Patents Assigned to Zimm-Zamm AG
  • Patent number: 4538818
    Abstract: The invention provides a large shuttlecock which can be used with a variety of bats or racquets for a game resembling badminton or a game combining the pleasure of badminton and tennis in that the spherical head portion has a size comparable to a standard tennis ball and is designed to bounce, the shuttlecock having a spherical or partially spherical head portion made from at least an outer layer of closed cell polymeric material of predetermined parameters relating to cell size, density, tensile strength and an elongation at break and having a skirt formation attached to it in association with a core unit which increases the average density of the spherical head portion to a predetermined value.
    Type: Grant
    Filed: June 21, 1983
    Date of Patent: September 3, 1985
    Assignee: Zimm Zamm AG
    Inventor: J. Andrew Sinclair
  • Patent number: 4491329
    Abstract: The invention is concerned with apparatus for a game of tether ball in which a bolt member is mounted on a pole and a ball is attached to a line which is attached at its other end to a nut member rotatable on the bolt member so that the point of attachment is up or down the bolt member according to the direction of travel of the ball after being struck by a bat, an element is being provided inside the bolt portion which is biased for movement in one direction which has a formation adapted releasably to receive a locking formation which is released in one or the other of the winning positions of the game by passage of the nut past such winning positions.
    Type: Grant
    Filed: August 25, 1983
    Date of Patent: January 1, 1985
    Assignee: Zimm Zamm AG
    Inventor: Ole K. Nielsen
  • Bat
    Patent number: D271510
    Type: Grant
    Filed: April 13, 1981
    Date of Patent: November 22, 1983
    Assignee: Zimm-Zamm AG
    Inventor: Ian G. Gormley