Kirat K Shah

8186154, May 29, 2012

Oct 31, 2008

12/289695

Bryan Nelson - Lacon IL, US
Kirat Shah - Dunlap IL, US

Caterpillar Inc. - Peoria IL

F16D 31/02

60414, 60419, 60459

A hydraulic circuit is provided having a hydraulic actuator and a flow control valve. The flow control valve has a pressure adjusting element fluidly coupled to the hydraulic actuator and situated to affect a pressure of fluid being directed to the hydraulic actuator. The flow control valve also has an energy directing element operatively coupled to the pressure adjusting element and situated to be driven by the pressure adjusting element when the pressure adjusting element is selectively throttling fluid being directed to the hydraulic actuator.

8336856, Dec 25, 2012

Sep 30, 2008

12/241484

Bryan E. Nelson - Lacon IL, US
Viral S. Mehta - Peoria IL, US
Daniel L. Mikrut - Geneva IL, US
Kirat Shah - Dunlap IL, US

Caterpillar Inc. - Peoria IL

E21D 15/44

254 93R

The presently disclosed embodiment can be characterized as a threadless quick connect coupling release tool having a main body portion fixedly attached to a handle portion, and a head portion having two engagement projection fingers, the head portion being removably attached to the main body portion. An inlet port is coupled to the head portion.

20090196768, Aug 6, 2009

Feb 1, 2008

12/024795

Bryan E. Nelson - Lacon IL, US
Viral S. Mehta - Peoria IL, US
Kirat Shah - Dunlap IL, US

CATERPILLAR INC. - Peoria IL

F04B 27/00

417269

A pump assembly with a rotor adapted to rotate around a first axis and supporting outwardly projecting piston elements includes at least one drum plate adapted to rotate around a second axis in angled relation to the first axis. The drum plate supports outwardly projecting cup elements such that the cup elements mateably engage distal portions of corresponding piston elements. A curved surface support element is mounted in sliding relation along a rotatable shaft structure and operatively engages the drum plate. A biasing element urges the curved surface support element and drum plate away from the rotor.

20090274564, Nov 5, 2009

Apr 30, 2008

12/112475

Bryan E. Nelson - Lacon IL, US
Viral S. Mehta - Peoria IL, US
Kirat Shah - Dunlap IL, US

CATERPILLAR INC. - Peoria IL

F04B 27/22

417 53, 417271, 91506

A floating cup pump assembly incorporating a tilted swashplate structure with cup elements projecting away from either side of the swashplate structure. The swashplate structure is positioned between a first group of matedly engaged piston elements and a second group of matedly engaged piston elements. The piston elements rotate around a first axis and the cup elements rotate around a different axis causing the cups to reciprocate relative to the piston elements.

20090290997, Nov 26, 2009

May 23, 2008

12/154514

Viral S. Mehta - Peoria IL, US
Bryan Nelson - Lacon IL, US
Kirat Shah - Dunlap IL, US

F04B 1/22

417269, 91499

A method for reducing the flow pulsations in a tandem floating cup pump having an odd number of pistons includes determining a low noise net index angle that produces reduced flow pulsations relative to those produced when the net index angle is either zero or half the separation angle and offsetting a first rotating group relative to a second rotating group by the low noise net index angle. The net index angle is the sum of a piston index angle and the port plate index angle. The piston index angle is the angle between a piston from a first rotating group and an adjacent piston from a second rotating group whereas the port plate index angle is the angle by which a first port plate is offset relative to a second port plate.

20100028169, Feb 4, 2010

Jul 31, 2008

12/222040

Bryan E. Nelson - Lacon IL, US
Viral S. Mehta - Peoria IL, US
Kirat Shah - Dunlap IL, US

F04B 27/08

417273, 2988802

The present disclosure is directed towards a hydraulic device. The hydraulic device may include a rotor, a plurality of piston members extending from the rotor, and a plurality of piston sleeves receiving the plurality of piston members. Each piston sleeve may have a piston receiving end and a piston sleeve axis. The hydraulic device may further include a plate component supporting the plurality of piston sleeves. The plate component may have a plate component axis. The hydraulic device may also include an alignment component having a plurality of arms spaced in a non-contact relationship with a piston receiving end of a respective piston sleeve when the plate component axis is parallel with the piston sleeve axis of the respective piston sleeve.

20100050627, Mar 4, 2010

Aug 29, 2008

12/230528

Bryan Edward Nelson - Lacon IL, US
Kirat Shah - Dunlap IL, US

F15B 13/02

60489

A hydraulic circuit associated with a hydraulic actuator is provided having a reservoir situated to hold a supply of fluid and a pump situated to supply pressurized fluid to the hydraulic actuator. The hydraulic circuit also has a pressure intensifying valve fluidly connected to the reservoir and the hydraulic actuator. The pressure intensifying valve is situated to direct fluid to the reservoir while in a first position and direct fluid to the hydraulic actuator while in a second position. The hydraulic circuit further has a flow divider including a housing with an inlet fluidly connected to the pump, a first outlet fluidly connected to the hydraulic actuator, and a second outlet fluidly connected to the pressure intensifying valve. The flow divider also includes a first fluid transporting portion fluidly connected to the inlet and the first outlet and a second fluid transporting portion fluidly connected to the inlet and the second outlet. The flow divider further includes a first variable displacement actuator associated with the first fluid transporting portion. The first variable displacement actuator is situated to regulate a volume change associated with the first fluid transporting portion.

20100074767, Mar 25, 2010

Sep 24, 2008

12/236772

Bryan E. Nelson - Lacon IL, US
Kirat Shah - Dunlap IL, US

Caterpillar Inc. - Peoria IL

F04B 49/22

417292

A machine hydraulic pump system including at least one hydraulic pump driven to pressurize hydraulic fluid. A drain port is in fluid communication with an interior lubricating cavity of the pump. A selectively activatable flow control member is in flow-controlling relation to the drain port. The selectively activatable flow control member is adapted to move from a fluid containment condition to a fluid withdrawal condition prior to activation of the pump to at least partially evacuate lubricating liquid from the interior of the pump in response to the temperature of the lubricating liquid dropping below a predefined lower limit.