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...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
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| Number | Title | Issue Date |
| 7379825 | Multifunctional electronic device for a mechanical seal and control and management process realised by such device A multifunctional electronic device for checking and managing the operating and diagnostic conditions of a mechanical seal. A method of controlling and managing the operating and diagnostic conditions of a mechanical seal. ... | 05/27/2008 |
| 7347423 | Arrangement in connection with mechanical seal An arrangement in connection with a mechanical seal includes at least two sliding surfaces pressing against each other, which are arranged to seal a gap between a rotating and a non-rotating machining part, and mechanism for providing a sealing fluid flow cooling th... | 03/25/2008 |
| 7329123 | Air-driven cutting device for medical treatment A dental cutting device has a head portion (10) which accommodates a rotary cylinder (20) for holding a cutting tool (22), and a turbine blade (21) mounted around and secured on the rotary cylinder (20). Air fed from an air-supply ... | 02/12/2008 |
| 7268453 | Axial magnetic bearing apparatus In axial magnetic bearing apparatus in which a rotary disc made of a magnetic material is fixedly attached to a rotating shaft, and electromagnets are disposed on opposite sides of the rotary disc so as to have suitable very small distances therefrom respectively, s... | 09/11/2007 |
| 7159873 | Shaft seal The present invention relates to a seal assembly for use in a rotary machine. The seal assembly comprises a first member and a seal carrier mounted to the first member by a mounting member, a second member spaced from the first member and a seal running member posit... | 01/09/2007 |
| 7134667 | Arrangement comprising a slinger associated with a shaft bearing and a gasket associated with a sealing gap A sealing arrangement for turbomachines with a shaft bearing, a throw-off ring and a shaft seal which is assigned to a sealing gap and has a seal housing wherein opposing faces of the throw-off ring and the seal housing form an annular gap for centrifuging out dirt ... | 11/14/2006 |
| 7082962 | Seal support system for maintaining barrier fluid pressure within a mechanical seal An intelligent seal support management system includes a device for automatically compensating for increased heat or decreased heat in a vessel. ... | 08/01/2006 |
| 7025542 | Guide device for workpiece machining head, machine having the same, and guide method There is provided a guide device for a machining head capable of machining a workpiece such as a cylinder head of an engine accurately, a machine having the guide device, and a guide method. At least one of guide posts formed in a guide post member has an air pressu... | 04/11/2006 |
| 6951105 | Electro-water reactor steam powered electric generator system An electro-water reactor steam powered electric generator system includes a steam boiler having water and steam chambers, a water intake pipe and a plurality of steam delivery pipes. An electric resistance heater is mounted under and around the boiler having power l... | 10/04/2005 |
| 6673201 | Top separator with intraseal for digester vessel in a pulp or fiber processing system A top separator assembly for a digester is disclosed comprising: a rotatable shaft for the top separator; a packing for the shaft; and a sealing ring operatively mounted to the shaft and having a nominal clearance with the pack box, said sealing ring moun... | 01/06/2004 |
| 6330790 | Oil sump buffer seal A buffer seal arrangement is provided for improved buffer sealing of oil sump seals in gas turbine engines. The buffer seal arrangement includes a three section labyrinth seal. Disposed between the first and second section is a buffer air supply annulus f... | 12/18/2001 |
| 6158967 | Barrier fluid seal, reciprocating pump and operating method A barrier fluid seal assembly is provided for a reciprocating rod, where the reciprocation of the rod is used to pump barrier fluid through a barrier fluid chamber. The rod has first and second seals, and the barrier fluid chamber is located between the s... | 12/12/2000 |
| 6155572 | Non-contacting mechanical face seal including fluid control system A mechanical seal for providing fluid sealing between a housing and a rotatable shaft includes a first seal ring having a first seal face and a second seal ring having a second seal face. The first seal face further has a first portion and a second portio... | 12/05/2000 |
| 6070880 | System for lubricating mechanical seals A mechanical seal combination includes a double mechanical seal and a barrier fluid pump system. A barrier fluid circulating pump 10 is coupled to rotatable shaft 3 so as to derive its motive power from the rotatable shaft. When the rotatable shaft is not... | 06/06/2000 |
| 6000701 | Labyrinth seal assembly and method A labyrinth seal system and method for sealing against the flow of a fluid along a rotating member according in which a fixed housing surrounds the rotating member and one or more sealing members extend from the housing and engage the rotating member for ... | 12/14/1999 |
| 5906374 | Dual seal barrier fluid leakage control method utilizing linearly displaceable member A method for controlling leakage of a barrier fluid from a dual seal assembly of equipment, such as a pump or valve, employs a barrier fluid supply arrangement connected to a barrier fluid chamber of the dual seal assembly, a pressure intensifier mechanis... | 05/25/1999 |
| 5799951 | Rotating sealing device A rotating sealing device for sealing between a wall separating two mediums under substantially different pressure and a rotatable shaft utilizes a combination of a liquid meatal seal comprising at least one liquid metal ring and a shield means which prev... | 09/01/1998 |
| 5746435 | Dual seal barrier fluid leakage control method A method for controlling leakage of a barrier fluid from a dual seal assembly of equipment, such as a pump or valve, employs a barrier fluid supply arrangement connected to a barrier fluid chamber of the dual seal assembly, a pressure intensifier mechanis... | 05/05/1998 |
| 5713576 | Gas lubricated barrier seal A double, back to back oriented mechanical end face seal arrangement for use in sealing pumps or other devices used in fluid transfer of toxic or corrosive fluid has an intermediate buffer fluid chamber into which a relatively inert gas, such as nitrogen,... | 02/03/1998 |
| 4913447 | Dynamic seal for rotor apparatus A dynamic seal is disclosed which prevents foreign material from entering the air bearing for a rotor apparatus. The rotor apparatus includes a housing, a generally cylindrical rotor disposed within the housing and having a shoulder, a fluid stream and a ... | 04/03/1990 |
| 4878676 | Seal-flushing in centrifugal-pumps, improved methods and apparatuses Disclosed is an improved method of centrifugal pump impeller-shaft seal-flushing; comprising the step of supplying pressurized seal flush fluid to a centrifugal pump impeller-shaft seal within an operating centrifugal pump: (a) axially, from the rear; (b)... | 11/07/1989 |
| 4565378 | Shaft seal with lip lifting in response to shaft rotation and gas pressure Apparatus for effecting a seal between a rotary shaft and its enclosure includes a sealing element having an elastic lip portion coupled to the shaft for rotation therewith and a sealing portion associated with the enclosure, the elastic lip portion formi... | 01/21/1986 |
| 4515512 | Seal for high pressure pump or the like A seal for the drive shaft of a gear pump for melted polymeric materials is provided, which includes a reduced pressure zone, a mechanical packing seal, and a liquid filled chamber positioned in succession along the drive shaft. The liquid is a solvent fo... | 05/07/1985 |
| 4460180 | Sealing of a shaft in a centrifugal pump and a method for effecting the sealing A sealing of a centrifugal pump shaft. When the pump is at rest, the sealing is effected mechanically between surfaces with the aid of loading means, a sealing surface and a packing, and when the pump is in operation, the sealing is effected by means of a... | 07/17/1984 |
| 4447063 | Shaft seal with positively magnetically controlled sealing gap In a shaft seal having a radial plane seal ring gap and comprising a seal ring rotating with a shaft, and a non-rotating seal ring mounted on a housing of the seal through an element which is elastically yielding in every direction and serves as a packing... | 05/08/1984 |
| 4328973 | Shaft seal with fluid pressure and spring bias A novel shaft seal suitable for use on agitator shafts and pump shafts such as those commonly found in industrial chemical process equipment, said seal comprising a conventional mechanical seal in combination with packing of a particular material of const... | 05/11/1982 |
| 4257617 | Shaft seal assembly A shaft seal assembly comprises contact seal rings which are inserted into a recess formed within labyrinth seal rings encompassing the shaft. The contact seal rings are adapted to be in sealing engagement with the shaft when the shaft is not rotating or ... | 03/24/1981 |
| 4193603 | Sealing system for a turbomachine A buffer fluid system for a turbomachine includes flow regulating means for regulating the quantity of buffer fluid flowing to a buffer fluid sealing region from an operating region receiving relatively high pressure fluid through a pressure reducing seal... | 03/18/1980 |
| 4189156 | Seal system for a turbomachine employing working fluid in its liquid phase as the sealing fluid A seal system for a turbomachine employing first fluid as a working medium and utilizing the same fluid in its liquid phase as a sealing medium. The pressure of the liquid sealing medium is maintained above the pressure of the working medium. The fluid is... | 02/19/1980 |
| 4103899 | Rotary seal with pressurized air directed at fluid approaching the seal A seal design which is particularly suited for use between the rotating and stationary components of a machine is disclosed. Various construction details which increase the resistance to the flow of a fluid medium across the seal from a region of higher p... | 08/01/1978 |
| 4078809 | Shaft seal assembly for a rotary machine A shaft seal system to prevent pressurized working substances contained within a rotary machine from escaping to surrounding areas of relatively lower pressure includes a first seal disposed between a high pressure region and a first region operating at a... | 03/14/1978 |
