Patent application number | Description | Published |
20160101227 | Medical Treatment System and Methods Using a Plurality of Fluid Lines - Improvements in fluid volume measurement systems are disclosed for a pneumatically actuated diaphragm pump in general, and a peritoneal dialysis cycler using a pump cassette in particular. Pump fluid volume measurements are based on pressure measurements in a pump control chamber and a reference chamber in a two-chamber model, with different sections of the apparatus being modeled using a combination of adiabatic, isothermal and polytropic processes. Real time or instantaneous fluid flow measurements in a pump chamber of a diaphragm pump are also disclosed, in this case using a one-chamber ideal gas model and using a high speed processor to obtain and process pump control chamber pressures during fluid flow into or out of the pump chamber. Improved heater control circuitry is also disclosed, to provide added or redundant safety measures, or to reduce current leakage from a heater element during pulse width modulation control of the heater. Improvements are also disclosed in the application of negative pressure during a drain phase in peritoneal dialysis therapy, and to control the amount of intraperitoneal fluid accumulation during a therapy. Improvements in efficiency are also disclosed in the movement of fluid into and out of a two-pump cassette and heater bag of a peritoneal dialysis cycler, and in the synchronization of the operation of two or more pumps in a peritoneal dialysis cycler or other fluid handling devices using a multi-pump arrangement. | 04-14-2016 |
20160101278 | Medical Treatment System and Methods Using a Plurality of Fluid Lines - Improvements in fluid volume measurement systems are disclosed for a pneumatically actuated diaphragm pump in general, and a peritoneal dialysis cycler using a pump cassette in particular. Pump fluid volume measurements are based on pressure measurements in a pump control chamber and a reference chamber in a two-chamber model, with different sections of the apparatus being modeled using a combination of adiabatic, isothermal and polytropic processes. Real time or instantaneous fluid flow measurements in a pump chamber of a diaphragm pump are also disclosed, in this case using a one-chamber ideal gas model and using a high speed processor to obtain and process pump control chamber pressures during fluid flow into or out of the pump chamber. Improved heater control circuitry is also disclosed, to provide added or redundant safety measures, or to reduce current leakage from a heater element during pulse width modulation control of the heater. Improvements are also disclosed in the application of negative pressure during a drain phase in peritoneal dialysis therapy, and to control the amount of intraperitoneal fluid accumulation during a therapy. Improvements in efficiency are also disclosed in the movement of fluid into and out of a two-pump cassette and heater bag of a peritoneal dialysis cycler, and in the synchronization of the operation of two or more pumps in a peritoneal dialysis cycler or other fluid handling devices using a multi-pump arrangement. | 04-14-2016 |
Patent application number | Description | Published |
20130143174 | ILLUMINATED SCALER HAND PIECE IN A VETERINARY DENTAL DEVICE - A light is built directly into a scaler hand piece and adds little or no additional bulk or weight thereto. The light allows a Veterinarian or Technician to directly illuminate an area to be worked, with the hand piece providing a bright, clear source of light with no shadows. The light can be emitted from a light tube disposed along a scaler insert device, providing emission of light near the tip of the scaler insert. The light can be easily placed directly into a patient's oral cavity. With the light built into the scaler, it does not add any additional bulk and the scaler hand piece and light source can be easily directed to the area that requires work. The light source, being mounted directly into the scaler hand piece, is more cost efficient compared to purchasing a separate external light source to be affixed to the scaler hand piece. | 06-06-2013 |
20130143175 | ILLUMINATED MICRO-MOTOR HAND PIECE IN A VETERINARY DENTAL DEVICE - A micro-motor hand piece solves the problem of a lack of directly focused light in a patient's oral cavity when polishing a patient's teeth or performing dentistry. The source of illumination is built directly into the nose of the micro-motor hand piece to flood the area around the working tip of the micro-motor hand piece with light. The light is automatically focused in the area in which the Veterinarian or Technician is working, without casting any shadows in the area undergoing the procedure. The light can be from, for example, three light emitting diodes (LEDs), or some other light source, such as a fiber optic light source, incorporated directly into the nose of the micro motor hand piece. | 06-06-2013 |
Patent application number | Description | Published |
20110129222 | SYSTEM AND METHOD FOR OPTICAL BYPASS ROUTING AND SWITCHING - Optical bypass circuits are selected and created with a desired amount of traffic on each circuit to offload from the IP routers, the maximum possible amount of traffic. In a first phase, each node in a network independently determines the maximum number of optical bypass circuits, configured to their maximum capacity, to as many destinations, that could possibly originate at that node. The determination is made by aggregating traffic from a given traffic matrix. The optical bypass circuit transports traffic that originates at the node plus transient traffic that the node receives from other nodes. In the second phase, the node will eliminate an optical bypass circuit found in the first phase if any of its parent nodes created a necessarily longer optical bypass circuit to the same destination. In addition, if a descendent node has more aggregate traffic to fill more bypass circuits than the parent node, then the extra optical bypass circuits from the descendent node are also created. | 06-02-2011 |
20120113896 | Skip Ahead Routing in Wireless Ad Hoc Networks - A wireless ad hoc network may be composed of several nodes that are coupled by communication links and configured dynamically. As the packet is transmitted from one node to the next node or hop in a predetermined route, a neighboring node, within the same transmission range, may hear the broadcasted transmission. If the neighboring node determines that a future hop on the route includes the neighboring node, the neighboring node may receive the packet at that time thereby skipping one or more hops along the route. The neighboring node may then forward the packet to the next node in the route. | 05-10-2012 |