Measuring and testing – Speed – velocity – or acceleration – With means for retaining reading
Patent
1989-08-23
1990-11-06
Chapman, John
Measuring and testing
Speed, velocity, or acceleration
With means for retaining reading
273 29A, 273186A, G01P 1504
Patent
active
049675966
ABSTRACT:
An apparatus for indicating the peak tangential velocity of a swung sporting goods implement such as a tennis racquet, golf club, or baseball bat, comprises a tube having a longitudinal bore. A seismic mass is slideably disposed within the bore of the tube, and a spring operates to pull the seismic mass toward the proximal end of the tube. A reset mass is normally captured at the distal end of the tube but is selectively released to slide within the bore of the tube. A peak velocity indicator is slideably disposed within the bore of the tube between the seismic mass and the reset mass, the peak velocity indicator frictionally engaging the inner walls of the tube such that it is displaceable longitudinally within the bore of the tube by an applied force but maintains its position within the bore of the tube once the applied force is removed. When the apparatus is affixed to the club or racquet with the longitudinal bore aligned with the shaft of the implement, swinging the implement generates a centrifugal force which displaces the seismic mass. The displaced seismic mass pushes the peak velocity indicator ahead of it, and the peak velocity indicator remains lodged in its forwardmost position of displacement at the completion of the swing. After the position of the peak velocity indicator is observed, the rest mass is released from its position at the distal end of the tube and slides down the tube to return the peak velocity indicator to its ready position.
REFERENCES:
patent: 2543722 (1951-02-01), Hetzel
patent: 3097534 (1963-07-01), Pasieka
patent: 3561272 (1971-02-01), Davis
patent: 3572706 (1971-03-01), Schroder
patent: 4270753 (1981-06-01), Maroth et al.
patent: 4317567 (1982-03-01), Blake
patent: 4363488 (1982-12-01), Maroth et al.
patent: 4614343 (1986-09-01), Radway
patent: 4684133 (1987-08-01), Maroth
Goodwin R. W.
Rilling John F.
Chapman John
GRT, Inc.
LandOfFree
Swing velocity indicator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Swing velocity indicator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Swing velocity indicator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1300078