US4017224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gear machine with cutouts in the shaft journals
Assignee: Robert Bosch GmbH
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Filing: 1976-02-25
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Granted: 1977-04-12
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Expires: 1996-02-25
Abstract
Abstract A hydraulic gear-type machine has two meshing gears with axis-defining shafts received in respective journals having end faces turned axially toward the respective gears and formed with cutouts opening in opposite directions in line with input and output passages formed in a housing carrying the journals and enclosing the gears. The journals abut flatly at the cutouts along surfaces extending axially to immediately adjacent gears and chordally to cylindrical continuations of the outer surfaces of the journals. Each of the journals on each axial side of each gear is therefore formed with a recess opening toward the inlet passage and with a recess opening toward the outlet passage.
Inventors
- 👤 Claus Jons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:21
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/08; F04C2/082; F04C2/086
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
128 words
In a hydraulic machine wherein two meshing gears have parallel axis-defining shafts received in respective journals having end faces turned axially toward the respective gears and formed with cutouts opening in opposite directions in line with input and output passages formed in a housing carrying said journals and enclosing said gears, the improvement wherein said journals abut flatly at said cutouts along surfaces extending axially to immediately adjacent said gears and chordally to cylindrical continuations of the outer surfaces of said journals, each of said journals on each axial side of each gear being formed with a recess opening toward said inlet passage and a recess opening toward said outlet passage, each recess with the adjacent recess opening in the same direction constituting a one of said cutouts.
Claim 2
Dependent Claim
128 words
In a hydraulic machine wherein two meshing gears have parallel axis-defining shafts received in respective journals having end faces turned axially toward the respective gears and formed with cutouts opening in opposite directions in line with input and output passages formed in a housing carrying said journals and enclosing said gears, the improvement wherein said journals abut flatly at said cutouts along surfaces extending axially to immediately adjacent said gears and chordally to cylindrical continuations of the outer surfaces of said journals, each of said journals on each axial side of each gear being formed with a recess opening toward said inlet passage and a recess opening toward said outlet passage, each recess with the adjacent recess opening in the same direction constituting a one of said cutouts.
Claim 3
Dependent Claim
26 words
The improvement defined in claim 1 wherein said recesses have an axial depth equal to a minor fraction of the axial length of the respective gear.
Claim 4
Dependent Claim
22 words
The improvement defined in claim 1 wherein said recesses have bases and taper in the direction of said surfaces toward said bases.
Claim 5
Dependent Claim
45 words
The improvement defined in claim 1 wherein said gears have teeth and each of said recesses has a base spaced from the base of the other opposite recess of the same journal by a distance greater than the width of a one of said teeth.
Claim 6
Dependent Claim
29 words
The improvement defined in claim 4 wherein said surfaces have a length in a direction perpendicular to the axes of said shafts equal to at least twice said distance.
Claim 7
Dependent Claim
31 words
The improvement defined in claim 4 wherein said journals are symmetrical to each other about a symmetry plane lying on said surfaces, said recesses of each cutout symmetrically flanking said plane.
Claim 8
Dependent Claim
13 words
The improvement defined in claim 6 wherein said journals are mainly of D-section.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-11 | 1980-10-11 | 1981-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-11 | 1984-10-11 | 1985-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-11 | 1988-10-11 | 1989-04-12 | $7700.00 | Window Closed / Lapsed |