32results about How to "Sufficient vacuum" patented technology

A device for separating plasma from whole blood is provided having an evacuated primary collection chamber capable of fluid communication through a porous filter to an evacuated secondary collection chamber. An agglutinating agent is provided within the primary collection chamber so as to aggregate blood cells within a whole blood sample. The porous filter has a pore size which is small enough to capture the aggregated blood cells therein, yet large enough to permit plasma to transfer therethrough under pressures associated with conventional evacuated blood collection tubes. The primary and secondary collection chambers may be provided in separate containers or tubes, with transfer occurring therebetween through a transfer device including the porous filter therein.

A vacuum pump system for creating a high vacuum (below 10-7 TORR) especially useful for vacuum volumetric measurements such as are performed using a gas sorption analyzer on a particulate sample to determine particulate surface area and porosity using a dry, non-lubricant oil-free vacuum pumping system that includes a turbomolecular drag pump having its high vacuum side connected to a vessel that contains the particulate sample to be analyzed, and in series with a dry, oil-free diaphragm pump whose inlet or vacuum side is connected to the high pressure exhaust side of the turbomolecular drag pump thereby eliminating any possibility of oil vapor contamination of the sample since the turbomolecular drag pump and the diaphragm pump use essentially no oil as lubricants.

A cleaning robot comprising a robot machine body (100). Drive wheels (110) are arranged on the machine body (100). A dust intake opening (120) is provided at the bottom part of the machine body (100). With the direction in which the cleaning robot travels serving as the front (A), a static seal (130) is arranged at the rear and two sides of the dust intake opening (120). The lower edge of the static seal (130) extends towards a to-be-cleaned work surface (B). A dynamic sealing element (140) is arranged at the front of the dust intake opening (120). The dynamic sealing element (140) comprises an actuating element (141) and a dynamic seal (142). A gap between the dynamic seal (142) and either the edge of the dust intake opening (120) and/or the to-be-cleaned work surface (B) forms an air intake opening. The dynamic seal (142) is driven by the actuating element (141) into motion, thus allowing the area of the air intake opening to change dynamically. By arranging the dynamic sealing element (140) at the dust intake opening (120), not only the dust intake opening (120) is provided with a sufficient degree of vacuum, but also the dynamic sealing element (140) does not obstruct dust particles from reaching the dust intake opening (120), thus allowing for a simplified structure and increased cleaning efficiency.

The invention relates to a MEMS (Micro Electro Mechanical Systems) device in the form of a pressure control valve suitable for controlling the operation of a refrigeration compressor. The pressure control valve is responsive to a reference pressure controlled by a microvalve.

The invention discloses a vacuum pump control system and method with dual pressure sensors, comprising a vacuum tank, a vacuum pump controller, a vacuum pump connected with a hose of the vacuum tank, the signals of the vacuum pump and the vacuum pump controller are connected, and the vacuum tank is also provided with an insulating Pressure sensor, differential pressure sensor and the joint used to connect with the vehicle brake booster system, the absolute pressure sensor, differential pressure sensor and vacuum pump controller signal connection; the absolute pressure sensor is used to monitor the absolute pressure value in the vacuum tank, the differential pressure Sensors are used to monitor the difference between the pressure inside the vacuum tank and atmospheric pressure. The invention provides a vacuum pump control system and method with dual pressure sensors, which can control the pressure of the vacuum source in different regions according to the local atmospheric pressure, and can accurately judge the abnormality of the sensor and provide an emergency plan.

Methods and systems for providing vacuum to a vehicle are described. In one example, a method adjusts an engine air-fuel ratio in response to provide additional vacuum to the vehicle.

A dental device that mates a high volume extraction unit to a tongue retractor to allow the dental assistant to remove fluids and debris from the mouth of a patient with ease and using a minimal volume of the space in a patient's mouth. The device has a straw collar that encircles the shaft of a suction straw in a “Vee” configuration with a set of opposing half-bands. A post extending inward from the front half band locks the suction straw in place. Affixed to the suction straw is a paddle shaped tongue retractor with an array of orifices there through to allow the vacuuming of fluids and debris from the bottom side of the retractor.

A vacuum storage bag not requiring the use of an external vacuum source. With a resilient sponge compressible polymeric material mass such as a rectangular sheet or any shape of sufficient thickness that is an integral part of an opposing wall of storage bag, a vacuum can be produced by compressing sponge within this sealable bag. The sponge being an integral part of inner bag wall will not shift and interfere with a valve or bag closure. By compressing the resilient sponge material/resilient mass flattening or rolling contents along with a food product/dry goods or any other material that is to be stored, and forcing the air volume out of the sealable bag, utilizing one of the many valved zipper closures or pinch rail valve closure systems expelling the air. Any residual air not exhausted from bag will mostly be trapped within sponge material when sponge expands.

The invention relates to an explosion-proof dilution sampling probe. The explosion-proof dilution sampling probe comprises a probe shell, a vacuum generator arranged in the probe shell, a sound speedsmall hole communicated with the vacuum generator, a fixing device and a sampling probe tube fixed on the outer wall of the probe shell and communicated with the sound speed small hole. The vacuum generator comprises a mounting plate and an air distribution disc integrally connected to one side of the mounting plate; the sound speed small hole comprises a flow stabilizing pipe and an air guide pipe integrally connected with the flow stabilizing pipe, wherein the diameter of the air guide pipe is smaller than that of the flow stabilizing pipe; the fixing device comprises a base fixedly connected to the mounting plate and communicated with the vacuum generator and a fastener that is used for fixing the air guide pipe to the base when the air guide pipe is inserted into the base. The explosion-proof dilution sampling probe has the advantages that workers can conveniently replace sound velocity small holes with different hole diameters so as to meet different environment requirements; meanwhile, the probe has an explosion-proof function and is suitable for first-area and second-area dangerous places and indoor and outdoor installation of explosive gas mixtures of IIA-IIC levels and T1-T3 groups.

The invention relates to an automatic trunk loading device for bagged materials. The automatic trunk loading device for bagged materials comprises an aspiring mechanism and a vacuumizing mechanism connected in parallel, wherein the aspiring mechanism and the vacuumizing mechanism connected in parallel are connected to a general gas port of an integral adsorption disc; at least one suction head isarranged on the adsorption surface of the adsorption end of the integral adsorption disc; and an optoelectronic switch is arranged on the integral adsorption disc. The automatic trunk loading device for bagged materials provided by the invention can solve the technical problem that the degree of automation of an operating mechanism stops in a relatively low level as existing travelling cranes forlarge materials for a long term in environments such as a hoisting warehouse, a plant and a stock ground are operated in driving cabs by professional operators.