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| Number | Title | Issue Date |
| 7393380 | Method of guaranteeing at least one characteristic of a fluid used for producing food products A method for guaranteeing at least one characteristic of a fluid used for producing food products. This method utilizes a system for piping and delivering the fluid, combined with means for producing the products, in order to use the fluid for producing the products... | 07/01/2008 |
| 7374600 | System and method for excluding false back pressure faults after installation of a particulate trap filter A method and system for preventing or minimizing false back pressure faults caused by a new particulate filter in an engine exhaust system. When a new particulate filter is placed in an engine exhaust system, the normal back pressure threshold for the fault detectio... | 05/20/2008 |
| 7364610 | Air filter sensor The present invention is directed towards a sensor including, inter alia, a body having first and second spaced-apart apertures, the first aperture having a shape producing an audible noise upon a fluid passing therethrough; a piston positioned within the body; and ... | 04/29/2008 |
| 7309365 | Vacuum cleaner A vacuum cleaner including an electric blower for generating suction air, a collecting unit for collecting dust contained in the suction air, a dust removing unit for removing dust adhered to the collecting unit, and a dust removing stop unit for stopping an operati... | 12/18/2007 |
| 7306661 | Service recording device for a filter of an extraction hood A service recording device for a filter is particularly suited for an extraction hood with an air flow device with a variable volumetric flow. The service recording device has a counter device with a variable counting speed. The counting speed of the air flow device... | 12/11/2007 |
| 7303613 | Filter sensor and indicator for vacuum cleaners A pressure actuated electrical switch and indicator to indicate to a user that a filter vacuum cleaner requires cleaning or replacing. In a first embodiment, the pressure actuated electrical switch measures the pressure present between the filter media and the flow ... | 12/04/2007 |
| 7285149 | Oil separator for vehicle air system An oil separator for use in a vehicle air system includes a recycling valve for removing coalesced oil. The recycling valve may include a piston movable in a cylinder in response to a control air pressure to open the recycling valve and thus drain coalesced oil from... | 10/23/2007 |
| 7264642 | Exhaust gas cleaning apparatus In an exhaust gas cleaning apparatus (30) in which a before and after differential pressure (ΔP) of a filter (32) used to trap particulates is detected for regeneration of the filter (32), a time at which, during filter regeneration, the temper... | 09/04/2007 |
| 7261762 | Technique for detecting and predicting air filter condition A method and system for detecting and predicting air filter condition for an air handling system operates by determining a system resistance to air flow. The system resistance is utilized to determine a detection statistic indicative of current filter condition and ... | 08/28/2007 |
| 7244294 | Air filter monitoring system A real-time monitoring system that monitors various aspects of the operation of a refrigerant-cycle system is described. In one embodiment, the system includes a processor that measures power provided to the refrigerant-cycle system and that gathers data from one or... | 07/17/2007 |
| 7228935 | Attachment pin for an exhaust-gas muffler The invention relates to an attachment pin (1) for fixing an exhaust-gas muffler (2) in an apparatus part (4) of a portable handheld work apparatus (5) driven by an internal combustion engine. The exhaust-gas muffler (2) includes e... | 06/12/2007 |
| 7101420 | Self cleaning air filtration machine and a method for using the same Self cleaning air filtration machine and a method for using same comprising; a filter with a motor driven belt or disk or counter rotating disks that are perforated, a spray bar, a recirculation pump and supply line, a wet tank, a ultrasonic transducer, ultraviolet ... | 09/05/2006 |
| 6991674 | Monitoring arrangement for compartment air contamination An air quality monitoring arrangement is associated with an enclosed cab of an agricultural tractor used for towing or carrying spraying implements for treating crop with substances which might be toxic or otherwise harmful to people. A signal from a contaminant sen... | 01/31/2006 |
| 6837922 | Air filter sensor apparatus kit and method An air filter sensor kit and method of using the same for permitting a person to modify the filtering portion of a heating or cooling system that uses an air filter to enable the determination of when the air filter is dirty and needs changing. The air filter sensor... | 01/04/2005 |
| 6666070 | Method for testing the integrity of DPFs A method for inspecting the integrity of diesel exhaust filter by introducing air under pressure through one end of the structure and detecting the presence of air flow at an opposing end surface. The diesel exhaust filter is tested green.... | 12/23/2003 |
| 6620222 | Computer air filtering system A system for filtering air entering the housing of a computer. A filter is placed in the path of air entering the computer housing. A timing program is installed on the computer to keep track of the total amount of time the computer has run since installa... | 09/16/2003 |
| 6478849 | Vapor recovery system for fuel storage tank A vapor recovery system for a fuel storage tank. The system includes a pair of VOC adsorbent canisters that alternately recover VOC vapors from the fuel tank ullage or are regenerated. Regeneration of the VOC adsorbent canisters is provided by exhausting ... | 11/12/2002 |
| 6375725 | End-of-service indicator including porous waveguide for respirator cartridge An end-of-service indicator for use with a respirator cartridge, the end-of-service indicator having an optical waveguide having two extremities, one of the extremities being connected to a light source, the other of the extremities being connected to a d... | 04/23/2002 |
| 6273935 | Apparatus and method for trapping a toxic gas An apparatus and a method for trapping a toxic gas contained in an exhaust gas from a process chamber are disclosed. In the apparatus, two toxic gas traps are provided which are connected in series with a toxic gas sensor provided thereinbetween and in fl... | 08/14/2001 |
| 6228155 | Automatic detection and warning device of filtering net in air conditioner An automatic detection and warning device of the filtering net of an air conditioner comprises: an outer frame installed with at least one wind inlet and at least one wind outlet, a wind groove being formed between the wind inlet and the wind outlet; a sa... | 05/08/2001 |
| 6168645 | Safety system for gas purifier A gas purification system includes a gas purification unit and one or more safety devices. The gas purification unit includes an enclosure containing a purification material that exhibits an exothermic reaction when exposed to certain gas contaminants. Th... | 01/02/2001 |
| 6077336 | Air filter system An air filter system that includes a mechanism for notifying a user when a proper filter replacement period had elapsed that further includes a scenting mechanism for scenting the air flowing through the filter system with a pleasant odor. The air filter ... | 06/20/2000 |
| 5961919 | Deodorizing and sterilizing device having catalyst deterioration sensing function A deodorizing and disinfecting apparatus having catalyst deterioration detection function of the present invention comprises: an air supply portion for inhaling air inside; an ozone generating portion for discharging ozone to the inhaled air: a catalyst f... | 10/05/1999 |
| 5917141 | Air filter monitoring device An air filter monitoring device that includes an attachment mechanism for attaching the monitoring device to the cover grate of an air return of an air conditioning system and a first and a second air flow actuated switch wired electrically in series with... | 06/29/1999 |
| 5772711 | Filter blockage warning indicator Apparatus for indicating when the air intake filter of portable turbines useful with spray paint guns is blocked and a method and apparatus for close coupled mounting of a pair of series connected turbines by axially aligning and abutting the axial outlet... | 06/30/1998 |
| 5718822 | Differential pressure apparatus for detecting accumulation of particulates in a filter An apparatus and a method are provided for detecting accumulation of particulates in a fluid stream. A differential pressure switch is incorporated in the apparatus for detecting changes in pressure in the fluid stream passing through a strainer having a ... | 02/17/1998 |
| 5666949 | Exposure indicator with continuous alarm signal indicating multiple conditions An exposure indicating apparatus and indicating method includes a sensor having a property responsive to a concentration of a target species. A processing device generates a concentration signal as a function of the property and an indicator is activated ... | 09/16/1997 |
| 5498328 | Apparatus for selectively sampling filter backwash fluid This invention relates to monitoring apparatus and, in particular, but not exclusively to such apparatus for use in association with mains water supply facilities. A water works 10 has a water main 12, in which is located a filtration unit 13 having a fil... | 03/12/1996 |
| 5448677 | Electric hair dryer with clogged filter indicator A hair dryer has a housing including an air inlet opening and an air exit opening for passage of an air stream. The housing accommodates a blower structure and a heater, and the air inlet opening has associated to it a filter element. Provided in the hous... | 09/05/1995 |
| 5378254 | Filter sensing apparatus and filter therefor An air treatment system has a removable and replaceable filter, the filter having a plastic frame, and having a multi-layer filtering medium. A filter seat has a switch located along one side in contact with a flexible tab. When the filter is located in t... | 01/03/1995 |
| 5352255 | Noise maker for air filter A noise maker having a housing with a hole formed on at least one surface of the housing and a weighted member in resilient relationship over the hole. The weighted member is movable between a first position closing the hole to a second position for allow... | 10/04/1994 |
| 5324344 | System for and method to verify proper operation of a particulate emission detector A system and method are provided to verify proper operation of and to adjust a particulate emission detector in a system including a dust collector bag house. A by-pass apparatus is provided around the dust collector bag house which includes a conduit dow... | 06/28/1994 |
| 5294407 | Gas purifier having pressure responsive switch as end of life detector A gas purifier for impure gas having an end of life detector. The purifier has: A. a housing; and B. an impurity-sorbing material packed within the housing. The impurity-sorbing material has the property of reacting with impurities in the impure gas. This... | 03/15/1994 |
| 5271750 | Air filtration system with safety after-filter An air filtration system with a safety after-filter that prevents contaminated air being exhausted by using a backup filter and with a mechanism to detect tears or leaks in the primary filters. The safety after-filter assembly attaches to the exhaust of a... | 12/21/1993 |
| 5148669 | Detection of particulates in a hot gas flow An apparatus is provided for ensuring that a device--such as a gas turbine--that utilizes gases and will be damaged by particles in the gases greater than the predetermined size, will not be subjected to such particles. A filter, or the like removes parti... | 09/22/1992 |
| 5057821 | Filter sentry apparatus An apparatus including a housing secured to a filter web, wherein the housing includes a reciprocating rod directed orthogonally through the housing relative to the filter web, whereupon plugging of the filter web permits the rod to be directed through th... | 10/15/1991 |
| 4877422 | Mobile aerial lift with boom structure having insulated boom section containing a clean, moisture free environment and method A mobile aerial lift having a vehicle and a boom structure mounted on a vehicle. The boom structure has an outer extremity. A workman's basket is mounted on the outer extremity. A control is carried by the boom structure and is accessible to the workman's... | 10/31/1989 |
| 4865634 | Multiple location negative air pressure monitor A multiple location negative air pressure monitor is provided which enables the air pressure within a work space to be monitored at various locations throughout the work space so that the site operator is assured that the proper negative air pressure is m... | 09/12/1989 |
| 4793836 | Remote control for an air filtration system A remote control and monitor panel is operatively connected to an air filtration unit located within an enclosed contaminated space. The remote control and monitoring panel is located outside of the enclosed contaminated space so that the air filtration u... | 12/27/1988 |
| 4750922 | Remote control for an air filtration system A remote control and monitor panel is operatively connected to an air filtration unit located within an enclosed contaminated space. The remote control and monitoring panel is located outside of the enclosed contaminated space so that the air filtration u... | 06/14/1988 |
