Patents by Inventor John D. Parkman

John D. Parkman 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).

  • Tobacco sample transfer apparatus and method
    Patent number: 5141005
    Abstract: A method of and an apparatus for automatically taking a cored sample of tobacco from a bale of tobacco and pneumatically transferring the sample to a remotely located receiving station, such as a stem content analyzer, are disclosed. A sample canister with vacuum-operated end closures for use in the pneumatic transfer of the tobacco sample is also disclosed. A compacted, cored sample of tobacco is delaminated and then deposited into an open sample canister which is closed and pneumatically transported to a stem content analyzer where it is opened, upended to deposit the sample into the stem content analyzer, reclosed and pneumatically returned for another sample of tobacco.
    Type: Grant
    Filed: November 13, 1989
    Date of Patent: August 25, 1992
    Assignee: R. J. Reynolds Tobacco Company
    Inventors: Richard M. Henderson, Roger A. Foote, Aubrey L. Swofford, Henry H. Warren, Jr., D. Randall McHone, John D. Parkman, Harvey E. Williams, Jr.