US3660942A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ball lapping device
Assignee: Sebastian Messerschmidt Spezialmaschinenfabrik Firma
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Filing: 1970-10-27
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Granted: 1972-05-09
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Expires: 1990-10-27
Abstract
Abstract A ball lapping device comprises two superimposed lapping discs spaced by a working gap, one of the discs being stationary while the other disc is rotatable and includes concentric lapping grooves in its side facing the other disc. The discs are encompassed by a rotary magazine including a circular guide path for balls to be lapped. A radial recess in the stationary disc connects the working gap with the guide path. In one mode of operation balls on the guide path are deflected by a guide from the guide path into the working gap and after being lapped for one revolution are returned by the guide to the guide path. In a second mode of operation the connection between the guide path and the working gap is closed whereby balls in the grooves are continued to be lapped until they have attained the desired surface finish.
Inventors
- 👤 Sebastian Messerschmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:22
CPC Classifications
B; B24; B24B; B24B11/00; B24B11/02; B24B11/04; B24B11/06
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
147 words
A device for lapping balls of rigid material, said device comprising in combination: a pair of lapping discs disposed in mutually parallel and spaced apart relationship, one of the discs having in its side facing the other disc a circular groove concentric with the discs, the spacing between the discs constituting a working gap, the grooved disc being rotary; an annular magazine encompassing both said discs, said magazine defining a circular guide path for balls to be lapped substantially coplanar with the grooved side of the rotary disc, said other disc including in its side facing the grooved disc a radially disposed cut-out communicating with said circular guide path to provide access for balls from the guide path of the magazine to the working gap and vice versa; and a closure means for selectively opening and closing the connection between the guide path and the working gap.
Claim 2
Independent Claim
147 words
A device for lapping balls of rigid material, said device comprising in combination: a pair of lapping discs disposed in mutually parallel and spaced apart relationship, one of the discs having in its side facing the other disc a circular groove concentric with the discs, the spacing between the discs constituting a working gap, the grooved disc being rotary; an annular magazine encompassing both said discs, said magazine defining a circular guide path for balls to be lapped substantially coplanar with the grooved side of the rotary disc, said other disc including in its side facing the grooved disc a radially disposed cut-out communicating with said circular guide path to provide access for balls from the guide path of the magazine to the working gap and vice versa; and a closure means for selectively opening and closing the connection between the guide path and the working gap.
Claim 3
Dependent Claim
40 words
The lapping device according to claim 1 wherein said closure means comprises an opening in a wall portion of the magazine facing the cut-out in said other lapping disc, and a closure member for selectively covering and uncovering said opening.
Claim 4
Dependent Claim
26 words
The lapping device according to claim 2 wherein said other lapping disc is stationarily mounted, and said closure member is releasably attached to said stationary disc.
Claim 5
Dependent Claim
47 words
The lapping device according to claim 1 and comprising a guide member detachably insertable into said cut-out, said guide member substantially extending across the radial width of the guide path and across the grooved side of the rotary disc, substantially bisecting the radial width of said cut-out.
Claim 6
Dependent Claim
59 words
The lapping device according to claim 4 wherein said magazine and said rotary disc are rotatable in opposite directions, balls on said guide path impacting against one side of said guide member being deflected into the working gap and balls in the working gap impacting against the other side of the guide member being deflected upon the guide path.
Claim 7
Dependent Claim
59 words
The lapping device according to claim 5 wherein said guide member is a guide strip terminating at its end within the guide path in a portion bent in opposition to the rotational direction of the magazine and at its end within the working gap in a portion bent in opposition to the rotational direction of the grooved lapping disc.
Claim 8
Dependent Claim
56 words
The lapping device according to claim 1 wherein said magazine comprises two concentric radially spaced walls, the outer one of said walls being rotatable and having secured thereto a ring member defining said guide path and the inner wall being stationary and including an opening constituting said connection between the guide path and the working gap.
Claim 9
Dependent Claim
76 words
The lapping device according to claim 7 wherein the center axes of the discs and the rotational axis of the outer magazine wall are eccentrically disposed, the outer peripheral wall of the rotary lapping disc and the stationary inner wall of the magazine including wall portions disposed in tangential relationship, said tangentially disposed wall portions including the cut-out in the rotary disc and the opening in the inner magazine wall in radial alignment with each other.
Claim 10
Dependent Claim
27 words
The lapping deVice according to claim 1 wherein the disc facing the groove is operationally stationary and mounted for lifting out of coaction with the grooved disc.
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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |