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1. US5711345 - Method and apparatus for forming a control valve for hydraulic circuits

Office
United States of America
Application Number 08577415
Application Date 22.12.1995
Publication Number 5711345
Publication Date 27.01.1998
Grant Number 5711345
Grant Date 27.01.1998
Publication Kind A
IPC
F15B 9/10
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
9Servomotors with follow-up action, i.e. in which the position of the actuated member conforms with that of the controlling member
02with servomotors of the reciprocatable or oscillatable type
08controlled by valves affecting the fluid feed or the fluid outlet of the servomotor
10in which the controlling element and the servomotor each controls a separate member, these members influencing different fluid passages or the same passage
F15B 13/04
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
B23Q 27/00
BPERFORMING OPERATIONS; TRANSPORTING
23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL, CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
27Geometrical mechanisms for the production of work of particular shapes, not fully provided for in another subclass
B62D 5/08
BPERFORMING OPERATIONS; TRANSPORTING
62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
DMOTOR VEHICLES; TRAILERS
5Power-assisted or power-driven steering
06fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
08characterised by type of valve used
B62D 5/083
BPERFORMING OPERATIONS; TRANSPORTING
62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
DMOTOR VEHICLES; TRAILERS
5Power-assisted or power-driven steering
06fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
08characterised by type of valve used
083Rotary valves
CPC
B23Q 27/003
BPERFORMING OPERATIONS; TRANSPORTING
23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING
27Geometrical mechanisms for the production of work of particular shapes, not fully provided for in another subclass
003of conical non-circular section manufactured by an apparatus with a first rotational cutting vector and a second linear feed vector, intersecting the first vector
B62D 5/083
BPERFORMING OPERATIONS; TRANSPORTING
62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
DMOTOR VEHICLES; TRAILERS
5Power-assisted or power-driven steering
06fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
08characterised by type of ; steering; valve used
083Rotary valves
Y10T 137/86654
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
137Fluid handling
8593Systems
86493Multi-way valve unit
86574Supply and exhaust
86638Rotary valve
86646Plug type
86654For plural lines
Y10T 137/86662
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
137Fluid handling
8593Systems
86493Multi-way valve unit
86574Supply and exhaust
86638Rotary valve
86646Plug type
86662Axial and radial flow
Applicants Techco Corporation
Inventors Phillips Edward H.
Agents Gifford, Krass, Groh, Sprinkle, Patmore, Anderson & Citkowski, P.C.
Title
(EN) Method and apparatus for forming a control valve for hydraulic circuits
Abstract
(EN)

Methods and machining apparatus for indexing and forming spool and pinion shafts for use in a rotary control valve of a power steering system are disclosed. In particular, the methods include forming a contoured spool shaft extension on an end of a spool shaft and a complementary rosette on an end of a pinion shaft, and forming spool and pinion shaft holders having complementary rosettes and contoured ends, respectively, to permit accurate mounting of the spool and pinion shafts during subsequent machine operations. The machining apparatus includes a workpiece holder which rotates the spool or pinion shaft at a predetermined speed and a cutting assembly which moves a cutting tool into and out of contact with the workpiece at three times the speed of rotation of the workpiece.

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