EP 0680368 A1 19951108 - BALL PROPELLING MACHINE.
Title (en)
BALL PROPELLING MACHINE.
Title (de)
BALLWURFMASCHINE.
Title (fr)
MACHINE SERVANT A ENVOYER DES BALLES.
Publication
Application
Priority
- CA 2149297 A 19921113
- GB 9202107 W 19921113
Abstract (en)
[origin: WO9411069A1] A machine which can be used by a player practising a ball game such as tennis or badminton has an ejection mechanism comprising a pair of revolving discs (1a, 1b) spaced apart by a gap (2) through which can be drawn a ball (4) for ejection in a direction (3) which can be determined by appropriate adjustment of the vertical and horizontal positioning of the revolving discs by means of inclination drive (10) and sweep gear (12). Side spin or slice can be imparted to the ball by rotation of the revolving discs about an axis lying in the direction (3) of the ball ejection, whilst top spin or under spin can be imparted to the ball by varying the angular velocity of the discs (1a, 1b) by causing them to rotate at differing speeds. The ejection mechanism may be mounted on a height adjusting mechanism in order to vary the height at which the ball is ejected. The machine can be controlled by a microprocessor-based system which may be pre-programmed or operated by remote control.
IPC 1-7
IPC 8 full level
A63B 69/38 (2006.01); A63B 69/40 (2006.01)
CPC (source: EP)
A63B 69/40 (2013.01); A63B 69/406 (2013.01)
Citation (search report)
See references of WO 9411069A1
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 9411069 A1 19940526; AU 2925992 A 19940608; AU 670549 B2 19960725; CA 2149297 A1 19940526; EP 0680368 A1 19951108; JP H08503390 A 19960416
DOCDB simple family (application)
GB 9202107 W 19921113; AU 2925992 A 19921113; CA 2149297 A 19921113; EP 92923430 A 19921113; JP 51180694 A 19921113