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US 6,283,734 B1Granted
Gear pump and a method for positioning a gear pump shaft
AssigneeMaag Pump Systems Textron AG
InventorPeter Blume
Life of this patent
Estimating the term…
Abstract
A gear pump for delivering liquid media has a pump housing with at least two bores, in which at least two meshing gears with tooth tips are contained. The gears are radially mounted by bearing surfaces which on one side consist of areas of the tooth tips and on the other side, of areas of the interior of the bores. This arrangement requires no slide bearings in the conventional sense, which results in a smaller number of pump parts and hence to reduced manufacturing costs.
Claims28
Gear pump comprising:
- a pump housing forming a plurality of pump housing bores,
- a gear disposed in each of said bores and having gear tooth tips which intermesh with gear tooth tips of at least one other of said gears during pumping operation with said gears rotating about respective gear longitudinal axes,
- an inlet opening into said housing operable to supply medium to be pumped, and
- an outlet leading from said housing and operable to guide pumped medium out of the housing,
- wherein at least one of said inlet and outlet includes a plurality of openings separated by support structure,
- wherein the at least one of said gears is supported on a driven shaft,
- wherein said driven shaft has no radial bearing support at said pump housing, and
- wherein the gears are radially supported in the housing with bearing surfaces formed by areas of facing tooth tips of the gears and with bearing surfaces formed by housing interior surfaces forming the bores and by the support structure separating the plurality of openings.
5 more elements
Gear pump comprising:
- a pump housing forming a plurality of pump housing bores,
- a gear disposed in each of said bores and having gear tooth tips which intermesh with gear tooth tips of at least one other of said gears during pumping operation with said gears rotating about respective gear longitudinal axes,
- inlet means opening into said housing in a direction substantially perpendicular to the gear longitudinal axes and operable to supply medium to be pumped,
- outlet means leading from said housing in a direction aligned with the inlet means and substantially perpendicular to the gear longitudinal axes and operable to guide pumped medium out of the housing,
- wherein at least one of said inlet and outlet means includes a plurality of openings separated by support structure, and
- wherein the shafts of the gears have no bearing support at the housing, said gears being supported in the housing with bearing surfaces formed by areas of facing tooth tips of the gears and with bearing surfaces formed by housing interior surfaces forming the bores and by the support structure separating the plurality of openings.
3 more elements
Gear pump comprising:
- a pump housing forming a plurality of pump housing bores,
- a gear disposed in each of said bores and having gear tooth tips which intermesh with gear tooth tips of at least one other of said gears during pumping operation with said gears rotating about respective gear longitudinal axes,
- inlet means opening into said housing in a direction substantially perpendicular to the gear longitudinal axes and operable to supply medium to be pumped,
- outlet means leading from said housing in a direction aligned with the inlet means and substantially perpendicular to the gear longitudinal axes and operable to guide pumped medium out of the housing,
- wherein at least one of said inlet and outlet means includes a plurality of openings separated by support structure,
- wherein the gears are supported in the housing with bearing surfaces formed by areas of facing tooth tips of the gears and with bearing surfaces formed by housing interior surfaces forming the bores and by the support structure separating the plurality of openings, and
- wherein the outlet means includes a plurality of outlet openings separated by respective support structure.
4 more elements
A method for supporting gears in a gear pump of the type comprising:
- a pump housing forming a plurality of pump housing bores,
- a gear disposed in each of said bores and having gear tooth tips which intermesh with gear tooth tips of at least one other of said gears during pumping operation with said gears rotating about respective gear longitudinal axes,
- an inlet opening into said housing operable to supply medium to be pumped, and
- an outlet leading from said housing and operable to guide pump ed medium out of the housing,
- wherein at least one of said inlet and outlet includes a plurality of openings separated by support structure,
- wherein the at least one of said gears is supported on a driven shaft,
- wherein at least one of said gears being supported on a shaft extending through an end wall of said housing,
- wherein said driven shaft has no radial bearing support at said pump housing,
- said method comprising supporting the gears radially in the housing with bearing surfaces formed by areas of facing tooth tips of the gears and with bearing surfaces formed by housing interior surfaces forming the bores and by the support structure separating the plurality of openings.
6 more elements
A method for supporting gears in a gear pump of the type comprising:
- a pump housing forming a plurality of pump housing bores,
- a gear disposed in each of said bores and having gear tooth tips which intermesh with gear tooth tips of at least one other of said gears during pumping operation with said gears rotating about respective gear longitudinal axes,
- inlet means opening into said housing in a direction substantially perpendicular to the gear longitudinal axes and operable to supply medium to be pumped, and
- outlet means leading from said housing in a direction aligned with the inlet means and substantially perpendicular to the gear longitudinal axes and operable to guide pumped medium out of the housing,
- wherein at least one of said inlet and outlet means includes a plurality of openings separated by support structure,
- said method comprising supporting the gears in the housing with shafts of the gears having no bearing support and with bearing surfaces formed by areas of facing tooth tips of the gears and with bearing surfaces formed by housing interior surfaces forming the bores and by the support structure separating the plurality of openings.
3 more elements
Dependencies are inferred from the claim text.