Patents by Inventor Donald L. Hannula

Donald L. Hannula 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: 4776791
    Abstract: A shield for use with a pair of orthodontic pliers in removing an orthodontic bracket. The shield fits snuggly onto one jaw of the pliers and provides side walls adjacent the plier jaws. The jaws have a recess near their distal end such that the confronting surfaces of the jaw recesses and the confronting surfaces of the side walls provide an enclosure about a bracket while it is being removed so that if it fractures the enclosure will contain any pieces that may break off the bracket.
    Type: Grant
    Filed: January 12, 1988
    Date of Patent: October 11, 1988
    Assignee: Johnson & Johnson Consumer Products, Inc.
    Inventors: Donald L. Hannula, Frank Silva
  • Patent number: 4634427
    Abstract: An implantable demand medication delivery assembly for delivering measured aliquots of liquid medication. The assembly includes a reservoir which stores the liquid medication to be delivered. The assembly also includes a pump which is in fluid communication with the reservoir. The pump includes a housing having an inlet port in fluid communication with the reservoir and an outlet port. Connected to the outlet port is a delivery catheter for delivering the liquid medication to a site within the patient wherein the assembly is implanted. The pump also includes a fluid passage which extends between the inlet and outlet port. A chamber is provided along the fluid passage for containing a preselected volume of liquid medication to be delivered. A resilient deformable wall on the pump extends over the chamber. A one-way valve is provided in the fluid passage between the inlet port and chamber for permitting fluid flow toward the chamber.
    Type: Grant
    Filed: September 4, 1984
    Date of Patent: January 6, 1987
    Assignee: American Hospital Supply Company
    Inventors: Donald L. Hannula, Frederick L. Coe
  • Patent number: 4464168
    Abstract: A shunt system for implantation in the body which can be used for transferring cerebrospinal fluid is disclosed. The shunt system comprises a body having an upper and lower surface and a distal and proximal end. The body includes a central cavity through the upper surface at a first and second port. A proximal fluid flow channel extends through the proximal end of the body and opens at a third port on the upper surface. A distal fluid flow channel extends through the distal end of the body and opens at a fourth port on the upper surface. A resilient dome comprised of a self-sealing material is attached to and extends over the upper surface of the body. A first portion of the resilient dome extends over the first and third ports on the upper surface defining a first chamber. The first portion of the resilient dome cooperates upon flexing with the third port to occlude the third port. A second portion of the resilient dome extends over the second and fourth ports on the upper surface defining a second chamber.
    Type: Grant
    Filed: November 26, 1982
    Date of Patent: August 7, 1984
    Assignee: American Hospital Supply Corporation
    Inventors: Russell J. Redmond, Donald L. Hannula
  • Patent number: 4435174
    Abstract: A catheter guide is provided which has a base having a first channel extending thereacross for receiving a catheter. An arcuately extending member extends outwardly from the base. A second channel extends along the arcuately extending member for also receiving a catheter. The first and second channels extending respectively across the base and along the arcuately extending member can be enclosed or partially enclosed for retaining a catheter within the channels and within the catheter guide.
    Type: Grant
    Filed: April 12, 1982
    Date of Patent: March 6, 1984
    Assignee: American Hospital Supply Corporation
    Inventors: Russell J. Redmond, Donald L. Hannula
  • Patent number: 4364395
    Abstract: A shunt system for implantation in the body which can be used for transferring cerebrospinal fluid is disclosed. The shunt system comprises a body having an upper and lower surface and a distal and proximal end. The body includes a central cavity opening through the upper surface at a first and second port. A proximal fluid flow channel extends through the proximal end of the body and opens at a third port on the upper surface. A distal fluid flow channel extends through the distal end of the body and opens at a fourth port on the upper surface. A resilient dome comprised of a self-sealing material is attached to and extends over the upper surface of the body. A first portion of the resilient dome extends over the first and third ports on the upper surface defining a first chamber. The first portion of the resilient dome cooperates upon flexing with the third port to occlude the third port.
    Type: Grant
    Filed: June 30, 1981
    Date of Patent: December 21, 1982
    Assignee: American Heyer-Schulte Corporation
    Inventors: Russell J. Redmond, Donald L. Hannula
  • Patent number: D307473
    Type: Grant
    Filed: January 12, 1988
    Date of Patent: April 24, 1990
    Assignee: Johnson & Johnson Consumer Products, Inc.
    Inventor: Donald L. Hannula