GB1232590A – – Google Patents
GB1232590A – – Google Patents
Info
Publication number
GB1232590A
GB1232590A
GB3847467A
GB1232590DA
GB1232590A
GB 1232590 A
GB1232590 A
GB 1232590A
GB 3847467 A
GB3847467 A
GB 3847467A
GB 1232590D A
GB1232590D A
GB 1232590DA
GB 1232590 A
GB1232590 A
GB 1232590A
Authority
GB
United Kingdom
Prior art keywords
gears
lubricant
bushes
recesses
bush
Prior art date
1967-08-21
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
GB3847467A
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.)
1967-08-21
Filing date
1967-08-21
Publication date
1971-05-19
1967-08-21
Application filed
filed
Critical
1971-05-19
Publication of GB1232590A
publication
Critical
patent/GB1232590A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F04—POSITIVE – DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
F04C2/00—Rotary-piston machines or pumps
F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
F04C2/082—Details specially related to intermeshing engagement type machines or pumps
F04C2/086—Carter
F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F04—POSITIVE – DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 – F04C14/00
F04C15/0088—Lubrication
Abstract
1,232,590. Gear pumps and motors. DOWTY HYDRAULIC UNITS Ltd. July 30, 1968 [Aug.21, 1967], No.38474/67. Heading F1F. [Also in Division F2] Shafts of meshing gears are mounted in bushes each having a lubricant groove formed in the bore thereof and an inlet conveniently located in a side thereof, said inlet connecting to the lubricant groove and to a space formed between the meshing teeth, which space increases in volume as the teeth pass by thus creating a suction effect and causing lubricant to be drawn through said inlet via said lubricant groove and thus lubricate the bushes. In an embodiment a gear pump 10, Fig. 1, has a casing 11 having an inlet port 12, Fig. 2, and an outlet port 13. Gears 14 and 15, Fig. 1, are mounted on shafts 16, 17 and 18, 19 respectively. The latter are supported by pairs of bushes 20, 21 and 22, 23 which are of ‘D’-shaped cross-section. Each bush is provided with a lubricant groove 50, Fig. 2 in its bore; each shaft 16, 17, 18 or 19 has an annular recess 38, 39, 40 and 41 adjacent the side faces of the gears 14, 15; each bush 20,21,22 or 23 has a side-face 44, Fig. 2, adjacent the gears and provided with a slot 51, two of which connect the respective annular recesses (38 and 40 for example) together; and each bush has another side-face 48, Fig.3, remote from the gears and provided with a recess 47 therein, the side-face 48 being formed on projections 28 or 29 of the bushes and the recess 47 being connected to the inlet port 12 by means of a passageway 46. Seals 30, 31 are positioned on the projections 28, 29 respectively. In operation, then the shaft is rotated, the gears 14, 15 rotate, drawing lubricant through the inlet port 12 and discharging the lubricant under pressure through the outlet port 13. The teeth of the gears commence to pass the slot 51 of each respective bush as they separate on leaving the condition of mesh, the inter-tooth space increases in volume, a pressure drop is created so that a pressure differential exists between the high-pressure lubricant present in the inlet port 12 (and the recesses 45) and in the low-pressure lubricant present in the slots 51. Thus lubricant flows from the recesses 45 in the bushes, through passageways 46, into recesses 47, through spaces 49 which are formed in the ends of the shafts remote from the gears, through chambers 36, 37 which are formed in the casing 11, through the grooves 50, into the annular recesses 38, 39, 40 and 41, and into the slots 51.
GB3847467A
1967-08-21
1967-08-21
Expired
GB1232590A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
GB3847467
1967-08-21
Publications (1)
Publication Number
Publication Date
GB1232590A
true
GB1232590A
(en)
1971-05-19
Family
ID=10403688
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB3847467A
Expired
GB1232590A
(en)
1967-08-21
1967-08-21
Country Status (4)
Country
Link
US
(1)
US3490382A
(en)
JP
(1)
JPS4943605B1
(en)
FR
(1)
FR1597458A
(en)
GB
(1)
GB1232590A
(en)
Families Citing this family (18)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3690793A
(en)
*
1971-01-27
1972-09-12
Sundstrand Corp
Gear pump with lubricating means
US3833319A
(en)
*
1973-03-21
1974-09-03
Dowty Hydraulic Units Ltd
Positive-displacement liquid-pressure machines and pressure-balanced journal/thrust bushes therefor
GB1554262A
(en)
*
1975-06-24
1979-10-17
Kayaba Industry Co Ltd
Gear pump
GB1572467A
(en)
*
1977-02-01
1980-07-30
Hamworthy Hydraulics Ltd
Gear pumps
US4265602A
(en)
*
1978-11-15
1981-05-05
Kayabakogyokabushikikaisha
Gear pump with low pressure shaft lubrication
US4470776A
(en)
*
1979-11-28
1984-09-11
Commercial Shearing, Inc.
Methods and apparatus for gear pump lubrication
US4392798A
(en)
*
1981-04-03
1983-07-12
General Signal Corporation
Gear pump or motor with low pressure bearing lubrication
CH674244A5
(en)
*
1986-07-31
1990-05-15
Barmag Barmer Maschf
DE3723894A1
(en)
*
1986-07-31
1988-03-03
Barmag Barmer Maschf
Gear pump, in particular as a booster pump
JP2613051B2
(en)
*
1987-05-07
1997-05-21
カヤバ工業株式会社
Gear pump
US5244367A
(en)
*
1990-11-30
1993-09-14
Aeroquip Corporation
Gear pump with a resilient means for biasing a side wear plate
US5417556A
(en)
*
1994-03-08
1995-05-23
Alliedsignal Inc.
Bearing for gear pump
WO2000055504A1
(en)
*
1999-03-17
2000-09-21
Hitachi, Ltd.
Gear pump, fuel supply device using it, and gear motor
US6716011B2
(en)
2001-06-14
2004-04-06
Monarch Hydraulics, Inc.
Hydraulic pump utilizing floating shafts
US8998496B2
(en)
*
2012-03-30
2015-04-07
Imo Industries, Inc.
Gear pump with asymmetrical dual bearing
JP5783305B2
(en)
*
2013-09-18
2015-09-24
ダイキン工業株式会社
Gear fluid device
CN106481550A
(en)
*
2015-08-28
2017-03-08
河南航天液压气动技术有限公司
A kind of long-life gear Sliding bearing for pump
US11703050B2
(en)
*
2020-09-08
2023-07-18
Eaton Intelligent Power Limited
Gear pump with self-lubricating bearings
Family Cites Families (7)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US1372576A
(en)
*
1920-12-03
1921-03-22
Fried Krupp Ag Germaniwerft
Lubricating device for the shaft-bearings of rotary pumps
GB322778A
(en)
*
1928-07-12
1929-12-12
British Celanese
Improvements in or relating to processes of pumping artificial silk spinning solutions
US2276107A
(en)
*
1939-05-09
1942-03-10
John P Simons
Gear pump
US2775209A
(en)
*
1946-06-14
1956-12-25
Roper Corp Geo D
Lubrication means for rotary pumps
US2756684A
(en)
*
1954-11-12
1956-07-31
Sier Bath Gear And Pump Co Inc
Rotary gear-type pump
US2986096A
(en)
*
1955-10-24
1961-05-30
Plessey Co Ltd
Journal bearing
US2910142A
(en)
*
1958-08-29
1959-10-27
John O Almen
Means of lubricating gears
1967
1967-08-21
GB
GB3847467A
patent/GB1232590A/en
not_active
Expired
1968
1968-08-09
US
US751612A
patent/US3490382A/en
not_active
Expired – Lifetime
1968-08-21
JP
JP43059297A
patent/JPS4943605B1/ja
active
Pending
1968-08-21
FR
FR1597458D
patent/FR1597458A/fr
not_active
Expired
Also Published As
Publication number
Publication date
US3490382A
(en)
1970-01-20
DE1775401A1
(en)
1972-03-16
FR1597458A
(en)
1970-06-29
JPS4943605B1
(en)
1974-11-22
DE1775401B2
(en)
1976-04-15
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Legal Events
Date
Code
Title
Description
1971-07-14
49R
Reference inserted (sect. 9/1949)
1985-03-20
PCNP
Patent ceased through non-payment of renewal fee
