Patents by Inventor William A. Krupicka

William A. Krupicka 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: 4598939
    Abstract: Exit device has auxiliary bolt which when held in by door strike permits a blocking leg to prevent unauthorized forced retraction of main latch bolt. Normal operation of device by panic bar pivots blocking leg out of the way and then retracts main latch bolt.
    Type: Grant
    Filed: June 8, 1984
    Date of Patent: July 8, 1986
    Assignee: Scovill Inc.
    Inventors: William A. Krupicka, Lawrence D. Butts, Sidney J. Lampley
  • Patent number: 4404825
    Abstract: A stop disposed in the bottom of the shackle heel bore normally blocks movement of a pin holding the cylinder in the casing. Raising the stop when the lock is unlocked permits the pin to move away from the cylinder freeing the cylinder for replacement.
    Type: Grant
    Filed: May 12, 1981
    Date of Patent: September 20, 1983
    Assignee: Scovill Inc.
    Inventors: David Dixon, William A. Krupicka
  • Patent number: 4300370
    Abstract: For locking an object to a stationary structure, a securing device comprising an ordinary padlock, a C-shaped housing embracing the body of the padlock, the top of the housing being apertured to receive the shackle of the padlock, and fastening means to hold the housing to the structure.
    Type: Grant
    Filed: April 3, 1980
    Date of Patent: November 17, 1981
    Assignee: Scoville Inc.
    Inventors: Donald J. Kaiser, Albert Behar, William A. Krupicka
  • Patent number: 4158952
    Abstract: A padlock of the type having a removable locking plug or cylinder capable of being removed from the top through a top opening in the lock case, also has a cap for the top opening. This cap is locked into the padlock case by a loose ball fitting in a groove in the cap and in the case. This cap locking ball is in addition to two other conventional locking balls used to lock the shackle in one conventional type padlock. The shackle is retained by another ball which is carried by a shackle leg and cooperates with another groove in the case. The shackle locking ball is placed in or out of locking position by adjustment of a set screw in the shackle leg.
    Type: Grant
    Filed: July 14, 1978
    Date of Patent: June 26, 1979
    Assignee: Medeco Security Locks, Inc.
    Inventors: Roy N. Oliver, Glenn K. Hartman, William A. Krupicka