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Hand-held vacuum pump and automated urinary drainage system using pump thereofRelated Patent Categories: Pumps, Motor Driven, Electric Or Magnetic Motor, Rotary Expansible Chamber PumpHand-held vacuum pump and automated urinary drainage system using pump thereof description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20060159567, Hand-held vacuum pump and automated urinary drainage system using pump thereof. Brief Patent Description - Full Patent Description - Patent Application Claims
BACKGROUND OF THE INVENTION [0001] The present invention relates to a hand-held vacuum pump, and specifically to a hand-held vacuum pump preferable for an automated urinary drainage system. [0002] An example of the urine suction apparatus for urinary drainage for the people finding difficulty in moving on his or her own ability to the place where he or she relieve himself or herself is described in the Japanese Patent Application Laid-Open No. 2003-126242. In the urine suction apparatus sited in this Patent Gazette, a urine storage container is located between the urine receiver and the suction pump operated as the suction engine. When the urine is discharged into the urine receiver, the urine discharge is detected and the discharged urine is sucked from the suction pipeline into the urine storage container. In this operation, the suction operation of the suction pump is controlled by referring to the signal from the pressure sensor for detecting the changes in the pressure inside the urine storage container. [0003] A lightweight vacuum pump is used generally for the suction pump. An example of this type of vacuum pump is described in the Japanese Patent Application Laid-Open No. 2002-195180 and the Japanese Patent Application Laid-Open No. 8-296575. In the compressor described in the Japanese Patent Application Laid-Open No. 2002-195180, in order to improve the sliding characteristic and ultimately the efficiency, such a sliding member as providing a continuous lubrication function by means of self-lubricating operation is provided at the rotary compressor. In contrast, in the movable vane compressor and vacuum pump described in the Japanese Patent Application Laid-Open No. 8-296575, the compressor room and the pump room for the sealing fluid are partitioned separately and hermetically, and the sealing fluid discharged out from the pump room is supplied to the sealing part and the lubricating part. [0004] In the conventional urine suction apparatus sited in the Japanese Patent Application Laid-Open No. 2003-126242, what is disclosed is that the operation state of the suction pump operated as suction engine is changed in response to the pressure inside the urine storage container. However, in the Japanese Patent Application Laid-Open No. 2003-126242, there is not sufficient consideration for downsizing the suction pump and reducing its operation noise. In case of downsizing the overall system in order to increase the portability of the urine suction apparatus, it is required to downsize the suction pump itself. Although one of the most effective methods for downsizing the pump is to increase the rotating speed of the pump, in case of attempting to increase the rotating speed of the pump, especially the positive displacement pump generally used as the small-sized pump, the relative gap between the rotating member and the stationary member increases which leads to reducing the efficiency. In addition, increasing the rotating speed simply may result in the increase in the noise generated from the pump. As for the urine suction apparatus, the usage out of doors as well as the usage bedside especially in the night should be considered, which requires inevitably the reduction of the noise. [0005] In contrast, in the compressor sited in the Japanese Patent Application Laid-Open No. 2003-126242 and Japanese Patent Application Laid-Open No. 8-296575, the reliability of the sealing part and the lubricating part is increased in order to prevent the reduction in efficiency due to the downsizing of the overall system. However, as this compressor is not intended to be used for the hand-held medical device such as urinary drainage system, the downsizing of the compressor may experience a complexity in the structure of the compressor itself that is the result of the design respecting the performance primarily. In addition, the intended use of the compressor does not assume the usage in the night, and thus, there is not sufficient consideration of the reduction of the noise generated in the intermittent operation of the compressor. BRIEF SUMMARY OF THE INVENTION [0006] In order to solve the problems in the prior art, an object of the present invention is to downsize the vacuum pump and increase its portability. Another object of the present invention is to increase the reliability of the vacuum pump having portability. Further another object of the present invention is to enable the urinary drainage system having a vacuum pump to be used in the night and out of doors. [0007] The characterized feature of the present invention to achieve the above object is that, in the hand-held vacuum pump in which the electric motor and the main body of the vacuum pump are connected through the shaft coupling, one bearing supporting the driving shaft included in the main body of the vacuum pump is supported by the cylinder and the other bearing is supported by the flange mounted hermetically at the cylinder, and the end part of the cylinder near the electric motor accommodates the shaft coupling and is engaged with the end part of the electric motor, and the electric motor supports the cylinder. [0008] In the characterized feature described above, the round hole to be engaged with the rotating shaft of the electric motor is formed at one side of the shaft coupling and the quasi-square hole to be engaged with the driving shaft passing through inside the cylinder is formed at the other side of the shaft coupling, and the hole to be engaged with the rotating shaft of the electric motor is formed at the driving shaft, which may eliminates preferably the locking screw for fixing the shaft coupling and the rotating shaft of the electric motor. In addition, it is preferable that the material of the shaft coupling is made to be resin, and plural protruding parts extending in the axial direction on the inside face of the round hole formed at the shaft coupling are formed, or that plural holes extending in the radial direction communicating with this round hole are formed. [0009] In the characterized feature described above, it is preferable that a couple of sliding cylinders having a circular arc part and clamping both sides of the intermediate part of the extension part configured as a plate structure is provided, and this sliding cylinder is supported by the cylinder and the sliding cylinder is made oscillating inside the cylinder, and the cylinder and the piston are formed as double cylinders, and that the pump room is formed so that the shape of the pump room may change between the double cylinders. [0010] In the characterized feature described above, it is preferable that the piston is mounted at the driving shaft through the eccentric shaft, this piston has a blade part configured as a plate structure extending towards the outer side at a part of its periphery, the sliding cylinder having a circular arc part supports this blade part so as to freely oscillate, and that the material of the driving shaft is made to be stainless steel, the material of the shaft coupling is made to be PC resin or POM resin, the material of the piston is made to be PS resin or PC resin, the material of the cylinder is made to be PBT resin, and the material of the sliding cylinder is made to be PPS resin or PBT resin. Note that PC stands for Polycarbonade, POM stands for Polyacetal, PS stands for Polystyrene, PPS stands for Polyphenylene Sulfide, and PBT stands for Polybutylene Terphthalate. [0011] In addition, in the characterized feature described above, it is preferable that the balance weight is mounted at the end part of the driving shaft for compensating the eccentricity between the piston and the eccentric shaft, and the cover for covering the balance weight is mounted at the flange, and the material of the flange is made to be POM resin, and the cylinder and the piston are formed as double cylinders, and that the gas inside the pump room is compressed by changing the volume of the pump room formed between the double cylinders by oscillating the blade part. [0012] In addition, in the characterized feature described above, it is preferable that the beveled cut part having a cross-sectional shape of shaft shaped in D-sigmoid is formed at the driving shaft, and the hole corresponding to this D-sigmoid shape is formed at the eccentric shaft, and plural protruding parts extending in the axial direction are formed inside the hole shaped in D-sigmoid formed at the eccentric shaft, and that the support part supporting the sliding cylinder is formed at the cylinder, and the suction passage for sucking the gas into the cylinder and the discharge passage for discharging the gas are mounted near this support part and the double cylinder part so as to be almost vertical to the vibrating blade part, and a valve configured in a sheet structure for opening and closing the discharge passage and a discharge valve presser for pressing down this valve are provided at the discharge passage. In addition, it is preferable that the diameter of the hand -held vacuum pump is 30 mm or shorter, its length is 70 mm or shorter, and its weight is 250 g or lighter, and the electric motor is driven by the dry cell or the secondary battery providing an output voltage between 4V and 9V, and that the overall exhaust velocity when driven by this vacuum pump at 4000 to 6000 rpm is about 80 mL/sec. [0013] In another characterized feature of the present invention, the automated urinary drainage system includes the hand-held vacuum pump having either one of the characterized aspects described above which provides the exhaust speed around 80 mL/sec and the weight of 250 g or lighter. [0014] According to the present invention, as the structure of the vacuum pump is simplified, it will be appreciated that the downsizing of the vacuum can be attained and the portability can be increased. As the positioning accuracy at the individual parts is increased by using a simplified structure and the lubrication between the stationary parts and the moving parts are sufficiently provided, it will be appreciated that the reliability of the vacuum pump having portability can be increased. As the positioning accuracy is increased, it will be appreciated that the number of noise generation sources and their noise intensity can be reduced, and the urinary drainage system to which this vacuum pump is applied can be used in the night and/or out of doors. BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS [0015] FIG. 1 is a side cross-section view of one embodiment of the hand-held vacuum pump of the present invention. [0016] FIG. 2 is an A-A cross-section view of FIG. 1. [0017] FIG. 3 is a perspective exploded view of the rotor part of the vacuum pump shown in FIG. 1. [0018] FIG. 4 is a perspective exploded view of the shaft coupling of the vacuum pump shown in FIG. 1. [0019] FIG. 5 is a perspective exploded view of the driving shaft part used for the vacuum pump shown in FIG. 1. [0020] FIG. 6 is a side view of the shaft coupling used for the vacuum pump shown in FIG. 1. [0021] FIG. 7 is a perspective exploded view of another embodiment of the shaft coupling used for the vacuum pump shown in FIG. 1. Continue reading about Hand-held vacuum pump and automated urinary drainage system using pump thereof... Full patent description for Hand-held vacuum pump and automated urinary drainage system using pump thereof Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Hand-held vacuum pump and automated urinary drainage system using pump thereof patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Hand-held vacuum pump and automated urinary drainage system using pump thereof or other areas of interest. ### Previous Patent Application: Method and system for pumping powder, and powder coating apparatus Next Patent Application: Multi-stage rotary compressor Industry Class: Pumps ### FreshPatents.com Support Thank you for viewing the Hand-held vacuum pump and automated urinary drainage system using pump thereof patent info. IP-related news and info Results in 0.4023 seconds Other interesting Feshpatents.com categories: Medical: Surgery , Surgery(2) , Surgery(3) , Drug , Drug(2) , Prosthesis , Dentistry 174 |
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