Patent US3747280A successfully refreshed from Google Patents.
US3747280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable power tool with orbital work-engaging means
Assignee: Robert Bosch GmbH
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Filing: 1971-07-30
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Granted: 1973-07-24
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Expires: 1991-07-30
Abstract
Abstract A portable power-operated grinding or polishing machine wherein a plate-like work-engaging tool orbits in its own plane in response to rotation of the output member of a transmission receiving torque from a universal motor in the housing of the machine. The tool is directly connected to the housing by several elastic columns whose end portions are fitted into sockets of or receive projections provided on the tool and on the housing. The tool is connected with an eccentric ring on the output member of the transmission by means of a single fastener so that it can be detached from the housing as soon as the fastener is removed.
Inventors
- 👤 R Stroezel
- 👤 H Lederer
- 👤 K Bartholoma
- 👤 R Hahner
- 👤 E Vogel
- 👤 A Hettich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:48
CPC Classifications
B; B24; B24B; B24B23/00; B24B23/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
159 words
In a power operated machine, particularly in an orbital sander or the like, a combination comprising, a housing; a motor mounted in said housing; a pad spaced from and movable with reference to said housing; motion transmitting means connecting said motor with said pad so as to impart to said pad an orbital movement; a plurality of elastic columns extending between said housing and said pad; a first plurality of coupling portions, having each an outline other than a circular outline, respectively provided on opposite ends of each of said elastic columns; and a second plurality of coupling portions, having each an outline matching that of a corresponding one of said first coupling portions, on said housing and said pad and respectively engaged with said first coupling portions, one of said plurality of coupling portions being female coupling portions and the other of said plurality of coupling portions being male coupling portions respectively engaged in said female coupling poRtions.
Claim 2
Dependent Claim
159 words
In a power operated machine, particularly in an orbital sander or the like, a combination comprising, a housing; a motor mounted in said housing; a pad spaced from and movable with reference to said housing; motion transmitting means connecting said motor with said pad so as to impart to said pad an orbital movement; a plurality of elastic columns extending between said housing and said pad; a first plurality of coupling portions, having each an outline other than a circular outline, respectively provided on opposite ends of each of said elastic columns; and a second plurality of coupling portions, having each an outline matching that of a corresponding one of said first coupling portions, on said housing and said pad and respectively engaged with said first coupling portions, one of said plurality of coupling portions being female coupling portions and the other of said plurality of coupling portions being male coupling portions respectively engaged in said female coupling poRtions.
Claim 3
Dependent Claim
22 words
A combination as defined in claim 1, wherein said female coupling potions are sockets provided on said pad and in said housing.
Claim 4
Dependent Claim
46 words
A combination as defined in claim 1, wherein said female coupling portions are recessed end portions on opposite ends of each column and wherein said male coupling portions are projections on said housing and said pad and extending into the recessed end portions of said columns.
Claim 5
Dependent Claim
60 words
A combination as defined in claim 1, wherein said motion transmitting means comprises a member rotatably and axially immovably mounted in said housing, and including fastener means removably securing sad pad to said member, said first and second coupling portions being merely in frictional engagement with each other to thus facilitate replacement of said columns after removal of said pad.
Claim 6
Dependent Claim
17 words
A combination as defined in claim 1, wherein each of said coupling portions has a polygonal outline.
Claim 7
Dependent Claim
19 words
A combination as defined in claim 3, wherein said recesses form part of through holes in the respective column.
Claim 8
Dependent Claim
22 words
A combination as defined in claim 3, wherein each of said recesses and each of said projections has a polygonal cross-sectional outline.
Claim 9
Dependent Claim
58 words
A combination defined in claim 1, wherein said motion transmitting means comprises a rotary member, an eccentric rotatably mounted on said rotary member and fastener means securing said pad to said eccentric so that said pad orbits in a plane which is normal to the axis of said rotary member when the latter is rotated by said motor.
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) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |