The first match was accidentally discovered in 1826 when John Walker scraped a stick with chemicals on the end against a stone floor.
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7299824 | Multiple-mode fluid valve A multi-position fuel valve includes a main body having an enclosed chamber with a number of inlet ports and an outlet port and associated seats in the chamber. Disposed inside the chamber is a revolving rotor that is connected to a selector handle located outside t... | 11/27/2007 |
| 6305462 | Door mechanism of automobile air conditioner A mix door (5) is arranged in air passages (10, 11) of an automotive air conditioning device. The mix door (5) is arranged to extend in a direction to shut an air flow blown from the upstream air passage (10) and swelled in a downstream direction with a p... | 10/23/2001 |
| 5009392 | Rotary air valve A rotary air valve for a motor vehicle air conditioning, heating and ventilation system has a spring biased floating valve mounted on a rotary valve frame. The floating valve is spring biased radially outward against the interior of the case so that arcua... | 04/23/1991 |
| 4609177 | Valve A three-piece angle stop valve comprises a valve body, resilient control sleeve and handle, with no separate fastening or sealing elements required. Inlet line pressure resiliently biases the side walls of the control sleeve and a circumferential sealing ... | 09/02/1986 |
| 4562994 | Valve Three-piece stop valves, in both angle and straight-through forms, are disclosed comprising a valve body, resilient control sleeve and handle, with no separate fasteners or sealing elements being required. The handle and control sleeve are retained within... | 01/07/1986 |
| 4548385 | Flexible seal for rotor valves A rotor valve has a set of sealing members or inserts positioned in longitudinal channels formed on the outer surface of a cylindrical rotor. A resilient O-ring snuggly engaged in a groove in the rear surface of each insert urges it against a surrounding ... | 10/22/1985 |
| 3981330 | Water mixing tap A fluid mixing valve comprises a body defining a cylindrical chamber having two spaced-apart inlets and an outlet spaced axially from the inlets, a valve closure element and a mixture control element in the chamber and a valve spindle connected to the clo... | 09/21/1976 |
| 3967811 | All plastic valve construction An all plastic valve construction wherein a removable cartridge contains all wearable seal surfaces. A hollow valve body member is threadedly received in an underbody member and provided with a plurality of separate and distinct sealing locations. The und... | 07/06/1976 |
| 3955598 | Distributing member having a resiliently backed lamellar skirt, for mixing valves A distribution member for mixing cocks, having the form of a lamellar skirt of an elastically yielding material cooperating with fluid passage ports, and having a backing of a compressed resilient material which exerts an elastical backing action substant... | 05/11/1976 |