Caterpillar Inc.

Shivangini Singh Hazari

Dana Ray Coldren

Joshua W Steffen

Daniel Raymond Baldwin

Alan Ray Stockner

Dennis Henderson Gibson

Robert Michael Campion

Sunil Jefferey Bean

Cory Andrew Brown

Sana Mahmood

Michael James Pollard

Adrienne M Brasche

Steven Charles Taylor

John Jay Truhan, Jr

Nikhil M Arya

A valve spool may include a cylindrical spool body having a spool longitudinal axis, a first spool body end wall and a second spool body end wall disposed axially opposite the first spool body end wall, and a spool outer surface. The spool outer surface may include a first spool guide region proximate the first spool body end wall and having a spool guide region outer diameter, a second spool guide region proximate the second spool body end wall and having the spool guide region outer diameter, and a spool tight clearance region disposed between the first spool guide region and the second spool guide region. The spool tight clearance region may have a spool tight clearance region outer diameter that is greater than the spool guide region outer diameter.

Edgeless valve spool design with variable clearance

A cryogenic fluid pump includes a plurality of pumping elements, each of the plurality of pumping elements having an actuator portion that is associated with and configured to selectively activate one end of a pushrod in response to a command by an electronic controller, an activation portion associated with an opposite end of the pushrod, and a pumping portion associated with the activation portion. For each of the plurality of pumping elements, the pumping portion is activated for pumping a fluid by the activation portion, which activation portion is activated by the actuator portion. The electronic controller is configured to selectively activate each of the plurality of pumping elements such that a flow of fluid from the cryogenic fluid pump results from continuous activations of the plurality of pumping elements at selected dwell times between activations of successive pumping elements.

Hydraulic drive multi-element cryogenic pump

A pump is disclosed. The pump may include at least one pumping mechanism. The at least one pumping mechanism may include a barrel formed of a substrate having a bore and a plunger formed of a substrate and slidably disposed within the bore in the barrel. The pump may further include a coating disposed on the plunger. The coating may include a main layer containing a tribological material and a sacrificial break-in layer disposed on the main layer, the break-in layer containing a tribological material.

Pump with plunger having tribological coating

A dual fuel common rail engine supplies pressurized natural gas and liquid diesel fuel at different pressures through a co-axial quill assembly for direct injection from a single fuel injector into an engine cylinder. Pressure waves in the gaseous fuel common rail are damped in a pressure damping chamber of the co-axial quill assembly to promote consistent gaseous fuel injection rates and quantities from the fuel injector.

Dual fuel common rail engine with co-axial quill assembly

A pump for cryogenic liquids including plurality of temperature managed pumping mechanisms. Each pumping mechanism including a barrel having a first end and a second end, and at least one bore extending through the barrel from the first end to the second end. The pump barrel including a stabilizer positioned on the first end and at least partially defining a space in fluid communication with the at least one bore to provide cooling to the barrel.

Pump for cryogenic liquids having temperature managed pumping mechanism

A dual fuel common rail engine supplies pressurized natural gas and liquid diesel fuel at different pressures through a co-axial quill assembly for direct injection from a single fuel injector into an engine cylinder. Pressure waves in the gaseous fuel common rail are damped in a pressure damping chamber of the co-axial quill assembly before the pressure wave can undermine consistent gaseous fuel injection rates and quantities from the fuel injector.

Growing community of inventors

Peoria, IL, United States of America

Shivangini Singh Hazari