Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 7204689 | Seal structure of solid feeding screw, and method of manufacturing reduced metal using the seal structure A sealing structure for a solid-transferring screw installed inside a heating furnace such as a material-leveling screw and a product-discharging screw, the sealing structure enabling the solid-transferring screw to be lifted during operation while airtightness of t... | 04/17/2007 |
| 7147230 | Sealing device and sleeve and holding element for such The sealing device is for drum filters or filter presses to form a seal between the rotary drum end faces and the end faces of the trough in which the rotary drums are situated. A sealing element (3) is disposed in a groove (1) on the rotary drum end f... | 12/12/2006 |
| 7007955 | Dryer seal A dryer seal. The seal is formed from an elongate multi-layer structure having a strip of fibrous material folded upon itself to establish a folded perimeter edge and a pair of outwardly projecting portions projecting away from the folded perimeter edge. A fibrous i... | 03/07/2006 |
| 6866270 | Sealing device for cylinder bearings A C-section ring fixed on a steel-mill roll and coaxially surrounding its stub has inner and outer axially extending legs defining an axially open cavity. The inner leg is tapered away from the roll and is formed adjacent the free end with a radially outwardly open ... | 03/15/2005 |
| 6663109 | Rotating fluid seal A rotating seal assembly, comprising: a first member having a circular hole passing therethrough; a second member having a circular shape, the second member being positioned such that an annular gap is present between the first and second members; a conta... | 12/16/2003 |
| 6585271 | Seal member, assembly, and method A seal assembly and method according to which a plurality of seal members are provided, each of which is formed by a strip of material having two interlocking portions. One of the interlocking portion of each seal member interlocks with one interlocking p... | 07/01/2003 |
| 6418637 | Method of sealing a rotary drum connection A sealing arrangement is provided between a rotary drum kiln and the stationary end thereof arranged in a material flow relation to each other, having enhanced effectiveness and requiring less maintenance. Pressurized gas, such as air, is fed to the conne... | 07/16/2002 |
| 6119969 | Mill trunnion seal spacer in coal-burning utility electrical power generation plant A coal-burning utility electrical power generation plant includes a mill provided by a rotary drum for pulverizing coal. The drum is rotational about an axis and has mill heads at distally opposite axial ends thereof. Each mill head has a cylindrical mill... | 09/19/2000 |
| 6065756 | Flex seal for gas turbine expansion joints An expansion joint seal between a gas turbine exhaust duct and an axially adjacent exhaust ductwork comprising plural layers of axially adjacent layers of flexible seal plates, each layer comprising a plurality of arcuate segments which together form a 36... | 05/23/2000 |
| 6003874 | Apparatus for sealing rotary tubes An apparatus for sealing a rotary tube drum of a furnace to another furnace component. Two concentric resilient metal ring segments are provided on a disk to comprise the sealing elements of the present invention. A plurality of springs arranged as a ring... | 12/21/1999 |
| 5992295 | Slide unit The slide unit includes a rodless power cylinder having a cylinder tube. End caps are attached to both ends of the cylinder tube. A slit extending in parallel with the axis of the cylinder tube is formed on the wall of the cylinder tube. A piston is dispo... | 11/30/1999 |
| 5906435 | Particulate drum mixer with scoop section and seal assembly with bladder A rotary drum mixer mixes product matter in a particulate form. A scoop section for the mixer has scoop blades which are radially enclosed by a peripheral wall which rotates with the drum. A stationary hood includes an outer face portion which covers the ... | 05/25/1999 |
| 5769428 | Device for sealing a hood that protects a tumbling barrel A device for oil-impermeably sealing a stationary hood (6) off from a rotating, tumbling barrel, containing at least one stationary packing cord (7) which is forced against a race (8) by a pre-stressed and compressed gasket (9). The race is part of the ba... | 06/23/1998 |
| 5571269 | Rotary seal assembly for rotary drum An improved rotary seal assembly for kiln drums and the like utilizes a series of overlapping metal leaves mounted to a hood surrounding the drum and a wear ring resiliently supported to surround the drum at an annular spacing from its outer surface. Wear... | 11/05/1996 |
| 5567380 | Rotary retort heat treating furnace seals The present invention provides a seal ring assembly for sealing a discharge end of a rotary retort heat treating furnace. The furnace contemplated by this invention has an outer furnace shell, a retort chamber, a rear plug, a cone casting, and a support r... | 10/22/1996 |
| 5511795 | Combined segmented and pneumatic seal for drum-type furnaces A sealing medium seal for sealing the rotary drum of a drum-shaped furnace against the stationary charging device and the downstream, stationary discharge chamber, in order to prevent infiltrated air from being drawn into the process space and toxic flue ... | 04/30/1996 |
| 5462290 | Seal means between a rotating cylinder and stationary chute A seal device between the infeed end of a rotating cylinder and the discharge end of a stationary chute wherein the discharge end of the stationary chute is received within an opening in the infeed end of the rotating cylinder. The seal device includes a ... | 10/31/1995 |
| 5383672 | Seal structure for rotary kiln An improved sealing structure for a rotary kiln utilized a leaf riding band attached to a truing flange on the kiln's rotating hopper using a plurality of clamps connected to a radial flange on the leaf riding band. The clamps hold the truing flange and r... | 01/24/1995 |
| 5265447 | Drum washer sealing A drum washer has improved seal performance by providing a sealing body carried by the drum of a highly corrosion resistant material. The sealing body is preferably polytetrafluoroethylene or titanium, and is connected by mechanical fasteners, instead of ... | 11/30/1993 |
| 5263724 | Segmented seal for rotary equipment A sealing assembly for effecting a rotary seal between a stationary housing (5) and a rotary drum (1) by a number of arcuate sealing segments (8) engaging a radial sealing surface (6) on the housing (5) and a non-radial sealing surface (3) on the rotary d... | 11/23/1993 |
| 5194153 | Apparatus for sealing a center valve vacuum filter A seal for a rotating center valve vacuum filter drum has a non-flat cross section with an elastomeric core and a chemical resistant sheathing. The seal is installed under tension so that, as wear occurs during operation, positive sealing contact is maint... | 03/16/1993 |
| 5106105 | Rotary kiln seal A rotary seal used to prevent the escape of contaminates from a rotating kiln incinerator. The rotating seal combines a rotating disc plate which is attached to the rotating kiln shell and four sets of non-rotating carbon seal bars housed in a primary and... | 04/21/1992 |
| 5091084 | Retaining seal and supporting screen system for drum centrifuge A filter apparatus has a drum rotatable about an axis and having a foraminous outer wall with an inner surface, a support screen lying directly on the inner surface, a filter mesh lying directly on the support screen, and a protective screen lying on the ... | 02/25/1992 |
| 5022852 | Rotary kiln With this rotating cylinder driven on the outer periphery and running on rollers with pipes or connections that are provided in the area of the rotating cylinder heads connected to the rotating cylinder ends for product intake, product gas removal, and so... | 06/11/1991 |
| 5000462 | Sealing assembly for a ball mill pulverizer A seal assembly for a rotating drum in which a rotating member is secured relative to the drum for rotation therewith. An air chamber is provided adjacent the drum for introducing sealing air into the drum. At least one seal ring is secured to the rotatin... | 03/19/1991 |
| 4966471 | Trunnion bearing dust seal A seal assembly for a rotating drum in which a trunnion is secured relative to the drum for rotation therewith and is supported by a bearing assembly. At least one seal ring engages a shoulder of the trunnion in an area adjacent to the bearing surfaces of... | 10/30/1990 |
| 4961588 | Radial seal A heat resistent seal having a plurality of finger-like members (14) which press against the outer peripheral surface (23) of a rotating cylinder (16). The seal includes several seal sections (10), each comprising a thin spring steel plate (22) having a l... | 10/09/1990 |
| 4836412 | Continous loop flexible lip vacuum seal In a seed meter in which a vacuum source is coupled to the interior of a generally cylindrical housing in which a seed disk is rotatably mounted, a seal in the form of an endless loop is mounted within the housing so as to extend between an inner wall of ... | 06/06/1989 |
| 4836560 | Seal A seal for a housing with a housing wall enclosing a rotatable tubular body includes a first sealing ring concentrically surrounding and secured to the tubular body, the first sealing ring having a sealing surface disposed at a right angle to the axis of ... | 06/06/1989 |
| 4821536 | Rotating drum end seal The seal has particular use as a seal in vats having a rotatable drum. The seal prevents material from getting between the ends of the drum and adjacent vat inside surface.... | 04/18/1989 |
| 4811961 | Seal for rotating cylinders 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 with the stationary member, the seal comprising a series of partially overlapping members circumscribing the cylinder adjacent the sta... | 03/14/1989 |
| 4795572 | Replaceable trunnion seal The novel sealing means of this invention generally comprises a replaceable, annular-shaped sealing device having a substantially L-shaped radial cross-sectional configuration for effecting the indirect fluid-tight sealing of an entry passageway formed at... | 01/03/1989 |
| 4791980 | Sealing arrangement for air preheater A sealing arrangement for an air preheater for a fuel burning device includes both radial and circumferential seals. The radial seals include a set of flexible, foil-like metal sealing strips coupled to semi-rigid radial seal plates. The semi-rigid radial... | 12/20/1988 |
| 4673026 | Sealing arrangement for air preheater A sealing arrangement for an air preheater for a fuel burning device includes both radial and circumferential seals. The radial seals include a set of flexible, foil-like metal sealing strips coupled to semi-rigid radial seal plates. The semi-rigid radial... | 06/16/1987 |
| 4669200 | Bulkhead seal for clothes dryer A seal for use in clothes dryers and the like having a carrier web and a fibrous sealing web, wherein the fibrous sealing web has opposite edges thereof folded upon itself and stitched to form first and second loops and a first one of the loops has captur... | 06/02/1987 |
| 4650340 | Rotating drum end seal Apparatus for sealing an opening (12) in the end face (13) of a rotating drum (10), including a stationary backing plate (24), annular seal ring (20), surrounding the opening and extending in a sealing manner between the backing plate and the end face, re... | 03/17/1987 |
| 4502702 | Segmented seal for rotary equipment A seal assembly for effecting a seal between a stationary housing and a rotatable cylinder includes a plurality of arcuate segments radially disposed about the outer circumference of the cylinder. Each segment has an axial sealing surface defining a radiu... | 03/05/1985 |
| 4457520 | Device for sealing the gap between a rotary kiln and an inlet housing A device for sealing the gap between the inlet end of a rotary kiln and a stationary inlet housing. In this device a ring which is capable of sliding in the axial direction is supported on a stationary ring by at least one first annular sealing element, a... | 07/03/1984 |
| 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 |
| 4405137 | Metal leaf rotary seal for rotary drum A rotary seal seals a large, high temperature rotary drum to a stationary hood where the drum is mounted for rotation with respect to said hood. The seal is formed of a series of overlapping leaves of resilient metal disposed successively to encircle the ... | 09/20/1983 |
