Abstract: A pressure system for liquid chromatography allows multiple fluid lines to be driven in parallel by a single pump. A fluid pressure medium supply provides fluid pressure to the system. The fluid pressure medium supply is connected to a plurality of fluid transfer pipes, each with a flow limiter. The fluid pressure medium supply is configured to provided more flow than the flow limiters combined, and excess flow is either diverted with a pressure limiter or reduced with a pressure adjuster, or both. Further layers of pressure and flow control may be added with additional pressure limiters and/or pressure adjusters and flow limiters connected together. In some cases, multiple lines containing different fluids may be driven by the same pressure source through the use of flexible fluid delivery inner containers, each within a rigid container that is pressurized by the pressure source.

Abstract: A pressure system for liquid chromatography allows multiple fluid lines to be driven in parallel by a single pump. A fluid pressure medium supply provides fluid pressure to the system. The fluid pressure medium supply is connected to a plurality of fluid transfer pipes, each with a flow limiter. The fluid pressure medium supply is configured to provided more flow than the flow limiters combined, and excess flow is either diverted with a pressure limiter or reduced with a pressure adjuster, or both. Further layers of pressure and flow control may be added with additional pressure limiters and/or pressure adjusters and flow limiters connected together. In some cases, multiple lines containing different fluids may be driven by the same pressure source through the use of flexible fluid delivery inner containers, each within a rigid container that is pressurized by the pressure source.

Abstract: A fluid feeding device utilizes one or more fluid driving devices to cause pressure changes in an outer container of one or more fluid transfer units to change the pressure in a fluid delivery inner container within the outer container in order to expel or intake a transmitted fluid from or into the inner container, exempting the fluid feeding device from directly contacting the transmitted fluid.

Abstract: A fluid feeding device utilizes one or more fluid driving devices to cause pressure changes in an outer container of one or more fluid transfer units to change the pressure in a fluid delivery inner container within the outer container in order to expel or intake a transmitted fluid from or into the inner container, exempting the fluid feeding device from directly contacting the transmitted fluid.

Abstract: This utility model relates to a type of addition agent releasing device used for dental water jet, which is equipped with at least one holding space for releasing addition agents. For example, if the addition agent is toothpaste, each holding space should be equipped with at least one inlet channel entering into the holding space with certain angle, one outlet channel, and without or with at least one water bypass that makes some of the water will not flow into the holding space. The above-mentioned technical solution results in the following technical benefits: 1. The water can spurt into the holding space with addition agent in it at oblique direction and release addition agent evenly; 2. The adjusting device for water flow can adjust flow of the water which flows into the holding space; therefore, it can adjust the time of releasing addition agent; 3. Using addition agent is simple and easy; 4. Small in size, easy to be constructed individually or compounded with other functional parts.

Abstract: This is to announce the invention of a new oral irrigation device, dubbed the “Toothflush”, which is made up of a faucet adapter, hose, handle, and flushing head. The hose connects to the water source (e.g. a faucet) via the adapter on one end, and connects to the handle on the other end. The handle in turn connects to the flushing head. There are two or more slits or holes in variable sizes and shapes on the flush head arranged in any pattern. During operation, the water flows through the faucet adapter, hose, handle, and then out through the holes in the flushing head, to fulfill its objective of cleansing the teeth, tongue and oral cavity. The device's strengths lie in its simplicity, convenience of use, and effectiveness in carrying out its objective.