Segmented Patents (Class 277/521)
  • Patent number: 8622367
    Abstract: A valve packing assembly for a control valve includes a seal assembly, a loading assembly, and a packing retainer. The seal assembly has a seal component to provide a fluid seal around a valve stem and an anti-extrusion component to substantially prevent extrusion of the seal component about the valve stem. The loading assembly is configured to advantageously provide a predetermined packing stress to the seal assembly that is in the same direction as a process stress applied to the seal assembly by a process fluid, thereby substantially reducing packing friction and packing wear in the control valve assembly.
    Type: Grant
    Filed: May 12, 2011
    Date of Patent: January 7, 2014
    Assignee: Fisher Controls International LLC
    Inventors: Michel Ken Lovell, Ted Dennis Grabau
  • Patent number: 8613423
    Abstract: Methods and apparatus to load a valve packing are described. An example apparatus to load a valve packing includes a load assembly having a biasing element disposed between a valve packing flange and a stop flange to provide a load to a seal assembly. The packing flange is adjustable relative to the stop flange to adjust the load to be applied to the seal. A first guide member coupled to the packing flange or the stop flange provides a first predetermined distance between the packing flange and the stop flange. The first guide member provides an indication of a first predetermined load to be provided by the load assembly when the packing flange and the stop flange are spaced at the first predetermined distance provided by the first guide member.
    Type: Grant
    Filed: August 4, 2009
    Date of Patent: December 24, 2013
    Assignee: Fisher Controls International LLC
    Inventors: Wilbur Dean Hutchens, Randall Scott Collison, Loren Lee Bovee, David Charles Stanze
  • Publication number: 20130292910
    Abstract: Compression between two blocks (5, 6) forming a dynamic seal (13) between a rotor (2) and a stator (1) is applied by an inflatable seal (7) located in a groove. When blocks (5 and 6) must be cuttable, in other words divided into two parts to be assembled around the shaft (2), the originally linear seal (7) is wound in the groove and its ends are in contact with each other. It applies a uniform compression around the circumference and its placement does not require major disassembly of the equipment.
    Type: Application
    Filed: October 25, 2011
    Publication date: November 7, 2013
    Inventors: Grégory Tocheport, Jean-Jacques Darque, David Lombard, Stéphane Guignard, Laurent Guimet, Bruno Rouchouze, Jean-François Juliaa
  • Publication number: 20130127121
    Abstract: A locking collar to be inserted into a cylindrical cavity or lumen of a device for securing mechanical elements from moving axially within the cavity. The collar includes two semi-circular cylindrical segments hinged together with an opposed single slit to allow easy installation within the cavity and pushed into position against the installed elements without the need to disassemble a device. The collar is a substantially cylindrical rigid member with an outer diameter closely matching the inner bore diameter of the cavity and includes an opening at the slit to receive a securing screw member to urge the two segments apart to engage the inner bore surface of the cavity and fix the collar in place thereby locking the elements in place.
    Type: Application
    Filed: November 22, 2011
    Publication date: May 23, 2013
    Applicant: SEAL RYT CORP.
    Inventors: MICHAEL F. HUARD, Mark R. Wilkinson
  • Patent number: 8100407
    Abstract: A package cartridge is provided for use in the maintenance of a packing bore for a plunger-type pump. According to one aspect, a packing cartridge includes: a generally-cylindrical sleeve adapted to be at least partially positioned in the packing bore, a first abutment ring positioned in the sleeve, and a second abutment ring positioned in the sleeve and co-axially spaced apart from the first abutment ring. Telescoping structures are operatively positioned between the first abutment ring and the second abutment ring. According to another aspect, a structure forming a circumferential pressure-ring groove is provided. A pressure ring is positioned in the pressure-ring groove, the pressure ring having at least one smaller external dimension than an internal dimension of the pressure-ring groove, whereby at least one clearance is provided between the pressure-ring groove and the pressure ring. These aspects can be advantageously practiced together.
    Type: Grant
    Filed: March 11, 2004
    Date of Patent: January 24, 2012
    Inventors: Eddie N. Stanton, Michael L. Strickland
  • Publication number: 20080272555
    Abstract: A dynamic seal assembly for a rotating member comprising a first split housing carrying a first split seal, a second split housing carrying at least one second split seal, each split seal being resiliently closed so that sealing contact is maintained when the rotating member wobbles. The free ends of the second split seal overlap with one another in either a side-by-side relationship or an over-under relationship, or both.
    Type: Application
    Filed: May 3, 2007
    Publication date: November 6, 2008
    Inventors: James E. Taylor, Milton R. Hertel
  • Patent number: 5772218
    Abstract: A gland seal assembly for a slurry pump comprising a main body having a bore therethrough for receiving a rotatable shaft, a packing receiving zone within the bore, the packing including at least two packing rings and a packing sleeve surrounding the packing rings and arranged so that axial compression of the packing sleeve can be translated at least in part, to radial compression of the packing rings.
    Type: Grant
    Filed: December 12, 1996
    Date of Patent: June 30, 1998
    Assignee: Warman International Limited
    Inventor: Kevin Edward Burgess