Patents by Inventor Lawrence H. Burke

Lawrence H. Burke 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).

  • Pulse width modulated solenoid purge valve
    Patent number: 5649687
    Abstract: A pulse width modulated solenoid purge valve for an on board fuel vapor recovery system of an automotive vehicle is operated by a solenoid that has a pole piece and armature that are shaped to operate at high frequencies. More specifically, the pole piece and the armature have an air gap interface that is defined by a protrusion of one that always intrudes into a recess of the other by a substantial amount to reduce response time of the armature and permit operation of the solenoid at the high frequencies.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: July 22, 1997
    Assignee: Borg-Warner Automotive, Inc.
    Inventors: Manuel D. Rosas, Carolyn Klueg, Lawrence H. Burke
  • Vehicle radiator cap with auxiliary vacuum seal
    Patent number: 5169015
    Abstract: A radiator cap including a manually manipulable crown provides an auxiliary vacuum seal for sealing a potential vacuum leak path around a member penetrating through a central aperture of the crown. The member may be a rivet or stud which secures the crown, a bell housing and a discoid spring in an assembled condition. Alternatively, the member may be a vent pin connected to a manually manipulable safety lever. The auxiliary vacuum seal preferably takes the form of a resilient O-ring which surrounds the member and is sealingly interposed between the discoid spring, the member and the bell housing to seal a potential vacuum leak path between the member and the discoid spring.
    Type: Grant
    Filed: February 20, 1992
    Date of Patent: December 8, 1992
    Assignee: Stant Corporation
    Inventor: Lawrence H. Burke
  • Blade fuse manufacturing method
    Patent number: 4675990
    Abstract: A blade fuse includes parallel blades (12 and 14) secured in a body (16). A fusible link (42) welded to the blades is located in a cavity (20) of the body that is covered by a window (61). The blade fuses are assembled by blanking the fusible element from a ribbon (90) and translating it into a fuse subassembly (64). Tabs (50 and 52) secure the fusible element in the subassembly (64) until it is spot welded to blades 12 and 14. The window (61) is then blanked and translated to cover cavity (20) and secured by ultrasonic welding. A connector strip (76) is then blanked from between blades (12 and 14) to provide the blade fuse.
    Type: Grant
    Filed: November 9, 1984
    Date of Patent: June 30, 1987
    Assignee: Parker-Hannifin Corporation
    Inventors: Frank J. Viola, Erwin L. Schaub, Lawrence H. Burke
  • Blade fuse and manufacturing method
    Patent number: 4504816
    Abstract: A blade fuse includes parallel blades (12 and 14) secured in a body (16). A fusible link (42) welded to the blades is located in a cavity (20) of the body that is covered by a window (61). The blade fuses are assembled by blanking the fusible element from a ribbon (90) and translating it into a fuse subassembly (64). Tabs (50 and 52) secure the fusible element in the subassembly (64) until it is spot welded to blades 12 and 14. The window (61) is then blanked and translated to cover cavity (20) and secured by ultrasonic welding. A connector strip (76) is then blanked from between blades (12 and 14) to provide the blade fuse.
    Type: Grant
    Filed: October 31, 1983
    Date of Patent: March 12, 1985
    Assignee: Parker-Hannifin Corporation
    Inventors: Frank J. Viola, Erwin L. Schaub, Lawrence H. Burke