22  at the anchor shank end  102   a . The double arrow  209  shown in  FIG. 14  represents a preferred distance for installation of the release bar member  211 , where the shackle  22  is positioned slightly away from the leading end of the shank eye  106  (e.g., a distance shown by double arrow  209 ) when the release bar member  211  is secured. Under normal anchoring conditions (where the anchor  100  is not obstructed) retrieval of the anchor  100  is accomplished through forces that do not actuate the release mechanism of the device  210 . This preferred configuration allows for the withdrawal of the anchor  100  (when the anchor is not obstructed) by having the force of retrieval act on the cable  140 ′ to withdraw the anchor  100  so that the release bar member  211  release mechanism is not actuated, and the release bar member  211  maintains its releasable connection in a connected condition. According to the embodiment illustrated in  FIGS. 14 and 15 , when a force is applied to retrieve an anchor  100  that is not obstructed, then the release pin  31  securing the release bar member  211  to the shank end  102   a  of the anchor  100  does not actuate to release its connection (which in the embodiment of  FIGS. 14-15  is shown secured to the shank eye  106  with a shackle  22 ). 
     The cable  140 ′ may be constructed similar to the cable  140  shown and described herein, and, optionally, a cable thimble  145  may be provided at one or both cable loop ends  141 ′,  143 ′. An exemplary embodiment illustrates a cable  140 ′ having a thimble  145  provided at the second cable loop  143 ′, although, a cable thimble  145  may be provided at each cable loop end  141 ′,  143 ′, if desired. 
     The release bar member  211  has a lateral bore  219  therethrough that is sized to accommodate the passage of the cable  140 ′. A transverse bore  230  is provided in the release bar member  211  to accept a release pin  31  so that the release bar member  211  may be connected to the end of an anchor shank  102 . Preferably, the release bar member  211  is connected to the anchor shank eye  106 . According to a preferred configuration, the release bar member  211  may be connected to the anchor shank end  102   a  so that the release bar connection at the anchor shank eye  106  is releasable upon the application of a predetermined force threshold on the release mechanism. A release pin, such as the pin  31  shown and described herein, may be used to provide the releasable connection. The release bar member  211  may make a connection at the anchor shank  102  using the release pin  31 . According to a preferred embodiment, the connection of the release bar member  211  at the anchor shank end  102   a  may be facilitated by an additional member, such as, for example, the shackle  22 . According to the preferred embodiment illustrated in  FIGS. 14-17 , a shackle  22  is shown forming a releasable connection with the release bar member  211  and the release pin  31 . Though not shown, the release bar member may be configured with arms that may be secured to the anchor shank  102  with a release pin, such as the pin  31 . 
     According to a preferred embodiment, as illustrated in  FIGS. 14-17 , the release bar member  211  also includes a securing mechanism for securing the release bar member  211  to the cable  140 ′. The securing mechanism is shown in a preferred configuration including a plurality of threaded bores  236  and a plurality of set screws  235 . The set screws  235  may be tightened against the cable  140 ′ by turning them in order to provide a clamping force to secure the release bar member  211  at a preferred location along the cable  140 ′. The set screws  235  preferably have a tooled end, such as, for example, a hex head  234  ( FIG. 15 ) for receipt of a matingly associated tool (not shown) to facilitate tightening the set screws  235 . According to a preferred embodiment, the set screws  235  may have a circumferential edge and a concave end that engages with the cable  140 ′. According to a preferred embodiment, the threaded bores  236  are illustrated provided on each side of the lateral bore  219 . Preferably, the bores  236  extend across the channel  219  so that there is a bore portion  236   a  a sufficient distance beyond the channel  219  to accommodate a portion of the cable  140 ′ that may be forced into the bore portion  236   a  by the tightening of a set screw  235 . Though threads are illustrated on the bore portions  236   a , those bore portions  236   a  may be provided without threads. In addition, the bore portions  236   a  may be shallower in depth than the depth shown in  FIG. 17 . 
     The anchor retrieval device  210  may be used in a manner similar to the devices  10 ,  110  shown and described herein. In the embodiment shown in  FIGS. 14-17 , the release bar member securing mechanism is tightened to engage the cable  140 ′ during the installation process. Preferably, the cable  140 ′ may be provided with the release bar member  211  preinstalled thereon, and the cable loop ends  141 ′, 143 ′ may be formed by the crimped fastener clamp  142 ′ at each cable end to retain the release bar member  211  on the cable  140 ′. The optional cable thimbles  145  preferably may be installed prior to the crimping of clamps  142 ′, or alternately, depending on their configuration, may be installed after the release bar member  211  is placed on the cable  140 ′. Another option is to install the release bar member  211  after installing one of the cable thimbles  145  at one end. The release bar member  211  is slidably adjustable over the length of the cable  140 ′ and may be secured to the cable  140 ′ over a range of locations along the cable  140 ′. The device  210  may be installed on an existing anchor  100  by making the connections at the cable ends with the loops  141 ′,  143 ′ and securing the release bar member  211  to the anchor shank end  102   a.    
     According to a preferred method of installation, The cable  140 ′ is connected to the anchor crown end  107 , and then the release bar member  211  (which preferably is already installed or preinstalled on the cable  140 ′), is secured at a location along the cable  140 ′. The cable second loop  143 ′ is secured at the crown end  107  of the anchor  100 . The release member bar  211  is then aligned and secured at a location along the cable  140 ′, which may be done by tightening the set screws  235  against the cable  140 ′ passing through the release bar member  211 . According to a preferred installation configuration, the release bar member  211  is secured at a position along the cable  140 ′ that allows some play in the cable  140 ′ so that when the anchor is obstructed, the shackle  22  and release bar member  211  may be pivoted at the shank end  102   a  from an unobstructed retrieval position to an alternate position, such as, for example, the alternate position shown in  FIG. 15 . The movement of the release bar member  211  to an alternate position (see  FIG. 15 ) facilitates the action of the pulling force on the release pin  31  so that, when the force threshold is met, the release pin  31  may break. The breaking of the release pin  31  releases the connection at the anchor shank end  102   a , which, according to the preferred embodiment shown in  FIGS. 14 and 15 , releases the connection between the release bar member  211  and the shackle  22 . The retrieval may then take place from the crown end  107  where the cable second loop  143 ′ remains attached to the anchor  100 , preferably with a fastener such as the shackle  122 , or other suitable connector. The cable first loop  141 ′ remains attached to the anchor chain  101  (or other portion of the anchor rode), allowing the pulling force applied to the anchor rode to retrieve the anchor  100  from the crown end  107 . 
     According to a preferred embodiment illustrated in  FIGS. 14-17 , the release bar member  211  is held on the cable  140 ′ throughout the retrieval procedure. When the anchor  100  is retrieved on the boat after the release mechanism has actuated, the device  210  may be reset by following the installation procedures using a new release pin  31 . Though the release bar member  211  is shown installed in a preferred arrangement with the cable  140 ′ passing through the lower portion thereof, the release bar member  211  may be installed in alternate orientations, as desired by the user, or for correspondence with the anchor configuration. One alternate example is to orient the release bar member  211  so the cable  140 ′ passes through the upper portion thereof and the release pin  31  connects with the shackle  22  at the lower portion. 
     In some cases, were the retrieval device  210  has actuated, an anchor  100  may be retrieved onto the boat using the reset line  70 , as shown and described herein in connection with the device  10 , as illustrated in  FIGS. 6 and 7 . Alternatively, the retrieval may be done by lifting the anchor  100  onto the boat, and manually orienting the anchor  100  to its proper position. Another alternate procedure when retrieving the anchor  100  onto the boat from the crown end  107 , involves passing a retrieval line (not shown) through the shank eye hole  106  when the anchor shank end  102   a  is reachable (such as when it is on the boat or pulpit), and securing the retrieval line to the shank eye  106 . The anchor with the retrieval line is then lowered and the retrieval line may then be used to hoist the anchor  100  back onto the boat from the shank end  102   a  so that the anchor  100  is returned to its preferred orientation. 
     Though the connection between the release bar member and the anchor shank  102  in the preferred embodiments of  FIGS. 1-17  is illustrated with a shackle (such as the shackle  22 ), the release bar member connection may be made with the release pin  31  connecting the release bar member to the shank eye  106 . Though the release bar member is illustrated making a releasable connection at the anchor shank end  102   a , the release bar member may be oriented to make a fixed connection at the anchor shank and a releasable connection with the anchor node. 
     The marine anchor release and retrieval system, method and devices  10 ,  110 ,  210  may be utilized as part of standard anchoring and anchor retrieval operations consistent with routine boating activities. The devices  10 ,  110 ,  210  are configured so that, preferably, only when an anchor becomes lodged and the retrieval steps are initiated will the release mechanism be activated to relieve the lodged anchor, otherwise the marine anchor release and retrieval system is designed to be a mostly unnoticed part of the normal anchoring system. The system and devices may be constructed to utilize commercially available marine shackles which may be varied in size to provide installation flexibility in an economical manner. The devices  10 ,  110 ,  210  may be constructed to be relatively compact and easily accommodated with a boat&#39;s existing anchoring system. 
     The device  10  is illustrated making a connection where the shackle  22  connects with the anchor shank eye  106  and the retaining bar member first leg  13  and second leg  14  connect with the anchor chain  101 . However, according to an alternate configuration, the shackle  22  may connect with the chain  101  and the retaining bar member  11  may connect with the anchor shank eye  106 . The release mechanism may be provided to release the connection with the anchor chain  101 , such as providing a release pin  31  serving as a fastener at the point of connection made between the device  10  and the anchor chain  101 . Similarly, the release bar member  111  of the retrieval device  110  alternately, may be installed or configured to release the connection with the anchor chain  101 . 
     The retrieval devices  10 ,  110 ,  210  also are adaptable. According to a preferred embodiment, the release pin  31  of the retrieval devices  10 ,  110 ,  210  may be readily removed, bypassed or replaced with a stronger component, such as a heavy steel bolt, in the event permanent mooring is desired, such as, for example, in extreme storm and wind conditions. 
     Though not shown, one or more washers may be provided to facilitate the connections of the bolt  20  onto the release bar  11 , or the release pin  31  onto the shackle  22 . The shackle  22  preferably is installed in a locked position facing the anchor shank eye. Although fastening members are is illustrated as a bolt  20  with a locknut  21 , other suitable mechanisms to attach the device  10  to the chain  101  may be employed. 
     Preferably the anchor retrieval devices  10 ,  110 ,  210  are constructed using a brass release pin  31 . Alternatively, the retrieval devices  10 ,  110 ,  210  and release pin  31  may be constructed from suitable corrosion resistant materials including, for example, stainless steel, bronze, metal, as well as plastics. Various shapes and sizes of the release bar  11 , as well as the release bar member  111 , the release bar member  211 , and other components may be utilized to accommodate connection to the anchor rode mid-link or end link and anchor shank eye  106 . For example, according to an alternate embodiment, a chain “Quick Link” with a “Release Spacer” may be used as an alternative to the release bar member  11 . 
     While the invention has been described with reference to specific embodiments, the description is illustrative and is not to be construed as limiting the scope of the invention. Release pins of different force thresholds may be provided for use with vessels that are different sizes, weights or have different power drives, and may also take into account the weights of different anchors. The size and strength of the components of the retrieval devices  10 ,  110 ,  210  may be varied to match the size and power of the vessel (such as a boat), as well as the anchor that is used for the vessel and the anchor chain used with the anchor. One or more release pins having different force thresholds may be provided with the device or system, and one of them may be selected for use with a force threshold to match the vessel, its power, the anchor and anchor chain, as well as boating conditions. For example, the device may be supplied as a kit that includes one or more release pins that may be selected for use with other components of the device. The device, system and method may be used in conjunction with the existing anchors and anchor lines customarily used by vessels. The components of the devices  10 ,  110 ,  210  may be constructed from a suitable material, including stainless steel. Preferably, the materials used are resistant to water, salt and corrosion that may otherwise affect the operation of the device. Stainless steel, brass, metals, metal alloys and other suitable materials may be used to construct the device. Since, in many instances, the anchor characteristics are selected based on the vessel that the anchor is being used to secure, the release pin may be configured to have its peak force threshold correspond with or have some relationship to the weight of an anchor being used. In addition, the device may be constructed of different sizes and dimensions, as well as the pin structure to further facilitate matching the device break away force threshold to the force of the vessel that provides the pulling power to actuate the release of the device  10 ,  110 ,  210  to disconnect the anchor and chain connection made with the device  10 ,  110 ,  210 . 
     Though the device, method and system are described in connection with preferred embodiments with an anchor having a crown eye, other anchors not having a crown eye may be used. A connection at the crown end may be made with a suitable connecting mechanism. For example, a hole may be drilled in the anchor (e.g., at the crown area) so that the crown area or a second connection with the anchor line  101  may be made (e.g., by passing a bolt through to secure the chain). 
     Various modifications and changes may occur to those skilled in the art without departing from the spirit and scope of the invention described herein and as defined by the appended claims.