William Christopher Swick

US Patent:

7204085, Apr 17, 2007

Filed:

Aug 26, 2004

Appl. No.:

10/925908

Inventors:

Christopher Erik Bright - Raleigh NC, US
Gregory August Epplin - Apex NC, US
William Christopher Swick - Raleigh NC, US

Assignee:

Caterpillar Inc - Peoria IL

International Classification:

F16P 7/00
F16D 31/02

US Classification:

60423, 60452

Abstract:

A protection system is provided for a work machine with a power source. At least one sensor is configured to monitor a fluid parameter of a work machine system external to the power source. The sensor is further configured to produce a signal indicative of a value of the fluid parameter. The component protection system has a control module in communication with the at least one sensor, the control module being configured to derate a power source output base upon the value of the fluid parameter.

US Patent:

7344465, Mar 18, 2008

Filed:

Jul 28, 2005

Appl. No.:

11/191027

Inventors:

William Christopher Swick - Raleigh NC, US
Jerry Dwight Marr - Apex NC, US
Friedrich Konrad Diecke - Holly Springs NC, US

Assignee:

Caterpillar Inc. - Peoria IL

International Classification:

F16H 47/10

US Classification:

475 31, 475 73, 475 80

Abstract:

A machine, including a hydraulic pump and one or more hydraulic implements connected to the hydraulic pump. The machine may also include a hydraulic motor connected to the hydraulic pump and one or more propulsion devices. Additionally, the machine may include drive-system controls operable to selectively cause the hydraulic motor to supply power to one or more of the propulsion devices.

US Patent:

20120317964, Dec 20, 2012

Filed:

Jun 16, 2011

Appl. No.:

13/162172

Inventors:

Christopher J. Demick - Fuquay-Varina NC, US
Paul A. Dvorak - Sanford NC, US
William Christopher Swick - Apex NC, US
Vincent Guyard - Meyzieu, FR
Christopher Mark Elliott - Apex NC, US
Christopher Pruess - Plainfield IL, US

Assignee:

CATERPILLAR, INC. - Peoria IL

International Classification:

F16D 31/02

US Classification:

60327, 60445

Abstract:

A closed hydrostatic circuit with variable charge and variable flushing systems is disclosed. A variable displacement charge pump is configured to supply charge fluid and pilot control fluid to the hydrostatic circuit. An electronically controlled pressure regulating valve is in communication with an output of the charge pump and is linked to a controller. When the hydrostatic control system detects a high hydraulic temperature condition, the electronically controlled pressure regulating valve, that is in communication with an output of the charge pump and that is linked to a controller, increases the charge pump flow. A bidirectional variable displacement hydrostatic motor is connected in parallel to two input/output lines. A flush valve is in communication with the hydrostatic motor and both input/output lines. The flush valve and hydrostatic motor are both in communication with the flush orifice and a flush relief valve. When the pressure regulating valve causes the charge pump to operate at or near a full capacity, fluid exits the flush valve and passes through both the flush orifice and the flush relief valve. In contrast, when the pressure regulating valve causes the charge pump to operate at a lower or near minimum capacity, fluid exits the flush valve and passes through the flush orifice only without passing through the flush relief valve.

US Patent:

20140069092, Mar 13, 2014

Filed:

Sep 7, 2012

Appl. No.:

13/606200

Inventors:

Christopher Mark Elliott - Apex NC, US
William Christopher Swick - Apex NC, US
Jeremy T. Peterson - Washington IL, US
Paul A. Dvorak - Sanford NC, US

Assignee:

CATERPILLAR, INC. - Peoria IL

International Classification:

F15B 13/042
F04B 1/29
F04B 49/03
F15B 11/028

US Classification:

60445, 91505, 60327, 60451, 417212

Abstract:

A hydraulic pump control circuit may include a pressure reducing valve selectively operable to limit the amount of fluid pressure available to an actuator operably coupled to a pump displacement volume adjusting mechanism of a variable displacement pump. The pump may be hydraulically coupled to a motor configured to provide a torque output. The reduced pressure to the actuator limits actuator travel, thereby limiting pump displacement. Accordingly, torque output of the motor may be reduced, thereby improving traction control.

US Patent:

54470293, Sep 5, 1995

Filed:

Apr 8, 1994

Appl. No.:

8/224944

Inventors:

William C. Swick - Raleigh NC
David P. Smith - Joliet IL

Assignee:

Caterpillar Inc. - Peoria IL

International Classification:

F16D 3900
F16D 3102

US Classification:

60492

Abstract:

Hydrostatic transmissions are useful for propelling a machine to do work and travel relative to the ground. In performing work functions and during travel it is desirable to adjust machine speed to aid in handling the machine. The subject hydrostatic transmission control system includes a infinitely adjustable creeper hand lever which can be moved to any desired position and be maintained in the selected position until moved by the operator. A spring biased inching pedal can be used in combination with the creeper lever to further adjust the machine speed. This arrangement of components provides a control system for the hydrostatic transmission which can be adjusted and maintained at a desired setting.

US Patent:

58971769, Apr 27, 1999

Filed:

Mar 15, 1996

Appl. No.:

8/616548

Inventors:

Paul A. Dvorak - Kewanee IL
Peter R. Hildner - Apex NC
David P. Smith - Joliet IL
William C. Swick - Raleigh NC

Assignee:

Caterpillar Inc. - Peoria IL

International Classification:

F16D 3102

US Classification:

303151

Abstract:

A braking apparatus includes a brake cylinder having a first opening and a second opening defined therein. The braking apparatus also includes a movable member located within the brake cylinder which has a channel defined therein. The braking apparatus further includes a brake chamber in fluid communication with the brake cylinder. The brake chamber has a brake member located therein. The movable member is moved to a position which allows fluid communication between the first and second opening through the channel thus creating a subsequent pressure drop in the system. The pressure drop causes a hydrostatic transmission in fluid communication with the brake apparatus to be neutralized by a responsive displacement of a pump and motor which reduces the travel speed of a vehicle. Additionally, the movement of the movable member causes a brake member to be forced against a moving object.

US Patent:

61164542, Sep 12, 2000

Filed:

Oct 1, 1998

Appl. No.:

9/165255

Inventors:

David D. Henderson - Sanford NC
William C. Swick - Raleigh NC
Reid W. Waitt - Willow Springs NC

Assignee:

Caterpillar Inc. - Peoria IL

International Classification:

B65D 1122
E03B 1100

US Classification:

220563

Abstract:

A rotomolded hydraulic oil tank includes an integral dividing baffle which strengthens the tank structure, and diverts and slows returning oil for better air removal and oil mixing. This occurs by positioning the dividing baffle so that the top of the baffle is just below the oil level in the tank so that returning oil must flow a greater distance around the baffle at a reduced velocity thereby increasing the time the oil is in the tank before exiting the tank through the tank suction. The lower velocity of the oil and the increased passage time allows air in the returning oil more time to float to the surface of the oil in the tank.

US Patent:

62238280, May 1, 2001

Filed:

Aug 24, 1999

Appl. No.:

9/382380

Inventors:

Clint W. Paulson - DeKalb IL
William C. Swick - Raleigh NC

Assignee:

Caterpillar S.A.R.L. - Geneva

International Classification:

A01B 4300

US Classification:

171 63

Abstract:

An improved landscape rake including a rotatably operable rake mechanism for performing a raking function, a bucket for receiving material raked by the rake mechanism, and a fluid actuator connected to the rake mechanism operable for moving the rake mechanism relative to the bucket, the fluid actuator having a first port adapted for connection to a source of pressurized fluid for receiving the pressurized fluid therefrom for moving the rake mechanism to a position proximal to the bucket and a second port adapted for connection via a fluid path to a fluid receiver for discharging fluid thereto, the improvement including a fluid control system for the fluid actuator including a second fluid path connecting the first port of the fluid actuator with the first named fluid path and a valve disposed in the second fluid path operable for allowing fluid flow therethrough from the first port to the first named fluid path while preventing fluid flow from the first named fluid path to the first port to allow the rake mechanism to float when in the position proximal to the bucket.