Patents by Inventor Denis B. Drennan

Denis B. Drennan 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: 5449339
    Abstract: A heel supporting protective boot for bed patients comprises a body formed of flexible, compressible, convoluted, non-allergenic foam material having foot and leg supporting portions for respectively supporting a patient's foot extended in an upright position and for supporting the patient's leg above the bed in a generally horizontal position with the patient's heel elevated above an adjacent bed surface. The boot includes a friction reducing material on the body below the leg and heel for providing free sliding movement of the boot over the bed surface with minimal resistance in order to avoid bunching-up of bed linens and avoiding dislocation of the patient's foot in the boot resulting in heel binding or lack of support for the sole of the patient's foot. An additional pad of a foam material may be adhesively secured to an outer surface of the boot to prevent external rotation of the leg and the pad may also be adhesively secured inside the boot adjacent the foot supporting portion to limit foot drop.
    Type: Grant
    Filed: May 6, 1994
    Date of Patent: September 12, 1995
    Assignee: DM Systems, Inc.
    Inventor: Denis B. Drennan
  • Patent number: 5433695
    Abstract: A foot piece of elastomeric material is provided for converting a new leg and foot cast and/or an already existing leg and foot cast into a walking cast by permanent attachment of the foot piece to a sole surface of the cast. The foot piece has an upper surface generally conforming to the shape and size of the sole surface of the cast and a layer of uncured adhesive material is provided on the upper surface. The adhesive layer is protected against curing or setting until ready for use by a thin layer of air-impervious film which is stripped or peeled away to initiate curing when the foot piece is pressed or forced against the sole surface of the cast and is held until the adhesive material cures or sets to provide a permanent adhesive attachment of the foot piece on the cast for converting the cast for walking.
    Type: Grant
    Filed: May 6, 1994
    Date of Patent: July 18, 1995
    Assignee: DM Systems, Inc.
    Inventor: Denis B. Drennan
  • Patent number: 4372300
    Abstract: A cast wedge for use in adjusting a tubular cast for maintaining predetermined spacing between opposite facing edges of a transverse cut made in the cast wall adjacent the area of the limb fracture. The wedge includes a body formed of molded, resinous plastic material that is radio-lucent having a wedge portion with opposite edges spaced a predetermined distance apart for direct engagement with the facing edges of the cut in the wall of the cast. Flanges are formed to extend outwardly and normal to the opposite edges of the wedge portion and the flanges have an inside surface engageable with the outer surface of the cast for limiting the inward travel of the wedge portion into the interior of the cast.
    Type: Grant
    Filed: May 13, 1981
    Date of Patent: February 8, 1983
    Assignee: DM Systems, Inc.
    Inventors: Denis B. Drennan, Donald J. Maylahn, Thomas R. Schleicher
  • Patent number: 4186738
    Abstract: A heel supporting and protective boot for bed patients comprises a body formed of flexible, resilient, open-celled, nonallergenic, sheet-like, foam material having an inside supporting surface provided with a plurality of alternate peaks and valleys, with the peaks adapted for contact against the skin of the patient. The body includes a pair of opposite sidewall portions adapted to bear against and support the sides of the patient's lower leg, ankle and foot. A leg support portion is provided between the opposite sidewall portions for supporting the patient's leg with the heel at a level above the adjacent bed surface and well exposed to the air, generally out of contact with adjoining portions of the boot. The body of the boot also includes a foot support portion for supporting the sole of the patient's foot in an upright position and without contact with the patient's heel.
    Type: Grant
    Filed: February 15, 1978
    Date of Patent: February 5, 1980
    Inventors: Thomas R. Schleicher, Donald J. Maylahn, Denis B. Drennan
  • Patent number: D311232
    Type: Grant
    Filed: December 1, 1986
    Date of Patent: October 9, 1990
    Assignee: DM Systems, Inc.
    Inventors: Denis B. Drennan, Donald J. Maylahn