Did You Know...
...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!
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| Number | Title | Issue Date |
| 7189432 | Varying conductance out of a process region to control gas flux in an ALD reactor A deposition system includes a process chamber for conducting an ALD process to deposit layers on a substrate. In one embodiment, instead of varying the gas flux on a substrate in the chamber by controlling the flow of gas upstream of the process chamber, the gas fl... | 03/13/2007 |
| 7182346 | Multistage oil seal against different cutting fluids for a machine tool motor A multistage oil seal (4) includes a plurality of lips (7a, 7b, 7c) in a plurality of stages disposed around a motor shaft (1) of a machine tool along the axis of the motor shaft to protect internal members of ... | 02/27/2007 |
| 7055824 | Lip-type high pressure seal A high pressure shaft seal (10A) for use in a refrigerating machine wherein carbon dioxide is used as a refrigerant in lieu of “Freon”. The seal has a sealing lip (24A) made of a non-elastomeric polymer material such as nylon that has a small gas p... | 06/06/2006 |
| 6979002 | Sealing apparatus having sequentially engageable seals Advantageous seal systems (1500) are provided that include a barrier member movable relative (1504) to a shaft (1550) to allow sequential engagement of resilient seal members (1506), e.g., lip seals, with the shaft. Movement of the barrie... | 12/27/2005 |
| 5711533 | Oilfield stuffing box with polished rod alignment An oilfield stuffing box 10 employs mating flange plates 15, 16 with bolt holes appreciably larger in diameter than the bolts employed to hold the flange plates together, thereby permitting lateral displacement between the two flange plates. The lateral a... | 01/27/1998 |
| 5636849 | Translatable bearing stuffing box The invention relates to a diffuser (1), comprising a substantially cylindrical, vertical container (2), through which cellulose pulp is arranged to be transported, nozzle arms (6, 7) for delivering a fluid, such as washing liquid, to the pulp, concentric... | 06/10/1997 |
| 5636688 | Self aligning stuffing box for pumpjack units A self aligning stuffing box for a pumpjack unit of the type having a polished rod reciprocatingly extending therethrough and downhole to a pump located at the lower end of a borehole. The stuffing box has a main body that terminates in a tubing adaptor a... | 06/10/1997 |
| 5538080 | Self aligning stuffing box for pumpjack units A self aligning stuffing box for a pumpjack unit of the type having a polished rod reciprocatingly extending therethrough and downhole to a pump located at the lower end of a borehole. The stuffing box has a main body that terminates in a tubing adaptor a... | 07/23/1996 |
| 5343944 | Self aligning stuffing box for pumpjack units A self aligning stuffing box for a pumpjack unit of the type having a polished rod reciprocatingly extending therethrough and downhole to a pump located at the lower end of the borehole. The stuffing box is an annular main body having a tubing adaptor at ... | 09/06/1994 |
| 5234039 | Sealing device for fuel supply port of fuel tank for use in vehicles A sealing device for the fuel supply port of a fuel tank for use in vehicles includes a nozzle seal made of a rubber-like elastic material. The nozzle seal is provided in an annular groove formed in an inner peripheral surface of a fuel supply port guide ... | 08/10/1993 |
| 5123297 | Lubricant retaining device A resilient sealing device is provided for accommodating tolerance variations between a lubricant holding case and a hub member. The device has a sealing face including deformable lips which are urged toward the hub by a resilient column and deformable le... | 06/23/1992 |
| 5110142 | Valve stem oil seal A valve stem oil seal comprises a cup-shaped case engageable with the valve guide of a piston-type internal combustion engine in sealing relationship. A seal element has a radial flange portion disposed between a radial flange on the case and a support wa... | 05/05/1992 |
| 5058487 | Cylinder with radially movable rod A cylinder having a radially movable or pivoting rod slidably received in a floating gland disposed in a cavity or recess in an end cap of the cylinder. Preferably, seals are provided between the rod, gland and recess. Hence, the rod and gland can move ra... | 10/22/1991 |
| 4949983 | Multi plane articulating rod seal A rod seal for establishing a seal between an elongate rod and a housing wall around an enlarged opening in the wall through which the rod projects provides a close fitting sliding seal between the rod and the seal to accommodate longitudinal reciprocatio... | 08/21/1990 |
| 4944215 | Fluid actuated cylinder assembly with a floating cylinder head A fluid actuated cylinder assembly including a piston and piston rod and having a cylinder head capable of shifting in any direction throughout 360° along a plane perpendicular to the long axis of the cylinder. The piston and piston rod are rockable thro... | 07/31/1990 |
| 4795170 | Packing arrangement for sealing the surface of a rotary drum like object A packing arrangement for sealing the outer surface of a rotary, drum-like object, such as a washer used in manufacturing cellulose, with a non-rotating annular packing, which is most advantageously composed of one or several side-by-side packing fillets,... | 01/03/1989 |
| 4783088 | Sealing assembly for sealing an opening in a plate through which a shaft extends An arrangement for sealing an opening in a plate (1) through which a shaft extends, the plate separating the "wet" and the "dry" zones of a packing machine from each other. In packing machines great demands are made on the tightness and durability of such... | 11/08/1988 |
| 4712370 | Sliding duct seal A seal assembly 34 for forming an air seal around conduits or accessories 32 crossing aircraft engine bypass ducts 30. The seal assembly comprises a seal retainer plate 40, a seal plate 36 and a seal ring 44. The seal ring 44 has two opposingly sprung leg... | 12/15/1987 |
| 4674693 | Mill Grinding elements of a mill rotating inside a mill housing are sealed off relative to the mill housing by an isolating air chamber. The isolating air chamber is limited by sealing rings abutting against the mill elements and a sealing ring housing. The se... | 06/23/1987 |
| 4565915 | Travelling wire EDM apparatus provided with a wire support arm passed through the wall of a machining fluid tank A travelling wire EDM apparatus having a pair of support and guide arms for an electrode wire effecting a cut on an electrode workpiece mounted in a tank filled with machining liquid fluid and capable of being displaced along two directions, relative to t... | 01/21/1986 |
| 4560176 | Inverted cone stuffing box A stuffing box for use in oil and gas wells having improved sealing. A plurality of ring-like packing glands each has an outer surface defining an inverted frusto-conical shape and a bore therethrough also defining an internal inverted frusto-conical surf... | 12/24/1985 |
| 4480842 | Self-aligning stuffing box A self-aligning stuffing box for use with a drilling device having a rotatable drill shaft includes a packing gland having an opening therethrough sized for passage of the rotatable drill shaft and includes packing rings for forming a seal between the pac... | 11/06/1984 |
| 4474379 | Centrifugally-operated radially-translatable seal ring A radial shaft seal ring has a lip ring for sealing to a shaft for rotation therewith. A U-shaped recess extends around the lip ring. An extension portion of a reinforcing ring which delimits a space on one side thereof to be sealed contacts the U-shaped ... | 10/02/1984 |
| 4461486 | Piston rod scraper and breather assembly Scraper rings are known which are mounted in the back plate of a hydraulic cylinder to scrape a hydraulic piston rod. Known scrapers are not very suitable for applications where the piston rod is liable to movement and vibration e.g. in pneumatic pistons ... | 07/24/1984 |
| 4408768 | Gap adjusting eccentric pin for articulated seals of rotary kilns A seal for use in sealing an annular opening between a stationary member and a rotating cylinder telescopically arranged in the stationary member, the seal comprising an annular ring member circumscribing the cylinder adjacent the stationary member and cl... | 10/11/1983 |
| 4280707 | Seal for rotating cylinder such as kilns and the like A seal for use in sealing an annular opening between a stationary member and a rotating cylinder telescopically arranged in the stationary member, the seal comprising an annular ring member circumscribing the cylinder adjacent the stationary member and cl... | 07/28/1981 |
| 4258902 | Steering valve with annular sealing element for radial annular gap An annular gap between a valve shaft and the bore in a valve body of a steering control valve is dimensioned to accommodate relative eccentricity of parts and is sealed by a sealing gland having a rigid annular element rotatable with the valve shaft. The ... | 03/31/1981 |
| 4177997 | Floating seal A high pressure floating ring assembly includes a floating ring having a sealing surface thereon closely fit with respect to the outer diameter of a cylindrical shaft and wherein relative motion occurs between the inside diameter of the floating ring and ... | 12/11/1979 |
| 4147367 | Shaft seal for bearing housing The seal closing the end of a housing of a bearing supporting a shaft is radially positioned by the shaft. The radially outer section of the seal which is retained within an annular groove of the housing is radially movable within the groove to allow such... | 04/03/1979 |
| 4047858 | Stuffing box for high density screw pump and pump incorporating same An axially fixed, radially limitedly movable stuffing box assembly including mounting means therefor. The stuffing box is adapted to have means for continuously flushing its bushing during operational rotational movements of a shaft functionally engaged t... | 09/13/1977 |
| 4020910 | Sealing between relatively rotating members in boring apparatus A boring apparatus having a working member mounted for rotation on a lubricated bearing about a shaft member, the apparatus being of the type in which substantial radial and axial relative motion between said members occurs in response to radial and axial... | 05/03/1977 |
| 3941396 | Seal for rotating means There is disclosed sealing means for effecting a seal between two adjacent members, one of which rotates relative to the other, comprising a convoluted resilient metal ring bonded to an elastomeric support member; the convoluted wall of the ring provides ... | 03/02/1976 |
