Patents by Inventor Alexander W. McPherson

Alexander W. McPherson 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).

  • Power clamp with track wiper
    Patent number: 4854564
    Abstract: Power clamp with track wiper for protecting anti-friction roller bearings running in close fitting reaction tracks from buildup of powdery substance encountered on certain welding conditions which is carried by the atmosphere and clings to the bearing track leading to eventual binding after prolonged reciprocation. The track wiper is carried on the bearing shaft with loose-fitting relation to each roller bearing but with close scraping relation to the bearing track surfaces.
    Type: Grant
    Filed: August 29, 1988
    Date of Patent: August 8, 1989
    Assignee: Delaware Capital Formation, Inc.
    Inventors: Alexander W. McPherson, Larry M. Witt
  • Locking power clamp
    Patent number: 4793602
    Abstract: Air pressure actuated locking gripper stack clamp wherein in a pair of gripper arms are equally and oppositely actuated by a central piston rod and track follower means with needle reaction bearings connected to the inner ends of a pair of arm actuating links. An oval air cylinder with major axis in the plane of gripper arm actuation accommodates installation in narrow space and compact stacking of multiple clamps.
    Type: Grant
    Filed: October 26, 1987
    Date of Patent: December 27, 1988
    Assignee: De-Sta-Co Division, Dover Resources, Inc.
    Inventor: Alexander W. McPherson
  • Rotary powered linear actuated clamp
    Patent number: 4723767
    Abstract: Rotary powered linear actuated clamp having hollow electric motor drive shaft coupled to threaded nut axially retained by reaction roller thrust bearings driving a linear threaded rod having integral toggle linkage actuator guided by anti-friction rollers in linear lateral reaction tracks.
    Type: Grant
    Filed: August 8, 1986
    Date of Patent: February 9, 1988
    Assignee: De-Sta-Co Division, Dover Resources, Inc.
    Inventors: Alexander W. McPherson, Alan Harkrader
  • Locking power clamp
    Patent number: 4637597
    Abstract: Air pressure actuated locking power clamp released from static loaded condition by air pressure no greater than locking pressure notwithstanding a differential smaller release pressure area due to piston rod of air cylinder. Highly pressurized needle bearings in straight track portions of the clamp which actuate links connected to a pivoted clamp arm are critical elements in providing unexpected low pressure release. Similar needle bearings in all loaded pivots of conventional toggle clamps provide 100% improvement in ratio of apply force to clamping force.
    Type: Grant
    Filed: July 6, 1984
    Date of Patent: January 20, 1987
    Assignee: De-Sta-Co Division/Dover Corporation
    Inventors: Alexander W. McPherson, Hazem N. Hamed
  • Locking power clamp
    Patent number: 4458889
    Abstract: Air pressure actuated locking power clamp released from static loaded condition by air pressure no greater than locking pressure notwithstanding a differential smaller release pressure area due to piston rod of air cylinder. Highly pressurized needle bearings in straight track portions of the clamp which actuate links connected to a pivoted clamp arm are critical elements in providing unexpected low pressure release.
    Type: Grant
    Filed: September 29, 1982
    Date of Patent: July 10, 1984
    Assignee: Dover Corporation (De-Sta-Co. Div.)
    Inventors: Alexander W. McPherson, Hazem N. Hamed