Del Mar Avionics, Inc.

Other

Patentsplus LLC

Unisen, Inc.

Honeywell G.m.b.h.

Stephen K Shu

Benton Bejach

Kitchener Clark Wilson

David P Gregg

Kirk A Buhler

James W Pittaway

Bansi K Shroff

Robert C Beauchamp

W David Squires

John A Rawson

Disclosed herein is a fully implantable artificial heart. The use of flat helical springs to align and reciprocate a bellows structure allows the bellows to pump blood, the multiple solenoids with floating magnetized rods and permanent magnet assemblies held by the flat helical springs provide the power. The artificial heart pumps blood with virtually no friction and no parts to wear out. The use of solenoids advantageously move blood in a gentle, controllable manner.

Artificial heart

Disclosed herein is an artificial heart valve, comprising a valve housing comprising a distal plate and a proximal valve ring operably connected by a plurality of struts; one or more helical springs having a proximal end and a distal end; and a bellows spring having a proximal end, enclosed area, and a distal end, the distal end of the bellows spring operably attached to a first surface of a moving spring plate positioned axially in between the one or more helical springs and the bellows spring, the proximal end of the helical spring operably attached to a second surface of the moving spring plate; and a movable valve plate operably attached to the proximal end of the bellows spring, wherein the movable valve plate is configured to reversibly contact the proximal valve ring to create a seal and close the valve.

Gentle artificial heart valve with improved wear characteristics

A high gain lens system for implant into the capsular bag after removal of the natural crystalline lens. A preferred embodiment of the invention comprises a combination of a positive or convex lens and a negative or concave lens. These two lenses are spaced from one another and their relative spacing and respective focal lengths determine their combined focal length. When the lens system is inserted into the capsular bag, two opposed haptic flanges on each side, extend toward the inner radial edge of the bag adjacent the ciliary muscles. When the muscles contract, the bag is stretched thereby compressing the haptic flanges together or at least toward one another. This action cause the two lenses to separate further from each other and the increased spacing between the positive and negative lenses shortens the focal length to permit focusing of objects at near distances. On the other hand, when the muscles relax, the bag relaxes also, the haptic flanges separate and the lenses come closer together. The reduced spacing between the positive and negative lenses, increases the focal length to permit focusing of objects at far distances.

High gain wide range accommodating intraocular lens for implant into the capsular bag

An exercise machine is described which is entirely self-contained without any source of outside power. A rechargeable battery is used to maintain the exercise system operative for a time-out period. At all other times the machine is powered by the user. The machine is compact, light, rigid and sized to fit through a standard doorway. The entire exercise machine is provided with a wrap-around handrail into which a display input/output unit has been integrally provided. The exercise machine or stepper utilizes a dynamically controllable load or alternator which is controlled by a computer circuit to maintain the power input into the exercise machine or to maintain metabolically energy consumption rate within a user of the exercise machine at a predetermined, approximately constant level, regardless of the speed of stepping or the actual or effective weight of the user. The alternator is dynamically controlled by pulse width modulating its field coils. The power output by the generator is sensed by monitoring the alternator's output current and voltage. Additional load control is achieved by dissipating part of the alternator current in a dissipative load when the alternator voltage reaches a predetermined maximum set point.

Power controlled exercising machine and method for controlling the same

A novel method and apparatus utilizing conventional photo-reactive and reflective layers of a recording medium for optically recording and reading both digital and variable length, analog pulses of data, in an exacting manner to eliminate excess energy absorption by the medium and for reducing latent recording errors due to defects in the recording medium as well as due to the recording process itself. With this precise recording and reading technique, analog variable-length pulse recording, with its inherent wide bandwidth, as well as coded digital pulse recording, with its inherent narrow bandwidth, can be accommodated. The system monitors the optical transmissivity and reflectivity of the recording medium during the recording process in real time to accurately determine initial and terminal inflection points denoting inception and end of a recorded pulse in an exacting manner and to pinpoint and make allowances for recording defects which may yet yield errors on playback. A residual error reduction technique complements the variable pulse recording process by detecting and temporarily storing data and respective address at which data could not be accurately recorded due to chemical or physical anomalies in the recording medium.

Null inflection detection and pulse expand latch in an optical recording

A simple heart rate calculation process is incorporated into an exercise machine. The user controls the process by counting his/her own pulse. With the exercise machine temporarily stopped, the user finds his/her pulse with one hand, and pushes a start/stop button with the other hand. The button is pushed to stop on a count of one, and then pushed to stop on a predetermined count, e.g., 10. An embedded device automatically calculates and displays the user's heart rate.

Heart rate calculation for users of exercise machines

A micro cassette recorder-player is disclsoed having capactity for increased signal-to-noise ratio by utilizing a mobile capstan which pulls tape out of a micro cassette and across an enlarged head placed distal to and shielded from all electric motors, solenoids, and inductors which typically create spurious electric and magentic flux fields that traditionally diminish S/N.

Expanded micro cassette player-recorder

A system for optically recording information on a recording medium, such as a video disk, by pulse-code modulation (PCM). The medium includes a reflective and radiation-sensitive recordable stratum which changes optically in accordance with the signal being recorded. The signal is recorded on the medium by a slaved coherent light light beam whose intensity is controlled by the recording medium itself. The recording medium controls the recording beam power in a manner to reduce dropouts to a minimum and to assure fidelity in the recorded signal throughout a predetermined range of surface speeds of the medium despite irregularities in the recording stratum.

Optical recording system utilizing proportional real-time feedback

The specification discloses an exercise treadmill for diagnostic and therapeutic purposes incorporating an improved drive and control system. High efficiency at low rpm is effectuated through the use of a DC motor which maintains the belt speed constant by varying the width of the applied pulse duration as a function of load. Additional load buffering between the belt and motor is effectuated by a double flywheel configuration.

Low power treadmill

An opto-electronic end-of-tape sensor has a pulsed light source for producing high intensity, short duration light pulses and a photodetector controlling a clock driven digital counter. In a normal condition with tape blocking the light pulses, the counter is kept in a reset state. If a clear light path of sufficient time duration is detected the photodetector output enables the counter to reach a predetermined count to obtain an end-of-tape signal output. The sensor circuit discriminates against pinholes in the tape by requiring detection of an uninterrupted predetermined number of light pulses to generate the end-of-tape signal.

High-intensity opto-electronic sensor having low power consumption

Magnetic tape transport using DC current drive variable speed motors directly coupled to take-up and supply reels between which a tape is moved under tension. A crystal controlled PLL is referenced to a tape reference signal during steady speed operation and to a tape drive tachometer signal during start, stop and speed change cycles. The PLL controls the take-up motor drive amplifier which has a current drive output for developing motor torque. A second tension servo loop controls the supply reel motor drive amplifier which also supplies a current drive amplifier to develop motor torque. The tension servo loop has a major feedback signal component C2 which sums the motor currents as representative of the sum of the torques in the motors and the tension resulting in the tape. Additional tension components representing a steady bias C1, a take-up follower C3 and rapid deceleration signal C4 are also employed.

Tape transport

A system for encoding, recording, playing back, decoding, validating, and displaying cardiac signals obtained from a patient during ambulatory monitoring. The system permits the recording on a single track in a magnetic tape of a channel of ECG signals interrupted intermittently by blood pressure signals, time of day signals, and event marker signals. The ECG signal is recorded in analog form, but the other signals are recorded as pulse coded signals each having its own format. In the playback apparatus, decoders identify and verify each of the signals when they occur, and the played back information is plotted on a chart. If the time of day signal was not recorded on the tape, timing information can be produced by the playback apparatus from the cumulative tape travel. Fiducial signals introduced in the recording, playback, and charting operations are used in a method for identification and measurement of recording tape speed error, playback tape error, and plotter speed error.

Apparatus and method for recording and playing back electrocardial

Apparatus under control of an operator for selectively displaying signals stored on a magnetic tape. The tape is normally first played back at a high speed, with the reproduced signal displayed at high speed to permit the operator to determine which parts of the tape to view at real-time speed. In the real-time viewing mode, a segment of the tape is played again at high speed to provide a better quality signal; the signal from the segment is converted to digital form and stored in a memory for use in creating a real-time display. The operator then can view the display of the stored signal in a variety of ways: stationary, advancing at real-time speed, or in reverse at real-time speed. The length of the segment stored is relatively short to minimize the size of the memory. After a segment is played back, the tape is brought to a stop and then moved in the opposite direction to position it for playing back the next segment.

Growing community of inventors

Fountain Valley, CA, United States of America

Stephen K Shu