Patents by Inventor George Johannes Van Zijderveld

George Johannes Van Zijderveld 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: 6601696
    Abstract: A bend segment for the track of a chain conveyor comprising at least two spaced, preferably flexible rails (4, 5) forming a track for the carrying surface of chain links (30), permanent magnets arranged below the track of the chain and flexible guide rails (11, 12) for guiding the return part of the chain, a number of supporting elements for supporting the rails being provided, which supporting elements are spaced in the conveying direction of the conveyor, the permanent magnets being accommodated in chambers (24, 24′) formed in an elongate, preferably flexible strip which is also supported on the supporting elements. The invention enables inexpensive manufacture of a bend segment of different lengths and radii.
    Type: Grant
    Filed: May 21, 2001
    Date of Patent: August 5, 2003
    Assignee: MCC Nederland B.V.
    Inventors: George Johannes van Zijderveld, Franciscus Josephus M. van Esch
  • Patent number: 6581758
    Abstract: A conveyor mat comprises a number of plastic modules succeeding each other in a conveying direction and whose top sides form a conveying face and provided with converging hinge loops which have equal basic forms and which alternately extend forwards and rearwards relative to the conveying direction and successive modules are coupled by means of hinge pins, such that the forwardly extending hinge loops of the rearmost module can slide between the rearwardly extending hinge loops of the next module between a slide-out position and a slide-in position, a sidewall of a forwardly extending hinge loop is provided with a projection which in the slide-out position cooperates with the top of the adjacent, rearwardly extending hinge loop, and the sidewall of the adjacent hinge loop is provided with a recess in which the projection can be received during sliding into the slide-in position.
    Type: Grant
    Filed: October 2, 2000
    Date of Patent: June 24, 2003
    Assignee: MCC Nederland
    Inventors: George Johannes van-Zijderveld, Franciscus Josephus Maria van Esch
  • Patent number: 6471049
    Abstract: A conveyor mat built up from hingedly intercoupled plastic modules, each module consisting of a number of substantially equally spaced apart hinge plates extending throughout the length of the module and provided with hinge loops at both ends thereof, the outer hinge plate and a plate-shaped part located on the outer side of a module of at least a number of modules extending to a position below the bottom face of the mat formed by the successive modules or being provided with a recess in the longitudinal direction of the module, the arrangement being such that the thus formed downward extension and/or the recesses form a lateral guide for the conveyor mat and can cooperate with a tubular or U-shaped guide section respectively.
    Type: Grant
    Filed: June 4, 2001
    Date of Patent: October 29, 2002
    Assignee: MCC Nederland B.V.
    Inventors: Franciscus Josephus M. van Esch, George Johannes van Zijderveld
  • Patent number: 6296110
    Abstract: A conveying system, comprising an endless conveyor mat extending between two divert wheels, for conveying products between the divert wheels in a conveying direction. The conveying system further comprises a slide-over device for transferring, adjacent a divert wheel from or towards the conveying face, products conveyed by the conveyor mat towards or from said divert wheel. The slide-over device comprises a number of fingers extending into the conveying face. The conveyor mat comprises a substantially flat conveying face having at least one substantially straight slot, extending in conveying direction. The fingers each cooperate with a slot. Each finger is connected to the slide-over device so as to be detachable substantially in vertical direction.
    Type: Grant
    Filed: January 15, 1999
    Date of Patent: October 2, 2001
    Assignee: MCC Nederland B.V.
    Inventors: George Johannes van Zijderveld, Franciscus Josephus Maria van Esch
  • Patent number: 6227356
    Abstract: A conveyor mat for conveying products in a conveying direction between at least two divert wheels. The conveyor mat comprises a number of rows of side-by-side modules succeeding each other in the conveying direction and extending transversely to the conveying direction. Incorporated into the conveyor mat are a number of guide modules which have their bottom side provided with guide members for cooperation with a guide provided on a conveying track. According to the invention, the guide modules are incorporated into the conveyor mat so as to be substantially equally spaced from one of the lateral edges thereof, such that the guide members together constitute one narrow, slotted guide track extending in conveying direction. In an advantageous manner, the guide modules can be incorporated adjacent a lateral edge of the conveyor mat or in or adjacent the center of the conveyor mat.
    Type: Grant
    Filed: March 15, 1999
    Date of Patent: May 8, 2001
    Assignee: MCC Nederland B.V.
    Inventors: George Johannes Van Zijderveld, Franciscus Josephus Maria Van Esch
  • Patent number: 6196379
    Abstract: A module for a modular conveyor mat is provided with front hinge loops and rear hinge loops and the front hinge loops of one module are adapted to be joined to rear hinge loops of an adjacent module by a hinge pin extending transversely to the conveying direction, a recess in the module accommodates a retaining member having a closing part rotatable between a first position for retaining the hinge pin and a second position for releasing the hinge pin.
    Type: Grant
    Filed: February 16, 1999
    Date of Patent: March 6, 2001
    Assignee: MCC Nederland B.V.
    Inventors: Franciscus Josephus Maria Van Esch, George Johannes Van Zijderveld
  • Patent number: 6085896
    Abstract: Upper part and return part of a bend segment for a chain conveyor provided with a conveyor chain movable over a track with at least one bend zone, which bend segment consists of at least one substantially U-shaped element made of plastic, which element comprises two legs forming the rails which the chain can move over or in, respectively, as well as a connecting portion connecting the legs of the element with each other, and which chain is provided with links each provided with a substantially rectangular bearing surface and a connection system situated under the bearing surface, wherein at least the portion of the legs of the bend segment that forms the guide for the bearing surfaces and connection systems of the chain links is manufactured from a first, high-grade type of plastic material, and the residual portion, if any, of the legs and the connecting portion are manufactured from at least a second, cheaper type of plastic material, for instance a recycled plastic material.
    Type: Grant
    Filed: February 14, 1997
    Date of Patent: July 11, 2000
    Assignee: MCC Nederland B.V.
    Inventor: George Johannes van Zijderveld
  • Patent number: 5816389
    Abstract: A conveyor mat comprising first and second plastic modules built up of hinge plates, the width of the first modules substantially being twice the width of the second modules, the second modules being located only at both sides of the conveyor mat, with always a first module being arranged between two successive second modules at a side, the modules being coupled together by means of hinge pins, and each second module being provided at a side of the conveyor mat with a bearing surface formed integral with the module, which bearing surface extends in the same plane as the conveying plane of the mat, each bearing surface, seen in the conveying direction of the mat, having a length equal to twice the pitch of a module. The bearing surfaces form a dead plate moving along with the mat, for bridging the gap in the transition between two adjoining conveyor mats being at right angles to each other.
    Type: Grant
    Filed: February 19, 1997
    Date of Patent: October 6, 1998
    Assignee: MCC Nederland B.V.
    Inventor: George Johannes van Zijderveld
  • Patent number: 5810686
    Abstract: The invention relates to a divisible sprocket wheel manufactured from synthetic material and having a gear ring (1b) and a hub portion (1a), comprising two wheel halves (1) which are manufactured by means of injection molding and have their axial faces (1f) abutting against each other, and means (3, 4) for enabling fixing the wheel halves together, wherein each wheel half (1) is solid and consists of a first synthetic material forming at least one half of the hub portion of the sprocket wheel; a second synthetic material forming at least one half of the gear ring of the sprocket wheel and the two radial outer faces (1d, 1e) of the wheel half, and a third synthetic material forming the internal portion (1e) of the body of the wheel half.
    Type: Grant
    Filed: July 26, 1996
    Date of Patent: September 22, 1998
    Assignee: MCC Nederland B. V.
    Inventors: Maximus Johanna Franciscus Maria de Jong, George Johannes van Zijderveld
  • Patent number: 5678682
    Abstract: A conveyor chain manufactured from plastic, which is adapted to move at higher speeds than has been conventional heretofore and which is consequently particularly suitable to be used in a conveying system together with a conveyor mat to take over products from this mat or feed them to it. The chain has as a specific property that the front edge and the rear edge of the bearing surface of the chain link are of curved, preferably elliptically-shaped, design in the plane of the bearing surface, that the single hinge eye at the rear edge of the bearing surface has an upper surface which extends in the same plane as the bearing surface and which engages through a convexly shaped end in a correspondingly shaped recess in the bearing surface of the adjacent link coupled thereto through the hinge pin. By these measures the transition of products to and from the chain proceeds extremely smoothly at high speeds too.
    Type: Grant
    Filed: September 8, 1995
    Date of Patent: October 21, 1997
    Assignee: MCC Nederland B.V.
    Inventor: George Johannes van Zijderveld
  • Patent number: RE38543
    Abstract: A conveyor chain manufactured from plastic, which is adapted to move at higher speeds than has been conventional heretofore and which is consequently particularly suitable to be used in a conveying system together with a conveyor mat to take over products from this mat or feed them to it. The chain has as a specific property that the front edge and the rear edge of the bearing surface of the chain link are of curved, preferably elliptically-shaped design in the plane of the bearing surface, that the single hinge eye at the rear edge of the bearing surface has an upper surface which extends in the same plane as the bearing surface and which engages through a convexly shaped end in a correspondingly shaped recess in the bearing surface of the adjacent link coupled thereto through the hinge pin. By these measures the transition of products to and from the chain proceeds extremely smoothly at high speeds too.
    Type: Grant
    Filed: October 22, 1999
    Date of Patent: July 6, 2004
    Assignee: Rexnord FlatTop Europe B.V.
    Inventor: George Johannes van Zijderveld