Patents by Inventor Richard H. Porterfield

Richard H. Porterfield 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: 5787774
    Abstract: A method and bandsaw apparatus (30) which facilitates maintenance access to a continuous loop bandsaw blade (43) rotatably mounted thereon. The bandsaw apparatus (30) includes a base frame (31) and a cutting table (32) supported on top of the frame (31) to provide a cutting surface (33). A saw carriage assembly (37) is provided including a saw arm assembly (37) rotatably supporting the saw blade (43) which extends through a blade receiving slot (34) in the table (32). A support frame (42) movably mounted to a guide assembly (44) enables selective reciprocating movement of the saw arm assembly (40) relative the cutting table (32) so that the blade (43) can move along the receiving slot (34). A coupling device (45) of the carriage assembly (37) movably couples the saw arm assembly (40) to the support frame (42) for movement of the saw arm assembly (40) between a cutting position and a maintenance access position.
    Type: Grant
    Filed: October 3, 1997
    Date of Patent: August 4, 1998
    Assignee: HEM, Inc.
    Inventors: Mark P. Richards, Richard H. Porterfield
  • Patent number: 5526727
    Abstract: A method and bandsaw apparatus (30) which facilitates maintenance access to a continuous loop bandsaw blade (43) rotatably mounted thereon. The bandsaw apparatus (30) includes a base frame (31) and a cutting table (32) supported on top of the frame (31) to provide a cutting surface (33). A saw carriage assembly (37) is provided including a saw arm assembly (37) rotatably supporting the saw blade (43) which extends through a blade receiving slot (34) in the table (32). A support frame (42) movably mounted to a guide assembly (44) enables selective reciprocating movement of the saw arm assembly (40) relative the cutting table (32) so that the blade (43) can move along the receiving slot (34). A coupling device (45) of the carriage assembly (37) movably couples the saw arm assembly (40) to the support frame (42) for movement of the saw arm assembly (40) between a cutting position and a maintenance access position.
    Type: Grant
    Filed: October 28, 1994
    Date of Patent: June 18, 1996
    Assignee: HEM, Inc.
    Inventors: Mark P. Richards, Richard H. Porterfield
  • Patent number: 5353910
    Abstract: A feed table apparatus (30) for moving a workpiece (31) toward a machine tool. The apparatus (30) comprises a roller assembly (32) which provides rolling support of the workpiece (31) toward machine tool and a shuttle vise assembly (36) for moving the workpiece (31) longitudinally along the roller assembly (32). The shuttle vise (36) includes a reaction frame (37) having a first upright post (40) and a second upright post (40') A coupling mechanism (43) movably mounts the reaction frame (37) directly to the elongated roller framework (33) for longitudinal relative movement therealong. The coupling mechanism (43) further couples the reaction frame (37) to the roller framework (33) in a manner transferring reaction forces, caused by clamping the workpiece (31) with opposing vise jaws (41, 41') to the roller framework (33).
    Type: Grant
    Filed: December 23, 1992
    Date of Patent: October 11, 1994
    Assignee: Hem, Inc.
    Inventors: Gerald R. Harris, Richard H. Porterfield