US20060068927A1 - System, method and computer program product for estimating club swing condition(s) from ball launch measurements - Google Patents

System, method and computer program product for estimating club swing condition(s) from ball launch measurements Download PDF

Info

Publication number
US20060068927A1
US20060068927A1 US11/217,223 US21722305A US2006068927A1 US 20060068927 A1 US20060068927 A1 US 20060068927A1 US 21722305 A US21722305 A US 21722305A US 2006068927 A1 US2006068927 A1 US 2006068927A1
Authority
US
United States
Prior art keywords
ball
club
momentum
spin
based
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US11/217,223
Inventor
David Rankin
Douglas Winfield
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Accu Sport International Inc
AccuSport International Inc
Original Assignee
Accu Sport International Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to US60625404P priority Critical
Application filed by Accu Sport International Inc filed Critical Accu Sport International Inc
Priority to US11/217,223 priority patent/US20060068927A1/en
Assigned to ACCUSPORT INTERNATIONAL, INC. reassignment ACCUSPORT INTERNATIONAL, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: RANKIN, DAVID B., WINFIELD, DOUGLAS
Publication of US20060068927A1 publication Critical patent/US20060068927A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B24/00Electric or electronic controls for exercising apparatus of preceding groups; Controlling or monitoring of exercises, sportive games, training or athletic performances
    • A63B24/0003Analysing the course of a movement or motion sequences during an exercise or trainings sequence, e.g. swing for golf or tennis
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B24/00Electric or electronic controls for exercising apparatus of preceding groups; Controlling or monitoring of exercises, sportive games, training or athletic performances
    • A63B24/0021Tracking a path or terminating locations
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B69/00Training appliances or apparatus for special sports
    • A63B69/36Training appliances or apparatus for special sports for golf
    • A63B69/3658Means associated with the ball for indicating or measuring, e.g. speed, direction
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B24/00Electric or electronic controls for exercising apparatus of preceding groups; Controlling or monitoring of exercises, sportive games, training or athletic performances
    • A63B24/0021Tracking a path or terminating locations
    • A63B2024/0028Tracking the path of an object, e.g. a ball inside a soccer pitch
    • A63B2024/0031Tracking the path of an object, e.g. a ball inside a soccer pitch at the starting point
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2220/00Measuring of physical parameters relating to sporting activity
    • A63B2220/05Image processing for measuring physical parameters
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2220/00Measuring of physical parameters relating to sporting activity
    • A63B2220/30Speed
    • A63B2220/34Angular speed
    • A63B2220/35Spin
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2220/00Measuring of physical parameters relating to sporting activity
    • A63B2220/80Special sensors, transducers or devices therefor
    • A63B2220/806Video cameras
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B69/00Training appliances or apparatus for special sports
    • A63B69/0002Training appliances or apparatus for special sports for baseball

Abstract

A method, system and computer program product are provided to permit golf swing conditions, such as spin loft, club speed, angle of attack and club path, to be determined without direct measurements of the club swing and, instead, to be based upon the launch conditions of the ball. Initially, a plurality of launch conditions of a ball may be determined, such as by means of a launch monitor. Based upon the launch conditions of the ball, components of momentum 1 PN normal and tangential to the colliding surfaces of the club and the ball may be determined, such as by means of a computing device. At least one club swing parameter may then be determined based upon the normal and tangential components of momentum PN and PT. In this regard, the club swing condition may be spin loft, club speed, angle of attack and/or club path.

Description

    CROSS-REFERENCE TO RELATED APPLICATION(S)
  • The present application claims priority from U.S. Provisional Application No. 60/606,254, filed Sep. 1, 2004 and entitled System and Method for Estimating Club Swing Conditions From Ball Launch Measurements, the contents of which are incorporated herein by reference.
  • FIELD OF THE INVENTION
  • The embodiments of the present invention relate generally to techniques for estimating one or more golf swing conditions and, more particularly, to techniques for estimating one or more of the spin loft, the club speed, the angle of the attack and the club path.
  • BACKGROUND OF THE INVENTION
  • Many golfers work consistently to improve their game. One tool that has been developed to assist golfers in analyzing their golf shots is a golf ball launch monitor. Golf ball launch monitors are used extensively to provide detailed information regarding the velocity of the ball, the launch angle of the ball, the side spin of the ball and the like. As such, golf ball launch monitors are quite useful in training sessions to evidence the manner in which swing changes affect the resulting golf shots. Similarly, launch monitors are quite useful in club fitting to provide feedback on the golf shots hit by a golfer with different clubs such that the golfer can more intelligently select the most suitable set of clubs for their game. Further details regarding launch monitors are provided in the U.S. patent application Ser. No. 10/360,196, filed Feb. 7, 2003, entitled “Methods, Apparatus and Computer Program Products for Processing Images of a Golf Ball”, the contents of which are incorporated herein in their entirety.
  • However, golf ball launch monitors generally only provide information regarding the golf ball following the impact of the club head with the golf ball. Since the swing of the golf club up to and including impact with the golf ball dictates the manner in which the golf ball will be launched, it is also commonly desirable to obtain information regarding the golf swing itself. In this regard, information regarding those golf swings that result in poor golf shots could be analyzed in relation to those golf swings that result in better golf shots in an attempt to identify the characteristics of the golf swing that led to the different results so as to provide feedback on aspects on the golf swing that should be corrected to more consistently hit good shots in the future.
  • Accordingly, it would desirable to provide an apparatus and method that is capable of providing information regarding a golf swing without requiring golfers or golf professionals to purchase additional training equipment. If information regarding the golf swing could be gathered, however, the attributes of the golf swing that lead to good and bad golf shots could be determined in order to provide a golfer with valuable information that identifies those characteristics of their golf swing that need to be monitored in order to consistently produce good golf shots.
  • SUMMARY OF THE INVENTION
  • A method, system and computer program product are provided according to embodiments of the invention which address at least some of the needs and shortcomings identified above. In this regard, the method, system and computer program product may be capable of determining a plurality of launch conditions of a ball, such as by means of a launch monitor. Based upon the launch conditions of the ball, the method, system and computer program product may also be capable of determining, such as by means of a computing device, a component of momentum PN normal to the colliding surfaces of the club and the ball as well as a component of momentum PT tangential to the colliding surfaces of the club and the ball. Further, the method, system and computer program product may be capable of determining at least one club swing parameter based upon the normal and tangential components of momentum PN and PT. In this regard, the club swing condition may be spin loft, club speed, angle of attack and/or club path. As such, in one embodiment, a golf ball launch monitor may be employed to determine a number of launch conditions of a ball and then to process those measured launch conditions to determine one or more club swing conditions. As such, the club swing parameters of one embodiment can be determined in a manner that is independent of any direct measurements of the club swing. Once determined, the club swing conditions may then be utilized by a golfer to determine the impact of various club swing conditions upon the resulting golf shots.
  • In one aspect, the determination of the tangential component of momentum PT may be based upon the radius of the ball, the spin of the ball and the moment of inertia of the ball. Additionally, the determination of the normal component of momentum PN may be based upon the mass of the ball, the velocity of the ball and the tangential component of the momentum PT.
  • According to another aspect, the determination of the spin loft may be based upon the normal and tangential components of momentum PN and PT, the respective masses of the club head and the ball, the radius of the ball, the respective moments of inertia of the ball and the club head, the velocity of the ball and the distance in a tangential direction between the center of gravity of the club head and the location of impact between the club head and the ball. Additionally, the determination of the club speed may be based upon the normal and tangential components of momentum PN and PT, the respective masses of the club head and the ball, and the spin loft.
  • According to a further aspect of the present invention, the determination of the tangential component of momentum PT and the spin loft is based upon the back spin of the ball without consideration of other spin components of the ball. Additionally, the determination of the angle of attack may be based upon the normal and tangential components of momentum PN and PT, the launch angle of the ball and either the loft angle of the club or the spin loft.
  • Still further, the determination of the tangential component of momentum PT and the spin loft may be based upon the side spin of the ball without consideration of other spin components of the ball. In addition, the determination of the club path may be based upon the normal and tangential components of momentum PN and PT, the launch angle of the ball, and the spin loft.
  • Accordingly, methods, systems and computer program products are provided according to the various embodiments of the present invention to permit golf swing conditions, such as spin loft, club speed, angle of attack and club path, to be determined without direct measurements of the club swing and, instead, to be based upon the launch conditions of the ball. As a result, a launch monitor can be utilized to capture the launch conditions of the ball such that the club swing conditions can then be determined. The golfers are accordingly provided meaningful information regarding their club swing conditions that will assist the golfer in improving their game without having to invest in additional training equipment.
  • BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING(S)
  • Having thus described the invention in general terms, reference will now be made to the accompanying drawings, which are not necessarily drawn to scale, and wherein:
  • FIG. 1 is a block diagram of a system according to one embodiment of the present invention;
  • FIG. 2 is a schematic representation of a club head and ball upon impact;
  • FIG. 3 is a schematic representation of the angle of attack of a golf club relative to the launch angle of the golf ball and the vector normal to the face of the golf club; and
  • FIG. 4 is a schematic representation of the angle of attack of a golf club relative to the launch angle of the golf ball and the spin loft of the golf club.
  • DETAILED DESCRIPTION OF THE INVENTION
  • The present inventions now will be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. Indeed, these inventions may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will satisfy applicable legal requirements. Like numbers refer to like elements throughout.
  • A system 10 for estimating for at least one club swing condition according to embodiments of the present invention is shown in FIG. 1. The system typically includes a launch monitor 12 for determining the plurality of launch conditions of a ball. While the system, method and computer program product of the embodiments of the present invention will generally be described hereinafter in conjunction with the swing of the golf club, the system, the method and computer program product of other embodiments in the present invention may be employed in conjunction with other types of balls, such as baseballs, softballs, etc., and in conjunction with other types of clubs, such as baseball and softball bats, etc.
  • In the embodiment in which the launch monitor 12 is monitoring the launch of golf ball, the launch monitor may be of the type generally described by the above referenced U.S. patent application Ser. No. 10/360,193. In this regard, the launch monitor generally includes a sensor 14 positioned, typically in front of or to the side of the golfer, to measure a plurality of initial launch conditions. The initial launch conditions may include initial ball velocity, vertical launch angle, lateral launch angle, dispersion angle, back spin and side spin and potentially a number of other launch parameters. The sensor can advantageously include an image sensor and, more particularly, one or more camera(s) for capturing at least two images of the ball immediately after launch from which the foregoing initial launch conditions can be measured.
  • The system 10 of the illustrated embodiment also includes a computing device 20, such as a processor, a personal computer or the like, that operated under control of a computer program stored in memory 16 as well as any other combination of hardware, such as an electronic circuit, an ASIC or the like, software or firmware, for thereafter estimating at least one club swing condition based upon the launch conditions of the ball. As is shown, this system can also optionally include a display 18 for depicting the launch conditions of the ball and/or the club swing conditions determined therefrom.
  • The computing device 20 generally models the collision between the club head and the ball using the guiding principles relating to the conservation of momentum of rigid bodies. The relevant parameters associated with this modeling process are shown in FIG. 2 in which the impact of the club head 22 with the ball 24 is shown from a top view looking downward onto the club head and ball. As illustrated in FIG. 2, the club has a swing speed VC at the time of impact and impacts the ball at an angle θ, termed the spin loft, which is the angle between the velocity vector and the vector normal to the ball at the impact location. The impact location can be defined relative to the center of gravity of the club head by dN which is the distance component in the normal direction, e.g., in the direction normal to the ball at the impact location, and dT which is the distance component in the tangential direction (the direction tangential to the ball at the impact location). The impact location can also be defined relative to the center of gravity of the ball by the radius RB of the ball.
  • The momentum that is involved in the collision between the club head and the ball has two components. The normal component of momentum PN acts in the direction normal to the colliding surfaces of the clubhead and ball, while the tangential component of momentum PT acts in the direction tangential to the colliding surfaces, as also shown in FIG. 2.
  • As described above, the launch monitor 12 determines a number of launch conditions of the ball and, based upon these launch conditions and principles relating to the conservation of momentum, the computing device 20 determines one or more club swing conditions. In this regard, assuming the club head is not spinning prior to impact and neglecting smaller terms that involve the product of both dN and dT, the normal component of momentum PN can be defined as follows: P N = ( 1 + e ) V C cos θ ( 1 m C + 1 m B + d T 2 I C ) - 1 ( 1 )
    where mC is mass of the club head, mB is mass of the ball, IC is the moment of inertia of the club head in the plane containing PN and PT, and e is the coefficient of restitution which, in turn, is defined as the velocity of separation divided by the velocity of approach of the club head and ball in the normal direction. While mC, mB and IC may be defined in advance and dT can be measured by the launch monitor 12 (or assumed to be equal to 0 for impact locations at or near the sweetspot of the club head), it is noted that a number of the other parameters are club swing conditions or otherwise cannot be directly measured by the launch monitor 12.
  • Assuming there is no relative velocity or sliding in the tangential direction when contact ceases and by making the same assumptions and simplification as in equation (1), the tangential component of momentum PT can be similarly defined as follows: P T = V C sin θ ( 1 m C + 1 m B + R B 2 I B ) - 1 ( 2 )
    where IB is the moment of inertia of the ball. As noted above, while mC, mB, IB and RB may be defined in advance, it is noted that a number of the other parameters are club swing conditions or otherwise cannot be directly measured by the launch monitor.
  • In reality, different ball types have different spin characteristics due to the different material properties and the different types of layered constructions. The foregoing expressions are not intended to model the velocity and spin characteristics of different ball types, but are intended to relate the spin change and velocity change of a given ball for different club head swing speeds and spin lofts.
  • Based upon the normal and tangential components of momentum PN and PT, the post-impact velocity VB of the ball and spin ωB on the ball can then be defined as follows: V B = m B - 1 P N 2 + P T 2 and ω B = I B - 1 ( R B P T ) ( 3 , 4 )
  • It should be noted that the spin ωB represents the total spin and θ represents the total spin loft. The spin ωB can be further defined to be comprised of sidespin ωS and backspin ωBS. Similarly, the total spin loft θ of the ball can be further defined to be comprised of θs representing the effective open and close angle of the face at impact and θL representing the effective loft at impact.
  • Based upon equations (1) and (2), the club speed VC can be defined in terms of the normal and tangential components of momentum as follows: V C = P T ( 1 m C + 1 m B + R B 2 I B ) sin θ = P N ( 1 m C + 1 m B + d T 2 I C ) ( 1 + e ) cos θ ( 5 , 6 )
  • Based upon equations (3) and (4), the normal and tangential components of momentum PN and PT can then be defined as and determined by the computing device 20 as follows: P T = ω B I B R B ( 7 ) P N = ( m B V B ) 2 - P T 2 ( 8 )
  • As will be noted, the computing device 20 can determine the tangential component of momentum PT based upon the measurements of the launch conditions provided by the launch monitor 12 since the launch monitor can measure the spin ωB as well as the parameters which define the moment of inertia of the ball, while the radius of the ball RB is predefined. Once the tangential component of momentum PT has been determined, the computing device can determine the normal component of momentum PN since the velocity of the ball VB is measured by the launch monitor and the mass of the ball mB is predefined.
  • It is also noted that equations (5) and (6) include spin loft θ. The spin loft θ can be defined from the normal and tangential components of momentum defined by equations (1) and (2) as follows: θ = a sin [ P T ( 1 m C + 1 m B + R B 2 I B ) V C ] = a cos [ P N ( 1 m C + 1 m B + d T 2 I C ) V C ( 1 + e ) ] ( 9 , 10 )
  • However, these expressions contain the clubspeed VC and therefore the computing device 20 cannot directly determine the spin loft θ from the launch conditions measured by the launch monitor 12 utilizing equations (9) and (10). However, equations (9) and (10) can be rearranged to arrive at the following equation for spin loft that is independent of the club speed VC: θ = a tan [ ( 1 + e ) P T ( 1 m C + 1 m B + R B 2 I B ) P N ( 1 m C + 1 m B + d T 2 I C ) ] ( 11 )
  • It should be noted that equation (11) includes e which is usually related as a function of club speed. In general terms, e varies in an inverse relationship to club speed such that swings having a faster club speed have an e with a lower value, and vice versa. However, the computing device 20 can employ an approximation for e such that equation (11) no longer has any dependence upon the club speed. In this regard, e may be approximated as a predefined value, such as 0.83. Alternatively, e may be defined as a function of the velocity of the ball VB since the velocity of the ball is almost linearly proportional to the club speed. In any event, equation (11) is not particularly sensitive to the value of e such that an approximation of e still yields accurate values of spin loft. Moreover, as the remainder of the terms of equation (11) can either be measured by the launch monitor (dT) or computed by the computing device from the launch conditions measured by the launch monitor (PT and PN) or are predefined (mC, mB, IC, IBand RB), the computing device can now determine spin loft θ without having to directly measure any club swing parameter. Furthermore, it is noted that since the mass terms mC and mB are both in the numerator and denominator and since RB and IB dominate relative to the mass terms, spin loft θ as defined by equation (11) is not sensitive to the mass terms.
  • After determining the normal and tangential components of momentum PN and PT and the spin loft θ in accordance with equations (7), (8), and (11), respectively, the computing device 20 can determine the club speed VC utilizing equations (5) or (6) above. As will be noted, the computing device can advantageously determine the club speed VC based, directly or indirectly, on measurements of the launch conditions of the ball as obtained by the launch monitor 12 as well as predefined values without any direct measurement of the club swing or club swing parameters. Thus, the system 10, method and computer program product of exemplary embodiments of the present invention can indirectly determine club swing parameters, such as the club speed VC and the loft angle θ, in a manner independent of any direct measurement of the club swing.
  • The angle of attack (AofA) of the club head relative to a ball also provides useful information to the golfer and gives quantifiable information on how his/her swing affects launch conditions. AofA can also be calculated by the computing device 20 from the measured launch conditions, and the predefined loft angle of the clubhead. In this regard, FIG. 3 depicts an exemplary AofA and its relationship to the launch conditions of the ball. It should be noted that FIG. 3 is a side view and shows the club and ball in the vertical plane and that AofA is negative.
  • The face of the club head has a loft angle as shown which is an inherent and predefined property of the club and the normal vector of the club head, that is, the vector normal to the face of the club, at the impact location is shown. The AofA is defined as the orientation of the clubhead relative to the horizontal axis at impact and may be defined as AofA1 as follows:
    AofA 1=Launch Angle+delta−Loft Angle  (12)
    where delta is given by delta = arctan ( P TBS P N ) ( 13 )
  • Unlike the foregoing description of the tangential component of momentum PT which was based upon the total spin ωB of the ball, the tangential component of momentum PTBS utilized in the equations (12) and (13) utilizes only the backspin ωBS of the ball and not the sidespin ωS or other spin components. In other words, the computing device 20 determines the tangential component of momentum PTBS utilizing only the backspin ωBS of the ball as follows: P TBS = ω BS I B R B ( 14 )
  • However, the computing device 20 determines the normal component of momentum PN in the same manner as described above. Thus, the computing device can determine delta based upon launch conditions of the ball that have been measured by the launch monitor 12 as well as predefined values. Once delta has been determined, the computing device can determine AofA, as defined above by equation (12) with the launch angle also being determined by the launch monitor as a launch condition of the ball and the loft angle being a predefined property of the club face. Thus, the system 10, method and computer program product of the foregoing embodiment of the present invention can also determine the angle of attack, another club swing condition, based upon measurements of the launch conditions of the ball and predefined values associated with the ball and the club without any direct measurement of the club swing.
  • Another way to define AofA is to be the angle the swing path makes with the horizontal axis at the time of impact as shown in FIG. 4. As with FIG. 3, the AofA is shown to be negative in FIG. 4 as the AofA extends below the horizontal axis.
  • As indicated by FIG. 4, spin loft is defined as the angle θL in the vertical plane between the swing path and the normal vector, that is, the vector normal to the club face at the impact location. Unlike the definition of spin loft θ described above and set forth in equation (11) which is based upon the total spin COB of the ball, the definition of spin loft θL utilized to determine the AofA is premised upon a tangential component of momentum PTBS that is based only upon the backspin ωBS of the ball and not the sidespin ωS or other spin components. As such, the computing device 20 determines the tangential component of momentum PTBS as set forth by equation (14) above and, in turn, determines the spin loft in the vertical plane θL in accordance with equation (11), albeit utilizing PTBS as opposed to PT.
  • As shown schematically by FIG. 4, the AofA2 may be determined by the computing device 20 as follows:
    AofA 2=Launch Angle+delta−Spin Loft  (15)
    which takes into account the swing path (through the spin loft component) and not just the orientation of the club face to a horizontal axis as In this regard, spin loft θL in the vertical plane and delta can be determined as described above with reference to equation (13) in regards to delta and the launch angle can be measured as a launch condition by the launch monitor 12. As such, the system 10, method and computer program product of the foregoing embodiment of the present invention can also determine AofA2, another club swing condition, based upon measurements of the launch conditions of the ball and predefined values associated with the ball and the club without any direct measurement of the club swing. This expression takes into account the swing path and not just the orientation of the clubface relative to the horizon as in equation (12).
  • Another club swing parameter is club path which is defined as the path of the club head in the horizontal plane prior to impact. The clubpath is usually referred to as being “in to out” or “out to in” meaning that a component of the path traveled by the club head was moving in directions generally away from the golfer and toward the golfer, respectively. The computing device can determine club path in a comparable manner to that described above in conjunction with AofA. In this regard, the club path may be defined as follow:
    Club path=Spin Loft−Launch Angle−delta  (16)
  • Because the club path is in the horizontal plane, the tangential component of momentum PTS utilized to determine delta and the spin loft utilizes only the sidespin ωS of the ball and not the backspin ωBS or other spin components. In other words, the computing device 20 determines the tangential component of momentum PTS utilizing only the sidespin ωS of the ball as follows: P TS = ω S I B R B ( 17 )
  • The computing device 20 then determines delta and spin loft (actually the component of spin loft that defines how open or closed the clubface is at impact) utilizing equations (7) and (11), respectively, albeit with PTS as opposed to PT. Since the launch angle is a launch condition of the ball that has been measured by the launch monitor 12, the computing device can determine the club path in accordance with equation (16). As with the other club swing conditions that have been described above to be determined by the computing device, the system 10, method and computer program product of the foregoing embodiment of the present invention can also determine the club path based upon measurements of the launch conditions of the ball and predefined values associated with the ball and the club without any direct measurement of the club swing.
  • Accordingly, methods, systems and computer program products are provided according to the various embodiments of the present invention to permit golf swing conditions, such as spin loft, club speed, angle of attack and club path, to be determined without direct measurements of the club swing and, instead, to be based upon the launch conditions of the ball. As a result, a launch monitor can be utilized to capture the launch conditions of the ball such that the club swing conditions can then be determined. The golfers are accordingly provided meaningful information regarding their club swing conditions that will assist the golfer in improving their game without having to invest in additional training equipment.
  • Many modifications and other embodiments of the inventions set forth herein will come to mind to one skilled in the art to which these inventions pertain having the benefit of the teachings presented in the foregoing descriptions and the associated drawings. Therefore, it is to be understood that the inventions are not to be limited to the specific embodiments disclosed and that modifications and other embodiments are intended to be included within the scope of the appended claims. Although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims (22)

1. A method of estimating at least one club swing condition comprising:
determining a plurality of launch conditions of a ball;
determining a component of momentum PN normal to colliding surfaces of the club and the ball and a component of momentum PT tangent to the colliding surfaces of the club and the ball based upon the launch conditions of the ball; and
determining at least one club swing condition based upon the normal and tangential components of momentum PN and PT, wherein the at least one club swing condition is selected from the group consisting of spin loft, club speed, angle of attack and club path.
2. A method according to claim 1 wherein determining at least one club swing parameter comprises determining at least one club swing parameter in a manner independent of direct measurements of the club swing.
3. A method according to claim 1 wherein determining the tangential component of momentum PT comprises determining the tangential component of momentum PT based upon a radius of the ball, spin of the ball and a moment of inertia of the ball, and wherein determining the normal component of momentum PN comprises determining the normal component of momentum PN based upon a mass of the ball, a velocity of the ball and the tangential component of momentum PT.
4. A method according to claim 1 wherein determining at least one club swing condition comprises determining spin loft based upon the normal and tangential components of momentum PN and PT, respective masses of the club head and the ball, a radius of the ball, respective moments of inertia of the ball and the club head, a velocity of the ball, and a distance in a tangential direction between a center of gravity of a club head and a location of impact between the club and the ball.
5. A method according to claim 1 wherein determining at least one club swing condition comprises determining club speed based upon the normal and tangential components of momentum PN and PT, respective masses of the club head and the ball and the spin loft.
6. A method according to claim 1 wherein determining the tangential component of momentum PT and the spin loft comprises determining the tangential component of momentum PT and the spin loft based upon backspin of the ball without consideration of other spin components of the ball, and wherein determining at least one club swing condition comprises determining the angle of attack based upon the normal and tangential components of momentum PN and PT, a launch angle of the ball and at least one of a loft angle of the club and the spin loft.
7. A method according to claim 1 wherein determining the tangential component of momentum PT and the spin loft comprises determining the tangential component of momentum PT and the spin loft based upon sidespin of the ball without consideration of other spin components of the ball, and wherein determining at least one club swing condition comprises determining the club path based upon the normal and tangential components of momentum PN and PT, a launch angle of the ball and the spin loft.
8. A system for estimating at least one club swing condition comprising:
a launch monitor capable of determining a plurality of launch conditions of a ball; and
a computing device capable of determining a component of momentum PN normal to colliding surfaces of the club and the ball and a component of momentum PT tangent to the colliding surfaces of the club and the ball based upon the launch conditions of the ball, said computing device being further capable of determining at least one club swing condition based upon the normal and tangential components of momentum PN and PT, wherein the at least one club swing condition is selected from the group consisting of spin loft, club speed, angle of attack and club path.
9. A system according to claim 8 wherein said computing device is capable of determining at least one club swing parameter in a manner independent of direct measurements of the club swing.
10. A system according to claim 8 wherein said computing device is capable of determining the tangential component of momentum PT based upon a radius of the ball, spin of the ball and a moment of inertia of the ball, and wherein said computing device is further capable of determining the normal component of momentum PN based upon a mass of the ball, a velocity of the ball and the tangential component of momentum PT.
11. A system according to claim 8 wherein said computing device is capable of determining spin loft based upon the normal and tangential components of momentum PN and PT, respective masses of the club head and the ball, a radius of the ball, respective moments of inertia of the ball and the club head, a velocity of the ball, and a distance in a tangential direction between a center of gravity of a club head and a location of impact between the club and the ball.
12. A system according to claim 8 wherein said computing device is capable of determining club speed based upon the normal and tangential components of momentum PN and PT, respective masses of the club head and the ball and the spin loft.
13. A system according to claim 8 wherein said computing device is capable of determining the tangential component of momentum PT and the spin loft based upon backspin of the ball without consideration of other spin components of the ball, and wherein said computing device is further capable of determining the angle of attack based upon the normal and tangential components of momentum PN and PT, a launch angle of the ball and at least one of a loft angle of the club and the spin loft.
14. A system according to claim 8 wherein said computing device is capable of determining the tangential component of momentum PT and the spin loft based upon sidespin of the ball without consideration of other spin components of the ball, and wherein said computing device is further capable of determining the club path based upon the normal and tangential components of momentum PN and PT, a launch angle of the ball and the spin loft.
15. A system according to claim 8 wherein said launch monitor comprises said computing device.
16. A computer program product capable of estimating at least one club swing condition, the computer program product comprising a computer readable storage medium having computer readable code embodied in said medium, the computer readable code comprising:
a first executable portion adapted to receive a plurality of launch conditions of a ball;
a second executable portion adapted to determine a component of momentum PN normal to colliding surfaces of the club and the ball and a component of momentum PT tangent to the colliding surfaces of the club and the ball based upon the launch conditions of the ball; and
a third executable portion adapted to determine at least one club swing condition based upon the normal and tangential components of momentum PN and PT, wherein the at least one club swing condition is selected from the group consisting of spin loft, club speed, angle of attack and club path.
17. A computer program product according to claim 16 wherein said third executable portion is further adapted to determine at least one club swing parameter in a manner independent of direct measurements of the club swing.
18. A computer program product according to claim 16 wherein said second executable portion is adapted to determine the tangential component of momentum PT based upon a radius of the ball, spin of the ball and a moment of inertia of the ball, and wherein said third executable portion is further adapted to determine the normal component of momentum PN based upon a mass of the ball, a velocity of the ball and the tangential component of momentum PT.
19. A computer program product according to claim 16 wherein said third executable portion is further adapted to determine spin loft based upon the normal and tangential components of momentum PN and PT, respective masses of the club head and the ball, a radius of the ball, respective moments of inertia of the ball and the club head, a velocity of the ball, and a distance in a tangential direction between a center of gravity of a club head and a location of impact between the club and the ball.
20. A computer program product according to claim 16 wherein said third executable portion is further adapted to determine club speed based upon the normal and tangential components of momentum PN and PT, respective masses of the club head and the ball and the spin loft.
21. A computer program product according to claim 16 wherein said second and third executable portions are further adapted to determine the tangential component of momentum PT and the spin loft based upon backspin of the ball without consideration of other spin components of the ball, and wherein said third executable portion is further adapted to determine the angle of attack based upon the normal and tangential components of momentum PN and PT, a launch angle of the ball and at least one of a loft angle of the club and the spin loft.
22. A computer program product according to claim 16 wherein said second and third executable portions are further adapted to determine the tangential component of momentum PT and the spin loft based upon sidespin of the ball without consideration of other spin components of the ball, and wherein said third executable portion is further adapted to determine the club path based upon the normal and tangential components of momentum PN and PT, a launch angle of the ball and the spin loft.
US11/217,223 2004-09-01 2005-09-01 System, method and computer program product for estimating club swing condition(s) from ball launch measurements Abandoned US20060068927A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US60625404P true 2004-09-01 2004-09-01
US11/217,223 US20060068927A1 (en) 2004-09-01 2005-09-01 System, method and computer program product for estimating club swing condition(s) from ball launch measurements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/217,223 US20060068927A1 (en) 2004-09-01 2005-09-01 System, method and computer program product for estimating club swing condition(s) from ball launch measurements

Publications (1)

Publication Number Publication Date
US20060068927A1 true US20060068927A1 (en) 2006-03-30

Family

ID=35427430

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/217,223 Abandoned US20060068927A1 (en) 2004-09-01 2005-09-01 System, method and computer program product for estimating club swing condition(s) from ball launch measurements

Country Status (2)

Country Link
US (1) US20060068927A1 (en)
WO (1) WO2006028932A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100234125A1 (en) * 2009-03-16 2010-09-16 Steven Aoyama High launch and low spin golf ball and golf club combination
US7946960B2 (en) 2007-02-05 2011-05-24 Smartsports, Inc. System and method for predicting athletic ability
US20130288829A1 (en) * 2012-04-27 2013-10-31 Dunlop Sports Co. Ltd. Fitting method of golf club
US9211439B1 (en) 2010-10-05 2015-12-15 Swingbyte, Inc. Three dimensional golf swing analyzer
US10213645B1 (en) 2011-10-03 2019-02-26 Swingbyte, Inc. Motion attributes recognition system and methods

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070049393A1 (en) * 2005-08-26 2007-03-01 Acushnet Company Method for predicting ball launch conditions

Citations (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4063259A (en) * 1975-10-29 1977-12-13 Acushnet Company Method of matching golfer with golf ball, golf club, or style of play
US4158853A (en) * 1977-09-12 1979-06-19 Acushnet Company Monitoring system for measuring kinematic data of golf balls
US4375887A (en) * 1975-10-29 1983-03-08 Acushnet Company Method of matching golfer with golf ball, golf club, or style of play
US4542906A (en) * 1982-09-02 1985-09-24 Mitsubishi Denki Kabushiki Kaisha Computer aided golf training device
US5471383A (en) * 1992-01-22 1995-11-28 Acushnet Company Monitoring systems to measure and display flight characteristics of moving sports object
US5472205A (en) * 1994-06-20 1995-12-05 Thrustmaster, Inc. Opto-electric golf club swing sensing system and method
US5489099A (en) * 1992-10-30 1996-02-06 Accu-Sport International, Inc. Apparatus and method for tracking the flight of a golf ball
US5501463A (en) * 1992-11-20 1996-03-26 Acushnet Company Method and apparatus to determine object striking instrument movement conditions
US5575719A (en) * 1994-02-24 1996-11-19 Acushnet Company Method and apparatus to determine object striking instrument movement conditions
US5614823A (en) * 1994-04-18 1997-03-25 Sumitomo Rubber Industries, Ltd. Apparatus and method for measuring head speed and opening angle using six sensors arranged in a rectangular format
US6031933A (en) * 1996-04-25 2000-02-29 Bridgestone Sports Co., Ltd. Method and apparatus for inspecting the outer appearance of a golf ball
US6042483A (en) * 1996-10-30 2000-03-28 Bridgestone Sports Co., Ltd. Method of measuring motion of a golf ball
US6226416B1 (en) * 1994-04-18 2001-05-01 Sumitomo Rubber Industries, Ltd. Apparatus and method for measuring rotation quantity of spherical object
US6241622B1 (en) * 1998-09-18 2001-06-05 Acushnet Company Method and apparatus to determine golf ball trajectory and flight
US6286364B1 (en) * 1998-09-18 2001-09-11 Acushnet Company Method and apparatus for measuring aerodynamic characteristics of a golf ball
US6390934B1 (en) * 2001-03-29 2002-05-21 Acushnet Company Method of image processing of paint dots on golf balls
US20020085213A1 (en) * 2000-11-08 2002-07-04 Akio Yamamoto Ball motion measuring apparatus
US20020098897A1 (en) * 2001-01-19 2002-07-25 Callaway Golf Company System and method for measuring a golfer's ball striking parameters
US6458035B1 (en) * 1998-06-30 2002-10-01 Bridgestone Sports Co., Ltd. Method of measuring rotational motion of a golf ball
US20020155896A1 (en) * 2001-02-14 2002-10-24 William Gobush Launch monitor system and a method for use thereof
US6506124B1 (en) * 2001-12-21 2003-01-14 Callaway Golf Company Method for predicting a golfer's ball striking performance
US20050054456A1 (en) * 2003-09-08 2005-03-10 William Gobush Multishutter club-ball analyzer
US20050085311A1 (en) * 2002-01-18 2005-04-21 Voges Mitchell C. Systems and methods for fitting golf equipment
US20050107179A1 (en) * 2003-07-24 2005-05-19 Anees Munshi Projectile-based Sports Simulation Method and Apparatus
US20050227792A1 (en) * 2004-03-18 2005-10-13 Hbl Ltd. Virtual golf training and gaming system and method
US20050233815A1 (en) * 2004-03-18 2005-10-20 Hbl Ltd. Method of determining a flight trajectory and extracting flight data for a trackable golf ball
US20050272514A1 (en) * 2004-06-07 2005-12-08 Laurent Bissonnette Launch monitor
US20050272516A1 (en) * 2004-06-07 2005-12-08 William Gobush Launch monitor
US20050272513A1 (en) * 2004-06-07 2005-12-08 Laurent Bissonnette Launch monitor
US20050272512A1 (en) * 2004-06-07 2005-12-08 Laurent Bissonnette Launch monitor
US20050282645A1 (en) * 2004-06-07 2005-12-22 Laurent Bissonnette Launch monitor
US20060030429A1 (en) * 2004-06-22 2006-02-09 Accu-Sport International, Inc. System, method and computer program product for simulating the flight path of a ball
US20060030341A1 (en) * 2004-08-06 2006-02-09 Avaya Technology Corp. Mobile desk phone
US20060030430A1 (en) * 2004-06-22 2006-02-09 Accu-Sport International, Inc. Method, apparatus and computer program product for automatically analyzing human performance
US20060046861A1 (en) * 2004-08-31 2006-03-02 Lastowka Eric J Infrared sensing launch monitor
US20070167249A1 (en) * 2003-11-26 2007-07-19 Max Out Golf Llc Systems and Methods for Fitting Golf Equipment
US20070213139A1 (en) * 1999-01-29 2007-09-13 Keith Stivers Golf ball flight monitoring system

Patent Citations (47)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4375887A (en) * 1975-10-29 1983-03-08 Acushnet Company Method of matching golfer with golf ball, golf club, or style of play
US4063259A (en) * 1975-10-29 1977-12-13 Acushnet Company Method of matching golfer with golf ball, golf club, or style of play
US4158853A (en) * 1977-09-12 1979-06-19 Acushnet Company Monitoring system for measuring kinematic data of golf balls
US4542906A (en) * 1982-09-02 1985-09-24 Mitsubishi Denki Kabushiki Kaisha Computer aided golf training device
US5471383A (en) * 1992-01-22 1995-11-28 Acushnet Company Monitoring systems to measure and display flight characteristics of moving sports object
US5489099A (en) * 1992-10-30 1996-02-06 Accu-Sport International, Inc. Apparatus and method for tracking the flight of a golf ball
US5501463A (en) * 1992-11-20 1996-03-26 Acushnet Company Method and apparatus to determine object striking instrument movement conditions
US6500073B1 (en) * 1992-11-20 2002-12-31 Acushnet Company Method and apparatus to determine golf ball trajectory and flight
US5575719A (en) * 1994-02-24 1996-11-19 Acushnet Company Method and apparatus to determine object striking instrument movement conditions
US6226416B1 (en) * 1994-04-18 2001-05-01 Sumitomo Rubber Industries, Ltd. Apparatus and method for measuring rotation quantity of spherical object
US5614823A (en) * 1994-04-18 1997-03-25 Sumitomo Rubber Industries, Ltd. Apparatus and method for measuring head speed and opening angle using six sensors arranged in a rectangular format
US5472205A (en) * 1994-06-20 1995-12-05 Thrustmaster, Inc. Opto-electric golf club swing sensing system and method
US6031933A (en) * 1996-04-25 2000-02-29 Bridgestone Sports Co., Ltd. Method and apparatus for inspecting the outer appearance of a golf ball
US6042483A (en) * 1996-10-30 2000-03-28 Bridgestone Sports Co., Ltd. Method of measuring motion of a golf ball
US6458035B1 (en) * 1998-06-30 2002-10-01 Bridgestone Sports Co., Ltd. Method of measuring rotational motion of a golf ball
US6241622B1 (en) * 1998-09-18 2001-06-05 Acushnet Company Method and apparatus to determine golf ball trajectory and flight
US7086955B2 (en) * 1998-09-18 2006-08-08 Acushnet Company Method and apparatus to determine golf ball trajectory and flight
US6488591B1 (en) * 1998-09-18 2002-12-03 Acushnet Company Method and apparatus to determine golf ball trajectory and flight
US6286364B1 (en) * 1998-09-18 2001-09-11 Acushnet Company Method and apparatus for measuring aerodynamic characteristics of a golf ball
US20070213139A1 (en) * 1999-01-29 2007-09-13 Keith Stivers Golf ball flight monitoring system
US20020085213A1 (en) * 2000-11-08 2002-07-04 Akio Yamamoto Ball motion measuring apparatus
US20020098897A1 (en) * 2001-01-19 2002-07-25 Callaway Golf Company System and method for measuring a golfer's ball striking parameters
US6431990B1 (en) * 2001-01-19 2002-08-13 Callaway Golf Company System and method for measuring a golfer's ball striking parameters
US6561917B2 (en) * 2001-01-19 2003-05-13 Callaway Golf Company System and method for measuring a golfer's ball striking parameters
US20020098898A1 (en) * 2001-01-19 2002-07-25 Manwaring Scott R. System and method for measuring a golfer's ball striking parameters
US20020155896A1 (en) * 2001-02-14 2002-10-24 William Gobush Launch monitor system and a method for use thereof
US6390934B1 (en) * 2001-03-29 2002-05-21 Acushnet Company Method of image processing of paint dots on golf balls
US6602144B2 (en) * 2001-12-21 2003-08-05 Callaway Golf Company Method for predicting a golfer's ball striking performance
US6821209B2 (en) * 2001-12-21 2004-11-23 Callaway Golf Company Method for predicting a golfer's ball striking performance
US6506124B1 (en) * 2001-12-21 2003-01-14 Callaway Golf Company Method for predicting a golfer's ball striking performance
US6929558B2 (en) * 2001-12-21 2005-08-16 Callaway Golf Company Method for predicting a golfer's ball striking performance
US20050085311A1 (en) * 2002-01-18 2005-04-21 Voges Mitchell C. Systems and methods for fitting golf equipment
US20050085309A1 (en) * 2002-01-18 2005-04-21 Mcgann Timothy J. Systems and methods for fitting golf equipment
US20050107179A1 (en) * 2003-07-24 2005-05-19 Anees Munshi Projectile-based Sports Simulation Method and Apparatus
US20050054456A1 (en) * 2003-09-08 2005-03-10 William Gobush Multishutter club-ball analyzer
US20070167249A1 (en) * 2003-11-26 2007-07-19 Max Out Golf Llc Systems and Methods for Fitting Golf Equipment
US20050233815A1 (en) * 2004-03-18 2005-10-20 Hbl Ltd. Method of determining a flight trajectory and extracting flight data for a trackable golf ball
US20050227792A1 (en) * 2004-03-18 2005-10-13 Hbl Ltd. Virtual golf training and gaming system and method
US20050272516A1 (en) * 2004-06-07 2005-12-08 William Gobush Launch monitor
US20050282645A1 (en) * 2004-06-07 2005-12-22 Laurent Bissonnette Launch monitor
US20050272512A1 (en) * 2004-06-07 2005-12-08 Laurent Bissonnette Launch monitor
US20050272513A1 (en) * 2004-06-07 2005-12-08 Laurent Bissonnette Launch monitor
US20050272514A1 (en) * 2004-06-07 2005-12-08 Laurent Bissonnette Launch monitor
US20060030430A1 (en) * 2004-06-22 2006-02-09 Accu-Sport International, Inc. Method, apparatus and computer program product for automatically analyzing human performance
US20060030429A1 (en) * 2004-06-22 2006-02-09 Accu-Sport International, Inc. System, method and computer program product for simulating the flight path of a ball
US20060030341A1 (en) * 2004-08-06 2006-02-09 Avaya Technology Corp. Mobile desk phone
US20060046861A1 (en) * 2004-08-31 2006-03-02 Lastowka Eric J Infrared sensing launch monitor

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7946960B2 (en) 2007-02-05 2011-05-24 Smartsports, Inc. System and method for predicting athletic ability
US20110213473A1 (en) * 2007-02-05 2011-09-01 Smartsports, Inc. System and method for predicting athletic ability
US8308615B2 (en) 2007-02-05 2012-11-13 Smartsports, Inc. System and method for predicting athletic ability
US20100234125A1 (en) * 2009-03-16 2010-09-16 Steven Aoyama High launch and low spin golf ball and golf club combination
US9211439B1 (en) 2010-10-05 2015-12-15 Swingbyte, Inc. Three dimensional golf swing analyzer
US10213645B1 (en) 2011-10-03 2019-02-26 Swingbyte, Inc. Motion attributes recognition system and methods
US20130288829A1 (en) * 2012-04-27 2013-10-31 Dunlop Sports Co. Ltd. Fitting method of golf club

Also Published As

Publication number Publication date
WO2006028932A1 (en) 2006-03-16

Similar Documents

Publication Publication Date Title
US8672779B1 (en) System and method for swing analyses
US9415290B2 (en) Golf swing analyzing apparatus and method of analyzing golf swing
US9851374B2 (en) Inertial measurement of sports motion
US9415291B2 (en) Golf swing analyzing apparatus and method of analyzing golf swing
US8998717B2 (en) Device and method for reconstructing and analyzing motion of a rigid body
US20180339208A1 (en) Method For Analyzing The Game Of A User Of A Racket
US8657707B2 (en) Swing analysis method
KR101788208B1 (en) System to provide dynamic customized sports instruction responsive to motion of a mobile device
US8784228B2 (en) Swing measurement golf club with sensors
EP2701811B1 (en) System for golf clubs and golf club heads
US20150198629A1 (en) Motion analyzing apparatus
US9409073B2 (en) Golf clubs and golf club heads
US9403057B2 (en) Swing analyzing device, swing analyzing program, and recording medium
US9731165B2 (en) Swing analyzing apparatus
US10617926B2 (en) Swing analysis method using a swing plane reference frame
US20170021251A1 (en) Using a mobile device with integrated motion sensing for customized golf club fitting
US9914018B2 (en) System, method and apparatus for capturing and training a swing movement of a club
US6648769B2 (en) Instrumented golf club system & method of use
US10092793B1 (en) Trajectory detection and feedback systems for tennis
US6224493B1 (en) Instrumented golf club system and method of use
US8419560B2 (en) System and method for adaptive delivery of game balls based on player-specific performance data analysis
US8109816B1 (en) Method and apparatus for measurement and analysis of a golf swing
US20140378239A1 (en) Motion analysis method and motion analysis device
KR101532206B1 (en) System and operating method for real-time analysis of golf swing motion on golf club
US9375624B2 (en) Golf clubs and golf club heads

Legal Events

Date Code Title Description
AS Assignment

Owner name: ACCUSPORT INTERNATIONAL, INC., NORTH CAROLINA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:RANKIN, DAVID B.;WINFIELD, DOUGLAS;REEL/FRAME:017049/0587

Effective date: 20051118

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION