| Caterpillar SARL Patent applications |
| Patent application number | Title | Published |
|---|
| 20110264334 | INTERFERENCE PREVENTION CONTROL DEVICE OF WORK MACHINE - The present invention provides an interference prevention control device of a work machine, wherein the interference prevention control device is capable of limiting movement of a cab based on a position of a tool and thereby preventing interference of the cab with the tool as well as improving the work efficiency of the work machine. A cab position sensor for detecting a position of a movable cab, as well as a boom angle sensor and an arm angle sensor for detecting a position of a tool at the distal end of the work equipment, are connected to a controller. Solenoid-operated directional control valves for limiting movement of a cab lifting cylinder are disposed in pilot passages of a spool of a pilot-operated control valve, and the solenoids of the solenoid-operated directional control valves are connected to the controller. Based on the positional relationship between the position of the cab (cab interference area) detected by the cab position sensor and the position of the tool detected by the boom angle sensor and the arm angle sensor, the controller controls movement of an actuator of the cab by means of the solenoid-operated directional control valves so as to prevent interference between the cab and the tool. | 10-27-2011 |
| 20110197576 | HYDRAULIC CONTROL SYSTEM IN WORKING MACHINE - A hydraulic control system that includes a controller that controls the accumulator flow rate control valve and a discharge flow rate of the hydraulic pump, wherein the controller: determines a minimum value among an operation demand flow rate to be demanded by an operation amount of hydraulic actuator operating members, a pump flow rate to be determined by a discharge pressure of the hydraulic pump under a constant horsepower control and a maximum flow rate of the hydraulic pump such that the determined minimum value is an actuator supply flow rate to be supplied to the plurality of hydraulic actuators, and controls the discharge flow rate and the accumulator flow rate so as to supply the actuator supply flow rate corresponding to a total flow rate of the discharge flow rate and the accumulator flow rate. | 08-18-2011 |
| 20110185637 | HINGE AND DOOR UNIT - A hinge enabling a plurality of hold-stay members to automatically lock when the door is fully open, increasing the durability of the hinge, and enabling easy release of the hold-stay members. A hinge includes a one-side hinge plate, a plurality of opposing-side hinge plate portions provided along the lengthwise direction of the hinge plate and supported by it, and an open-angle limiting mechanism for stopping, at a specific angle, opening movement of the opposing-side hinge plate portions. | 08-04-2011 |
| 20110018308 | DRESSING COVER STRUCTURE IN CONSTRUCTION MACHINE - A construction machine includes a tank with an upper surface and a side surface that is configured to allow a user to get onto and off the upper surface; and a dressing cover that covers part of the side surface, an upper portion of the dressing cover being formed by an inclined surface having an inclination angle set so as not to allow the user who gets onto and off the upper surface to step on the upper portion. | 01-27-2011 |
| 20110004379 | INTERFERENCE PREVENTION CONTROL DEVICE OF WORK MACHINE - The present invention provides an interference prevention control device of a work machine, wherein the interference prevention control device is capable of preventing interference between the cab and a tool of the work equipment regardless of whether either one of the cab or the work equipment is moved while the other is being operated, and thereby improving operation efficiency of the work machine. With regard to a work machine provided with a movable cab, a cab position sensor for detecting a cab position, as well as a boom angle sensor and an arm angle sensor for detecting a position of a tool at the distal end of the work equipment, are connected to a controller. Solenoid-operated directional control valves for limiting the movement of a boom cylinder and an arm cylinder for operating the work equipment are disposed in pressure passages of a pilot-operated control valve, and the solenoids of the solenoid-operated directional control valves are connected to the controller. The controller computes moving vectors based on the position of the cab detected by the cab position sensor and the moving speed of the cab determined by differentiation, predicts the cab position where the cab should be after a prescribed time, and controls the boom cylinder and the arm cylinder by means of the solenoid-operated directional control valves so as to prevent interference between the predicted cab position and the tool position. | 01-06-2011 |
| 20090136293 | TWO WIRE SIGNAL OVER POWER WORK TOOL COUPLING AND IDENTIFICATION - A coupler for a machine is disclosed. The coupler includes a housing sized to matingly engage a corresponding coupler housing. An electrical connector, disposed within the coupler housing is configured to create an electrical connection between the tool and the machine at a communication node. The electrical connection provides a circuit pathway for a conductor delivering both power and data to a plurality of devices connected to the machine. A message containing tool identification information is transmitted from the communication node when the coupler housing is connected to the complimentary coupler housing. | 05-28-2009 |
