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  Heated plumbing ventUSPTO Application #: 20070207718Title: Heated plumbing vent Abstract: A heated component for incorporation as a section of a waste collection pipe has an inner passageway and a chamber foxmed about the passageway. A heating element is located in the chamber and supplies heat to the passageway to melt ice formed in the passageway. (end of abstract)
Agent: Blake, Cassels & Graydon LLP - Toronto, ON, CA Inventor: Lorne R. Heise USPTO Applicaton #: 20070207718 - Class: 454043000 (USPTO) Related Patent Categories: Ventilation, Chimney Or Stack, Having Flue Heater The Patent Description & Claims data below is from USPTO Patent Application 20070207718. Brief Patent Description - Full Patent Description - Patent Application Claims
CROSS REFERENCE TO RELATED APPLICATIONS [0001] This application is a continuation of PCT/CA2005/0014 filed on Sep. 14, 2005 which claims priority from Canadian Patent Application No. 2,481, 493 filed on Sep. 14, 2004 and U.S. Provisional Patent Application No. 60/609,277 filed on Sep. 14, 2004 and U.S. patent application Ser. No. 11/105,445 filed Apr. 14, 2005, and is also a continuation-in-part of U.S. patent application Ser. No. 11/105,445 filed on Sep. 14, 2005 which claims priority from U.S. Provisional Patent Application No. 60/609,277 filed on Sep. 14, 2004. FIELD OF THE INVENTION [0002] The present invention relates to components of waste systems. DESCRIPTION OF THE PRIOR ART [0003] A plumbing system typically includes a water supply system to transfer water from a water main to appliances within a house and a waste system to carry waste products to a sewer or other disposal system. The waste system is typically made up of a relatively large diameter collection pipe that is connected to the outlets of appliances, sinks, toilets or the like through fluid traps- The waste system also includes a vent pipe to vent gaseous products and water vapour from the sewer to the outside of a building. The gaseous products can be sewer gases or other unpleasant fumes that may be noxious or hazardous if allowed to back up within the building. [0004] It is well known to incorporate a vent pipe into a building by extending a pipe, made of a material such as acrylonitrile butadiene styrene (ABS) or polyvinyl chloride (PVC), from the waste system to the exterior of the building. In sub-freezing temperatures, such as those typically encountered in northern climates, the water vapour within the waste system and that escapes the ventilation pipe, may condense when contacting the colder outside air, and begin to freeze against the inner wall of the ventilation pipe eventually completely blocking the vent pipe. With the vent pipe blocked, the gases cannot escape the plumbing system and may back up into the building. Similarly, the water vapour in the collection pipe may condense on the walls of the pipe, freeze and eventually block pipe. [0005] It is therefore an object of the present invention to provide a component of a waste fluid system which obviates or mitigates at least one of the above mentioned disadvantages. SUMMARY OF THE INVENTION [0006] According to one aspect of the present invention, there is provided a component for incorporation in a waste system comprising a body defining a passageway for fluids, a chamber formed about the body and having a heating element located therein and a connection at at least one end of the body to permit communication with said passageway attachment to another component of the waste system. [0007] According to another aspect of the present invention there is provided a vent cap for connection to a vent pipe of a plumbing system to vent gas to atmosphere. The vent cap has a body defining a passageway for gas and a heating element to supply heat to the passageway and thereby inhibit freezing of water vapour in the passageway. [0008] In one embodiment, the present invention provides a vent cap comprising a pair of nested pipes and secured to one another to define a void therebetween. A heating element is situated within the void and is capable of radiating heat for transfer from the outer surface of the inner pipe to the inner surface of the inner pipe to inhibit freezing of the water vapour in the vent pipe. [0009] Preferably, the vent cap has a cord along its axis to retain ice axially and as a further preference a bridge is extended across a lower end of said inner pipe to inhibit downward movement of a mass of ice. [0010] As a further preference the heating element is an electric heating element. In another embodiment the heating element is a fluid conduit that passes heated fluid through the void. [0011] To facilitate heat transfer in to the inner pipe, a metal foil is wrapped about the outer surface of the inner pipe within the void and a reflective foil is placed around the inner wall of the outer pipe. [0012] Preferably, the chamber includes insulation to inhibit heat transfer from the chamber. BRIEF DESCRIPTION OF THE DRAWINGS [0013] Embodiments of the invention will now be described by way of example only with reference to the accompanying drawings in which: [0014] FIG. 1 is a cross-sectional view of a building, with a waste handling system installed. [0015] FIG. 2 is a perspective view of a component of the system of FIG. 1. [0016] FIG. 3 is a cross-sectional view of the vent along the line III-III of FIG. 2. [0017] FIG. 4 is a partial enlarged view of the cap shown in FIG. 7. [0018] FIG. 5 is an exploded view of FIG. 2 illustrating the assembly of the component of FIG. 2. [0019] FIG. 6 is a schematic view of alternative heating element controls. Continue reading... Full patent description for Heated plumbing vent Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Heated plumbing vent 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 Heated plumbing vent or other areas of interest. ### Previous Patent Application: Disk dispensing apparatus with ejector unit Next Patent Application: Heater or air conditioner for a vehicle Industry Class: Ventilation ### FreshPatents.com Support Thank you for viewing the Heated plumbing vent patent info. IP-related news and info Results in 5.4856 seconds Other interesting Feshpatents.com categories: Computers: Graphics , I/O , Processors , Dyn. Storage , Static Storage , Printers |
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