Patents Assigned to Knijpstra Konstruktie B.V.
  • Patent number: 6022276
    Abstract: The present invention relates to a carousel with an upper rotating beam (2) arranged on a central mast (1). Carrier rods (3) carrying gondolas or seat carriers (4) are arranged in the circumference of the rotating beam, which may be swiveled outwards and inwards. According to the invention the carrier rods can by inducement of force be swiveled outwards and inwards at angles to the radial or circumferential direction of the rotating beam, which, particularly with the alternate swiveling of successive carrier rods (3) on the rotation, reduces the entire floor space for the carousel and increases the passenger frequency.
    Type: Grant
    Filed: September 24, 1998
    Date of Patent: February 8, 2000
    Assignee: Knijpstra Konstruktie B.V.
    Inventor: Hette Knijpstra
  • Patent number: 5558581
    Abstract: A fairground device has a base disc driven for rotation about a central axis, seat supports carried by the base disc in a spaced relation relative to the central axis for rotation of the seat supports about a second axis, and seats mounted eccentrically relative to a corresponding second axis. In the improvement, the seats are mounted on the seat supports for rotation about a third axis extending substantially transversely to the second axis. The base disc has a plurality of longitudinally extending radial arms pivotally connected to a central hub for pivoting the radial arms about an axis extending transversely to the longitudinally extending radial arms and for carrying the seat supports. A positioning device sets the pivotable position of the radial arms.
    Type: Grant
    Filed: January 25, 1995
    Date of Patent: September 24, 1996
    Assignee: Knijpstra Konstruktie B.V.
    Inventor: Hette Knijpstra
  • Patent number: 5395290
    Abstract: A fairground device having a plurality of seats, a base disc driven for rotation about a central axis and at least one seat support mounted in spaced relation relative to the central axis for rotation about a second axis. Each of the seat supports carry at least one seat mounted eccentrically relative to the corresponding second axis. The seats are mounted on the seat supports for rotation about at least one, third axis which extends substantially transversely to the second axis.
    Type: Grant
    Filed: August 23, 1993
    Date of Patent: March 7, 1995
    Assignee: Knijpstra Konstruktie B.V.
    Inventor: Hette Knijpstra
  • Patent number: 4988089
    Abstract: A fairground attraction transportable in parts, comprising two or more parts transportable in folded condition on separate carriages or containers. The carriages are provided with means for lateral and longitudinal displacement.
    Type: Grant
    Filed: October 17, 1989
    Date of Patent: January 29, 1991
    Assignee: Knijpstra Konstruktie B.V.
    Inventor: Hette Knijpstra
  • Patent number: 4807869
    Abstract: An amusement device comprising two supporting columns with a carrier arm mounted on each column by means of a horizontal rotation shaft so as to be drivable for rotation thereon. The two carrier arms are rotatable in substantially parallel planes, each carrier arm extending on either side of the associated rotation shaft, with a counterweight mounted on the one end and a three-dimensional rotation joint mounted on the other end for attachment to one end of the gondola. The arrangement is such that the gondola is carried on each end by a separate carrier arm. The device is characterized by a joint mounted in at least one of the two carrier arms in such a manner that the gondola-carrying arm portion swivels about a shaft perpendicular to the longitudinal direction of the rotation shaft.
    Type: Grant
    Filed: January 27, 1987
    Date of Patent: February 28, 1989
    Assignee: Knijpstra Konstruktie B. V.
    Inventor: Hette Knijpstra
  • Patent number: 4735545
    Abstract: A boat cradle for supporting boats, comprising a frame supported on legs and carrying support arms of adjustable length that extend upwards from said frame. According to the invention, the frame is supported on three leg structures.
    Type: Grant
    Filed: August 4, 1986
    Date of Patent: April 5, 1988
    Assignee: Knijpstra Konstruktie B.V.
    Inventor: Hette Knijpstra