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Chidambaram Raghavan Patents
Inventor:
Raghavan; Chidambaram
Address:
Kent, WA
No. of patents:
31
Patents:




Patent Number Title Of Patent Date Issued
D515675 Element for a superpressure static fluid seal February 21, 2006
7367789 Device for maintaining a static seal of a high pressure pump May 6, 2008
A pressure enclosure includes a first component having an opening, a second component coupled to the first component in a position over the opening, a third component positioned between the first and second components and covering the opening, and a load chamber defined by a space be
7331842 Contour follower for tool February 19, 2008
A contour follower includes a plurality of sensors spaced around a waterjet nozzle, each of the sensors being configured to measure a distance between a working surface and a first plane, perpendicular to a longitudinal axis of the nozzle. The sensors may include hall-effect sensors
6804459 Method and apparatus for changing the temperature of a pressurized fluid October 12, 2004
An assembly for changing the temperature of ultrahigh-pressure fluid as it flows through ultrahigh-pressure tubing includes several thermally conductive blocks. Each block has a first bore through which the ultrahigh-pressure tubing passes, and a second bore containing a source of he
6736407 Static fluid seals and seal assemblies for ultrahigh pressure fluid containment May 18, 2004
High-pressure static seals and pressure vessels with static seals for containing fluid at high pressures are shown and described. Embodiments of the invention allow a plug to be easily, manually inserted into and removed from the pressure vessel. A metallic ring in the seal is config
6305913 Pressure processing a pumpable substance with a flexible membrane October 23, 2001
An apparatus and method for pressure processing a pumpable substance, such as a pumpable food product or slurry. In one embodiment, the apparatus includes a pressure vessel having an inlet valve toward one end and outlet valve toward the other end. A flexible bladder is coupled between t
6158981 Method and apparatus for aseptic pressure-processing of pumpable substances December 12, 2000
Improved methods and apparatus for pressure processing of pumpable substances are shown and described. In one embodiment, the apparatus includes an inlet valve, an outlet valve, and a pressure vessel. The inlet valve has an inlet port, and is coupled to a source of a pumpable substan
6145845 Biased seal assembly for high pressure fluid pump November 14, 2000
A method and apparatus for biasing a seal assembly in a high pressure fluid pump. In one embodiment, the fluid pump includes a reciprocating plunger, a seal carrier disposed about the plunger, and a seal supported by the seal carrier and sealably engaged with the plunger. The seal may be
6113304 Coupling for high pressure fluid pump assembly September 5, 2000
A coupling for a high pressure fluid seal assembly is shown and described. The coupling includes a first member having first and second opposite ends and capable of motion along a first axis extending between the first and second ends. The first member has an engagement portion positione
6092370 Apparatus and method for diagnosing the status of specific components in high-pressure fluid pum July 25, 2000
A method and apparatus for diagnosing components in high-pressure pumps to indicate when a component of the pump head is malfunctioning and to identify the malfunctioning component. In one embodiment, a high-pressure pump head incorporating a diagnostic system in accordance with the
6086070 High pressure fluid seal assembly July 11, 2000
A high pressure fluid seal assembly is shown and described. The seal assembly includes a seal carrier having a bore through which a reciprocating pump plunger may pass, the seal carrier having a first annular groove concentric with the bore, and carrying an annular seal. The seal car
6019298 Ultrahigh-pressure fan jet nozzle February 1, 2000
A nozzle for producing an ultrahigh-pressure fluid fan jet is shown and described. In a preferred embodiment, the nozzle has an inner surface defined by a conical bore extending from a first end to a second end, thereby creating an entrance orifice and an exit orifice in the first and
5961053 Ultrahigh-pressure fan jet nozzle October 5, 1999
A nozzle for producing an ultrahigh-pressure fluid fan jet is shown and described. In a preferred embodiment, the nozzle has an inner surface defined by a conical bore extending from a first end to a second end, thereby creating an entrance orifice and an exit orifice in the first and
5942045 Hard coating removal with ultrahigh-pressure fan jets August 24, 1999
A method for removing hard coatings from an underlying surface is shown and described. In a preferred embodiment, a nozzle having a particular geometry is used in a high-pressure fluid system to produce an ultrahigh-pressure fluid fan jet. The fan jet is traversed across a surface to
5785582 Split abrasive fluid jet mixing tube and system July 28, 1998
An improved mixing tube for use in a high-pressure abrasive fluid jet system is shown and described. In a preferred embodiment, the mixing tube is provided by forming a first piece and a second piece, each piece having a length that is substantially equal to the length of the mixing tube
5730358 Tunable ultrahigh-pressure nozzle March 24, 1998
An improved and tunable ultrahigh-pressure nozzle for use in generating ultrahigh-pressure fluid jets is shown and described. In a preferred embodiment, a nozzle body is provided with a first conical bore that extends from an entrance orifice to an exit orifice, the bore transitionin
5564469 Erosion resistant high pressure relief valve October 15, 1996
A high pressure relief valve for use in a high pressure fluid pump is shown and described. In a preferred embodiment, a valve seat is provided with a tapered hole and with a conduit, the tapered hole and conduit being in fluid communication with each other and with fluid having a variabl
5512318 Method for preparing surfaces with an ultrahigh-pressure fan jet April 30, 1996
A method for uniformly roughening a surface through use of an ultrahigh-pressure fluid fan jet has been shown and described. In a preferred embodiment, an ultrahigh-pressure fan jet is generated by pressurizing a volume of fluid, and forcing the pressurized fluid through a fan jet no
5493954 Self-venting seal assembly February 27, 1996
A self-venting seal assembly for use in an ultrahigh-pressure pump is shown and described. In a preferred embodiment, a low-pressure seal is used to energize a high-pressure seal, the low-pressure seal having a "u" shaped cross-section, thereby creating a groove in a first end of the
5417607 Ultrahigh-pressure fan jet nozzle May 23, 1995
A nozzle for producing an ultrahigh-pressure fluid fan jet is shown and described. In a preferred embodiment, the nozzle has an inner surface defined by a conical bore extending from a first end to a second end, thereby creating an entrance orifice and an exit orifice in the first and
5381631 Method and apparatus for cutting metal casings with an ultrahigh-pressure abrasive fluid jet January 17, 1995
A method and apparatus for cutting metal casings with an ultrahigh-pressure abrasive fluid jet is shown and described. Examples of such casings include piles and conductors of offshore oil production platforms. In accordance with a preferred embodiment of the present invention illust
5380159 Pressure compensation device for high-pressure liquid pump January 10, 1995
A pressure compensation device for use in a high-pressure direct driven pump to control the output pressure of the pump is shown and described. In a preferred embodiment, the high-pressure pump has a valve assembly that selectively allows fluid pressurized by a reciprocating plunger to p
5380068 Deep kerfing in rocks with ultrahigh-pressure fan jets January 10, 1995
A method and system for cutting kerfs in rock is shown and described. In one embodiment, a single fan jet is mounted in ultrahigh-pressure tubing. In an alternative embodiment, a manifold in which two fan jets are mounted is coupled to a manifold in which two round jets are mounted, such
5337561 Ultra high pressure multiple intensifier system August 16, 1994
An improvement in a multiple intensifier system having two intensifier units with reciprocating piston assemblies to supply very high pressure water. When one of the piston assemblies travels faster than the other, so that these reached an end stroke position at the same time, there can
5316745 High pressure sterilization apparatus and method May 31, 1994
An ultra high pressure sterilizing apparatus and method comprising a cylinder and plunger assembly that operates on a power compression stroke where material to be sterilized is alternately pressurized and depressurized in the cylinder chamber. The cylinder and plunger assembly also
5228623 Airport runway cleaning method and apparatus July 20, 1993
An apparatus to remove rubber from airplane tires from an airport runway surface. there is a manifold arm which rotates at as high as two thousand five hundred rpms over the runway surface, with a plurality of water jets being discharged downwardly at a relatively high pressure (e.g. thi
5226799 Ultrahigh pressure poppet valve with low wear July 13, 1993
A low wear poppet valve in a high pressure reciprocating pump. Relative movement of the mating surfaces due to compressive distortion is eliminated. There is a valve seat having a flow passage and an upper mating surface, and a poppet element which sealingly abuts this. The flow pass
5078161 Airport runway cleaning method January 7, 1992
An apparatus to remove rubber from airplane tires from an airport runway surface. There is a manifold arm which rotates at as high as two thousand five hundred rpms over the runway surface, with a plurality of water jets being discharged downwardly at a relatively high pressure (e.g. thi
5014423 Method for forming a sealed coupling using a high pressure hose fitting with an O-ring type seal May 14, 1991
A high pressure hose assembly is manufactured wherein the nipple of the hose fitting includes an O-ring receiving groove formed about its periphery. The O-ring and groove are dimensioned so that the crimping of the fitting's outer sleeve causes the linear of the high pressure hose to
4858967 High pressure hose fitting and method for sealing high pressure hoses to fittings August 22, 1989
A high pressure hose fitting, and method for sealing the hose to a fitting, is disclosed for use with hoses of the type including a linear disposed about an axially extending passageway, and a reinforcement layer circumventing the liner. The liner is preferably pulled slightly beyond
4649963 Ultra-high pressure hose assembly March 17, 1987
An ultra-high pressure hose assembly capable of withstanding sustained internal fluid pressures exceeding 60,000 psi is disclosed herein and consists essentially of an innermost tubular core, a plurality of successive tubular layers and an outer containment sleeve. The innermost tubu


 
 
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