Patents by Inventor Ludger Helmes

Ludger Helmes 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: 5867862
    Abstract: A vacuum cleaning appliance operated by an electric motor and having a telescopic handle with a hand grip. For greater ease of use, the hand grip is detachable and capable of being attached between a telescopic middle piece and an anchoring point on the handle to the appliance.
    Type: Grant
    Filed: May 1, 1996
    Date of Patent: February 9, 1999
    Assignee: Vorwerk & Co. Interholding GmbH
    Inventors: Heinz Jurgen Ahlf, Ludger Helmes, Rolf Strohmeyer
  • Patent number: 5766283
    Abstract: The invention pertains to a filter bag (8) for a vacuum cleaner (1), with a retainer plate (16) made of a cardboard-paper material that can be attached to a dust bag (37), for example by gluing, and that has a sealable opening (19) for a suction tube (vacuum connector (18)) of a vacuum cleaner (1), where the opening (19) can be closed off with a separate closure piece (V) which can be moved from an open position to a closure position, being slid between two tiers (38, 40). For greater ease of handling the invention proposes that the closure piece (V) be practically fully enclosed in an outer contour of the retainer plate (16) in the open position and in the closure position and that the closure piece (V) lie exposed in a recess (57) of the uppermost tier (38) separate from the opening (19), the longitudinal extension of the recess (57) conforming to the closure piece (V).
    Type: Grant
    Filed: August 6, 1996
    Date of Patent: June 16, 1998
    Assignee: Vorwerk & Co. Interholding GmbH
    Inventors: Germann Bumb, Stephan Peter Dieudonne, Ludger Helmes, Stefan Kraut-Reinkober, Ralf Sauer, Bastiaan Schultink
  • Patent number: 5468271
    Abstract: A dust filter bag for a vacuum cleaner, having a holding plate (1) of a cardboard paper material, which holding plate (1) has a sealing-closable opening (9) for a suction pipe of a vacuum cleaner, the opening (9) being adapted to be closed from the outside by a separate closure tab (10) which has an insertion region, and, in order to obtain an improved dust filter bag, the cardboard-paper material is developed in three layers (layers a, b, c) in the region of the opening (9) and in at least two layers in the remaining region of the holding plate (1), a rubber gasket (11) being gripped between two layers, preferably the second and third layers (b, c).
    Type: Grant
    Filed: October 27, 1993
    Date of Patent: November 21, 1995
    Assignee: Vorwerk & Co. Interholding GmbH
    Inventors: Ralf Sauer, Stefan Kraut-Reinkober, Ludger Helmes, Werner Hoyer
  • Patent number: 4888850
    Abstract: A vacuum cleaner nozzle arrangement has a nozzle defining a suction channel arranged across the width of the nozzle with suction edges surrounding the channel. The nozzle is connected to a connecting wand via a conduit segment disposed therebetween and a vacuum cleaner can be attached to the connecting wand. The nozzle is suspended from the nozzle housing by means of a so-called parallel crank drive. The nozzle housing is configured to be driven or pushed upon a surface to be cleaned.
    Type: Grant
    Filed: May 29, 1987
    Date of Patent: December 26, 1989
    Assignee: Vorwerk & Co. Interholding GmbH
    Inventors: Ludger Helmes, Paul Lienenluke
  • Patent number: 4610340
    Abstract: An overload safety for clutches of the type having driven and drive elements arranged concentrically to each other and having a driver body which cooperates with a spring and is provided in the space between the elements. In order to obtain a small structural form which is simple to manufacture while of dependable operation, the disengaged position is obtained by the bending out of a resiliency section which crosses the space between the elements.
    Type: Grant
    Filed: October 31, 1983
    Date of Patent: September 9, 1986
    Assignee: Vorwerk & Co. Interholding GmbH
    Inventors: Ludger Helmes, Rolf-Jurgen Kramer
  • Patent number: 4532667
    Abstract: The invention is directed to a replaceable brush assembly for a floor cleaning device such as an electric carpet sweeper. The cleaning device is equipped with a so-called central drive. Replaceable brush assemblies are pushed over respective ends of the output shaft. Each brush assembly is equipped with a tubular brush having a ring-shaped cavity disposed in surrounding relationship to a slot formed in the end face of the output shaft. An S-shaped spring has two arms connected to each other by a straight segment which seats in the slot of the shaft when the brush assembly is mounted on the shaft. The arms are resiliently biased against the wall of the ring-shaped cavity.
    Type: Grant
    Filed: July 25, 1984
    Date of Patent: August 6, 1985
    Assignee: Vorwerk & Co. Interholding GmbH
    Inventors: Heinrich Komesker, Ludger Helmes
  • Patent number: 4458378
    Abstract: A vacuum cleaner nozzle has a suction passage with a central suction opening, at least one rear support part arranged rearwardly of the central suction opening with an intermediate passage between the suction passage and the rear support part, a connecting suction member communicating with the suction passage, and at least one front support part arranged forwardly of the suction passage and having a surface area corresponding to that of the central suction opening.
    Type: Grant
    Filed: January 11, 1982
    Date of Patent: July 10, 1984
    Assignee: Vorwerk & Co. Interholding GmbH
    Inventor: Ludger Helmes