Robert A Lucas

US Patent:

8132558, Mar 13, 2012

Filed:

Dec 1, 2009

Appl. No.:

12/592673

Inventors:

Robert G. Lucas - Ellington CT, US
Ilija Djordjevic - East Granby CT, US

Assignee:

Stanadyne Corporation - Windsor CT

International Classification:

F02M 37/00
F16K 17/26

US Classification:

123510, 1374939, 137512, 13750511

Abstract:

A high pressure piston fuel pump having a discharge check valve between the pumping chamber and a pressurized fuel reservoir and a pressure relief valve between the fuel reservoir and a passageway in the housing, wherein the discharge check valve and the pressure relief valve are contained within a single fitting assembly affixed at the pump housing. A first end flow passage is in fluid communication with the pumping chamber and provides an inlet to the discharge check valve and an outlet from the pressure relief valve. A second end flow passage is in fluid communication with the fuel reservoir and provides an outlet for the discharge check valve and an inlet for the pressure relief valve. Advantages include the ability to pre-test the outlet check and pressure relief prior to assembly into the pump housing, and improved flexibility of the outlet fitting location.

US Patent:

8495987, Jul 30, 2013

Filed:

Jun 10, 2010

Appl. No.:

12/802617

Inventors:

Robert Lucas - Ellington CT, US
Ilija Djordjevic - East Granby CT, US

Assignee:

Stanadyne Corporation - Windsor CT

International Classification:

F02M 37/04

US Classification:

123495

Abstract:

Pump piston seizures caused by excessive side loads produced by the uneven loading of a large piston return spring are prevented by separating the tappet return function from the piston return function, thereby minimizing the spring force acting on the piston. Preferably, a stronger, heavier load outer spring is mounted between the pump body and the tappet, such that it imparts no load and therefore no side loads to the pumping piston. A weaker, lighter load inner spring imparts less side load to the pumping piston than a conventional piston return spring, because the inner spring need not carry any tappet load. During both the pumping and charging strokes of the piston, the piston return spring can assist the tappet return spring, but the tappet return spring does not assist the piston return spring.

US Patent:

8579611, Nov 12, 2013

Filed:

Jan 9, 2008

Appl. No.:

12/008184

Inventors:

Robert Lucas - Ellington CT, US

Assignee:

Stanadyne Corporation - Windsor CT

International Classification:

F04B 19/00
A61M 1/00

US Classification:

417470, 417437

Abstract:

A clamping and seal loading technique for securing the plunger sleeve to the pump housing of a single plunger fuel pump. This is achieved by providing a load ring between a sleeve retainer and the sleeve, such that the axial force applied by the retainer during installation and attachment to the plunger bore wall of the housing, is distributed more evenly on the sleeve and the sealing surface of the sleeve against the housing adjacent to the pumping chamber. The even distribution of force minimizes misalignment of the sleeve and thus maintains concentricity between the sleeve and the plunger.

US Patent:

20080175735, Jul 24, 2008

Filed:

Jan 9, 2008

Appl. No.:

12/008185

Inventors:

Robert Lucas - Ellington CT, US
Ilija Djordjevic - East Granby CT, US

International Classification:

F04B 11/00

US Classification:

417540, 417254

Abstract:

An attenuator diaphragm assembly for a fuel injection pump, comprising a diaphragm formed of two half-shells, having mated flat rims that are welded together along their peripheral edges and a compression joint formed at inward, unwelded portions of the rims, and a carrier that captures the joined and welded rims.

US Patent:

20120087817, Apr 12, 2012

Filed:

Oct 6, 2010

Appl. No.:

12/924849

Inventors:

Robert G. Lucas - Ellington CT, US

International Classification:

F04B 11/00

US Classification:

417540

Abstract:

A damper assembly for a fuel pump includes at least one diaphragm assembly formed by joining two metal diaphragms to respective two sides of an imperforate central plate, thereby creating a pair of closely spaced diaphragms, each acting upon its own gas volume. Preferably, the diaphragm assembly has (a) a rigid, relatively thick circular or polygonal central plate, (b) a first circular diaphragm having a rim portion sealingly secured as by welding to the plate and a relatively thin, flexible, convex portion projecting from one side of the plate and defining a first pressurized gas volume, and (c) a second circular diaphragm having a rim portion sealingly secured as by welding to the plate and a relatively thin, flexible, convex portion projecting from the other side of the plate and defining an independent second pressurized gas volume.

US Patent:

20130209289, Aug 15, 2013

Filed:

Oct 4, 2011

Appl. No.:

13/878076

Inventors:

Robert Lucas - Ellington CT, US

Assignee:

Stanadyne Corporation - Windsor CT

International Classification:

F04B 43/02

US Classification:

417395

Abstract:

A damper assembly for a fuel pump includes at least one diaphragm assembly formed by joining two metal diaphragms to respective two sides of an imperforate central plate, thereby creating a pair of closely spaced diaphragms, each acting upon its own gas volume. Preferably, the diaphragm assembly has (a) a circular or polygonal central plate, (b) a first circular diaphragm having a rim portion sealingly secured as by welding to the plate and a relatively thin, flexible, convex portion projecting from one side of the plate and defining a first pressurized gas volume, and (c) a second circular diaphragm having a rim portion sealingly secured as by welding to the plate and a relatively thin, flexible, convex portion projecting from the other side of the plate and defining an independent second pressurized gas volume. The diaphragm assembly can be supported radially inside, outside, or on the weld.

US Patent:

20140008465, Jan 9, 2014

Filed:

Sep 6, 2013

Appl. No.:

14/020297

Inventors:

Robert G. LUCAS - Ellington CT, US

International Classification:

F01N 3/20

US Classification:

239490

Abstract:

An atomizing injector comprises a body having a central bore with a valve situated in the bore, leading to a chamber. An actuator moves the valve between closed condition and open conditions, selectively exposing the chamber to a flow of pressurized liquid. A discharge port extends from the chamber to a discharge orifice. A swirl element is situated in the chamber, while leaving a free space in the chamber immediately above the discharge port. When the valve is opened, liquid flows into the chamber, through the swirl element into the space, forming a whirl in the space before passing through the discharge port and exiting the discharge orifice as an atomized whirling spray.

US Patent:

20170254305, Sep 7, 2017

Filed:

Mar 7, 2016

Appl. No.:

15/062774

Inventors:

- Windsor CT, US
Robert G. Lucas - Ellington CT, US

International Classification:

F02M 59/36
F02M 59/46
F04B 53/10
F04B 7/00
F04B 49/22
F16K 31/06
F04B 19/22

Abstract:

An inlet valve assembly for a fuel pump comprises a valve assembly inflow path and valve assembly outflow path; a magnetic valve member situated in an intermediate flow path fluidly linking the inflow path and the outflow path; a magnetic pole adjacent the valve member; and a selectively energizable coil for generating a magnetic flux directly magnetically coupling the pole and the valve member; whereby the valve member opens and closes fluid communication between the inflow path and the outflow path in response to the energized state of the coil.