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PumpPump description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20080095645, Pump. Brief Patent Description - Full Patent Description - Patent Application Claims
CROSS-REFERENCE TO RELATED APPLICATIONS [0001]This non-provisional patent application claims priority under 35 U.S.C. .sctn.119(a) from Patent Application No. 0620857.3 filed in Great Britain on 20 Oct. 2006. BACKGROUND OF THE INVENTION [0002]1. Field of the Invention [0003]The invention relates to a pump and in particular to a pump suitably for use in a portable steam cleaner, especially for domestic use and to a pump suitable for use therewith. [0004]2. Description of Prior Art [0005]Steam cleaning appliances are well known, including small portable appliances used for general cleaning, de-greasing and sterilizing. They generally have a steam generator in the form of a heater or boiler supplied with water from an enclosed water tank by a small solenoid pump. While this is satisfactory for a basic appliance, there are inherent disadvantages resulting from this design. The solenoid pump either operates at one speed or requires complex electronic circuitry to change the frequency of the incoming power supply to operate at a different speed as the speed of a solenoid pump is linked to the frequency of the driving power. With only a single speed, the supply of water to the boiler and thus the steam generator is not controllable. The steamer first heats up the boiler and then water is added at a constant rate into the boiler which lowers the temperature of the boiler, reducing the temperature of the steam produced. During delivery along the outlet tube from the boiler, the steam has a tendency to cool down and condenses, the cooler the boiler the faster the steam condenses. SUMMARY OF THE INVENTION [0006]It is an object of the invention to overcome or at least reduce these problems. [0007]Accordingly, in one aspect thereof, the present invention provides a peristaltic pump for moving a liquid, comprising: a motor having a motor shaft; a pump housing, including a pump body, forming a pump chamber, the pump housing being fixed to the motor; the pump chamber accommodating a number of rollers having an integral gear in mesh with a cog fixed to the motor shaft for rotation therewith; a first gear carrier having a number of axles on which the rollers are rotatably mounted respectively for maintaining a fixed spatial relationship between the rollers; and a resiliently collapsible tube, passing through the pump chamber and arranged to be compressed against a wall of the pump chamber by at least one roller at all times as the rollers rotate within the pump chamber. [0008]Preferably, the first gear carrier is rotatably mounted to the motor shaft. [0009]Preferably, the first gear carrier is rotatably mounted to the motor shaft by way of a bearing. [0010]Preferably, the first gear carrier is mounted to the distal end of the motor shaft. [0011]Preferably, a second gear carrier is fitted to the distal end of the axles. [0012]Preferably, the second gear carrier is journalled on the motor shaft. [0013]Preferably, the rollers have a cylindrical portion and a gear portion wherein the cylindrical portion has a smaller diameter than the gear portion. [0014]Preferably, the pump housing is formed by a first part which connects directly to a housing of the motor and a second part. [0015]Preferably, the second part of the pump housing is formed by two parts, an pump body having a cavity forming a peripheral wall of the pump chamber and an upper part with the upper part and the first part forming upper and lower caps for the pump body and closing axial ends of the pump chamber for the pump chamber. [0016]Preferably, the upper and lower caps are connected to the pump body by snap fit connectors. BRIEF DESCRIPTION OF THE DRAWINGS [0017]A preferred embodiment of the present invention will now be described, by way of example only, with reference to the accompanying drawings, in which: [0018]FIG. 1 is a schematic sectional side view of a preferred portable steam cleaner; [0019]FIG. 2 illustrates a variable speed motor driven pump, being a preferred pump for the steamer of FIG. 1; [0020]FIG. 3 is an exploded view of the pump of FIG. 2; Continue reading about Pump... Full patent description for Pump Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Pump 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 Pump or other areas of interest. ### Previous Patent Application: Mobile wear and tear resistant gas compressor Next Patent Application: Electrically driven compressor integral with inverter device, and vehicle air conditioner where the compressor is used Industry Class: Pumps ### FreshPatents.com Support Thank you for viewing the Pump patent info. IP-related news and info Results in 0.21101 seconds Other interesting Feshpatents.com categories: Tyco , Unilever , Warner-lambert , 3m 174 |
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