Patent Publication Number: US-4921252-A

Title: Iron type golf club head with integral sighting and alignment means

Description:
RELATED APPLICATIONS 
     This application is a continuation-in-part of Ser. No. 07/095,675 filed Sept. 14, 1987 entitled IRON TYPE GOLF CLUB HEAD WITH INTEGRAL SIGHTING AND ALIGNMENT MEANS. 
    
    
     BACKGROUND OF THE INVENTION 
     The present invention relates to an iron type golf club head, and in particular to a peripheral weighted, cavity back iron type golf club head having an alignment and sighting means overlaying a portion of the back cavity to aid a golfer in positioning the club head in a direction square to the intended target and including a toe weight mass adjacent said alignment and sighting means. 
     Iron type golf clubs generally are used to hit a golf ball at a specific target, such as a putting green, and for specific distances. The iron type clubs are designed with various degrees of loft and length in order to control the trajectory and distance of golf ball is hit. Conventional irons range from a minimum of about 16 degrees for a one iron to a maximum of about 60 degrees for a wedge type club. Traditionally, a set of irons will include at least eight to ten clubs each having varying degrees of loft within the above range. As individual clubs in a conventional set of irons become more lofted, the club faces become higher or wider, particularly in the area toward the toe of the club head, and the top or top ridge formed on the top of the club head is formed in a diverging angular direction which generally extends upwardly and outwardly from the hosel toward the toe of the golf club head. This conventional structure has been developed for iron type golf club heads in order to maximize the weighting characteristics of the golf club head and to maximize the ball striking surface on the various sized golf club heads. Whereas this type configuration works quite well for these purposes, the outwardly diverging plane of the top edge or top ridge line of the club head tends to be confusing and improper if it is used for alignment purposes. This configuration also results in a club having an uppermost toe portion which is located well above and away from the club&#39;s center of percussion and center of gravity. The weight of the club head at this uppermost position is believed to minimize effectiveness and may be detrimental to the overall performance of the club. 
     A patent to Swanson, U.S. Pat. No. 4,345,763, discloses a club with a rectangular club face and a top ridge line extending straight across the entire length of the ball striking face in a direction perpendicular to the intended target line, for alignment purposes. However, that design provides a completely different structure which is non-traditional in shape, weight distribution and strikeability characteristics. 
     Another patent to Shea U.S. Pat. No. 1,319,802 shows a putter whose loft is conventionally less than 16 degrees, having an elevated horizontal portion 3 which serves as a guide when a player addresses a golf ball. 
     The present invention relates to an iron type golf club head which provides the most desirable characteristics of optimum weight distribution and greater ball strikability potential combined with an easy to use sighting or alignment means formed on the uppermost portion of the top ridge of the club head. The alignment means enables a player &#34;at address&#34; to position the club head square to the intended target line. 
     The golf club head of the present invention includes a sighting alignment section on the upper portion of the top ridge which is perpendicular to the intended target line of flight and is preferably formed parallel to the longitudinal axis between the heel and toe of the club face which is perpendicular to the intended line of flight. This sighting alignment section is located on the upper portion of the top ridge adjacent to and substantially at the upper toe portion of the club head and is substantially parallel to the sole of the club head and therefore substantially horizontal to the ground when the club head is addressed to the ball. 
     The sighting alignment section is formed as an integral part of the club head to enhance the squareness thereof when addressing the ball. The sighting alignment section aids in aligning the eyes toward the intended target and facilitates a ninety degree alignment position or a square club head position to the intended target or direction by providing an optimum focal point on the club head. The sighting alignment section is located on the uppermost portion of the club head and provides the golfer with an unobstructed sighting and alignment means that is always visible, notwithstanding the location of the sole of the club head which at times may not be seen as, for example, if it lies in heavy or tall grass. 
     In the preferred embodiments, the &#34;square&#34; portion of the top ridge of the club head which forms the sighting alignment area would extend approximately one-third to two-thirds of the distance across the ball striking face of the club head. It is also contemplated that the sighting and alignment means may be combined with an arrow, lines or other suitable indicia formed on the face of the club head to further enhance the ability of the golfer to squarely align the club head at the target. Such an arrow, lines or other indicia would be perpendicular to the &#34;square&#34; portion of the top ridge and would therefore generally indicate the intended line of flight. 
     The design of the club head of the present invention redistributes the weight which would normally be adjacent the upper toe portion and at the widest or thickest sole area of a golf club head and repositions it closer to the center of gravity. 
     The mass removed from the upper toe portion and sole area is formed as a weight mass closer to the center of gravity within the rear cavity of the club head adjacent the toe portion. This weight distribution provides improved control and feel. 
     Various embodiments of the weight mass are located at the toe in a high, low and central position as well as freestanding within the cavity and as a separator within the cavity forming two smaller cavities. 
     Among the objects of the present invention are the provision of an iron type golf club head having improved weighting and ball striking characteristics in combination with an alignment and sighting means on an upper portion of the top ridge of the club head to enhance the ability of a player to properly and easily align the club head with the intended target line. 
     Another object is to provide a club head having alignment indicia on both the top ridge and the face of the club head combined with a weighting mass in the rear cavity of the club head. 
     Still another object is to provide a golf club head having an alignment and sighting means on the upper top ridge portion which displaces a weighted mass relocated between the center of gravity and the toe portion within the rear cavity of the club head. 
     Other objects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objects and advantages will be realized and attained by means of the elements and combinations particularly pointed out in the appended claims. 
     The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate several embodiments of the invention and, together with the description, serve to explain the principles of the invention. 
    
    
     DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a front elevational view of a first embodiment of the present invention on a cast type golf club head. 
     FIG. 2 is a rear elevational view of FIG. 1. 
     FIG. 3 is a side elevational view of FIG. 1. 
     FIG. 4 is a top plan view of FIG. 1. 
     FIG. 5 is a front elevational view of a second embodiment of the present invention. 
     FIG. 6 is a front elevational view of a third embodiment of the present invention. 
     FIG. 7 is a front elevational view of a fourth embodiment of the present invention. 
     FIG. 8 is a top plan view of FIG. 7. 
     FIG. 9 is a front elevational view of a fifth embodiment of the present invention. 
     FIG. 10 is a front elevational view of the present invention on a forged type golf club head. 
     FIG. 11 is a front elevational view of a sixth embodiment of the present invention. 
     FIG. 12a is a front elevational view of a conventional golf club. 
     FIG. 12b is a front elevational view of a golf club according to the present invention. 
     FIG. 13a is a top view of a conventional golf club. 
     FIG. 13b is a top view of a golf club according to the present invention. 
     FIG. 14a is an end view of a conventional golf club. 
     FIG. 14b is an end view of a golf club according to the present invention. 
     FIG. 15 is a rear elevational view of a seventh embodiment of the present invention. 
     FIG. 16 is a rear elevational view of an eighth embodiment of the present invention. 
     FIG. 17 is a rear elevational view of a ninth embodiment of the present invention. 
     FIG. 18 is a rear elevational view of a tenth embodiment of the present invention. 
     FIG. 19 is a rear elevational view of an eleventh embodiment of the present invention. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Reference will now be made in detail to the present preferred embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. 
     The drawings illustrate a conventional cast type iron golf club head 10 having a loft angle within the range of approximately 16 degrees to 60 degrees which is perimeter weighted and has a cavity back. The club head includes a hosel 12, ball striking face 14, sole 16, heel 18 and toe 20. The ball striking face 14 encompasses the area on the front of the club head which is designed to impact the ball and hit the ball on an intended line of flight perpendicular to the club face. The ball striking face 14 shown in FIG. 1 includes a plurality of grooves 22 of conventional design which, when viewed by a golfer, are perpendicular to the normal intended line of flight. These grooves 22 may be, but are not necessarily, parallel to a portion of the front bottom edge 17 of the striking face. Although the grooves shown in the drawings are preferably parallel, the present invention can be applied to clubs having other club face markings such as diamond or circular shaped indentations, or other random or irregularly spaced grooves formed in the club face. As described below, however, the disclosed parallel grooves are preferred because they can be used in combination with the top ridge alignment feature of the present invention. 
     The club head includes a top ridge 23 having a first portion 24 adjacent the heel 18 which diverges and extends upwardly and outwardly from the heel 18 toward the toe 20 to a point 25 where it changes direction and forms a second straight sighting section 26 which extends substantially horizontally and perpendicular to the intended line of flight. This second portion 26 of the top ridge 23 serves as an alignment and sighting means of the present invention. As shown in FIG. 1, the design of the present invention eliminates the wasted weight at the uppermost top of the toe found in conventional clubs, that wasted weight being illustrated by the area 28 shown in phantom. 
     The straight sighting section 26 on the upper portion of the top ridge 23 continues in a longitudinal direction from the point 25, where it meets the first portion 24, toward the toe 20 of the club head. The sighting section 26, as shown in FIG. 4, is a flat area located above the ball striking face 14 and extending from the toe 20 to the point 25 located partway across the width and above the ball striking face. As shown, point 25 is spaced a substantial distance from the hosel 12, and in the embodiment shown in FIGS. 1-4 has a length equal to approximately one-third to one-half of the length of the top ridge 23. The preferred sighting section 26 has a thickness, as shown in FIG. 4, although it could be in the form of a straight edge formed by the intersection of the back and front faces of the club. The upper surface of the sighting section 26 is preferably flat and parallel to the sole 16 at the bottom of the club head 10 and is in the same direction as the grooves 22 on the ball striking face 14 so that the sighting section 26 is parallel to the ground and perpendicular to the intended line of flight when a golfer aligns the club with the ball. 
     As shown in FIG. 4, the club head can further include an alignment indicia 30 formed as a line along the longitudinal axis of the sighting section 26 as shown. It will be appreciated that the indicia may take the form of a groove formed in the sighting area or any other suitable marking means. The alignment indicia 30 is parallel to the grooves 22 on the ball striking face 14 and further serves to visually aid a golfer in positioning the club head &#34;square&#34; to the intended target line. 
     As shown in FIG. 2 which illustrates the rear face of the golf club head 10, the present invention in the preferred embodiment includes perimeter weight member 40. The sighting section 26 relocates a section 42 of the perimeter weight member 40 to a lower position closer to the center of gravity (CG) under the sighting section 26 thereby moving the overall perimeter weight lower and closer to the center of gravity. Therefore, the &#34;wasted weight&#34; in the uppermost toe portion 28 of a conventional golf club moves to a location closer to the ball striking area and this improved distribution of weight provides increased feel and control when executing a golf shot. 
     In use, when the club head 10 is placed behind the ball, the position of the club head 10 is adjusted until the sighting section 26 is perceived to be perpendicular or &#34;square&#34; to the intended target line. Because of the &#34;straight-line&#34; configuration of the sighting section 26, adjusting the club head to the proper position is relatively simple in optical terms as compared to conventional golf clubs which have top ridge lines which diverge in an upward and outward direction all the way between the toe and heel of the club head. Once the sighting area 26 is perceived to be square to the target line, the golfer may initiate a back swing, assured that the club head has been started from the proper &#34;address&#34; position. This alignment feature thereby eliminates any necessity of making further adjustments during the golf swing itself. 
     Typically, the iron type golf head of the present invention from toe to heel would be approximately three inches long and the sighting area would be at least approximately one inch or longer depending upon the shape, height and length of the club head. 
     FIG. 5 illustrates a second embodiment of a golf club head 100 of the present invention having essentially the same characteristics as the club head 10 described hereinabove. In this embodiment, the club face 114 is provided with a series of indentations in place of the grooves shown in the embodiment described above. The club head 100 includes a sighting section 126 as described hereinabove to align the club head &#34;square&#34; to the target line. The embodiment further includes alignment indicia shown in the form of a directional arrow 130, located on the ball striking face 114 and positioned below the sighting section 126. The lower portion of the alignment indicia 130 terminates in a point 132 on the striking face 114 positioned approximately below the middle of the sighting portion 126. The directional arrow 130 has a width extending from a location adjacent the toe 120 to a second location adjacent a point 127 on the horizontal sighting section 126 between the toe 120 and the point 125 where the sighting section meets the diverging portion 124 of the top ridge 123. The lower portion of the alignment indicia 130 terminates at a point 132 on the striking face positioned approximately below the middle of the sighting portion 126. When the club head is properly aligned &#34;square&#34; to the target line, the alignment indicia arrow 130 points directly to the target. 
     FIG. 6 illustrates another embodiment of an iron type golf club head 200 of the present invention which also is essentially the same as the club head 10 described with respect to FIGS. 1 through 4. In this embodiment, the club head 200 includes a sighting section 226 which extends from the upper portion of the top ridge 224 of the club head 200 and further includes alignment indicia 230 located between the toe 220 and the grooves 222 on the ball striking face 214 of the club head 200. 
     In both the embodiments of FIGS. 5 and 6, the suitable alignment indicia are used to further aid the golfer to position the club head &#34;square&#34; to the target line. It becomes a matter of personal preference as to whether a golfer would prefer to have a wide alignment indicia extending into the ball striking face or narrower indicia positioned only on the toe portion of the club head. 
     FIGS. 7 and 8 illustrate still another embodiment of an iron type golf club head 300 of the present invention which is the same type as described hereinabove. In this embodiment, the club head 300 includes a sighting section 326 which extends to a point 325 positioned directly over the center of gravity (CG) of the club head 300. The sighting section 326 is formed on the upper portion of the top ridge 324 from upper toe 320 to a point 325 of the club head 300 and is parallel to and extends partway above the grooves 322 on the ball striking face 314. As shown in FIG. 8, sight lines 352 are formed on the sighting section 326 and extend downwardly across the ball striking face 314 through the center of gravity (CG). These sight lines are parallel with the intended line of flight. The lines, therefore, allow a golfer to place the ball directly at the center of percussion. The golfer can then properly align the club head by utilizing the sighting section 326 at the uppermost portion on the club face. As a result, the golfer using the club can visually align the ball with the center of percussion to obtain maximum power and control. 
     FIG. 9 illustrates still another embodiment of an iron type golf club head 400 of the present invention which is a similar type as described hereinabove. In this embodiment, the club head 400 includes a sighting section 426 which extends to a point 425 located approximately two-thirds of the distance between the toe 420 and heel 418 of the club head 400. The top ridge 424 of the club head 400 includes a section 430 located at the toe 420 which tapers downwardly as shown. With this structure, the sighting section 426 is centrally located on the top ridge 424 of the club head above the center of gravity (CG) on the club face 414 thereby providing greater ease for a golfer to focus on both the sighting section and the center of percussion to aid the golfer in aligning the club head 400 perpendicular to the target line. 
     FIG. 10 illustrates a forged type golf club head 500 having a sighting section 526. It will be appreciated that any of the embodiments described with reference to FIGS. 1-8 and shown in the drawings on cast type, perimeter weighted golf club heads, are equally applicable to forged type golf club heads of the type shown in FIG. 10. 
     FIG. 11 illustrates an embodiment of an iron type golf club head 600 of the present invention which is similar to the embodiment of FIG. 9. A sighting section 626 extends from adjacent the toe 620 approximately two-thirds of the distance along the top ridge 626 toward the heel 618 of the club head. 
     FIGS. 12a, 12b, 13a, 13b, 14a, and 14b are comparative views of conventional high toe golf club heads and golf club heads made in accordance with the present invention taken from the front, top and end of the clubs. 
     FIG. 15 illustrates a seventh embodiment of an iron type golf club head 700 of the present invention. The club head 700 includes a heel 718, toe 720 and a rear cavity 721 formed by a peripheral mass 722 distributed around the lower portion and sides of the periphery of the club head 700. The club head 700 includes a top ridge 724 having a sighting section 726 which overlies a portion of the rear cavity 721 and which is perpendicular to the intended line of flight as described with the embodiments hereinabove. The club head 700 includes a weight member 730 formed adjacent the toe 720 within the cavity 721 at the rear of the club head 700. The weight mass is positioned within the cavity 721 toward and adjacent to the upper portion thereof. This weight member 730 more effectively replaces the weight removed from the upper toe portion of the club head 700 to form the sighting section 726 and relocates it closer to and in a more horizontal relationship to the center of gravity (CG) of the club head 700. 
     FIG. 16 illustrates a eighth embodiment of an iron type golf club head 800 of the present invention. The club head 800 includes a heel 818, toe 820 and rear cavity 821 formed by a peripheral mass 822 distributed around the bottom or sole portion and sides of the periphery of the club head 800. The club head 800 includes a top ridge 824 having a sighting section 826 which overlies a portion of the rear cavity 821 and which is perpendicular to the intended line of flight as described with the embodiments hereinabove. The club head 800 further includes a weight member 830 formed adjacent the toe 820 and centrally located within the cavity 821 at the rear of the club head 800. The weight member 830 more effectively replaces the weight removed from the upper toe portion of the club head 800 from the sighting section 826 and relocates it closer to and in a more horizontal relationship to the center of gravity (CG) on the club head 800. The relocation of the weight mass 830 provides a better overall weight distribution of the club head 800 to produce greater transfer of energy for superior control, accuracy and distance when properly executing the golf swing to strike the golf ball. 
     FIG. 17 illustrates a ninth embodiment of an iron type golf club head 900 of the present invention. The club head 900 includes a heel 918, toe 920 and rear cavity 921 formed by a peripheral mass 922 distributed around the bottom and sides of the periphery of the club head 900. The club head 900 includes a top ridge 924 having a sighting section 926 which overlies a portion of the rear cavity 921 and which is perpendicular to the intended line of flight as described with the embodiments hereinabove. The club head 900 further includes a weight member 930 formed adjacent the toe 920 within the cavity 921 at the rear of the club head 900 and adjacent the lower portion thereof. The weight member 930 effectively replaces the weight removed from the upper toe portion of the club head 900 to form the sighting section 926 and relocates it closer to the center of gravity (CG) to improve the overall club head weight distribution balance for greater performance. 
     FIG. 18 illustrates a tenth embodiment of an iron type golf club head 1000 of the present invention. The club head 1000 includes a heel 1018, toe 1020 and rear cavity 1021 formed by a peripheral mass 1022 distributed around the bottom and sides of the periphery of the club head 1000. The club head 1000 includes a top ridge 1024 having a sighting section 1026 which overlies a portion of the rear cavity 1021 and which is perpendicular to the intended line of flight as described with the embodiments hereinabove. The club head 1000 further includes a weight member 1030 in the form of a strut spanning the cavity 1021 from the upper surface to the lower surface at the rear of the club head. The strut weight member 1030 is located adjacent the toe 1020 and forms a secondary cavity 1032 at the toe 1020. The strut weight member 1030 replaces the weight removed from the upper toe portion of the club head 1000 which was relocated to form the sighting section 1026 and relocates it closer to the center of gravity (CG) to improve the overall balance of the club head weight distribution for greater performance, control and much better feel or sensation impacting a golf ball. 
     FIG. 19 illustrates an eleventh embodiment of an iron type golf club head 1100 of the present invention. The club head 1100 includes a heel 1118, toe 1120 and rear cavity 1121 formed by a peripheral mass 1122 distributed around the bottom and sides of the periphery of the club head 1100. The club head 1100 includes a top ridge 1124 having a sighting section 1126 which overlies a portion of the rear cavity 1121 and which is perpendicular to the intended line of flight as described with the embodiments hereinabove. The club head 1100 includes a freestanding weight member 1130 formed adjacent the toe 1120 within the cavity 1121 at the rear of the club head 1100 in the form of a cylindrical disc which is sized to replace the weight removed from the upper toe portion of the club head 1100 to form the sighting section 1126. As with the embodiments described hereinabove, the location of the weight member nearer the center of the club head 100 improves the overall club head weight distribution which results in improved performance in striking a golf ball. 
     In the embodiments of FIGS. 15 to 19, the weighted mass within the rear cavity has at least a portion thereof lying in a plane passing through the center of gravity (CG) along the horizontal or longitudinal axis of the club head. 
     It will be appreciated that various changes may be made in the club head design described above without departing from the scope of the present invention as defined in the following claims.