Did You Know...
...that to encourage use of his new invention, the shopping cart, market owner Sylvan Goldman hired fake shoppers to push the carts around his store in Oklahoma City? Seems his customers were reluctant to give up their hand-carried baskets.
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| Number | Title | Issue Date |
| 7871061 | Dual spreading link for gate valves The invention is a dual spreading link mechanism for application with gate valves. The invention also extends to gate valves employing the inventive dual spreading link. In one application to pendulum gate valves, a valve carriage assembly moves in a pendular manner... | 01/18/2011 |
| 7004453 | Pendulum valve with a full range of position control Embodiments of the present invention provide a pendulum valve with a full range of normal position control. The pendulum valve can include a valve housing having a flow channel, and a valve body that is movable within the valve housing between a fully open position ... | 02/28/2006 |
| 5269491 | High vacuum valve Presented is a vacuum valve having a metallic housing that may be mounted in a vacuum system in any attitude. The valve includes a "knife" edge seal formed on the interior of the metallic housing on one wall thereof, surrounding a port therein, and adapte... | 12/14/1993 |
| 4903937 | Isolation valve for vacuum and non-vacuum application An isolation valve includes a housing having a port and a seal plate for sealing the port. The seal plate is linked to a shaft which carries a guide frame. To close the port, a drive mechanism drives the shaft linearly in one direction. The seal plate fir... | 02/27/1990 |
| 4560141 | Vacuum gate valve A vacuum gate valve includes a spreading mechanism with an actuating member extending between first and second valve plates and movable transversely of the axis of the valve, and parallelepiped spreading members disposed between the first valve plate and ... | 12/24/1985 |
| 4491145 | Toggle gate valve A toggle gate valve having a double block and bleed retractable sealing configuration which utilizes accurately positioned steel inserts as trim assembly guide plates to permit a significant reduction in valve body machining. The valve body as well as rem... | 01/01/1985 |
| 4408634 | Gate stop valve A gate valve is disclosed having a casing with inlet and outlet apertures one of which has a valve seat. An actuator reciprocal transversely of the apertures is provided having two oppositely disposed faces. At least one plate member which serves as a val... | 10/11/1983 |
| 4327893 | Guillotine damper A guillotine damper for a duct is provided with a thrust frame upstream of the path of a blade that is movable into and out of an operative position in sealing engagement with a seat downstream of the blade path when the flow path is not obstructed by the... | 05/04/1982 |
| 4301993 | Gate valve A new and improved gate valve suitable for use with high pressure, high temperature corrosive fluids such as those developed in coal gasification processes, uranium enrichment and the like comprises a valve body having a flow passage with a pair of oppose... | 11/24/1981 |
| 4290580 | Gate valve A new and improved gate valve suitable for use with high pressure, high temperature fluids such as those developed in coal gasification processes and the like which comprises a valve gate assembly including opposed outwardly facing valve discs is bodily m... | 09/22/1981 |
