Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 7341475 | Ground rod cap A ground rod cap is disclosed. The ground rod cap includes a crown portion and a support portion connected to the crown portion. The crown portion is configured to receive a ground rod. ... | 03/11/2008 |
| 7162751 | Ventilated toilet system A ventilated toilet system with a toilet bowl, a toilet tank and a ventilation system. The ventilated toilet system has a vacuum system motor to expel odors from the ventilated toilet system via odor exhaust piping of varying widths, with an impeller and a housing f... | 01/16/2007 |
| 6959457 | Roof vent ingress prevention device A roof vent ingress prevention device includes a generally tubular base having a circumferential side wall, a lower pipe-engaging section and an upper section having at least two side vents formed therein, the side vents extending through the side wall for venting o... | 11/01/2005 |
| 6954947 | Pluming vent cover A pluming vent cover is described herein which is easily manufactured and adapted to a roof on or off-site. A roof's pluming vent pipe requires a cover for both aesthetics and improved operation. In the preferred embodiment the pluming vent cover comprises an upper ... | 10/18/2005 |
| 6786815 | Apparatus for venting rooms with exhaust fans An apparatus for venting several rooms having exhaust fans through existing roof openings made for existing ventilation systems, including turbine ventilators, roof ventilators, ridge ventilators and hip ventilators. The vent apparatus has two side panels, a bottom ... | 09/07/2004 |
| 6735790 | Vent stack screen for portable toilet holding tanks A vent stack screen for portable toilet holding tanks is provided in the form of a cap designed to fit over the open end of an open air vent stack extending from the holding tank through the roof of a portable toilet. The cap is constructed from a tubular sleeve of ... | 05/18/2004 |
| 6431972 | Multiple plumbing vent apparatus An apparatus for venting several plumbing pipes through existing roof openings made for existing ventilation systems, including turbine ventilators, roof ventilators, ridge ventilators and hip ventilators. The plumbing vent apparatus has two sides, a bott... | 08/13/2002 |
| 6374425 | Sewer system ventilation cap A durable, rotating, water-diverting, small animal and insect entry-prohibiting sewer system ventilation cap is that eliminates the influx of water into it.... | 04/23/2002 |
| 6363542 | Toilet ventilator A toilet ventilation apparatus which can either be attached to an existing toilet in a structure as an after market product or manufactured in combination with a toilet. The toilet ventilator draws odors directly from the toilet bowl through an intake duc... | 04/02/2002 |
| 6202226 | Portable waste odor collection apparatus A portable apparatus which works in conjunction with an existing ceiling exhaust intake to more directly and selectively intake waste odor emanating either from a bed pan, or from a toilet having a conventionally mounted hinged toilet seat. The waste odor... | 03/20/2001 |
| 6122870 | Stack ban A stack ban for sealing a pipe and boot extending from a roof of a building is disclosed. The stack ban includes a band of flexible material having a smooth inner surface and an outer surface. The inner surface has a circumference substantially equal to a... | 09/26/2000 |
| 5890960 | Venting system for structures using a ridge vent A venting system for structures using a ridge vent for venting a conventional exhaust system associated with a structure through a conventional ridge vent. The venting system includes a ridge vent adaptor, which defines a mounting head at an upper end, an... | 04/06/1999 |
| 5671484 | Toilet ventilator apparatus A toilet ventilator apparatus including a toilet seat with an odor collection channel formed therein. Such channel terminates at an evacuation nozzle. Also included is at least one odor collection vent which is adapted for receiving unpleasant odors from ... | 09/30/1997 |
| 5630233 | Vehicle toilet vent apparatus A tank ventilation exhaust fan having the unique ability to provided positive exhaust on a continuous basis while diluting the contaminated air and vapors, being emitted by the tank, with fresh air at a ratio in excess of five to one. A mixing chamber wit... | 05/20/1997 |
| 5299327 | Sewer ventilator system for recreational vehicles, boats and the like An automatic forced air ventilation system for recreational vehicles, railroad cars or the like designed to be operated during commode flushing The system creates negative pressure in the holding tank to prevent obnoxious odors from back-flowing into the ... | 04/05/1994 |
| 5299326 | Vehicle toilet vent apparatus The disclosed invention describes a vehicle waste tank ventilation exhaust fan, having the unique ability to provided positive exhaust on a continuous basis while diluting the contaminated air and odor being emitted by the waste tank with fresh air at a r... | 04/05/1994 |
| 5214266 | Electric heating rod attachment insertable into roof exhaust end of sewer vent pipe to prevent clogging from ice or snow accumulation An electric heating attachment for electrically heating the exterior portion of a sewer vent of a building to keep the vent from clogging from snow and/or ice and frost that may accumulate on the building roof. The attachment has an elongated rod insertab... | 05/25/1993 |
| 4993083 | Ventilated toilet A self-ventilating toilet is provided with an air intake chamber superposed above a water discharge chamber. A tubular member leading to the water discharge is vertically disposed and extends through the air intake chamber and is provided with apertures t... | 02/19/1991 |
| 4974632 | Automatic air valves for ducts An automatic air valve for a conduit, through which passes fluids and/or solids, which valve utilizes a freely-movable valve member to prevent the discharge of contaminated air therefrom into the environment and to permit the introduction of fresh air fro... | 12/04/1990 |
| 4922557 | Outdoor toilet holding tank ventilation system The waste material holding tank located within a portable, outdoor toilet cabana is vented to atmosphere by a vent pipe extending upwardly from the tank to the roof of the toilet cabana. A small, electrical blower fan is mounted upon the upper, open end o... | 05/08/1990 |
| 4901715 | Apparatus and method for breathing through the soil-stack during a high-rise fire Apparatus for establishing gaseous communication between a room of a building, wherein said room contains a toilet bowl, and a building conduit disposed within the building, said building conduit being in gaseous communication with the atmospheric gases o... | 02/20/1990 |
| 4524262 | Electrically heated sewer vent line defroster A plastic sewer vent line extending through the roof of a building is provided with a defroster for preventing blockage of the vent line by freezing and the consequent back-up sewage gas into the building. The defroster is located above the roof and inclu... | 06/18/1985 |
| 4232406 | Water closet ventilating system with vacuum breaker valve A system for ventilating the toilet bowl of a water closet of the type having a standpipe in the flush tank thereof and wherein the lower end of the standpipe is connected to the conduit which extends between the flush tank and the flush ring in the toile... | 11/11/1980 |
| 4200940 | Toilet seat volatile gas incinerator The invention describes a system for removing the odors associated with the bodily discharge of odorous volatile gases associated with the use by the human body of the toilet stool. A hollow toilet seat having radial holes associated with the centermost p... | 05/06/1980 |
| 4165544 | Odorless toilet stool A system for eliminating odorous air from a bathroom stool of the type including a toilet bowl, a water tank connected by a discharge pipe to the toilet bowl, the water tank including a vertical open top overflow passageway connected to the discharge pipe... | 08/28/1979 |
| 4007498 | Toilet ventilator including overflow-responsive sensor A ventilator for toilets is disclosed which includes an air duct to receive and remove the odorous air, an air suction device to establish the odorous air flow, a control for initiating and terminating the odorous air flow, and a sensor responsive to the ... | 02/15/1977 |
| 3938201 | Ventilator for a toilet bowl Ventilator apparatus to remove foul air and objectionable odors from a toilet comprising a vent duct manifold molded into the rear portion of the toilet bowl rim and communicating with a laterally extending coupling. The coupling communicates with a vent ... | 02/17/1976 |
