Patents by Inventor Stephen J. Ruskewicz
Stephen J. Ruskewicz 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).
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Publication number: 20090314372Abstract: A fluid flow regulating mechanism designed particularly for use in connection with aerosolized drug delivery devices is disclosed. The mechanism includes a housing, planar elastic element, regulating element and positioning component. The elements of the device are configured in a manner such that a flow channel through the housing is opened or closed depending on the flow rate of fluid through a flow channel.Type: ApplicationFiled: August 1, 2007Publication date: December 24, 2009Inventors: Stephen J. Ruskewicz, Justin D. Muratore
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Patent number: 7415298Abstract: A pulse oximeter sensor with a light source optimized for low oxygen saturation ranges and for maximizing the immunity to perturbation induced artifact. Preferably, a red and an infrared light source are used, with the red light source having a mean wavelength between 700-790 nm. The infrared light source can have a mean wavelength as in prior art devices used on patients with high saturation. The sensor of the present invention is further optimized by arranging the spacing between the light emitter and light detectors to minimize the sensitivity to perturbation induced artifact. The present invention optimizes the chosen wavelengths to achieve a closer matching of the absorption and scattering coefficient products for the red and IR light sources. This optimization gives robust readings in the presence of perturbation artifacts including force variations, tissue variations and variations in the oxygen saturation itself.Type: GrantFiled: February 23, 2007Date of Patent: August 19, 2008Assignee: Nellcor Puritan Bennett Inc.Inventors: James R. Casciani, Paul D. Mannheimer, Steve L. Nierlich, Stephen J. Ruskewicz
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Patent number: 7376454Abstract: A pulse oximeter sensor with a light source optimized for low oxygen saturation ranges and for maximizing the immunity to perturbation induced artifact. Preferably, a red and an infrared light source are used, with the red light source having a mean wavelength between 700-790 nm. The infrared light source can have a mean wavelength as in prior art devices used on patients with high saturation. The sensor of the present invention is further optimized by arranging the spacing between the light emitter and light detectors to minimize the sensitivity to perturbation induced artifact. The present invention optimizes the chosen wavelengths to achieve a closer matching of the absorption and scattering coefficient products for the red and IR light sources. This optimization gives robust readings in the presence of perturbation artifacts including force variations, tissue variations and variations in the oxygen saturation itself.Type: GrantFiled: October 30, 2003Date of Patent: May 20, 2008Assignee: Nellcor Puritan Bennett Inc.Inventors: James R. Casciani, Paul D. Mannheimer, Steven L. Nierlich, Stephen J. Ruskewicz
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Patent number: 7349726Abstract: Embodiments of the present invention are directed to a system and method for measuring blood oxygen saturation. Specifically, embodiments of the present invention include emitting light having a wavelength spectrum that is optimized for an oxygen saturation reading less than 80 percent, detecting the light, and transmitting signals based on the detected light, the signals being useful in determining blood oxygen saturation with a pulse oximeter.Type: GrantFiled: April 19, 2006Date of Patent: March 25, 2008Assignee: Nellcor Puritan Bennett LLCInventors: James R. Casciani, Paul D. Mannheimer, Steve L. Nierlich, Stephen J. Ruskewicz
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Publication number: 20040204639Abstract: A pulse oximeter sensor with a light source optimized for low oxygen saturation ranges and for maximizing the immunity to perturbation induced artifact. Preferably, a red and an infrared light source are used, with the red light source having a mean wavelength between 700-790 nm. The infrared light source can have a mean wavelength as in prior art devices used on patients with high saturation. The sensor of the present invention is further optimized by arranging the spacing between the light emitter and light detectors to minimize the sensitivity to perturbation induced artifact. The present invention optimizes the chosen wavelengths to achieve a closer matching of the absorption and scattering coefficient products for the red and IR light sources. This optimization gives robust readings in the presence of perturbation artifacts including force variations, tissue variations and variations in the oxygen saturation itself.Type: ApplicationFiled: October 30, 2003Publication date: October 14, 2004Applicant: Nellcor Puritan Bennett IncorporatedInventors: James R. Casciani, Paul D. Mannheimer, Steve L. Nierlich, Stephen J. Ruskewicz
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Patent number: 6662033Abstract: A pulse oximeter sensor with a light source optimized for low oxygen saturation ranges and for maximizing the immunity to perturbation induced artifact. Preferably, a red and an infrared light source are used, with the red light source having a mean wavelength between 700-790 nm. The infrared light source can have a mean wavelength as in prior art devices used on patients with high saturation. The sensor of the present invention is further optimized by arranging the spacing between the light emitter and light detectors to minimize the sensitivity to perturbation induced artifact. The present invention optimizes the chosen wavelengths to achieve a closer matching of the absorption and scattering coefficient products for the red and IR light sources. This optimization gives robust readings in the presence of perturbation artifacts including force variations, tissue variations and variations in the oxygen saturation itself.Type: GrantFiled: June 14, 2001Date of Patent: December 9, 2003Assignee: Nellcor IncorporatedInventors: James R. Casciani, Paul D. Mannheimer, Steve L. Nierlich, Stephen J. Ruskewicz
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Publication number: 20020082489Abstract: A pulse oximeter sensor with a light source optimized for low oxygen saturation ranges and for maximizing the immunity to perturbation induced artifact. Preferably, a red and an infrared light source are used, with the red light source having a mean wavelength between 700-790 nm. The infrared light source can have a mean wavelength as in prior art devices used on patients with high saturation. The sensor of the present invention is further optimized by arranging the spacing between the light emitter and light detectors to minimize the sensitivity to perturbation induced artifact. The present invention optimizes the chosen wavelengths to achieve a closer matching of the absorption and scattering coefficient products for the red and IR light sources. This optimization gives robust readings in the presence of perturbation artifacts including force variations, tissue variations and variations in the oxygen saturation itself.Type: ApplicationFiled: June 14, 2001Publication date: June 27, 2002Inventors: James R. Casciani, Paul D. Mannheimer, Steve L. Nierlich, Stephen J. Ruskewicz
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Patent number: 6272363Abstract: A pulse oximeter sensor with a light source optimized for low oxygen saturation ranges and for maximizing the immunity to perturbation induced artifact. Preferably, a red and an infrared light source are used, with the red light source having a mean wavelength between 700-790 nm. The infrared light source can have a mean wavelength as in prior art devices used on patients with high saturation. The sensor of the present invention is further optimized by arranging the spacing between the light emitter and light detectors to minimize the sensitivity to perturbation induced artifact. The present invention optimizes the chosen wavelengths to achieve a closer matching of the absorption and scattering coefficient products for the red and IR light sources. This optimization gives robust readings in the presence of perturbation artifacts including force variations, tissue variations and variations in the oxygen saturation itself.Type: GrantFiled: January 6, 1998Date of Patent: August 7, 2001Assignee: Nellcor IncorporatedInventors: James R. Casciani, Paul D. Mannheimer, Steve L. Nierlich, Stephen J. Ruskewicz
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Patent number: 5971951Abstract: Devices for the generation of inhalable aerosols by extrusion through a porous membrane by a motor-driven cam assembly are disclosed. The device holds a drug formulation container in a drug release position. The package is comprised of a collapsible wall with an opening and a cover for the opening that includes a porous membrane having a plurality of pores therein with a diameter in the range of 0.5 to 6.0 microns. An electric motor in the device is powered by a battery to rotate a cam assembly having three cams. The first cam forces a clamping member (configured to correspond to the outer periphery of the container) against the periphery of the collapsible wall of the container, sealing the jointure of the collapsible wall to the cover of the container along the entire periphery, except for a small unsealed portion thereof. The second cam crushes the collapsible wall, forcing the contents of the container through the unsealed portion of the jointure.Type: GrantFiled: September 28, 1998Date of Patent: October 26, 1999Assignee: Aradigm Corp.Inventor: Stephen J. Ruskewicz
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Patent number: 5855564Abstract: Devices for the generation of inhalable aerosols by extrusion through a porous membrane by a motor-driven cam assembly are disclosed. The device holds a drug formulation container in a drug release position. The package is comprised of a collapsible wall with an opening and a cover for the opening that includes a porous membrane having a plurality of pores therein with a diameter in the range of 0.5 to 6.0 microns. An electric motor in the device is powered by a battery to rotate a cam assembly having three cams. The first cam forces a clamping member (configured to correspond to the outer periphery of the container) against the periphery of the collapsible wall of the container, sealing the jointure of the collapsible wall to the cover of the container along the entire periphery, except for a small unsealed portion thereof. The second cam crushes the collapsible wall, forcing the contents of the container through the unsealed portion of the jointure.Type: GrantFiled: August 20, 1997Date of Patent: January 5, 1999Assignee: Aradigm CorporationInventor: Stephen J. Ruskewicz
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Patent number: 5839439Abstract: An oximeter sensor formed with a housing made of a relatively rigid material into which the oximeter electrical components can be mounted is provided. An overmolded material, of lesser rigidity, is injection-molded over the housing to complete the sensor. In one embodiment the housing is made of plastic, such as polypropylene, and the overmolded material is an injection-molded thermal plastic elastomer, such as Santoprene.TM. (polypropylene with 1 micron size particles of rubber). The housing preferably contains thin portions connecting thicker portions which support the electrical and optical components. These thin portions provide natural bending portions in the final oximeter sensor. By having the thin portions near or at the central, neutral axis of the sensor, flexibility is optimized in the longitudinal direction, while the housing provides stiffness laterally.Type: GrantFiled: November 13, 1995Date of Patent: November 24, 1998Assignee: Nellcor Puritan Bennett IncorporatedInventors: Steve L. Nierlich, Phillip S. Palmer, James R. Casciani, Mitch Levinson, Stephen J. Ruskewicz
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Patent number: 5782237Abstract: A pulse oximeter sensor with a light source optimized for low oxygen saturation ranges and for maximizing the immunity to perturbation induced artifact. Preferably, a red and an infrared light source are used, with the red light source having a mean wavelength between 700-790 nm. The infrared light source can have a mean wavelength as in prior art devices used on patients with high saturation. The sensor of the present invention is further optimized by arranging the spacing between the light emitter and light detectors to minimize the sensitivity to perturbation induced artifact. The present invention optimizes the chosen wavelengths to achieve a closer matching of the absorption and scattering coefficient products for the red and IR light sources. This optimization gives robust readings in the presence of perturbation artifacts including force variations, tissue variations and variations in the oxygen saturation itself.Type: GrantFiled: March 30, 1995Date of Patent: July 21, 1998Assignee: Nellcor Puritan Bennett IncorporatedInventors: James R. Casciani, Paul D. Mannheimer, Steve L. Nierlich, Stephen J. Ruskewicz
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Patent number: 5421329Abstract: A pulse oximeter sensor with a light source optimized for low oxygen saturation ranges and for maximizing the immunity to perturbation induced artifact. Preferably, a red and an infrared light source are used, with the red light source having a mean wavelength between 700-790 nm. The infrared light source can have a mean wavelength as in prior art devices used on adults. The sensor of the present invention is further optimized by arranging the spacing between the light emitter and light detectors to minimize the sensitivity to perturbation induced artifact. The present invention optimizes the chosen wavelengths to achieve a closer matching of the absorption and scattering coefficient products for the red and IR light sources. This optimization gives robust readings in the presence of perturbation artifacts including force variations, tissue variations and variations in the oxygen saturation itself.Type: GrantFiled: April 1, 1994Date of Patent: June 6, 1995Assignee: Nellcor, Inc.Inventors: James R. Casciani, Paul D. Mannheimer, Steve L. Nierlich, Stephen J. Ruskewicz
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Patent number: 5377675Abstract: The present invention provides a method and apparatus for improved fetal contact with a fetal probe. The easily insertable probe includes a means for adjusting the position of the probe so that a sensor makes firm contact with the fetus. In one embodiment, the position is adjusted via a biasing segment of the probe which rotates about a fulcrum. In another embodiment, the position is adjusted via a bladder.Type: GrantFiled: June 24, 1992Date of Patent: January 3, 1995Assignee: Nellcor, Inc.Inventors: Stephen J. Ruskewicz, James R. Casciani
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Patent number: 5187990Abstract: A hand held self-contained automated pipette for portable operation having an electrically operated digital linear actuator. The actuator preferably includes a stepper motor driving a rotor. A threaded screw is coaxially positioned within the rotor and is connected to an actuator shaft having elongate grooves slidable in a guide for preventing shaft rotation so that precise linear motion is imparted to the shaft. A pipetting displacement assembly having one of various sizes is removably attached for actuation by a common actuator including programmed movement of a displacing piston in a displacement cylinder to optimize air interface volume, neutralize variations in vacuum pipette effects, and provide an accommodated stroke and readout for improved accuracy while pipetting and/or titrating different ranges of volumes. Upon calibration the piston undertakes immediate excursion to an end of travel limit and after motor slippage is retracted to a home position.Type: GrantFiled: April 16, 1992Date of Patent: February 23, 1993Assignee: Rainin Instrument Co., Inc.Inventors: Magnussen, Jr. Haakon T., Stephen J. Ruskewicz, Gary L. Smith, Anthony K. Wingo
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Patent number: 4905526Abstract: A hand held self-contained automated pipette for portable operation having an electrically operated digital linear actuator. The actuator preferably includes a stepper motor driving a rotor. A threaded screw is coaxially positioned within the rotor and is connected to an actuator shaft having elongate grooves slidable in a guide for preventing shaft rotation so that precise linear motion is imparted to the shaft. A pipetting displacement assembly having one of various sizes is removably attached for actuation by a common actuator including programmed movement of a displacing piston in a displacement cylinder to optimize air interface volume, neutralize variations in vacuum pipette effects, and provide an accommodated stroke and readout for improved accuracy while pipetting and/or titrating different ranges of volumes. Upon calibration the piston undertakes immediate excursion to an end of travel limit and after motor slippage is retracted to a home position.Type: GrantFiled: June 8, 1987Date of Patent: March 6, 1990Assignee: Rainin Instrument Co., Inc.Inventors: Haakon T. Magnussen, Jr., Gary L. Smith, Stephen J. Ruskewicz, Anthony K. Wingo
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Patent number: 4671123Abstract: A hand held self-contained automated pipette for portable operation having an electrically operated digital linear actuator. The actuator preferably includes a stepper motor driving a rotor. A threaded screw is coaxially positioned within the rotor and is connected to an actuator shaft having elongate grooves slidable in a guide for preventing shaft rotation so that precise linear motion is imparted to the shaft. A pipetting displacement assembly having one of various sizes is removably attached for actuation by a common actuator including programmed movement of a displacing piston in a displacement cylinder to optimize air interface volume, neutralize variations in vacuum pipette effects, and provide an accommodated stroke and readout for improved accuracy while pipetting and/or titrating different ranges of volumes. A control circuit is provided so that the back EMF of the stepper motor coils is recirculated when power is duty-cycled off for power conservation.Type: GrantFiled: February 16, 1984Date of Patent: June 9, 1987Assignee: Rainin Instrument Co., Inc.Inventors: Haakon T. Magnussen, Jr., Gary L. Smith, Stephen J. Ruskewicz, Anthony K. Wingo
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Patent number: 4616514Abstract: A pipette is disclosed which includes a pipette body, a tip locking mechanism, and a disposable pipette tip. The pipette body has a plunger which reciprocates into and out of an interior air filled chamber. This air forces a measured amount of liquid into or out of the tip. After pipetting, an over-stroke of the plunger discharges a blast of air to assure discharge of all the fluid. In one embodiment, a further over-stroke unlocks a mechanism holding the shell in place and actuates tip disposal and replacement. The shell surrounding the pipette body is depressed by the plunger shaft. Fingers formed from the lower end of the shell are pushed outward by cam action with the pipette body. As the fingers spread, the tip falls free. A replacement tip is then attached. The fingers also define a funnel which guides the replacement tip on to the point where it snaps into position.Type: GrantFiled: December 20, 1985Date of Patent: October 14, 1986Assignee: Rainin Instrument Co., Inc.Inventors: Haakon T. Magnussen, Jr., Stephen J. Ruskewicz
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Patent number: 4389163Abstract: A pressure booster system for fluids using one or more injectors for delivering a relatively low pressure output flow of fluid. A fluid accumulator receives the output from one or more injectors. A detector reveals any fluid mass change in the accumulator in relation to a selected value of fluid mass. A relatively high pressure pump increases the pressure of the output flow from the accumulator in accordance with the change of fluid mass within the accumulator which results in high pressure metering.Type: GrantFiled: June 19, 1981Date of Patent: June 21, 1983Assignee: Altex Scientific, Inc.Inventors: Haakon T. Magnussen, Jr., Stephen J. Ruskewicz