GB1160885A – Fluid Power Steering System
– Google Patents
GB1160885A – Fluid Power Steering System
– Google Patents
Fluid Power Steering System
Info
Publication number
GB1160885A
GB1160885A
GB39918/66A
GB3991866A
GB1160885A
GB 1160885 A
GB1160885 A
GB 1160885A
GB 39918/66 A
GB39918/66 A
GB 39918/66A
GB 3991866 A
GB3991866 A
GB 3991866A
GB 1160885 A
GB1160885 A
GB 1160885A
Authority
GB
United Kingdom
Prior art keywords
spool
pump
fluid
valve
recess
Prior art date
1965-10-22
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB39918/66A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Navistar Inc
Original Assignee
International Harverster Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
1965-10-22
Filing date
1966-09-07
Publication date
1969-08-06
1966-09-07
Application filed by International Harverster Corp
filed
Critical
International Harverster Corp
1969-08-06
Publication of GB1160885A
publication
Critical
patent/GB1160885A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
B—PERFORMING OPERATIONS; TRANSPORTING
B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
B62D—MOTOR VEHICLES; TRAILERS
B62D12/00—Steering specially adapted for vehicles operating in tandem or having pivotally connected frames
B—PERFORMING OPERATIONS; TRANSPORTING
B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
B62D—MOTOR VEHICLES; TRAILERS
B62D53/00—Tractor-trailer combinations; Road trains
B62D53/02—Tractor-trailer combinations; Road trains comprising a uniaxle tractor unit and a uniaxle trailer unit
B—PERFORMING OPERATIONS; TRANSPORTING
B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
B62D—MOTOR VEHICLES; TRAILERS
B62D53/00—Tractor-trailer combinations; Road trains
B62D53/02—Tractor-trailer combinations; Road trains comprising a uniaxle tractor unit and a uniaxle trailer unit
B62D53/021—Tractor-trailer combinations; Road trains comprising a uniaxle tractor unit and a uniaxle trailer unit comprising a universal coupling joint
F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
F15B17/00—Combinations of telemotor and servomotor systems
F15B17/02—Combinations of telemotor and servomotor systems in which a telemotor operates the control member of a servomotor
Abstract
1,160,885. Steering articulated vehicles. INTERNATIONAL HARVESTER CO. 7 Sept., 1966 [22 Oct., 1965], No. 39918/66. Heading B7H. In an hydraulic power steering system for an articulated scraper vehicle having tractor and scraper sections relatively rotatable about a vertical steering axis by hydraulic rams 15, 16 controlled by axial displacement of the spool 55 of a control valve 40, a feedback signal for restoring the spool 55 to its neutral position when the sections assume the desired angular relationship is provided by a follow-up pump 154 which comprises a cylindrical casing 156 fixed to the tractor section coaxially of the steering axis and a radial vane 160 fixed to the scraper section and co-operating with a partition in the casing 156 to form two fluid chambers 165, 166 communicating with the valve 40. A gooseneck 13 on the scraper section is connected by vertical pivot pins 24, 25 to a yoke 20 supported for pivotal movement about a horizontal axis in bosses 18, 19 on the tractor section. The casing 156 is connected by a bracket 157 to the yoke 20, and the vane 160 by a shaft 159 to the pivot pin 25 which rotates with the gooseneck 13. The chambers 165, 166 are connected to the respective branches 144, 145 of a control circuit including a control pump 143 which is manually actuated by a steering- wheel 141 to operate the control valve 40 by displacing fluid in either direction between control chambers 92 at the ends of the spool 55. The spool 55 is displaced in the appropriate direction to a greater or lesser extent depending on the rate of rotation of the steering wheel 141 to direct to the rams 15, 16 the output of a primary fluid pressure pump 42 either alone or combined with the output of a secondary pump 43. Springs 68 urge the spool into a neutral position wherein fluid delivered by the primary pump 42 to a recess 83 flows around lands 57, 58 on the spool to a passage 96 communicating through a check valve 99 and discharge port 50 with a reservoir 44, and wherein fluid delivered by the secondary pump 43 to a recess 86 flows across a groove 65 to the discharge port and reservoir. A small displacement of the spool 55 results in co-operation of the lands 57, 58 with lands in the valve body 41 to direct the fluid from the recess 83 into one of outlet ports 97, 98 communicating with the rams 15, 16 through respective supply conduits 102, 103 including unloading valves 45 arranged to open when the back pressure at the primary pump outlet 47 attains a predetermined value. A greater displacement of the spool 55 results in co-operation of one of lands 60, 61 on the spool with a land 78 in the body 41 to prevent the output from the secondary pump 43 from flowing across the groove 65 to the reservoir 44 whereupon increased pressure in the recess 86 opens a valve 123 so that the output from the secondary pump 43 is combined with that from the primary pump 42 in the recess 83. A relief valve 131 prevents excessive pressures in the circuit, and a passage 59 for draining leakage fluid from annular chambers 90 near each end of the spool 55 may be throttled to damp spool movements. Make-up fluid is supplied to the control circuit from the passage 96 through a filter 153 and check valves 150, and relief valves 146 prevent excess pressures across the control pump 143.
GB39918/66A
1965-10-22
1966-09-07
Fluid Power Steering System
Expired
GB1160885A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US500724A
US3326317A
(en)
1965-10-22
1965-10-22
Fluid power steering system
Publications (1)
Publication Number
Publication Date
GB1160885A
true
GB1160885A
(en)
1969-08-06
Family
ID=23990648
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB39918/66A
Expired
GB1160885A
(en)
1965-10-22
1966-09-07
Fluid Power Steering System
Country Status (3)
Country
Link
US
(1)
US3326317A
(en)
DE
(1)
DE1278857B
(en)
GB
(1)
GB1160885A
(en)
Families Citing this family (9)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3566749A
(en)
*
1968-03-13
1971-03-02
Caterpillar Tractor Co
Hydraulic flow amplifier valve
DE2553748C3
(en)
*
1975-11-29
1981-05-07
Danfoss A/S, 6430 Nordborg
Hydraulic control device, in particular for vehicle steering
US4081054A
(en)
*
1977-04-07
1978-03-28
Caterpillar Tractor Co.
Hydraulic steering with feedback
US4172571A
(en)
*
1978-01-25
1979-10-30
The United States Of America As Represented By The Secretary Of The Air Force
Three actuator steering system
US4253540A
(en)
*
1979-10-29
1981-03-03
Caterpillar Tractor Co.
Steering system for cold environments
US4286684A
(en)
*
1980-03-03
1981-09-01
Caterpillar Tractor Co.
Hydraulic servo steering system
DE3152968C2
(en)
*
1981-09-11
1993-10-07
Caterpillar Inc
Control system with selective pressure division
DE10256307A1
(en)
*
2002-12-03
2004-06-24
O&K Orenstein & Koppel Ag
Hydraulic steering for vehicles
WO2013158718A1
(en)
*
2012-04-18
2013-10-24
Getman Corporation
Joint of an articulated vehicle
Family Cites Families (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
USRE25036E
(en)
*
1957-04-19
1961-09-12
Fluid power steering system
US3151694A
(en)
*
1961-05-11
1964-10-06
Clark Equipment Co
Steering arrangement and hydrostatic drive for articulated vehicle
US3159230A
(en)
*
1962-02-14
1964-12-01
Clark Equipment Co
Power steering system for towable vehicles
1965
1965-10-22
US
US500724A
patent/US3326317A/en
not_active
Expired – Lifetime
1966
1966-09-07
GB
GB39918/66A
patent/GB1160885A/en
not_active
Expired
1966-10-18
DE
DEJ32029A
patent/DE1278857B/en
active
Pending
Also Published As
Publication number
Publication date
US3326317A
(en)
1967-06-20
DE1278857B
(en)
1968-09-26
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Improvements in or relating to Fluid Steering Systems.
Legal Events
Date
Code
Title
Description
1969-12-17
PS
Patent sealed [section 19, patents act 1949]
1971-05-26
PLNP
Patent lapsed through nonpayment of renewal fees
