Patents by Inventor Hette Knijpstra

Hette Knijpstra has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11408233
    Abstract: The invention relates to an assembly (1) for forming a mast for guiding a drill drive in an HDD machine. The assembly comprises a mast body (10) with a generally U-shaped cross-section, a mast cover with a recessed surface (21), a set of two or more racks (30), first connecting means (24) for connecting the racks releasably to the mast cover and second connecting means (44) for connecting the racks releasably to the mast body. The racks together with the mast body and the mast cover in assembled state form a mast with a substantially closed contour.
    Type: Grant
    Filed: July 15, 2019
    Date of Patent: August 9, 2022
    Assignee: Javelin Consultancy and Investment Limited
    Inventor: Hette Knijpstra
  • Publication number: 20220080326
    Abstract: The present invention relates to a support construction (10) for a transportable attraction (100) for amusement rides provided with a base (2), at least two masts (21, 22) that are moveable between a folded and stretched position, and a main shaft (30) that is intended to be supported by the masts in the stretched position of the masts. Each mast comprises a base mast segment, which is hingedly attached to the base, and a top mast segment, which is hingedly connected with the base mast segment and is attachable to the main shaft. The base comprises at least two trailers (11, 12) and trailer coupling means for coupling the trailers. On each of the trailers a base mast segment of one of the masts is mounted. The support construction further comprises first mast coupling means for the coupling of a first pair of masts in folded position. The invention further relates to a method for raising the support construction according to the invention.
    Type: Application
    Filed: September 15, 2021
    Publication date: March 17, 2022
    Inventor: Hette Knijpstra
  • Publication number: 20200024909
    Abstract: The invention relates to an assembly (1) for forming a mast for guiding a drill drive in an HDD machine. The assembly comprises a mast body (10) with a generally U-shaped cross-section, a mast cover with a recessed surface (21), a set of two or more racks (30), first connecting means (24) for connecting the racks releasably to the mast cover and second connecting means (44) for connecting the racks releasably to the mast body. The racks together with the mast body and the mast cover in assembled state form a mast with a substantially closed contour.
    Type: Application
    Filed: July 15, 2019
    Publication date: January 23, 2020
    Inventor: Hette Knijpstra
  • Patent number: 7744476
    Abstract: An embodiment of the present invention relates to a fairground attraction, including an arm which is mounted for rotation about a shaft in a bearing arranged in the top of the frame, on an end of which arm at least one people carrier is suspended, a device for rotatingly driving the arm, and a device for displacing the at least one people carrier in height direction in a rest position of the arm, which displacing device is arranged between the top supporting the bearing and the remaining part of the frame. In one embodiment of the present invention, the top can be pivotable relative to the remaining frame part, for instance about a lying axis which lies transversely of the rotation axis of the arm, and the displacing device can include a drive for causing pivoting of the top. The fairground attraction can further be provided with a device for blocking the displacing device during operation of the fairground attraction.
    Type: Grant
    Filed: November 15, 2005
    Date of Patent: June 29, 2010
    Assignee: K.I.G. Heerenveen B.V.
    Inventor: Hette Knijpstra
  • Publication number: 20080200270
    Abstract: An embodiment of the present invention relates to a fairground attraction, including an arm which is mounted for rotation about a shaft in a bearing arranged in the top of the frame, on an end of which arm at least one people carrier is suspended, a device for rotatingly driving the arm, and a device for displacing the at least one people carrier in height direction in a rest position of the arm, which displacing device is arranged between the top supporting the bearing and the remaining part of the frame. In one embodiment of the present invention, the top can be pivotable relative to the remaining frame part, for instance about a lying axis which lies transversely of the rotation axis of the arm, and the displacing device can include a drive for causing pivoting of the top. The fairground attraction can further be provided with a device for blocking the displacing device during operation of the fairground attraction.
    Type: Application
    Filed: November 15, 2005
    Publication date: August 21, 2008
    Applicant: K.I.G. HEERENVEEN B.V.
    Inventor: Hette Knijpstra
  • Publication number: 20080026858
    Abstract: A fairground attraction with two mutually parallel arms which are each rotatable about an axis lying at an angle to the horizontal and between which a people carrier is suspended is disclosed. The people carrier can herein be pivotable about an axis which connects the arms and be suspended from spacers lying transversely of the ends of the arms. The rotation shaft of the arms can be supported by masts which are connected by a frame. The frame can herein be embodied as a rolling chassis which can be pulled by a vehicle. The arms can be driven rotatingly in mutually synchronous manner, each by its own motor, which motors are coupled in a master-slave connection.
    Type: Application
    Filed: June 7, 2005
    Publication date: January 31, 2008
    Inventor: Hette Knijpstra
  • 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