KAPLESH KUMAR
Broker in Wellesley, MA

6571630, Jun 3, 2003

Jul 9, 2002

09/937268

Marc S. Weinberg - Needham MA
Kaplesh Kumar - Wellesley MA
A. Thomas King - Medway MA

The Charles Stark Draper Laboratory, Inc. - Cambridge MA

G01P 904

7350416, 73 137, 21912169

Dynamic balancing reduces quadrature bias in microfabricated vibrating instruments such as tuning fork gyros so that a purity of motion is achieved in the absence of any angular rate input. Balancing is achieved by ablating ( ) or depositing ( ) onto support structure ( ) for a tuning fork gyroscope rather than the proof mass ( ) itself by melting and moving material on a tuning fork beam ( ). Such adjusting is advantageously done during actual operation of the gyro by laser beam application through an encapsulating transparent cover which can be either part of the chip die or an external package.

4628809, Dec 16, 1986

Aug 5, 1985

6/762708

Dilip K. Das - Bedford MA
Kaplesh Kumar - Wellesley MA
Ernest C. Wettstein - Acton MA

The Charles Stark Draper Laboratory - Cambridge MA

B30B 1514

100208

Apparatus and method for forming radial orientation rare earth-transition metal magnets in continuous arc rings by hot isostatic pressing. A method includes the steps of compacting rare earth-transition metal powders having a particle size up to 40 microns into radially oriented rings in a mold provided with a radially aligning field, stacking a plurality of compacted radially oriented rings within an annular cavity within a sealed, evacuated canister to form a cylinder of a predetermined height, subjecting the canister to temperatures in the range of 900. degree. to 1150. degree. C. under a gas pressure of 15 kpsi to densify the compacts, and cooling the canister and the compacts to room temperature. An apparatus for performing the above-described method, includes a mold for forming green compacts having a central iron core or mandrel, as outer housing forming an annular space between it and the iron mandrel, plungers for compacting into a ring rare earth-transition metal powder within the annular space, and means for forming a radially oriented magnetic field. The magnetic field forming means includes a pair of electromagnetic coils with bucking fields disposed on opposite axial ends of the annular space.

4565686, Jan 21, 1986

Jun 13, 1983

6/502535

Kaplesh Kumar - Wellesley MA

The Charles Stark Draper Laboratory, Inc. - Cambridge MA

C01B 624

423644

A nonequilibrium state material, typically a rare-earth-transition metal, for reversible hydrogen storage. A rare earth-transition metal such as a rare earth cobalt alloy, like a samarium-cobalt or a lanthanum-nickel alloy, is provided in the amorphous or metastable crystalline state as a hydrogen absorbing material, particularly for use in a hydrogen storage and retrieval system, such as a fluidized bed or stacked plate hydrogen storage cell. The rare-earth-transition metal material is rapidly cooled from the liquid state to avoid the transition to a full crystalline state thereby obtaining an amorphous or quasi-stable crystalline state material which has the property of enhanced hydrogen storage capacity as well as being substantially immune to fracturing.

4264556, Apr 28, 1981

Aug 27, 1979

6/070147

Kaplesh Kumar - Wellesley MA
Dilip K. Das - Bedford MA

B22F 302, B30B 502, B30B 1100

264314

A method and apparatus for thermally isostatically densifying a sample, including placing the sample to be densified into a pressure vessel filled with a thermally expansive pressurizing medium with the medium intermediate the vessel and sample; and varying the thermal energy of the medium to cause it to expand and exert increased pressure to densify the sample.

5505865, Apr 9, 1996

Apr 14, 1992

7/869887

Kaplesh Kumar - Wellesley MA
Anthony Petrovich - Tewksbury MA

Charles Stark Draper Laboratory, Inc. - Cambridge MA

C04B 3526

252 6262

A process for synthesizing advanced ceramics having superior microstructures and properties. Metal oxide powder particles are produced from solutions of soluble salts of the respective metals by a spray decomposition process. The as-formed powders are heated in an inert atmosphere at a temperature below their sintering temperature and for a time sufficient to cause the oxide powder particles to densify without sintering, and the densified powder is then compacted under high pressure and finally sintered at a temperature above that employed in the initial heating step. Products of this process possess superior magnetic and structural uniformity, excellent grain structure, and very high mechanical strength relative to ceramics prepared without using a heat treatment for densification prior to the compacting step.

4441874, Apr 10, 1984

Nov 5, 1980

6/206877

Kaplesh Kumar - Wellesley MA
Dilip K. Das - Bedford MA

The Charles Stark Draper Laboratory, Inc. - Cambridge MA

B22F 300

425 78

Apparatus for the formation of a molded article from powders and powder compacts of a material by pressure compaction of the powders under the influence of a thermally driven differential volume expansion of first and second elements constraining the powders. The volume expansion achieves a trippling of the compaction effect.

4306907, Dec 22, 1981

Sep 12, 1980

6/136599

Byong-Ho Ahn - Wayland MA
Dilip K. Das - Bedford MA
Kaplesh Kumar - Wellesley MA

Charles Stark Draper Laboratory, Inc. - Cambridge MA

C22C 2500, C22C 3200

75150

Process for the formation of precipitation hardened beryllium-nickel, beryllium-iron, and beryllium-cobalt alloys and cermets for structural and bearing use respectively in precision instruments and such alloys and cermets. A beryllium-nickel, -iron, or -cobalt high solute solution at elevated temperature is rapidly cooled to provide a readily machined solid solution. After machining, the alloy is reheated to an intermediate temperature under controlled conditions where precipitation hardening occurs through limited precipitate cluster formation. A cermet is formed in the process with the addition of a ceramic material to the beryllium alloy in the initial steps.

4260582, Apr 7, 1981

Jul 18, 1979

6/058530

Kaplesh Kumar - Wellesley MA
Dilip K. Das - Bedford MA

The Charles Stark Draper Laboratory, Inc. - Cambridge MA

B29C 100

264111

Method and apparatus for the formation of a molded article from powders and powder compacts of a material by pressure compaction of the powders under the influence of a thermally driven differential volume expansion of first and second elements constraining the powders. The volume expansion achieves a trippling of the compaction effect.

5007972, Apr 16, 1991

Jun 9, 1988

7/204633

Kaplesh Kumar - Wellesley MA
Herbert A. Newborn - Marblehead MA

The Charles Stark Draper Laboratory, Inc. - Cambridge MA

H01F 108

148102

A process for fabricating high strength Sm. sub. 2 TM. sub. 17 (TM=transition metal) magnets is disclosed. An alloy is crushed and pulverized to a very fine powder. The powder is aligned in a magnetic field, cold pressed to substantially immobilize the powder particles and then compacted by hot isostatic pressing. The material is either homogenized at this time or prior to crushing. Thereafter, the powder is optimized by an aging heat treatment which includes isothermal exposure followed by controlled cooling. When aging is complete, the compact is magnetized.

4342734, Aug 3, 1982

Jul 20, 1981

6/284848

Kaplesh Kumar - Wellesley MA
Dilip K. Das - Bedford MA

The United States of America as represented by the Secretary of the Navy - Washington DC

C01B 3502

423298

A plasma-spray technique using rapid temperature quenching transforms commercially available. beta. -rhombohedral boron in powder form into thick, dense wafers of crystalline. gamma. -tetragonal boron.