Patents by Inventor John P. Schaffer

John P. Schaffer 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).

  • Publication number: 20110168147
    Abstract: An apparatus is described that is operable between a raised and lowered position for lifting an object without pivot or rotational joints. The apparatus may include an arrow rest for use with an archery bow, wherein the arrow rest has arrow support members operable to form a v-shaped arrow supporting notch, wherein the support members slide in a non-pivotal, non-rotational manner to vary a depth of the v-shaped notch. The support members are oriented to slide between a raised and lowered position. The arrow rest is suitable for coupling to the bow in a manner so that as the bow string is drawn the support members raise the arrow into a shooting position, and when the bow string is released the support members slide away from the arrow to avoid contact between the arrow and support members. Further, the arrow rest is adjustable to accommodate various diameter arrow shafts and to adjust the lateral and vertical orientation of the arrow shaft relative to the riser.
    Type: Application
    Filed: January 10, 2010
    Publication date: July 14, 2011
    Inventor: John P. Schaffer
  • Patent number: 5697355
    Abstract: A compound archery bow has power cable adjusters operable to laterally adjust the power cable to minimize canting of the cam assemblies and adjust the effective length of the power cable to vary the timing of the cam assembly connected to the power cable. Limb pocket assemblies connect the flexible limbs to a riser with a compression clamping force. Opposing side plates are held in compression relation with the limb end with bolts turned down tight into a base supporting the limb end. The compression connection between the limb pocket assembly maintains the limb in a center line alignment with the vertical plane of the bow string and riser.
    Type: Grant
    Filed: December 12, 1994
    Date of Patent: December 16, 1997
    Inventor: John P. Schaffer
  • Patent number: 5331941
    Abstract: A compound archery bow has an overdraw apparatus allowing use of shorter and lighter arrows. The overdraw apparatus has a rearwardly extended bar secured to the midsection of the bow. A cable guard rod is adjustably mounted on the top portion of the bar for laterally locating cable strands relative to the bow cable. An arrow rest adjustably mounted on the bar has a pair of arrow supporting fingers for supporting an arrow in alignment with the bow string.
    Type: Grant
    Filed: January 25, 1993
    Date of Patent: July 26, 1994
    Inventor: John P. Schaffer