Axially Spring Biased Patents (Class 277/508)
  • Patent number: 10119616
    Abstract: Disclosed is a device for regulating the compression force of a spring-spacer assembly provided in a mechanical shaft seal in a system including a motor and a pump or compressor. The device includes a spacer made from shape memory alloy, a spring in line with the spacer, and a heater proximate the spacer. When heated, the spacer contracts in length, resulting in a decrease in compression force. Also disclosed are systems and methods utilizing the device. The device is particularly useful when starting a pump or compressor to reduce friction in the mechanical seal. Existing mechanical seals can be easily retrofitted with the device.
    Type: Grant
    Filed: April 8, 2016
    Date of Patent: November 6, 2018
    Assignee: CHEVRON U.S.A. INC.
    Inventor: Baha Tulu Tanju
  • Patent number: 8690534
    Abstract: Arrangements for promoting the restriction of fluid flow along a shaft via providing a deformable ring member in an annulus between the shaft and housing. In an initial general condition, the deformable ring member permits free fluid flow in a general direction along the shaft while in a second, constricted condition, the deformable ring closes or blocks a gap or clearance normally conducive to free fluid flow to thereby restrict fluid flow. An actuation medium, which can take any of a very wide variety of forms, preferably promotes constriction of the deformable ring member directly or indirectly.
    Type: Grant
    Filed: June 8, 2009
    Date of Patent: April 8, 2014
    Assignee: Curtiss-Wright Electro-Mechanical Corporation
    Inventors: David Jeffrey Janocko, Charles David Bice
  • Publication number: 20120211945
    Abstract: A gas-proof sealing packing of a compressor includes a scraper recess on the crankcase-side end containing a gas-proof scraper ring, a sealing ring recess on the cylinder-side end containing a sealing ring arrangement (18), a barrier recess located axially between the scraper recess (15) and the sealing ring recess (17), and a drain line in the sealing packing that is connected with the space between the barrier recess and the scraper recess.
    Type: Application
    Filed: February 14, 2012
    Publication date: August 23, 2012
    Inventors: Tino LINDNER-SILWESTER, Christian HOLD, Christian KERNBICHLER, Andreas BRANDL
  • Patent number: 7883094
    Abstract: The invention is a sealing system that employs a unique array of offset components, including multiple seal rings, to provide an improved seal with enhanced functionality. In the preferred embodiment, a groove contains two canted-coil springs that are located in a side-by-side relation beneath a pair of expander rings that are also in a side-by-side relation. Located atop the expander rings are three seal rings that are similarly arrayed in a side-by-side relation. To prevent a leak path through the expander rings, a center one of the seal rings overlies the area between the two expander rings.
    Type: Grant
    Filed: August 19, 2008
    Date of Patent: February 8, 2011
    Assignee: Delaware Capital Formation, Inc.
    Inventor: Smail Vila
  • Patent number: 7163206
    Abstract: A jet pipe assembly containing at least one joint provided with a seal assembly to isolate, substantially, the fluid flowing in the pipe from the fluid external to the pipe. The dynamic member of the seal assembly is provided with both radial and cylindrical sealing surfaces.
    Type: Grant
    Filed: February 20, 2003
    Date of Patent: January 16, 2007
    Assignee: Cross Manufacturing Company (1938) Limited
    Inventors: Rodney Alan Cross, Paul Anthony Blanchard
  • Patent number: 7001159
    Abstract: An improved motor-driven pump is provided for delivering a flow of water in a swimming pool or spa environment or the like. The improved pump includes a motor mounted within a motor housing having a seal plate mounted at one end thereof. The seal plate carries a shaft bearing for rotatably supporting a drive shaft having an outboard end connected to an impeller disposed within a pump chamber defined cooperatively by the seal plate and a volute housing mounted thereon. A primary seal assembly includes an axially spring-loaded dynamic seal ring carried on the drive shaft for rotation therewith and for running engagement with a stationary bushing carried by the seal plate. A secondary seal assembly is positioned axially between the primary seal assembly and motor bearing, and includes at least one slinger disk for radially outwardly slinging any water leaking past the primary seal assembly through a vent chamber.
    Type: Grant
    Filed: January 13, 2005
    Date of Patent: February 21, 2006
    Assignee: Polaris Pool Systems, Inc.
    Inventors: David J. Peterson, Jr., Hassan Hamza, Kenneth A. Peterson, Jeffrey A. Wichmann
  • Patent number: 6354597
    Abstract: A rotating connection device forming a seal between an inner element (1) and an outer element (14) of larger diameter than the inner element, these two elements being co-axial, cylindrically symmetric and rotating in relation to one another. It comprises a shell (16) placed in the annular space between the two elements, at least a first ring-type seal (19) secured to the shell, placed between the latter and inner element (1), at least a second ring-type seal (23) placed between two opposite walls (22, 18) of shell (16) and of outer element (14), both perpendicular to the axis of rotation, and means (24-26) for pressing the two walls against one another by means of the ring-type seal with an adjustable application force. This connection device allows substantial motions between the two elements, radial as well as longitudinal. The device can be used: for example for connecting a pipe linking an outer device and the central part of the rotating ring gear of a heat exchange and/or incineration system.
    Type: Grant
    Filed: November 24, 1999
    Date of Patent: March 12, 2002
    Assignee: Institut Francais du Petrole
    Inventors: Dominique Garnier, Jean Morlec