Patents by Inventor David M. Ryden

David M. Ryden 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: 5569079
    Abstract: A portable device as disclosed for threshing grain to obtain a sample to be tested, for example, for its moisture content, disease, and protein content. The grain sampling device includes a housing with a handle enabling the device to be carried, an inlet for sampled grain, a chaff outlet and a collection drawer for the threshed grain kernels. Grain entering the inlet first passes through a declustering device consisting of a first group of stationary, transversely disposed pins and a second plurality of transversely disposed pins that are carried on a rotating first gear wheel. The threshing function is performed between a vertically disposed, stationary surface having a layer of resilient, frictional material, and a second gear wheel disposed in substantially parallel, spaced relation to the stationary surface, and which includes a layer of resilient, frictional material in disk form that defines a movable threshing surface.
    Type: Grant
    Filed: March 8, 1995
    Date of Patent: October 29, 1996
    Inventors: David M. Ryden, David W. Ryden, Jr.
  • Patent number: 4543681
    Abstract: A chimney sweeping device is disclosed. The device includes a frame which is mounted on the flue at the top of the chimney. The top section of the frame is enclosed on its three sides and top and has a pair of trap doors hingably mounted on its bottom side. The bottom section of the frame consists of four angle iron legs, at least two of which are hingably mounted to the flue so that the frame may be tipped or tilted away from the top of the flue. A chimney sweeping brush and a weight for pushing the brush down the chimney are provided and are suspended inside the frame via a central pulley mounted at the apex of the top section.
    Type: Grant
    Filed: March 9, 1984
    Date of Patent: October 1, 1985
    Inventor: David M. Ryden