Did You Know...
...that the video game, Pong, was invented by a guy who graduated at the bottom of his engineering class? Nolan Bushnell spent more time running the games at a local amusement park than he did on his studies at the University of Utah. His dreams of working for Disney's amusement empire were dashed when the company wouldn't hire him. Taking a boring job, Nolan daydreamed about electronic versions of popular games. He invented Pong, the first video game, and went on to found Atari Co.
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| Number | Title | Issue Date |
| 5618135 | Pile threading device for connecting sheet piles A pile threading device (14) for threading sheet piles (10, 12) and including a box-type frame or body (20) comprising a plurality of connected frame members. An upper slide (44) is mounted on body (20) for relative sliding movement and has a pair of oppo... | 04/08/1997 |
| 4351414 | Lubricant fitting A lubricant fitting (10) adapted to be detachably connected to a valve body (11). The lubricant fitting (10) includes an elongate body (12) that has a central bore (24) therethrough which has an intermediate bore portion (26) that joins opposite inner and... | 09/28/1982 |
| 4320779 | Push-type control valve for fluid actuator A pilot line-operated control valve (32) for an actuator (14) that operates a gate valve (12) in the main flowline (10). A slide valve (70) having a piston (76) on its inner end is mounted in a longitudinal bore (46) of the elongate valve body (40) for mo... | 03/23/1982 |
| 4313458 | Restricted movement valve seats for an expanding gate valve In an expanding gate valve, tangential pins (70) are received loosely in peripheral grooves (62) of floating valve seats (26) to prevent the seats from moving inwardly far enough to drag against a gate mechanism (32) which is collapsed for movement betwee... | 02/02/1982 |
| 4291768 | Packing assembly for wellheads A packing assembly is mounted in the annular space between a tubing hanger and a tubing head of a wellhead assembly. The packing is bottomed on a shoulder of the tubing hanger and energized after the tubing hanger has been fully seated within the tubing h... | 09/29/1981 |
| 4286614 | High temperature ball valve A ball valve includes a metal valve seat (36) carrying a relatively soft insert (40) which seals against a ported ball member (22). A packing ring (72) surrounding the seat is compressed between a spring loaded metal wedge (84) and a metal backup ring (66... | 09/01/1981 |
| 4270730 | Means to retain a valve stem A retaining device to hold a butterfly valve stem (26) in the valve body upon a shearing or breaking of the stem. The retaining device is mounted within a bore (38) in the valve body (12) beneath the stem packing and includes pins (44) extending from the ... | 06/02/1981 |
| 4266566 | Spring assembly for floating seat ring A spring assembly (56) for a floating seat ring (40) to urge the seat ring into sealing engagement with the movable valve member. The seat ring is mounted in an enlarged bore portion at the valve chamber and has an annular rear face in opposed relation to... | 05/12/1981 |
| 4261471 | Fabricated backstop for railway cars A fabricated backstop for an end-of car cushioning unit in a railway car. The backstop is composed of two plate members or pieces which are welded separately to the inside of a center sill. One backstop piece is a generally U-shaped vertical plate member ... | 04/14/1981 |
| 4258743 | Expanding gate valve having mechanically secured seats An expanding gate valve having seats (74) which are mechanically secured in place. The valve body has seat pockets which include undercut grooves (78) intersected by a cylindrical body cavity (24) to form a pair of openings (80) to each groove. Each valve... | 03/31/1981 |
| 4246928 | Restricted movement valve seats for an expanding gate valve In an expanding gate valve, tangential pins (70) are received loosely in peripheral grooves (62) of floating valve seats (26) to prevent the seats from moving inwardly far enough to drag against a gate mechanism (32) which is collapsed for movement betwee... | 01/27/1981 |
| 4247080 | Seal assembly for valves There is disclosed a seal assembly for sealing between the body of a valve and the closure member thereof, as well as a method for mounting the assembly within an annular groove with the body which surrounds the flowway through one side of the valve. The ... | 01/27/1981 |
| 4215746 | Pressure responsive safety system for fluid lines An electro-pneumatic or electro-hydraulic safety system for shutting in a well or the like in the event of unusual pressure conditions in the production line of the well. The safety system includes a pressure transducer (30) which senses the flowline pres... | 08/05/1980 |
| 4215749 | Gate valve for shearing workover lines to permit shutting in of a well A gate valve which is mounted on a wellhead assembly and which may be closed to shear off workover lines, macaroni tubing and other suspension members so as to quickly shut in a well under emergency conditions. The gate has a flow port which aligns with t... | 08/05/1980 |
| 4214778 | Holddown mechanism for a tubing hanger in a wellhead A mechanism for releasably holding down a tubing hanger received within a hanger bowl of a wellhead. Pins mounted for axial sliding movement in horizontal passages of the hanger bowl are forced inwardly by screws which are threaded into passages of the we... | 07/29/1980 |
| 4213480 | Manual override for hydraulic gate valve actuators A double acting manual override mechanism for the hydraulic actuator of a subsea gate valve, and a visual indicator device for indicating the gate position. The gate is normally held open by hydraulic pressure and is moved by a spring to a fail closed pos... | 07/22/1980 |
| 4209884 | Method of forming valve seats A method of forming a valve seat having a resilient plastic insert received in a serrated groove of the seat. The insert is inserted into the groove and is pressed therein with a power driven ram to effect cold flowing of the insert into serrations in the... | 07/01/1980 |
| 4209040 | Seal means for high pressure control valves A valve device consisting of a valve body with a bore slidably receiving a valving plunger (30, 34) and having openings (64, 68) spaced along the bore wall for carrying high pressure controlling or controlled fluid. Interposed between the openings is soft... | 06/24/1980 |
| 4207924 | Control valve for fluid actuator A control valve for a fluid actuator has a slide valve member mounted within a housing or body with an external knob on one end and a piston on the other end. The body has a central bore with an enlarged bore portion forming a valve chamber in which the p... | 06/17/1980 |
| 4208035 | Metal gate valve seat having a flexible front lip face seal A gate valve has annular metal seats mounted in seat pockets around the inlet and outlet passageways at the valve chamber. Each of the seat members has a front face which includes an outer seal surface around the outer perimeter of the seat and a flexible... | 06/17/1980 |
| 4202410 | Seal testing arrangement for wellheads An arrangement for testing a metal seal at a wellhead joint between a tubing head adapter for a tubing hanger. An inner sleeve is installed at the joint and extends within the adapter and within the hanger at a location spaced inwardly of the metal seal t... | 05/13/1980 |
| 4196750 | Push-type control valve for fluid actuator A control valve for a fluid actuator has a slide valve mounted within a housing with an external gripping knob on one end and a piston on the other end. A spring engages the piston and continuously urges the slide valve and knob to an outer position. The ... | 04/08/1980 |
| 4194529 | Control valve having integral visual indicator for fluid safety systems A control valve structure and combined visual indicator for controlling fluid and visually indicating the operating condition of a portion of a fluid system. The control valve has a slide valve mounted in a housing and biased toward a retracted position w... | 03/25/1980 |
| 4194524 | Valve chamber flushing system A system to flush the valve chamber of a valve (10) which is mounted in a flowline (12) by passing a cleaning fluid through the valve chamber when the valve is moved between open and closed positions. An actuator (38) operates a pair of flush valves (26, ... | 03/25/1980 |
| 4193577 | Expanding gate valve with axially flexed spring plate An improved spring plate (52) for insuring timely cooperation between the gate member (36) and segment member (38) of a linearly reciprocating gate assembly (34) which is expansible to seal the opposed seats of a gate valve. The two members have two pairs... | 03/18/1980 |
| 4193581 | Cage for gate valves and method of assembly A gate valve structure has a one-piece cage (76) in the form of an open ended sleeve which fits in the valve chamber of the body. The cage includes a pair of openings (82) which are aligned with the inlet and outlet flow passages in the body. Seats (60, 6... | 03/18/1980 |
| 4188014 | Gate valve with position responsive interlock An improved gate valve of the expanding type wherein a gate and segment assembly having cooperative wedge surfaces are moved linearly between a pair of valve seats to block the flow therebetween in one position and open the flow in another, the fluid flow... | 02/12/1980 |
| 4188016 | Spacer carriers for floating seats in gate valves A gate valve structure having a pair of opposed spacer carriers (72,74) fitting within the valve chamber in abutting relation to each other and spacing the floating upstream and downstream seats (60, 62) from each other a predetermined minimum distance. E... | 02/12/1980 |
| 4184504 | Wellhead valve removal and installation tool A tool for removing and replacing wing valves or master valves on an operating wellhead under pressure includes an elongated housing with a fluid coupling on one end for connecting to the outlet end of a wellhead valve and a packing assembly extending fro... | 01/22/1980 |
| 4179098 | Spacer plates for gate valve seat assemblies A gate valve having a gate assembly of the expanding type employing a gate element (34) and segment (36) with adjacent wedge surfaces to expand the gate mechanism in both open and closed positons. Opposed floating seat skirts (68) having integral seat ass... | 12/18/1979 |
| 4178665 | Method of making a fabricated gate valve A method of fabricating a gate valve having a hollow body with inlet and outlet conduits mounted therein and seat support members mounted on inner ends of the conduits includes fabricating and stress relieving a seat support assembly, then machining it to... | 12/18/1979 |
| 4177998 | Packing gland assembly A packing assembly for a valve shaft or stem (8) consisting of inner and outer telescoping expander sleeves or rings (44, 46) slidably received intermediately in a stuffing box (32) between two groups of elastomeric sealing rings (F, G). Semi-fluid plasti... | 12/11/1979 |
| 4177833 | Valves having a pressure equalizer across dual face seals A valve has upstream and downstream seat assemblies each having a pair of spaced annular face seals in concentric relation to form inner and outer face seals. A movable valve member (26, FIG. 2; 88, FIG. 8) has a main bore therethrough and is mounted in a... | 12/11/1979 |
| 4163544 | Two piece composite valve seal ring construction A valve seal includes inner and outer concentric seal rings located side by side in a groove with the inner seal ring against the groove inner wall and the outer seal ring against the groove outer wall. Interfitting surfaces are provided on the seal rings... | 08/07/1979 |
| 4162782 | Seal assembly for butterfly valve A butterfly valve has a valve body with an improved seal assembly mounted in the groove about a flow passage in the valve body. The seal assembly has an outer metal body including a pair of spaced inner legs having outer ends thereof in sealing contact wi... | 07/31/1979 |
| 4160460 | Fire-safe valve structure A fire-safe valve structure has a metal seat with an annular groove therein in which a resilient sealing ring is positioned in face-to-face contact with a valve member movable between open and closed positions. The annular groove has an annular space behi... | 07/10/1979 |
| 4157170 | Groove mounted resilient valve seat having deformable lip A valve has an annular seat member coaxially mounted in a groove in the valve body around the outlet passageway. The groove has parallel sides which are perpendicular to its bottom. The seat member has a lesser radial thickness than the groove and is moun... | 06/05/1979 |
| 4151855 | Ball valve assembly tools and method of using same The valve assembly tools include a longitudinally expandable member insertable between the seats in a ball valve to forcefully displace the seats into a retracted position in the seat pockets. Seat securing devices are temporarily mounted in the valve bod... | 05/01/1979 |
| 4147327 | Metallic seals for ball valve A ball or spherical plug valve has a pair of annular metallic seal rings mounted in grooves in the valve chamber around the inlet and outlet passageways of the valve body. Each metallic seal ring is of a one-piece generally uniform angled cross-section to... | 04/03/1979 |
| 4147183 | Valve using rolamite mechanism A curtain valve has a valve chamber having a pair of opposed walls with an inlet port through one wall and an outlet port through the other wall. A valve member has a tension band supported on opposite ends thereof in a valve body with the band being loop... | 04/03/1979 |
