Patents by Inventor Robert Walter Schriever

Robert Walter Schriever 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).

  • Chainsaw and method
    Patent number: 11400530
    Abstract: Herein a chainsaw (1) is disclosed comprising a guide bar (3) and a chain (5) moveably arranged around the guide bar (3). The chainsaw (1) comprises an motor (9) comprising a motor shaft (11), wherein the motor (9) is configured to drive the chain (5) via the motor shaft (11). The chainsaw (1) further comprises a tension estimation arrangement (13) configured to sense a load on the motor shaft (11), and configured to estimate the tension of the chain (5) around the guide bar (3) on the basis of the sensed load on the motor shaft (11). The present disclosure further relates to a method of estimating tension of a chain (5) of a chainsaw (1).
    Type: Grant
    Filed: June 7, 2018
    Date of Patent: August 2, 2022
    Assignee: HUSQVARNA AB
    Inventors: Robert Walter Schriever, E. Arnold Fie, II, Garrett Sherman, Victor Stramenga
  • CHAINSAW AND METHOD
    Publication number: 20200198031
    Abstract: Herein a chainsaw (1) is disclosed comprising a guide bar (3) and a chain (5) moveably arranged around the guide bar (3). The chainsaw (1) comprises an motor (9) comprising a motor shaft (11), wherein the motor (9) is configured to drive the chain (5) via the motor shaft (11). The chainsaw (1) further comprises a tension estimation arrangement (13) configured to sense a load on the motor shaft (11), and configured to estimate the tension of the chain (5) around the guide bar (3) on the basis of the sensed load on the motor shaft (11). The present disclosure further relates to a method of estimating tension of a chain (5) of a chainsaw (1).
    Type: Application
    Filed: June 7, 2018
    Publication date: June 25, 2020
    Inventors: Robert Walter Schriever, E. Arnold Fie, Garrett Sherman, Victor Stramenga