Ralf D Gomm

20110024255, Feb 3, 2011

Jun 21, 2010

12/819276

Ralf GOMM - Cleveland OH, US
Dale Vanderlaan - Kalamazoo MI, US

F16D 28/00
F16P 3/00
H02H 7/06
H02H 7/18

192 841, 192129 A, 361 20, 307 107, 180 65275

An electrical interlock system for including a power takeoff device operable in a first state to transfer mechanical energy from an associated combustible engine to an associated electric motor and/or generator and operative in a second state to prevent the transfer of mechanical energy from the associated combustible engine to the associated electric motor and/or generator. A relay having a first switch and an energizable portion, is coupled to the power takeoff device, the electric motor and an associated power source, such that when the energizable portion is receiving electrical power from the associated power source, the power takeoff device is in the first state and when the energizable portion is not receiving electrical power from the associated power source, the power takeoff device is in the second state.

20110208363, Aug 25, 2011

Sep 11, 2009

13/062305

Dale Vanderlaan - Kalamazoo MI, US
Ralf Gomm - Cleveland OH, US
Amir Shenouda - Avon Lake OH, US

PARKER HANNIFIN CORPORATION - Cleveland OH

G05D 7/06
G06F 1/28

700282

A method of controlling an electro-hydraulic actuator system having multiple functions includes the steps of: receiving input signals corresponding to a desired operation of the functions of the system; establishing an operating limit for the system; determining an operating characteristic of the system; using the operating limit and the determined operating characteristic to determine a limitation control factor; and influencing the received input signal with the determined limitation control factor for operating the system within the established operating limit.

20110209471, Sep 1, 2011

Sep 3, 2009

13/060452

Dale Vanderlaan - Kalamazoo MI, US
Ralf Gomm - Cleveland OH, US

F15B 21/08

60446

An electro-hydraulic actuation system () includes an unbalanced hydraulic actuator () capable of motion in retraction and extension directions during movement of a load (). A pump () provides a flow of fluid to the actuator. A displacement of the pump controls a velocity of the actuator during motion in the retraction and extension directions. An electric motor () drives the pump. Speed and direction of the electric motor affects the displacement of the pump. A controller () controls the speed and direction of the electric motor. A feedback device () is operable for sensing a system condition and for providing a feedback signal indicative of the sensed system condition to the controller. The controller is responsive to the feedback signal for determining an occurrence of an over-center load condition and for modifying the speed of the electric motor in response to the occurrence in an attempt to maintain the velocity of the actuator.

20190145433, May 16, 2019

Apr 25, 2017

16/098013

- Cleveland OH, US
Ralf Gomm - Foster City CA, US
Vivek Bhaskar - Charlotte NC, US
Björn Eriksson - Johanneshov, SE

Parker-Hannifin Corporation - Cleveland OH

F15B 11/17
E02F 9/22

A hydraulic system includes one or more hydraulic subsystems that have a source of additional flow for supplying an auxiliary system. The hydraulic system may include one or more actuator systems, a boost system, and a further hydraulic system, such as a steering system. The source of additional flow for supplying the auxiliary system may include: sizing the boost system for providing both full boost function and auxiliary function, sizing the steering system for providing both full steering function and auxiliary function, utilizing available flow from an unused actuator function, and/or utilizing a selector manifold for actively selecting the source of auxiliary flow based on the flow and pressure demands of the respective hydraulic systems. Such a hydraulic system enables flow to be available to an auxiliary function regardless of the flow requirements for the actuator functions and/or other vehicle functions, while also minimizing interactions and flow disruptions to the various hydraulic subsystems.

20170184139, Jun 29, 2017

May 15, 2015

15/312959

- Cleveland OH, US
Bjoern ERIKSSON - Johanneshov, SE
Ralf GOMM - Foster City CA, US

F15B 21/08
F15B 13/02
E02F 9/20
F15B 19/00
E02F 9/22
F15B 11/08
F15B 13/04

An electro-hydraulic actuation system includes a regeneration valve in fluid communication with a first fluid chamber and a second fluid chamber of a hydraulic actuator, and a dump valve is in fluid communication with the second fluid chamber and a fluid reservoir. A pump provides a flow of fluid to the first and second fluid chambers, a displacement of the pump controlling a velocity of the actuator during motion in the retraction and extension directions. An electric motor drives the pump, and a controller controls a state of the regeneration valve and the dump valve. At least one feedback device senses a system condition and provides a respective feedback signal indicative of the sensed system condition to the controller, the controller responsive to the feedback signal to determine an occurrence of an over-center load condition and control a state of the regeneration valve and the dump valve in response to the occurrence to maintain the velocity of the actuator.