...In 1790, the cost to obtain a patent was between $4 and $5.
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 |
| 7011293 | Water-saving device for a faucet A water-saving device for a faucet includes a hose and a control assembly connected to the hose and adapted to be located upstream of the faucet. The control assembly includes a housing, a plunger, an operation unit connected to an end portion of the plunger, and a ... | 03/14/2006 |
| 6908071 | Self-closing faucet with shearing action A faucet includes a body having a main bore including an inlet and an outlet. A bonnet and spout are connected to the body. A stem includes a first portion inserted into the outlet of the main bore and a second portion that projects through the bonnet chamber to a d... | 06/21/2005 |
| 6899120 | Yard hydrant A yard hydrant has an elongated wet pipe with a plunger that seals against the inside of a well casing. Lifting a pivoting handle at the top of the wet pipe lowers the wet pipe which opens a normally closed supply valve. Pressurized water can then flow up the wet pi... | 05/31/2005 |
| 6776388 | Valve actuator with internal amplifying means A Valve actuator with integral amplifying means having multiple linkage arrangements able to amplify the force generated by an air signal acting on a flexible diaphragm, and to transmit this force amplified on to a lower compression spring and ultimately on to a sli... | 08/17/2004 |
| 6076804 | Hydraulic controlling valve A hydraulic valve for controlling the flow of a pressured liquid with a housing that has an inlet and an outlet with a pivotally mounted handle that actuated a valve stem member housed within an internal bore with a counter bore step surface. An O-ring me... | 06/20/2000 |
| 6036170 | Service valve heads which may be connected to soft drink bottles or the like Improvements in service valve heads which may be connected to soft drink bottles or the like, wherein a valve body is obtained, a liquid circulation channel being provided between the spout and the fishing tube, said channel having a check valve. The rod ... | 03/14/2000 |
| 6032922 | Fluid flow control valve and actuating mechanism A fluid flow control valve is provided comprising a valve seat inside a housing for defining a passage opening in the housing and a valve seal positioned against the valve seat for closing off fluid flow. A push rod extends from the valve seal and through... | 03/07/2000 |
| 5716039 | Actuating lever The actuating lever of this invention is intended for use with an air valve having a normally extending valve stem. The actuating lever has utility in many fields. One illustrated embodiment is described in association with an air valve in the waste remov... | 02/10/1998 |
| 5697120 | Wet/dry cleaner A suction tube assembly for a wet/dry cleaner comprising a suction tube (60), a shampoo delivery conduit (44,45) extending along the suction tube, a valve forming a part of the conduit and operating means (50) for the user to operate the valve whilst mani... | 12/16/1997 |
| 5362214 | Multi-vacuum release for pump A hand-held vacuum pump with an attached vacuum release valve is disclosed. The vacuum release valve is oriented so that the hand-held vacuum pump and the vacuum release valve can be operated with the same hand. The vacuum release valve is operated using ... | 11/08/1994 |
| 5033510 | Removable isolation baffle for wastewater conduit A conduit isolation baffle assembly designed to be installed in a conduit system such as a vent and wastewater system of a building. The flexible baffle is installed in a groove having a sidewall and seat formed in the interior surface of a conduit to iso... | 07/23/1991 |
| 5014963 | Valve apparatus for preventing leakage of a beverage In a valve apparatus comprising a controlling arrangement which is for controlling a flow of a beverage in a beverage path, the controlling arrangement comprises a valve member which is movable between an open and a close position for opening and closing ... | 05/14/1991 |
| 4925154 | Gate valve with supplemental actuator An improved gate valve having a body with a chamber and an inlet and an outlet extending therethrough into said chamber, a gate mounted for reciprocation in said chamber between open and closed positions, a pressure responsive actuator having a housing, a... | 05/15/1990 |
| 4889313 | Utility shutoff method and device A device for turning off valves for utilities such as gas and water from a remote location in the event of an earthquake or other emergency. The device has two spring loaded valve assemblies, each of which has a valve stem held away from a valve seat by a... | 12/26/1989 |
| 4871143 | Gate valve with supplemental actuator An improved gate valve having a body with a chamber and an inlet and an outlet extending therethrough into said chamber, a gate mounted for reciprocation in said chamber between open and closed positions, a pressure responsive actuator having a housing, a... | 10/03/1989 |
| 4773571 | Seltzer package, valve, poppet and spring A package (10) for dispensing a fluid (26) in the package under gas pressure has a biaxially oriented polyethelene terepthalate bottle (12) with a neck (14). A dispensing head (22) is attached to the neck (14). A normally closed valve (16) is mounted in t... | 09/27/1988 |
| 4549719 | Mechanical amplifying means for valves and other devices Mechanical amplifying means for valves and other devices which may be used to replace heretofore employed hydraulic jacks capable of transforming a small force traveling a great distance into a large force being motivated over a small distance, and where ... | 10/29/1985 |
| 4061250 | Depress button type sprayer A depress button type sprayer comprises a piston slidably inserted into a cylinder and provided with a liquid jetting nozzle, a lever for moving the piston into the cylinder against the force of a spring and a depress button for operating the lever.... | 12/06/1977 |