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1. WO1992015799 - NEGATIVE LOAD CONTROL AND ENERGY UTILIZING SYSTEM

Publication Number WO/1992/015799
Publication Date 17.09.1992
International Application No. PCT/US1991/001490
International Filing Date 07.03.1991
IPC
F15B 11/044 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
11Servomotor systems without provision for follow-up action
02Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member
04for controlling the speed
044by means in the return line
F15B 13/04 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
13Details of servomotor systems
02Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
04for use with a single servomotor
F15B 21/14 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
21Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
14Energy-recuperation means
CPC
F15B 11/0445
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
11Servomotor systems without provision for follow-up action; ; Circuits therefor
02Systems essentially incorporating special features for controlling the speed or actuating force of an output member
04for controlling the speed
044by means in the return line ; , i.e. "meter out"
0445with counterbalance valves, e.g. to prevent overrunning or for braking
F15B 13/0417
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
13Details of servomotor systems
02Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
04for use with a single servomotor
0416with means or adapted for load sensing
0417Load sensing elements; Internal fluid connections therefor; Anti-saturation or pressure-compensation valves
F15B 21/14
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
21Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
14Energy-recuperation means
F15B 2211/212
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
2211Circuits for servomotor systems
20Fluid pressure source, e.g. accumulator or variable axial piston pump
21Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
212the pressure sources being accumulators
F15B 2211/30525
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
2211Circuits for servomotor systems
30Directional control
305characterised by the type of valves
30525Directional control valves, e.g. 4/3-directional control valve
F15B 2211/30535
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
2211Circuits for servomotor systems
30Directional control
305characterised by the type of valves
30525Directional control valves, e.g. 4/3-directional control valve
3053In combination with a pressure compensating valve
30535the pressure compensating valve is arranged between pressure source and directional control valve
Applicants
  • CATERPILLAR INC. [US]/[US] (AllExceptUS)
  • BUDZICH, Tadeusz [US]/[US] (UsOnly)
Inventors
  • BUDZICH, Tadeusz
Agents
  • BURROWS, J., W.
Priority Data
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) NEGATIVE LOAD CONTROL AND ENERGY UTILIZING SYSTEM
(FR) COMMANDE DE CHARGE NEGATIVE ET SYSTEME UTILISANT CETTE ENERGIE
Abstract
(EN)
Compensating spools (35, 55) for a negative type load which, without degrading the quality of the control, permit direct use of the fluid power energy of the negative type load acting on a cylinder (11) for control of a resistive or positive type load, thereby greatly increasing the efficiency of the control system.
(FR)
Bobines de compensation (35, 55) pour une charge de type négatif qui, sans détériorer la qualité de la commande, permettent l'utilisation directe de l'énergie hydraulique de la charge de type négatif agissant sur un cylindre (11) afin de commander une charge de type positif ou ohmique, augmentant ainsi considérablement l'efficacité du système de commande.
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