| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 277408000 | Introduction, circulation, or removal of fluid | 12 |
| 20090140494 | Flow Inducing Ring For a Mechanical Seal - A flow inducing ring for a mechanical seal includes a body portion having a first edge face and a second edge face, and at least one first groove extending both axially and circumferentially in one direction across the body portion from the first edge face to the second edge face. At least one second groove extends both axially and circumferentially in an opposite direction across the body portion from the first edge face to the second edge face. Each of the first groove and the second groove includes an entry portion, configured to draw a barrier fluid into the groove from the first edge face, and an exit portion, that is configured to expel barrier fluid from the groove to the second edge face and to impede the drawing of barrier fluid into the groove from the second edge face. | 06-04-2009 |
| 20090302546 | Mechanical seal device - A mechanical seal device has a stationary seal ring having a seal surface; a rotating seal ring having a facing seal section capable of being in intimate contact with the seal surface while facing it; a fixation section for sealingly holding the rotating seal ring and sealingly held by a rotating shaft; a seal part placed more on the machine exterior side than a mechanical seal and sealing between a seal cover and the rotating shaft; and a fluid chamber for containing lubrication liquid and formed between an intimate-contact surface, which is between the seal surface and the facing seal surface, and the seal part. The fluid chamber side of the seal surface or of the facing seal surface is formed in a lubrication region surface and the machine interior side is formed in a self-lubrication region surface. The mechanical seal device further has, in the lubrication region surface, an introduction opening for introducing the lubrication liquid, and an annular bloking groove formed in the self-lubrication region and blocking the lubrication liquid from the lubrication region surface. | 12-10-2009 |
| 20110169225 | MECHANICAL SEAL ASSEMBLY WITH INTEGRATED HEAT TRANSFER UNIT - The invention relates to a mechanical seal assembly, comprising a first stationary seal ring ( | 07-14-2011 |
| 20110227290 | FLOW INDUCING RING FOR A MECHANICAL SEAL - A flow inducing ring for a mechanical seal includes a body portion having a first edge face and a second edge face, and at least one first groove extending both axially and circumferentially in one direction across the body portion from the first edge face to the second edge face. At least one second groove extends both axially and circumferentially in an opposite direction across the body portion from the first edge face to the second edge face. Each of the first groove and the second groove includes an entry portion, configured to draw a barrier fluid into the groove from the first edge face, and an exit portion, that is configured to expel barrier fluid from the groove to the second edge face and to impede the drawing of barrier fluid into the groove from the second edge face. The first and second grooves preferably have substantially constant cross-sections throughout the entirety of their lengths for enhanced uniform fluid flow. | 09-22-2011 |
| 20110278799 | SEAL RING - The invention provides a seal ring capable of stably leaking a sealed fluid from an inner peripheral face side. | 11-17-2011 |
| 20140117625 | SCOOPING HYDRODYNAMIC SEAL - A hydrodynamic face seal has a rotating first ring and a stationary second ring. The rotating first ring has an inner face. The stationary second ring has an inner face adjacent to the inner face of the rotating first ring. The inner face of the rotating first ring includes a groove having a fluid inlet portion and a hydrodynamic force generating portion. The fluid inlet portion of the groove has a depth greater than the hydrodynamic force generating portion of the groove. The fluid inlet portion has a minimum depth configured to create a higher pressure than a surrounding pressure around the rotating first ring, while not generating a hydrodynamic or hydrostatic force in the fluid inlet portion. | 05-01-2014 |
| 20140232070 | SHAFT SEAL APPARATUS - A pumping ring | 08-21-2014 |
| 20140353922 | PUMP SEALING DEVICE - Described is a device ( | 12-04-2014 |
| 20150369368 | SEALING DEVICE - A sealing device includes a pumping ring capable of increasing the flow amount of the fluid to be self-circulated, and thereby increasing the head. The pumping ring ( | 12-24-2015 |
| 20160010477 | COOLED SEAL ASSEMBLY FOR ARRANGING BETWEEN A STATOR AND A ROTOR | 01-14-2016 |
| 20160018004 | HYDRAULICALLY CONTROLLABLE MECHANICAL SEAL - A controllable mechanical seal for sealing a shaft rotatable relative to a housing of a device which manipulates a fluid, the seal including: (i) a first face element having a first face surface, wherein the first face element is adapted to rotate with the shaft; (ii) a second face element having a second face surface, wherein the second face element is adapted to be supported within the housing; wherein the first face surface and the second face surface define a gap between the surfaces, physical dimensions of the gap contributing to defining a leakage rate of the fluid through the gap; wherein at least one of the first face element or the second face element includes at least one cavity wholly contained within the face element, the at least one cavity adapted to contain a hydraulic fluid; and wherein the at least one cavity is in fluid communication with at least one hydraulic intensifier and at least one pressure control valve, the at least one hydraulic intensifier being in pressure communication with a source of pressure; (iii) a sensor adapted to generate a signal indicative of the leakage rate; and (iv) a controller responsive to the signal for generating an output; wherein a state of the at least one pressure control valve is adapted to change in response to the controller output in order to increase or decrease the pressure of the hydraulic fluid in the at least one cavity, thereby deforming one of the first face surface or the second face surface to adjust the leakage rate. | 01-21-2016 |
| 20190145523 | Hydraulically Controllable Mechanical Seal | 05-16-2019 |
