Patent application number | Description | Published |
20080219847 | Method and apparatus for propelling an intercepted fluid - An apparatus that is rotatable around a first axis to propel an intercepted fluid in a radial direction. The apparatus has a support capable of being rotated around the first axis, a first blade assembly, and a second blade assembly. The first blade assembly has a first blade with a first substantially flat surface residing in a first plane that is substantially parallel to the first axis. The second blade assembly has second and third blades respectively having second and third substantially flat surfaces residing respectively in second and third planes, each extending substantially parallel to the first axis with the second blade assembly in an operative position on the support. A single piece defines at least a part of the second and third substantially flat surfaces. The second blade assembly is separate from the first blade assembly and joined to the support in the operative position so that the first, second and third blades cooperatively propel intercepted fluid in a radial direction relative to the first axis as the apparatus is rotated around the first axis. | 09-11-2008 |
20090191493 | Apparatus and method for controlling a damper in a gas-fired appliance - A gas-fired appliance is provided having a burner which is configured to receive and burn pressurized gas, such as natural gas, during operation. A control comprises a pressure switch having an inlet exposed to pressure from the pressurized gas during operation of the burner, a battery, and a motor operatively connected to the battery and the pressure switch which is operated in response to the application of pressurized gas at the inlet. A damper assembly is connected to the motor. The damper assembly comprises a damper movable between an open position and a closed position in response to operation of the motor. | 07-30-2009 |
20090191495 | Apparatus and method for controlling a damper in a gas-fired appliance - A damper mechanism for a gas-fired appliance is disclosed. The damper mechanism is mechanically operated in response to changes in pressure within a portion of the appliance. Changes in gas pressure operate to displace a diaphragm, thereby moving a linkage attached to a flue damper, such that the damper can be moved between open and closed positions. An interim damper control activation arm can pivot in response to movement of the linkage to actuate electrical switches, which act to close a magnetic pilot valve when the damper is in a partially-opened or partially-closed position. | 07-30-2009 |
20090277399 | Water heater and method of operating a waterheater - A water heater having of a tank defining a storage space for water. A heat source in a combustion chamber is operable to heat water in the storage space and has a first state and a heating state. A flue is part of a gas flow passage through which combustion gases are communicated towards a first location. A flue damper has closed and open states. A powered device in an on state induces flow of combustion gases from the combustion chamber towards the first location. A control is configured to: a) process a user input identifying a target output water temperature and generate a call for heat; and b) in response thereto i) cause the powered device to change from its first state; ii) cause the flue damper to change from its closed state towards its open state; and iii) cause the heat source to change from its first state into its heating state. | 11-12-2009 |
20100139532 | Apparatus for generating heat through burning of solid fuel and method of controlling such an apparatus - An apparatus for generating heat and consisting of: a) a firebox; b) a combustor assembly; c) a fuel inlet; d) an air inlet through which air is delivered to a combustion location; e) an outlet for releasing heated air; f) an outlet damper assembly; and g) an inlet damper assembly. The inlet and outlet damper assemblies are constructed to both be placed or maintained in safety states in response to the apparatus being placed in certain predetermined states to thereby prevent, or smother, combustion of solid fuel within the apparatus. | 06-10-2010 |
20140027660 | LOW LEAKAGE FLUE DAMPER - A flue damper comprises a damper gate having first and second sides, and first and second seal stops. In one embodiment, a first seal is mounted to the first side of the damper gate and has a free end in sealing engagement with the first seal stop under pressure conditions, while a second seal is mounted to the second side of the damper gate and has a free end in sealing engagement with the second seal stop under the pressure conditions. In an alternative embodiment, the first seal is mounted to the first seal stop and has a free end in sealing engagement with the first side of the damper gate under pressure conditions, while the second seal is mounted to the second seal stop and has a free end in sealing engagement with the second side of the damper gate under the pressure conditions. | 01-30-2014 |
20140352684 | LINEAR SLIDE DAMPER SYSTEM - A damper system comprises a damper blade having open and closed states. The damper blade is movable in a linear direction only between the open and closed states. The damper blade may fully overlap with a flue passage in the closed state, and the damper blade may lack any overlap with the flue passage in the open state. A portion of the damper blade may directly contact a switch activation arm in the open state, wherein the switch activation arm confirms the open state of the damper blade. | 12-04-2014 |
20160109137 | LOW PROFILE DAMPER SYSTEM FOR OVENS - A damper system comprises a damper slide adapted to couple to a wall with a first outlet. In one embodiment, the damper slide has a first opening and is adapted to operate in a first position and a second position. In the first position, the first opening is at least partially aligned with the first outlet. The first opening and the first outlet are at least partially offset in the second position. | 04-21-2016 |