Bizarre Patents
A simulation environment for the sport of boxing utilizing a robotic machine interface system which carries a person.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7338049 | Self-cooling ferrfluid seal A self-cooling ferrofluid seal includes a housing having a housing case and an external pole piece integrally connected to the housing case where the housing case has a plurality of heat dissipating surfaces, a magnetic circuit within the housing formed in conjuncti... | 03/04/2008 |
| 7327828 | Thermal optimization of ferrofluid seals A hermetic sealing system includes a chamber enclosing a high vacuum and positioned within an ambient environment and a rotatable shaft having a first portion extending into the chamber and a second portion extending out from the chamber. A ferrofluid seal is positi... | 02/05/2008 |
| 7188840 | Magnetic fluidic seal with improved pressure capacity A magnetic assembly for a multistage magnetic fluid rotary seal has a shaft, an annular permanent magnet, at least one pole piece and a radial gap formed between the shaft and the pole piece. The shaft and the pole piece have a plurality of trapezoidal-shaped ridges... | 03/13/2007 |
| 7149323 | Speaker A speaker comprising: a magnetic circuit provided with a through hole, and a recess formed around the through hole for retaining a magnetic fluid. The speaker further comprises a bearing provided in the through hole and a shaft supported by the bearing to be movable... | 12/12/2006 |
| 7100923 | Magnetic fluid seal device A magnetic fluid seal device that increases a permissible value of eccentricity for two members to improve sealability and decreases a variation of quality by injecting a magnetic fluid before assembling of parts, that saves structural members to achieve thinning, a... | 09/05/2006 |
| 7090178 | Sealed rotary joint for turret rotator A rotatable payload support turret for operation in a potentially hazardous environment includes a fixed element attached to a vehicle or fixed structure and a rotatable element, supported for rotation with respect to the fixed element. The turret includes a camera ... | 08/15/2006 |
| 6899338 | Ferrofluid seal incorporating multiple types of ferrofluid A ferrofluid seal apparatus incorporating a multi-stage ferrofluid rotary seal adapted to provide a ferrofluid pressure-type seal about a shaft element extending between a first environment and a second environment, a first magnetic fluid disposed at one stage of th... | 05/31/2005 |
| 5876037 | Magnetic fluid sealing device A magnetic fluid sealing device for preventing magnetic fluid from flowing out or spattering under the influence of rotation of a rotatable shaft, thereby preventing contamination of the surroundings. The device includes a pole piece 1 formed with a step ... | 03/02/1999 |
| 5826885 | Magnetic fluid sealing device A magnetic fluid sealing device adapted to enable rotary motion to be coupled by a shaft between an ambient high pressure environment to a high temperature, low pressure environment. Gaps in the shaft are dynamically sealed by a magnetic seal which uses a... | 10/27/1998 |
| 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 |
| 5704613 | Methods for sealing and unsealing using a magnetically permeable solid-based medium Devices and methods employ a solid-based medium that serves as a magnetic sealant, a lubricant, a bearing, an electrical or thermal conductor, singly or in combination. Included are devices wherein the solid-based medium is retained in a selected position... | 01/06/1998 |
| 4527802 | Integral magnetic fluid centrifugal high speed gas seal and method A magnetic/centrifugal-fluid seal is characterized by a common region serving as both the magnetic gap for the magnetic seal and a fluid-receiving pool for the centrifugal seal. A magnetically permeable annular rotating member extends radially into an ann... | 07/09/1985 |
| 4506895 | Self-activating ferrofluid seal apparatus and method of use A low-cost, self-activating ferrofluid seal apparatus particularly useful as an exclusion seal with computer-disc-drive spindles, which seal apparatus comprises an annular, axially-polarized permanent magnet and first and second pole pieces in a magnetic-... | 03/26/1985 |
| 4478424 | Ferrofluid seal apparatus and method A ferrofluid seal apparatus and method, which ferrofluid seal apparatus comprises at least one ferrofluid seal about the surface of a rotatable shaft, the ferrofluid retained in a sealing relationship by magnetic flux from the ends of two pole pieces whic... | 10/23/1984 |
| 4455026 | Vee-shaped magnetic/centrifugal seal and method of operation A combined magnetic/centrifugal seal for a rotating shaft rotatably journalled within a housing. The rotating shaft has a generally circular cross section and at least one radially extending generally Vee-shaped cross section circumferential portion forme... | 06/19/1984 |
| 4444398 | Self-activating ferrofluid seal apparatus and method A self-activating ferrofluid seal apparatus and method, which seal apparatus comprises a permanent-magnet ring and a pair of pole pieces which form a cavity therebetween, and which seal apparatus includes magnetically permeable, extending elements in the ... | 04/24/1984 |
| 4407518 | Nonbursting multiple-stage ferrofluid seal and system A nonbursting ferrofluid seal apparatus and system which comprises an annular permanent magnet and annular first and second pole pieces, one end of the pole pieces defining a single-stage ferrofluid seal under one end of one pole piece and a multiple-stag... | 10/04/1983 |
| 4407508 | Single-pole-piece ferrofluid seal apparatus and exclusion seal system A single-pole-piece ferrofluid exclusion seal apparatus and exclusion seal system which comprises a single, annular pole piece to surround a shaft element to be sealed, and an annular permanent magnet secured to one surface of the pole piece in a magnetic... | 10/04/1983 |
| 4357024 | Ferrofluid rotary-shaft seal apparatus and method A ferrofluid rotary-shaft seal apparatus of extended seal life particularly adapted for use as an exclusion seal with a computer-disc-drive spindle, which seal apparatus comprises: an annular permanent magnet; first and second pole pieces, one end of each... | 11/02/1982 |
| 4357023 | Ferrofluid rotary-shaft seal apparatus and method A ferrofluid rotary-shaft seal apparatus of extended seal life, particularly adapted for use as an exclusion seal with a computer-disc-drive spindle, which seal apparatus comprises: an annular permanent magnet; first and second pole pieces, one end of whi... | 11/02/1982 |
| 4357022 | Ferrofluid rotary-shaft seal apparatus and method A ferrofluid rotary-shaft seal apparatus of extended seal life particularly adapted for use as an exclusion seal with a computer-disc-drive spindle, which seal apparatus comprises: an annular permanent magnet; first and second pole pieces of unequal width... | 11/02/1982 |
| 4357021 | Ferrofluid rotary-shaft seal apparatus and method A ferrofluid rotary-shaft seal apparatus of extended seal life particularly adapted for use as an exclusion seal with a computer-disc-drive spindle, which seal apparatus comprises: an annular permanent magnet; first and second pole pieces of unequal width... | 11/02/1982 |
| 4340233 | Ferrofluid seal apparatus A ferrofluid rotary-shaft seal apparatus of extended seal life particularly adapted for use as an exclusion seal with a computer-disc-drive spindle, which seal apparatus comprises: an annular permanent magnet; first and second pole pieces of unequal lengt... | 07/20/1982 |
| 4252328 | Self-activating ferrofluid seal and method A self-activating ferrofluid-seal apparatus for a memory-disc-drive shaft, which seal apparatus comprises a ring magnet and a pair of pole pieces which form a cavity therebetween, a closed loop of a plastic tubular container with ferrofluid positioned wit... | 02/24/1981 |
| 4252353 | Self-activating ferrofluid seals A self-activating seal is formed by inserting a magnetically permeable shaft into a module which comprises: a magnet, two pole pieces and a magnetic fluid. The module is so constructed that the magnet and pole pieces form a cavity for storing the magnetic... | 02/24/1981 |
| 4200296 | Ferrofluid centrifugal seal A ferrofluid centrifugal seal and method of sealing a rotatable shaft, wherein ferrofluid is retained in an O-ring-seal form at static and low speeds and is moved to a barrier seal in a passageway at high speeds.... | 04/29/1980 |
