Dunfee
Al Dunfee, Byfield, MA US
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20160015362 | INTRAVASCULAR DEVICES, SYSTEMS, AND METHODS HAVING MOTORS - Medical imaging devices and systems are provided. The medical imaging devices may include a transducer to transmit ultrasound signals (waves) and to receive the reflected ultrasound signals for imaging a vessel of interest. Embodiments may include disposing the transducer at a proximal end of the intravascular device and disposing a motor at a distal end of the intravascular device along with a rotatable acoustic mirror. The transducer may transmit and receive the ultrasound signals to and from the rotatable acoustic mirror via an acoustic lumen extending along the length of the device. Other embodiments may include disposing the transducer, the motor, and the rotatable acoustic mirror at the distal end of the medical imaging device. Further embodiments may include using a concentric layered structure to provide multiple conductors for transmitting signals to and receiving signals from components disposed at the distal end of the intravascular device. | 01-21-2016 |
Albert Dunfee, Byfield, MA US
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20120108922 | Implantable Medical Sensor and Fixation System - An implantable medical device, such as a sensor for monitoring a selected internally detectable physiological parameter of a patient, is attached to a fixation member that is deployable within the patient to position and orient the sensor to enable it to perform its function. The fixation member may be configured to lie in a single plane when deployed or may be tubular in shape. The attachment of the housing and fixation member includes providing the fixation member with a linear attachment strut that is non-circular in cross section and providing the housing with external members that define an elongate channel, non-circular in cross section and receptive to the attachment strut. The attachment strut can be inserted transversely into the channel and the external member can be crimped over the strut to secure the housing and fixation member together. | 05-03-2012 |
20120108986 | Implantable Medical Sensor and Fixation System - An implantable medical device, such as a sensor for monitoring a selected internally detectable physiological parameter of a patient, is attached to a fixation member that is deployable within the patient to position and orient the sensor to enable it to perform its function. The fixation member may be configured to lie in a single plane when deployed or may be tubular in shape. The attachment of the housing and fixation member includes providing the fixation member with a linear attachment strut that is non-circular in cross section and providing the housing with external members that define an elongate channel, non-circular in cross section and receptive to the attachment strut. The attachment strut can be inserted transversely into the channel and the external member can be crimped over the strut to secure the housing and fixation member together. | 05-03-2012 |
Albert H. Dunfee, Byfield, MA US
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20120109002 | MEDICAL DEVICE FIXATION ATTACHMENT MECHANISM - A fixation member configured to anchor an implantable medical device within a patient is attached to an implantable medical device by introducing at least a portion of the fixation member in a tube mechanically connected to the medical device, and plastically deforming the tube in order to pinch the fixation member within a hollow space of the tube. | 05-03-2012 |
Matthew J. Dunfee, Belle Plaine, MN US
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20090030359 | Ambulatory traction - A device and method for applying intermittent passive traction (IPT) that includes an initial phase followed by a sustained traction phase and finally a relaxation phase. During the first phase of IPT, the spinal elements are placed under gentle traction. This period of time reduces the normal forces across the vertebral bodies, facet joints, paraspinal musculature, etc. The second phase holds the spine in sustained traction, further reducing the forces across the spinal elements, encouraging natural healing to occur and allowing the muscles a period of relaxation. The third phase includes the gradual reduction of traction. During this final phase, the normal forces across the spine are reestablished as the IPT device slowly releases traction. The method resolves many of the most limiting problems associated with traction, CPM, and passive treatment modalities. | 01-29-2009 |
20090036888 | Ambulatory spinal unloading method and apparatus - An ambulatory spinal unloading method and apparatus are implemented to achieve a desired minimum level of residual cushioning in response to a biasing force applied to the associated apparatus tensioning and/or compression mechanism(s). The ambulatory spinal unloading apparatus may further include a treatment system to provide desired levels of nerve and/or muscle stimulation in addition to hot and/or cold elements to provide further therapeutic effects as desired or necessary. | 02-05-2009 |
Susan J. Dunfee, Belle Plaine, MN US
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20090036888 | Ambulatory spinal unloading method and apparatus - An ambulatory spinal unloading method and apparatus are implemented to achieve a desired minimum level of residual cushioning in response to a biasing force applied to the associated apparatus tensioning and/or compression mechanism(s). The ambulatory spinal unloading apparatus may further include a treatment system to provide desired levels of nerve and/or muscle stimulation in addition to hot and/or cold elements to provide further therapeutic effects as desired or necessary. | 02-05-2009 |
William D. Dunfee, Newark, DE US
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20130112761 | Methods, Systems, And Apparatus Providing Temperature-Controlled Process Fluid - Disclosed are systems and apparatus adapted to control a temperature of a process fluid in an instrument. In one aspect, the systems and apparatus are adapted to control fluid temperature provided to a feed tank. The feed tank may feed a metering system and metering line of an instrument such as a clinical analyzer. The fluid temperature control system includes a process fluid inflow, a process fluid outflow, a first fluid path fluidly coupled to the process fluid inflow and outflow, and at least one heat exchanger thermally coupled to the first fluid path, wherein the heat exchanger is adapted to extract heat for at least one heat-generating component of the instrument. Controlling a temperature of the process fluid at the feed tank improves metering accuracy. Methods of operating the system are provided, as are other aspects. | 05-09-2013 |
20150140679 | COMPOSITIONS AND METHODS FOR LIQUID MIXING ASSESSMENT - Compositions include an aqueous solution of an organic dye of molecular weight in the range of about 300 to about 1,000 and a density-enhancing material. An amount of the density-enhancing material in the aqueous solution is sufficient to achieve a density of about 1.0 to about 1.3 g/mL. The composition has a viscosity of about 3.5 to about 5.0 centipoise. The compositions are useful in assessing the adequacy of a liquid handling mixing device to mix a reaction mixture. | 05-21-2015 |
20150276534 | METHODS AND APPARATUS FOR MEASURING ASPIRATION PRESSURE AT LOW ASPIRATION VOLUMES - A method adapted to allow aspiration verification of a liquid such as a biological liquid or liquid reagent at low aspiration volumes (e.g., less than 25 μL). The method includes attempting to aspirate a volume of a liquid into a probe at an aspiration frequency, measuring an aspiration pressure associated with the attempted aspiration of the liquid and providing a measured pressure signal, and filtering the measured pressure signal with a filter. The filter has a passband frequency containing the aspiration frequency and excluding the frequencies of a disturbance causing noise in the measured pressure signal. Apparatus for carrying out the method are provided, as are other aspects. | 10-01-2015 |
William David Dunfee, Newark, DE US
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20090075386 | CLOG DETECTION IN A CLINICAL SAMPLING PIPETTE - Analyzing the pressure profile generated during a predetermined period of time prior to the end of an aspiration or dispensing process and comparing a pressure reading to predetermined values to determine if the aspiration or dispensing pipette was free of clogs. | 03-19-2009 |
20120127821 | Method For Mixing Liquid Samples In A Container Using A Lemniscate Stirring Pattern - A method for rapidly and uniformly mixing solutions within a biochemical analyzer by rapidly and repeatedly moving a sampling probe in generally lemniscate shaped pattern within the solution is provided. | 05-24-2012 |
20140024133 | METHOD FOR OPTIMIZING VERTICAL PROBE ALIGNMENT USING DIAGNOSTIC MIXING ROUTINES - A method and apparatus for adjusting the height of a tip of a mixing element, such as a needle probe, compares the mixing efficiency observed at two heights separated by a predetermined distance. The heights can be incrementally adjusted to determine the location of the bottom of a mixing vessel and, by extension, the approximate location for placing the mixing element for efficient mixing of solutions in the mixing vessel. | 01-23-2014 |