US3865065A

US3865065A - Anchor boom

Info

Publication number: US3865065A
Application number: US405037A
Authority: US
Inventors: Roy James Dennis; Klemence Kielpikowski
Original assignee: Roy James Dennis
Current assignee: RONSTAN MARINE EQUIPMENT PTY Ltd 220-222 BAY RD SANDRINGHA VICTORIA AUSTRALIA A CORP OF VICTORIA AUSTRALIA
Priority date: 1972-10-11
Filing date: 1973-10-10
Publication date: 1975-02-11
Anticipated expiration: 1992-02-11
Also published as: GB1416090A; AU6124973A; ZA737890B; DE2350896A1; AU472094B2

Abstract

An anchor boom for securing to the bow of a small boat which comprises a mounting bracket which projects over the bow of the boat and a guide arm hinged to the mounting bracket, the mounting bracket having a roller near the hinge point, and the swinging end of the guide arm having a pair of rollers which function to guide the anchor rope as the anchor is drawn upwardly. As the anchor reaches the boom, the shank passes between the rollers on the guide arm and over the roller on the bracket, and continued tension applied to the anchor rope results in the shank assuming a horizontal position, the guide arm being lifted by the shank about its hinge means, and the flukes of the anchor being held a short distance forwardly of the bow of the boat.

Description

Melted States Patent 1 Dennis et all,

[ ANCHOR BOOM [75] Inventors: Roy James Dennis, Fulham;

Klemence Kielpikowski, West Beach, both of South Australia, Australia [73] Assignee: Roy James Dennis, Fulham, South Australia, Australia [22] Filed: Oct. 10, 1973 [21] Appl. No.: 405,037

[30] Foreign Application Priority Data Oct. 11, 1972 Australia 0786/72 [52] U.S. Cl. 114/210 [51] Int. Cl B6311 21/22 [58] Field of Search 114/210, 206 R; 294/84; 9/30, 34, 35

[56] References Cited UNITED STATES PATENTS 1,749,193 3/1930 Schauman et a1. 114/210 2,718,865 9/1955 Kurzmann 114/210 1 Feb. 111, 1975 2,899,924 8/1959 Good 114/210 3,186,373 6/1965 Whitney 114/210 Primary Examiner-Trygve M. Blix Assistant Examiner-Charles E. Frankfort Attorney, Agent, or Firm-Jay L. Chaskin, Esq.

[57] ABSTRACT An anchor boom for securing to the bow of a small boat which comprises a mounting bracket which projects over the bow of the boat and a guide arm hinged to the mounting bracket, the mounting bracket having a roller near the hinge point, and the swinging end of the guide arm having a pair of rollers which function to guide the anchor rope as the anchor is drawn upwardly. As the anchor reaches the boom, the shank passes between the rollers on the guide arm and over the roller on the bracket, and continued tension applied to the anchor rope results in the shank assuming a horizontal position, the guide arm being lifted by the shank about its hinge means, and the flukes of the anchor being held a short distance forwardly of the bow of the boat.

6 Claims, 5 Drawing Figures PATENTEDFEBI 1 I 3.865.065 sum 20F 2 FIG 5 ANCHOR BOOM This invention relates to an anchor boom which is useful for securing to the bow of a small boat and for the guiding of the anchor rope during the raising or lowering of the anchor, and positioning of the anchor shank after the anchor has been raised.

Various types of anchor booms have been proposed heretofore. For example in the US. Pat. No. 3,509,847 issued to Persinger there is described an anchor boom which utilises an anchor shank tube having a roller at its rear or upper end, and through which firstly the rope and then (upon raising ofthe anchor) the anchor shank passes. The tube is arranged to tilt about a hinge mounting carried on the bow of a boat. With such an arrangement there is an imbalance, in that the main part of the weight of the anchor and shank overhangs the bow of the boat and it is retained in position solely by the tension on the anchor rope. Furthermore there is thought to be some danger of scuffing of the anchor rope as it moves upwardly through the tube.

In the US. Pat. No. 3,481,301 issued to E. F. Carroll there is described an anchor cradle and lock wherein the rope, and subsequently the anchor shank, is drawn up over a curved base plate so that upon full raising of the anchor the shank becomes horizontal. Once again the rope rubs over the curved base plate and the shank also moves over the curved base plate, there being considerable friction which can damage the rope. Furthermore use is made of a lock device which needs to be tripped to release the anchor.

In the US. Pat. No. 3,675,608 issued to Webb, there is described an anchor carrier and guide wherein one channel member slides within the other against a spring when the anchor is fully raised. The spring assists in simplifying the lowering of the anchor.

In the specification accompanying US. Pat. No. 3,635,l 87 issued to Webb, there is described an alternative arrangement which also utilises one Channel slideable and tiltable within the other, and a sliding anchor holding tube.

BACKGROUND OF THE INVENTION There is a need for a simple anchor boom wherein the anchor rope and the shank both pass over rollers so as to avoid danger of damage to the rope due to scuffing, and further so as to avoid the need for excessive forces being applied for example to an anchor rope so as to overcome the frictional interengagement, and at the same time to provide a device which is free of slideable members, locks and other mechanisms which may become damaged, or difficult to operate under the adverse conditions, for example corrosion, frequently encountered with small boats. It is also desirable that an anchor boom should be operative to lay the anchor in a substantially horizontal position with the flukes well in front of the boat so that damage to the boat through swinging of the flukes is substantially avoided. it is further desirable that the anchor should be easily released, and yet that the tension on the anchor rope holding it in its position should be relatively small.

BRIEF SUMMARY OF THE INVENTION Briefly the invention makes use of an anchor boom having a mounting bracket with a roller at its forward end, there also being a hinge at the forward end of the mounting bracket and a guide arm hinged to the mounting bracket so that the guide arm can move from a horizontal position at least to a downwardly sloping position. The front end of the guide arm is provided with at least one roller to guide a rope and, upon raising of the anchor, the anchor shank. The arrangement is such that as the anchor is drawn upwardly through the guide arm, it reaches an overbalance point and continued tension applied to the rope causes the shank to occupy a horizontal position with the flukes being retained forwardly of the boat. Conveniently the position of the hinge can be such that the anchor has a slight force tending to cause it to tilt, this slight force being the only force applied to the anchor rope to retain the anchor in its upper position. With the anchor boom the control of the anchor can be effected from within a boat without the need for the boatman to be at the bow of the boat.

More specifically, the invention consists of an anchor boom which comprises a mounting bracket having a pair of spaced side walls, a transverse wall joining the mounting bracket side walls, a roller support pin extending between the side walls near one end thereof, an inner guide roller supported by the support pin for rotational movement, a guide arm also having a pair of spaced side walls joined by a transverse wall, a further roller support pin extending between the guide arm side walls near one end thereof, an outer guide roller supported by the further support pin for rotational movement, bridge means also extending between the guide arm side walls and spaced from the outer guide roller to define therebetween an anchor shank guide space, and hinge means interconnecting the other end of the guide arm to said end of the mounting bracket which carries the roller.

BRIEF DESCRIPTION OF THE DRAWINGS An embodiment of the invention is described hereunder in some detail with reference to and as illustrated in the accompanying drawings, in which:

FIG. 1 illustrates the anchor boom secured to the bow of a boat with the anchor raised almost to its fully raised position,

FIG. 2 illustrates the anchor in its fully raised positron,

FIG. 3 is a plan view of the anchor boom but with the guide arm extended,

FIG. 4 is a side elevation of the anchor boom but with the guide arm in its downwardly tilted position, and

FIG. 5 is an end elevation of FIG. 3.

In this embodiment an anchor boom 10 comprises two main portions which are hinged together, one being a mounting bracket 11 arranged to be secured to the bow of a boat, and the other being a tiltable guide arm 12 arranged to tilt from the sloping position shown in FIGS. 1 and 4 to the extended or horizontal position shown in FIGS. 2, 3 and 5.

The mounting bracket 11 is provided wth two side walls which are spaced and parallel to one another, and designated 15, the side walls being interconnected by a transverse wall 16. Similarly the guide arm 12 also comprises a pair of spaced parallel side walls 17 which are interconnected by a further transverse wall 18. The

corresponding side walls

15 and 17 are joined by a pair of coaxial hinge rivets 20 as shown more particularly in FIGS. 3 and 4. When the guide arm 12 is in its downwardly sloping position as illustrated in FIGS. 1 and 4, the ends of the side walls 15 and side walls 17 respectively designated 23 and 24 abut one another as shown more particularly in FIG. 4 and thereby limit the tilting of the guide arm 12. These ends may if desired be folded to form for example outwardly formed flanges to provide increased abutment surfaces.

Adjacent the hinge rivets at the outer end of the mounting bracket 11 there is positioned a roller support pin 27 which supports a roller 28 for rotational movement, the curved surface of the roller 28 having a groove extending around it.

Similarly the outer or swinging end of the guide arm 12 is provided with a further roller support pin 29 which rotationally supports a further roller 30 of similar configuration to the roller 28.

As shown in FIG. 2, as the anchor is drawn fully to its raised position the guide arm 12 occupies a horizontal position, and to effect this bridge means is positioned above the roller 30, the bridge means constituting a further roller 31. The bridge means can however be a bar or other means.

The anchor shank guide space between the

rollers

30 and 31 is made sufficient to accommodate an anchor shank designated 34 to which an anchor rope 35 is attached, and in some cases it is desirable to ensure that the anchor 34 cannot be dislodged under any adverse conditions. In such an instance use is made of a retaining pin designated 36 which, as shown in FIG. 2, will prevent the anchor from tilting.

The weight of the guide arm and the flukes of the anchor is such that when the tension on the rope 35 is slightly relaxed the anchor tilts the guide arm downwardly and the anchor then freely lowers itself into the water under the effects of gravity.

it will be seen immediately that the anchor boom of this invention is so arranged that the danger of damage to an anchor rope is substantially eliminated, considerable transverse forces can be applied, and there is no complicated mechanism in the device which is likely to result in high maintenance or failure of the device.

What we claim is:

1. An anchor boom for the guiding of an anchor rope during raising and lowering of an anchor, and for positioning the anchor shank when the anchor is in its raised position, comprising a mounting bracket having a pair of spaced side walls, a transverse wall joining the mounting bracket side walls and defining therewith an anchor shank guide space, a roller support pin extend ing between the side walls near the forward end thereof and an inner guide roller journalled on the support pin for rotational movement,

a guide arm also having a pair of spaced side walls joined by a transverse wall, a further roller support pin extending between the guide arm side walls near the forward end thereof, an outer guide roller journalled on the further support pin for rotational movement, bridge means also extending between the guide arm side walls and spaced from the outer guide roller to define therebetween an anchor shank guide space, and

hinge means interconnecting the rear end of the guide arm to said forward end of the mounting bracket, so constructed and arranged that said anchor shank guide spaces are aligned when the anchor is in its raised position.

2. An anchor boom according to claim 1 wherein said bridge means comprises a further roller support pin extending between said guide arm side walls having journalled thereon a retaining roller for rotational movement.

3. An anchor boom according to claim 1 wherein both said mounting bracket and said guide arm have a U-shaped cross-section for part of their respective lengths.

4. An anchor boom according to claim 1 wherein said hinge means comprise a pair of coaxial hinge rivets pivotally joining respective said mounting bracket side walls to corresponding respective said guide arm side walls.

5. An anchor boom according to claim 1 wherein the adjacent ends of said mounting bracket and said guide arm are abutment edges which become contiguous wherein the guide arm hinges to slope downwardly from the mounting bracket.

6. An anchor boom according to claim 1 further comprising a withdrawable pin extending through aligned apertures in the side walls of the mounting bracket near the end other than said end having said roller support pin.

Claims

1. An anchor boom for the guiding of an anchor rope during raising and lowering of an anchor, and for positioning the anchor shank when the anchor is in its raised position, comprising a mounting bracket having a pair of spaced side walls, a transverse wall joining the mounting bracket side walls and defining therewith an anchor shank guide space, a roller support pin extending between the side walls near the forward end thereof and an inner guide roller journalled on the support pin for rotational movement, a guide arm also having a pair of spaced side walls joined by a transverse wall, a further roller support pin extending between the guide arm side walls near the forward end thereof, an outer guide roller journalled on the further support pin for rotational movement, bridge means also extending between the guide arm side walls and spaced from the outer guide roller to define therebetween an anchor shank guide space, and hinge means interconnecting the rear end of the guide arm to said forward end of the mounting bracket, so constructed and arranged that said anchor shank guide spaces are aligned when the anchor is in its raised position.