US4381188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grinding disk
Assignee: Tyrolit-Schleifmittelwerke Swarovski KG
•
Filing: 1981-01-29
•
Granted: 1983-04-26
•
Expires: 2001-01-29
Abstract
Abstract An abrasive disk comprising abrasive grains such as corundum, a bonding material, for example a resin, and a filler material. At least part of the filler material is active in the grinding process. Particles of this filler material are provided in the disk in the form of pellets or granules. The pellets and granules preferably consist of more than one substance. One substance forms a matrix and at least one other substance is imbedded in said matrix.
Inventors
- 👤 Walter Waizer
- 👤 Harald Helletsberger
- 👤 Christof Kriegshaber
- 👤 Volker Selgrad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:55
CPC Classifications
B; B24; B24D; B24D3/00; B24D3/34; B24D3/346
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
112 words
An abrasive article comprising abrasive grains, a bonding agent and pellets, wherein said pellets comprise (1) a bonding agent, (2) a matrix of at least one stable pulverulent filler resistant to water and air and to temperatures below the abrasive article manufacturing temperature, selected from the group consisting of graphite, pyrite, potassium, fluoborate, zinc sulfide, cryolite, calcium fluoride and sodium chiolite, and (3) at least one active filler imbedded in said matrix, selected from the group consisting of an alkali metal halogenide, an alkaline earth metal halogenide, elemental sulfur, ferric chloride, zinc chloride, tin chloride, manganese chloride, AlCl 3 , CoCl 3 , CrCl 3 , FeCl 2 and NH 4 Cl.
Claim 2
Dependent Claim
112 words
An abrasive article comprising abrasive grains, a bonding agent and pellets, wherein said pellets comprise (1) a bonding agent, (2) a matrix of at least one stable pulverulent filler resistant to water and air and to temperatures below the abrasive article manufacturing temperature, selected from the group consisting of graphite, pyrite, potassium, fluoborate, zinc sulfide, cryolite, calcium fluoride and sodium chiolite, and (3) at least one active filler imbedded in said matrix, selected from the group consisting of an alkali metal halogenide, an alkaline earth metal halogenide, elemental sulfur, ferric chloride, zinc chloride, tin chloride, manganese chloride, AlCl 3 , CoCl 3 , CrCl 3 , FeCl 2 and NH 4 Cl.
Claim 3
Dependent Claim
27 words
An abrasive article according to claim 1, wherein the average grain size of the matrix-forming filler is smaller than the average grain size of the imbedded substance.
Claim 4
Dependent Claim
20 words
An abrasive article according to claim 2, wherein ferric chloride of 60-150 μm is imbedded in graphite of 3-20 μm.
Claim 5
Dependent Claim
24 words
An abrasive article according to claim 1, wherein the grain size of the pellets corresponds approximately to the grain size of the abrasive grains.
Claim 6
Dependent Claim
12 words
An abrasive article according to claim 1, wherein the pellets are spherical.
Claim 7
Dependent Claim
14 words
An abrasive article according to claim 1, wherein the pellets have a polyhedral form.
Claim 8
Dependent Claim
37 words
An abrasive article according to claim 1, wherein the bonding agent employed for the pellets is a resin identical with the resin of the bond of the abrasive article, or having a high affinity to said resin.
Claim 9
Dependent Claim
27 words
An abrasive article according to claim 1, wherein the stable matrix-forming filler is contained in the pellets in an amount of at least 40 percent by volume.
Claim 10
Dependent Claim
27 words
An abrasive article according to claim 1, wherein the active filler is contained in the pellets in an amount of between 10 and 40 percent by volume.
Claim 11
Dependent Claim
26 words
An abrasive article according to claim 1, wherein polytetrafluoroethylene powder is added to the pellets in an amount of between 1 and 10 percent by volume.
Claim 12
Dependent Claim
16 words
An abrasive article according to claim 1, wherein the pellets are provided with a sealing coating.
Claim 13
Dependent Claim
31 words
An abrasive article according to claim 11, wherein said sealing coating is a cured synthetic resin or an intermediate condensation resin product compatible with the bonding agent of the abrasive article.
Claim 14
Dependent Claim
16 words
An abrasive article according to claim 11, wherein the pellets are provided with an inorganic coating.
Claim 15
Dependent Claim
16 words
An abrasive article according to claim 13, wherein the coating is a silicate or a phosphate.
Claim 16
Dependent Claim
17 words
An abrasive article according to claim 11, wherein fine grained hard matters are admixed with said coating.
Claim 17
Dependent Claim
24 words
An abrasive article according to claim 15, wherein the fine grained hard matters are at least one of silicon carbide, corundum and a silicate.
Claim 18
Dependent Claim
13 words
An abrasive article according to claim 1, wherein the stble filler is graphite.
Claim 19
Dependent Claim
18 words
An abrasive article according to claim 1, wherein the bonding agent for the pellets is an inorganic binder.
Claim 20
Dependent Claim
19 words
An abrasive article according to claim 18, wherein the inorganic binder is based on a silicate or a phosphate.
Claim 21
Dependent Claim
25 words
An abrasive article according to claim 1, wherein said bonding agent for the abrasive article is a thermosetting synthetic resin or a coldsetting bonding agent.
Claim 22
Dependent Claim
20 words
An abrasive article according to claim 20, wherein said bonding agent is a phenolic resin, a phosphate or a silicate.
Claim 23
Dependent Claim
34 words
An abrasive article according to claim 1, wherein the stable filler is graphite, and the graphite is combined in the pellets with a filler separating water at a temperature up to the 400° C.
Claim 24
Dependent Claim
19 words
An abrasive article according to claim 22, wherein the filler combined with graphite is calcium hydroxide or aluminium hydroxide.
References Cited (Backward Citations)
GB483777A
Cited
US2729553A
Cited
US2877103A
Cited
US3592618A
Cited
US3868232A
Cited
US4021208A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-04-25 | 1986-10-25 | 1987-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-25 | 1990-10-25 | 1991-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-25 | 1994-10-25 | 1995-04-26 | $7700.00 | Window Closed / Lapsed |