Source: https://patents.justia.com/patent/10322321
Timestamp: 2019-07-18 21:48:53
Document Index: 462666898

Matched Legal Cases: ['arts 410', 'arts 410', 'arts 410', 'arts 410', 'arts 410', 'arts 410', 'arts 410', 'arts 410', 'arts 410', 'arts 410', 'arts 410', 'arts 410', 'arts 410', 'arts 410', 'arts 410', 'arts 410', 'arts 410', 'arts 410', 'arts 410', 'arts 410', 'arts 410', 'arts 410', 'arts 410', 'arts 410', 'arts 410', 'arts 410', 'arts 410', 'arts 410', 'arts 410', 'arts 410', 'arts 410', 'arts 410', 'arts 510', 'arts 510', 'arts 510', 'arts 510', 'arts 510', 'arts 510', 'arts 510', 'arts 510', 'arts 510', 'arts 510', 'arts 510', 'arts 510', 'arts 510', 'arts 510', 'arts 510', 'arts 510', 'arts 510', 'arts 610', 'arts 610', 'arts 610', 'arts 610', 'arts 610', 'arts 610']

US Patent for Golf clubs and golf club heads having interchangeable rear body members Patent (Patent # 10,322,321 issued June 18, 2019) - Justia Patents Search
Justia Patents Wood CompositionUS Patent for Golf clubs and golf club heads having interchangeable rear body members Patent (Patent # 10,322,321)
Mar 10, 2015 - Karsten Manufacturing Corporation
The club head 102 itself also may be constructed in any suitable or desired manner and/or from any suitable or desired materials without departing from this invention, including from conventional materials and/or in conventional manners known and used in the art. For example, in the example structure 102 shown in FIGS. 1A and 1B, the club head 102 includes a ball striking face member 102a (optionally including a ball striking face plate 102b integrally formed with the face member 102a or attached to club such that the face plate 102b and a frame member together constitute the overall face member 102a). The club head 102 of this illustrated example further includes a crown 102c, a sole 102d, and at least one body portion 102e located between the crown or top portion 102c and the sole 102d (e.g., material extending from the face member 102a, around the club head periphery from the heel to the toe). This body portion 102e, which extends to a location substantially opposite the striking face, may include a rear portion of the club head structure.
A wide variety of overall club head constructions are possible without departing from this invention. For example, if desired, some or all of the various individual parts of the club head 102 described above may be made from multiple pieces that are connected together (e.g., by welding, adhesives, or other fusing techniques; by mechanical connectors; etc.). The various parts (e.g., crown 102c, sole 102d, and/or body portion(s) 102e) may be made from any desired materials and combinations of different materials, including materials that are conventionally known and used in the art, such as metal materials, including lightweight metal materials. More specific examples of suitable lightweight metal materials include steel, titanium and titanium alloys, aluminum and aluminum alloys, magnesium and magnesium alloys, etc.
As additional examples or alternatives, in order to reduce the club head 102 weight, if desired, one or more portions of the club head structure 102 advantageously may be made from a composite material, such as from carbon fiber composite materials that are conventionally known and used in the art. Other suitable composite or other non-metal materials that may be used for one or more portions of the club head structure 102 include, for example: fiberglass composite materials, basalt fiber composite materials, polymer materials, etc. As some more specific examples, if desired, at least some portion(s) of the crown member 102c may be made from composite or other non-metal materials. Additionally or alternatively, if desired, at least some portion(s) of the sole member 102d may be made from composite or other non-metal materials. As still additional examples or alternatives, if desired, one or more portions of the club head's body member 102e (the region of material extending between the crown 102c and the sole 102d) may be made from composite or other non-metal materials. As yet further examples, if desired, the entire body portion of the club head aft of a club head face member 102a (also called an “aft body”), or optionally the entire club head, may be made from composite or other non-metal materials without departing from this invention. The composite or other non-metal material(s) may be incorporated as part of the club head structure 102 in any desired manner, including in conventional manners that are known and used in the art. Reducing the club head's weight (e.g., through the use of composite or other non-metal materials, lightweight metals, metallic foam or other cellular structured materials, etc.) allows club designers and/or club fitters to selectively position additional weight in the overall club head structure 102, e.g., to desirable locations to increase the moment of inertia, affect the center of gravity location, and/or affect other playability characteristics of the club head structure 102 (e.g., to draw or fade bias a club head; to help get shots airborne by providing a low center of gravity; to help produce a lower, more boring ball flight; to help correct or compensate for swing flaws that produce undesired ball flights, such as hooks or slices, ballooning shots, etc.; etc.).
The various individual parts that make up a club head structure 102, if made from multiple pieces, may be engaged with one another and/or held together in any suitable or desired manner, including in conventional manners known and used in the art. For example, the various parts of the club head structure 102, such as the face member 102a, the ball striking plate 102b, the crown 102c, the sole 102d, and/or the body portion(s) 102e may be joined and/or fixed together (directly or indirectly through intermediate members) by adhesives, cements, welding, soldering, or other bonding or fusing techniques; by mechanical connectors (such as threads, screws, nuts, bolts, or other connectors); and the like. If desired, the mating edges of various parts of the club head structure 102 (e.g., the edges where members 102a, 102b, 102c, 102d, and/or 102e contact and join to one another) may include one or more raised ribs, tabs, ledges, or other engagement elements that fit into or onto corresponding grooves, slots, surfaces, ledges, openings, or other structures provided in or on the facing side edge to which it is joined. Cements, adhesives, mechanical connectors, finishing material, or the like may be used in combination with the raised rib/groove/ledge/edge or other connecting structures described above to further help secure the various parts of the club head structure 102 together.
FIGS. 2A through 2C illustrate additional example features and structures that may be included in golf club 100 and golf club head 102 structures in accordance with this invention. As shown in these figures, the rear portion 102e of this club head structure 102 includes an opening 210 to the interior cavity of the hollow club head 102 structure. In certain embodiments, the opening 210 may extend into a portion of the crown 102c and/or a portion of the sole 102d and/or the opening 210 may extend into the heel and/or toe portions of the club head structure 102. The opening 210 may be of any desired shape and or size, e.g., depending upon the desired characteristics of the club head 102 structure and placement of the rear body member (which will be described in more detail below); the size, dimensions and shape of the opening(s) may not necessarily be defined by the size, dimensions or shape of the cavity. For example, in some embodiments, the opening(s) may extend at least 10% of the perimeter of the length of the cavity, at least 25% of the perimeter of the length of the cavity, at least 50% of the perimeter of the length of the cavity, or even 100% of the perimeter of the length of the cavity. Similarly, in some embodiments, the opening(s) may extend at least 10% of the perimeter of the width of the cavity, at least 25% of the perimeter of the width of the cavity, at least 50% of the perimeter of the width of the cavity, or even 100% of the perimeter of the width of the cavity.
While FIGS. 2A through 2C illustrate the opening to the interior cavity of the club head in the center of club head 102 rear portion 102e, if desired, the opening to the interior cavity may be offset, e.g., located more toward the heel side or the toe side, and/or plural openings (e.g., one in the heel area and one in the toe area) to the interior cavity may be provided on a club head 102 structure without departing from this invention. The opening to the interior cavity also may be angled along the rear face 102e (e.g., in a direction from the front heel toward the rear toe, in a direction from the front toe toward the rear heel, etc.) without departing from this invention.
As illustrated in FIG. 3B, the rear body member 310 may optionally include more than one part or portion. The embodiment depicted shows a rear body member 310 that has two separate portions 310a, 310b, but any number of portions may be used without departing from the scope of this invention. As previously stated, the opening to the cavity in which the rear body members 310a, 310b are mounted may also be made up of a plurality of openings. Although some embodiments may have a one-to-one correlation of the number openings to the number of rear body member 310 portions, other embodiments may have fewer openings than rear body member 310 portions, while still other embodiments may have fewer rear body member 310 portions than openings. For example, in FIG. 3B, the opening to the cavity may comprise a single opening (separated into three portions by two support beams 230) while receiving a rear body member 310 comprising two separate portions (that optionally at least partially overlap one another, e.g., at the rear center of the club head). The ability to use varying numbers of openings and rear body member parts is advantageous in the flexibility provided for distributing weight differently according to desired golf club 100 characteristics.
Distributing weight at different places by using a rear body member 310 may allow users or club fitters to affect the flight of balls propelled using club heads 102 and golf clubs 100 in accordance with these examples of the invention. For example, it is typically easier for at least some users to get a golf ball airborne using a club head 102 having significant weight located lower and toward its rear (e.g., a rear body member 310 with the majority of its weight extending beyond the back of the club head 102 and toward the sole 102d). Such weight positioning also may be used to provide a higher, more lofted golf ball flight path, at least for some users. Under some play conditions and/or for some swing types, however, this higher flight bias and/or ball flight path may not be desirable. For example, to produce lower, more boring ball flights, e.g., for play in windy conditions, or for swing flaws that typically produce an excessively high, ballooning ball flight, a rear body member 310 may include a portion that extends into the interior cavity of the club head 102, such that more weight is positioned forward, toward the ball striking face.
The slot, groove, or opening 334 may take on any desired size or shape, and it may be provided at any desired position or location in the club head structure (e.g., in the sole 102d, in the crown 102c, in the rear face 102e, in the rear body member 310, etc.) without departing from this invention. Also, if desired, the club head 102 structure, including any individual part thereof (e.g., the rear body member 310, the sole 102d, etc.), may include more than one slot, groove, or opening 334 for receiving weight members 346. Also, any number of separate and individual weight members 346 may be mounted in the various slots, grooves, or openings 334 without departing from this invention (e.g., one slot, groove, or opening 334 may include any desired number of weight members 346, including zero, one, two, or more). In the example structure illustrated in FIG. 3A, the rear body member 310 includes a single slot, groove, or opening 334 that extends across a portion of the width of the rear body member 310. In the example structure illustrated in FIG. 3C, the rear body member 310 includes two vertically arranged openings 334. Additionally or alternatively, a similar slot, groove, or opening 334 may be provided at different locations in the rear body member 310 or elsewhere in the remainder of the club head 102 structure. As yet another alternative, if desired, some portion of the club head (e.g., the sole 102d, the rear face 102e, etc.) may include one or more weight ports in which one or more removable weight members 346 may be mounted (optionally, in a tight fitting or non-slidable manner). Such constructions enable users (or club fitters) to provide additional weight in different portion(s) of an overall club head 102 structure, which can be useful to provide a draw biased club, a fade biased club, and/or a club that helps compensate for swing flaws that typically produce an excessively fading or slicing ball flight or a drawing or hooking ball flight.
The weight cartridge member 342 may be secured with the rear body member 310 at any desired time in the club head manufacturing process without departing from this invention. In some embodiments, the weight cartridge member 342 is attached to the rear body member 310 before the rear body member 310 is attached to the remainder of the golf club head 102 structure. Other construction techniques are possible, such as attachment of the weight cartridge member 342 to the rear body member 310 after the rear body member 310 is engaged with the remainder of the club head 102 structure. Also, if desired, the weight cartridge member 342 need not be secured only to the rear body member 310. Also, the weight cartridge member 342 may be provided in other portions of the club head 102 structure, such as in the crown 102c and/or the sole 102d, and optionally not in the rear body member 310, without departing from this invention. Any number of weight cartridge members 342, at any desired locations in an overall club head 102 structure, may be used without departing from this invention.
With further reference to FIG. 3B, as discussed above, the rear body member may include more than one portion, e.g., first portion 310a and second portion 310b. In some arrangements, the rear body member 310 may include more than two portions, as will be discussed more fully below. The first rear body portion 310a and second rear body portion 310b shown in FIG. 3B may be formed of the same or similar materials or may be formed of different materials. The first rear body portion 310a and the second rear body portion 310b may also be formed having different weight, density, etc. characteristics. For instance, one of the first rear body portion 310a and the second rear body portion 310b may be heavier, more dense, have a different weight distribution, have a different size, have a different shape, etc. than the other.
In some arrangements, the materials, weight characteristics, etc. of the rear body member portions may be determined and/or selected based on desired performance characteristics of the golf club head. FIG. 4A illustrates a top view of one arrangement of a golf club head 402 having a multi-part interchangeable rear body member 410. In some examples, the first rear body portion 410a and the second rear body portion 410b may have equal or substantially equal weight and/or density characteristics. In other examples, the first rear body portion 410a may be positioned near a toe end 403 of the golf club head 402 and may be heavier or denser than the second rear body portion 410b positioned near the heel end 405 of the golf club head 402. This additional weight near a toe end 403 of the golf club head 402 may increase the distance from the hosel to the center of gravity of the golf club head body. Because the center of gravity is further away from the hosel, the golfer may not be able to rotate the golf club head body as quickly or easily (e.g., from an open club face position to a closed club face position). Therefore, the stability of the golf shot may be increased. Hence, such a configuration can aid a golfer in imparting “fade” trajectory to the golf ball. A “fade” is a golf shot in which, for example, for a right handed golfer, the golf ball will have “left to right” trajectory. The ball flight for a “fade” tends to have more back spin and, therefore, the ball tends to roll less once it lands. Also, “fades” tend to exhibit higher ball flights. These aspects of a “fade” (i.e., more back spin, less roll and higher ball flight) tend to stop the ball from rolling. Such a club head construction can also help compensate for swing flaws of golfers that tend to hook the ball.
Alternatively, the second rear body portion 410b may be heavier or more dense than the first rear body portion 410a to alter the performance characteristics of the golf club head 402 (i.e., affect the flight path of a ball struck with the golf club). In order to adjust the weight associated with each rear body portion 410a, 410b, the rear body parts 410a, 410b may be formed of different materials. For instance, one or more of the rear body parts 410a, 410b may be formed of a composite material, such as carbon fiber composite. In other arrangements, one or more of the rear body parts 410a, 410b may be formed of a polymer material. In still other examples, one or more of the rear body parts 410a, 410b may be formed of a polymer material and may include a powder material that may be heavier than the polymer to add additional weight to one or more rear body parts 410a, 410b. For instance, the polymer may be loaded with tungsten-containing powder or flakes to add additional weight to the rear body portion 410a, 410b. Other materials may be used to add additional weight to one or more rear body parts 410a, 410b, such as any other metallic material, including steel, lead, or any other material with a density higher than the base material (e.g., base polymer material). This loading of the polymer with a heavier material powder may be used in conjunction with an additional weight member, such as weight member 346 in FIG. 3C, or in place of an additional weight member to distribute or add additional weight to the one or more rear body parts 410a, 410b. Thus, it is understood that the rear body parts 410, 410b shown in FIG. 4 may be configured to accept an additional weight member such as weight member 346 in FIG. 3C. It is further understood that the respective features described in relation to other embodiments herein can be combined with other embodiments as desired.
In at least some examples, the rear body parts 410a, 410b may be formed using known molding techniques, such as injection molding, two shot molding, etc. to result in point-loading of the weight member, e.g., a weight formed in a particular area of one or more rear body parts 410a, 410b. For instance, FIG. 4A shows an additional weighted portion 450 within rear body portion 410b. In some examples, both (or all) rear body parts 410a, 410b may include an additional embedded or integrally formed weighted portion, while in other examples, the rear body parts 410a, 410b need not include any additional weighted portions, such as portion 450. In some arrangements, the additional weighted portion 450 may have a density between 1 g/cc and 11 g/cc. However, other density ranges are possible without departing from the invention. For instance, in one example arrangement, the rear body portion 410a may have a density of approximately 1 g/cc, while the additional weighted portion 450 may have a density of approximately 11 g/cc. In still other examples, one or more rear body parts 410a, 410b may be formed using a rapid prototyping additive fabrication technique, such as laser sintering, stereolithography, and the like.
Rear body parts 410a, 410b may be formed such that they are interchangeable within the golf club head 402. That is, rear body portion 410a may be replaced at the toe end 403 of the club head 402 with rear body portion 410b from the heel end 405, and vice versa. As such, the shape of the rear body parts 410a, 410b and respective connecting structures to the golf club head 402 can be configured wherein the rear body parts 410a,410b are not required to be rotated about an axis to be interchangeable between the toe end 403 and heel end 405 or so that the portions 410a,410b are required to be rotated in order to fit within the opening at the rear portion. In still other examples, additional rear body parts of varying weight, density, size, shape, weight distribution, etc. characteristics may be provided and may be interchanged with rear body parts 410a and 410b as desired (e.g., provided as part of a “kit” or as separately marketed items available to the consumer). In some examples, the rear body parts 410a, 410b may be between 8 and 75 grams each. However, other ranges are possible without departing from the invention. The rear body parts 410a, 410b may be connected to the golf club head 402 using various methods of connection, such as mechanical fasteners, as described in more detail above.
Similar to the arrangements discussed above, the golf club head 402 may define an interior cavity 411. The golf club head 402 may further include one or more openings 460 to the interior cavity 411 to which the rear body member 410 may be connected. As discussed above, the one or more openings 460 may include various connecting portions or support beams to which one or more rear body parts 410a, 410b may be connected. FIG. 4B illustrates a rear view of the golf club head 402 clearly showing the opening 460, interior cavity 411 and associated support beams 430a, 430b, 430c. Although three support beams are shown, more or fewer support beams may be provided without departing from the invention. The support beams 430a, 430b, 430c may include an aperture 428 through which a screw 424 or other fastener may extend to connect the rear body parts 410a, 410b to the golf club head 402. In some arrangements, one or more of the support beams, such as central support beam 430b, may include a plurality of apertures 428 that may provide adjustability in the positioning of rear body parts 410a, 410b. For instance, one rear body portion may be in an “off center” arrangement, such that the rear body parts 410a, 410b are not positioned symmetrically about the golf club head 402. This arrangement may provide additional adjustment in the weight distribution associated with the golf club head 402 and rear body parts 410a, 410b.
FIG. 4C is a perspective view of one arrangement of rear body parts 410a, 410b connecting to the golf club head 402. Similar to the arrangement described above with respect to FIG. 3B, screws 424 or other fasteners may be used to connect the rear body parts 410a, 410b to the golf club head 402. A plurality of apertures 425 may be formed in the rear body parts 410a, 410b and aligned with apertures 428 in support beams 430 to facilitate connection of the rear body parts 410a, 410b to the golf club head 402. In some arrangements, a portion of the rear body parts 410a, 410b may be received into the opening 410 or interior cavity 411 of the golf club head 402 in order to aid in positioning and connecting the rear body parts 410a, 410b to the golf club head 402. In some examples, the rear body parts 410a, 410b may extend into the club head interior cavity by ½ inch to 1 inch.
In some examples, different regions of each rear body portion 410a, 410b may be heavier than other regions. For instance, the first rear body portion 410a may be positioned near a toe edge or end 403 of the golf club head 402 and an end of the first rear body portion 410a most proximal the toe edge or end 403 of the golf club head 402 may be heavier or denser than an end of the first rear body portion 410a most distal the toe end 403 of the golf club head 402. Additionally or alternatively, the second rear body portion 410b may have an end most proximal the heel region or end 405 of the golf club head 402 that is heavier or denser than an end of the second rear body portion 410b most distal the heel region or end 405 of the golf club head 402. Other weighted region arrangements are possible. This positioning of additional weight, or distribution of the weight associated with the rear body parts 410a, 410b, to a rear edge of the golf club head 402 near a toe end 403 and a heel end 405 may aid in stabilizing the golf club head 402 to produce straighter, more stable shots.
FIGS. 5A through 5C illustrate one example golf club head 502 that includes a rear body member 510 having three rear body parts 510a-510c. Although three rear body parts are shown, more or fewer rear body parts may be used without departing from the invention. The rear body parts 510a-510c permit additional flexibility in the distribution of weight associated with the golf club head 502. For example, in one arrangement, a user may have a first rear body portion 510a near a toe region 503 of the golf club head 502, a second rear body portion 510b near a heel region 505 of the golf club head 502, and a third rear body portion 510c positioned near a center of the rear of the golf club head 502 (i.e., between first rear body portion 510a and second rear body portion 510b). In some examples, the first rear body member 510a and second rear body member 510b may be of equal or substantially equal weight while the third rear body member is of a different weight that may be less than the weight of the first and second rear body parts 510a, 510b. This arrangement may aid in distributing weight associated with the rear body parts to the rear corners of the golf club head to provide improved golf club performance.
In other arrangements, the first and second rear body parts 510a, 510b may be of equal or substantially equal weight which may be less than the weight associated with the third rear body portion 510c in order to concentrate a portion of the weight in a central portion of the rear of the golf club head 502. In still other arrangements, the three rear body parts 510a-510c may each be of different weights and/or weight distributions. Other examples may include the first rear body portion 510a and third rear body portion 510b each having a weight or density greater than the second rear body portion 510b in order to distribute a greater portion of the weight associated with the rear body member 510 near a toe end 503 of the golf club head 502.
Various other weight, weight distribution, density, size, shape, and other characteristics of the rear body parts 510a-510c may be used in conjunction with the arrangements describes herein without departing from the invention. Additionally or alternatively, the size or length of the rear body parts 510a-510c may vary. For instance, the length of the third rear body portion 510c may be longer or shorter than illustrated in FIG. 5A-5C. Accordingly, the length and/or size of the first rear body portion 510a and second rear body portion 510b may be longer or shorter to accommodate the different size of the third rear body portion 510c. In other arrangements, only one of the first rear body portion 510a and second rear body portion 510b may be adjusted for size in order to provide an off-center or asymmetric rear body member arrangement. For instance, the first rear body member 510a may be similar to the size shown in FIGS. 5A-5C, the third rear body member 510c may be longer than illustrated and may be positioned to extend beyond a center of the rear of the golf club head 502. The second rear body portion 510b may then be shorter than illustrated in order to accommodate the increased size or length of the third rear body portion 510c. These are just a few examples of some size variation arrangements. Various other size, length, etc. combinations, adjustments, and the like may be considered without departing from the invention.
Similar to the arrangements discussed above, golf club head 502 may further include one or more openings 560 to an interior cavity 511 defined by the golf club head 502. The one or more openings 560 may include one or more connecting portions or support beams to which one or more of rear body parts 510a-510c may be connected. FIG. 5B illustrates a rear view of the golf club head 502 depicting the one or more openings 560, interior cavity 511 and associated support beams. Although three support beams 530a, 530b, 530c are shown, more or fewer support beams may be provided without departing from the invention. The support beams 530a, 530b, 530c may include an aperture 528 through which a screw 524 or other fastener may extend to connect the rear body parts 510a-510c to the golf club head 502. In some arrangements, one or more support beam 530a, 530b, 530c may include a plurality of apertures 528 to provide additional adjustability in the position of the rear body parts 510a-510c. For instance, central support beam 530b may include a plurality of apertures to which the third rear body portion 510c may connect. The plurality of apertures may aid in permitting the third rear body portion 510c to be positioned in a center of the rear of the golf club head 502 or off center, as desired. This may provide additional weight to toe end or heel end of the golf club head 502 in order to provide varying performance characteristics.
FIG. 5C is a perspective view of one arrangement of rear body parts 510a-510c connecting to the golf club head 502. Similar to the arrangement described above with respect to FIG. 3B, screws 524 or other fasteners may be used to connect the rear body parts 510a-510b to the golf club head 502. A plurality of apertures 525 may be formed in the rear body parts 510a-510c and aligned with apertures 528 in support beams 530a, 530b, 530c to facilitate connection of the rear body parts 510a-510c to the golf club head 502. The plurality of apertures shown in support beams 530a, 530b, 530c permit alignment of apertures 525 with various apertures 528 in the support beams 530 in order to adjust the position of one or more rear body parts 510a-510c. In some arrangements, a portion of the rear body parts 510a-510c may be received into the opening 560 or interior cavity 511 of the golf club head 502 in order to aid in positioning and connecting the rear body parts 510a-510c to the golf club head 502.
FIG. 6 illustrates another example golf club head that includes two rear body parts 610a, 610b. The golf club head 602 is similar to the golf club head 102 shown in FIG. 3B. The interior of the golf club head 602 is not exposed and instead a solid portion or wall 640 is shown. The wall 640 may prevent dirt, debris, etc. from accessing the interior of the golf club head 602. In addition, the wall 640 may include one or more apertures or other structures 632 configured to aid in connecting the rear body parts 610a, 610b to the golf club head. For instance, the apertures 632 may align with one or more apertures 638 in the rear body parts 610a, 610b through which a screw, bolt or other fastener, such as fastener 624 may extend to connect the rear body parts 610a, 610b to the golf club head 602. In other examples, more or fewer apertures may be provided to connect the rear body parts 610a, 610b to the golf club head 602. In still other examples, other means of fastening the rear body parts 610a, 610b to the golf club head 602 may be used, such as adhesives, snap fits, and the like.
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Patent Publication Number: 20150182821
Inventors: Andrew G. v. Oldknow (Beaverton, OR), Robert M. Boyd (Flower Mound, TX), John T. Stites (Sallisaw, OK)
Application Number: 14/643,637
Current U.S. Class: Wood Composition (473/343)
International Classification: A63B 53/04 (20150101); A63B 53/06 (20150101); A63B 60/02 (20150101);