US3690572A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two press grinder constructed for easy wheel replacement
Assignee: JM Voith GmbH
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Filing: 1970-11-25
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Granted: 1972-09-12
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Expires: 1990-11-25
Abstract
Abstract The specification discloses a two press grinder, especially for grinding wood, in which a grindstone, or grinding wheel, is supported on a horizontal shaft in the machine frame and between opposed press boxes which press the material, namely, wood, against the periphery of the grindstone to be ground thereby. According to the present invention, the frame of the machine is so constructed that the side walls of the frame, and all operative parts of the machine disposed in the regions above the grindstone, can be detached from the machine frame and lifted as a unit thereby completely exposing the grindstone from above for easy replacement thereof.
Inventors
- 👤 Helmut Thumm
- 👤 Willy Schaich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:00
CPC Classifications
D; D21; D21B; D21B1/00; D21B1/04; D21B1/06; D21B1/063
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
215 words
In a two press grinder for grinding wood; a frame having side walls, a horizontal shaft extending transversely of the frame and through both of said side walls and having a grindstone thereon between said side walls, each said side wall being formed of portions separable substantially along the horizontal plane of the axis of said shaft, the lower portion of each side wall being stationary and the upper portion thereof beinG liftable upwardly from the said lower portion, means fixedly interconnecting the said upper side wall portions for lifting and lowering movement thereof as a unitary structure, said grinder comprising accessories cooperating with said grindstone during operation of said grinder and those of said accessories located above said plane being carried by the said unitary structure formed by said interconnected upper side wall portions so as to be liftable together therewith whereby said grindstone is completely exposed from above when said unitary structure is lifted from said frame, said grinder also comprising feed chutes disposed on opposite sides of the vertical plane of the axis of said shaft for the supply of wood to be ground to opposite sides of said grindstone, each said upper portion of said side walls having vertical side edges disposed at the sides of said chutes nearest said grindstone.
Claim 2
Dependent Claim
215 words
In a two press grinder for grinding wood; a frame having side walls, a horizontal shaft extending transversely of the frame and through both of said side walls and having a grindstone thereon between said side walls, each said side wall being formed of portions separable substantially along the horizontal plane of the axis of said shaft, the lower portion of each side wall being stationary and the upper portion thereof beinG liftable upwardly from the said lower portion, means fixedly interconnecting the said upper side wall portions for lifting and lowering movement thereof as a unitary structure, said grinder comprising accessories cooperating with said grindstone during operation of said grinder and those of said accessories located above said plane being carried by the said unitary structure formed by said interconnected upper side wall portions so as to be liftable together therewith whereby said grindstone is completely exposed from above when said unitary structure is lifted from said frame, said grinder also comprising feed chutes disposed on opposite sides of the vertical plane of the axis of said shaft for the supply of wood to be ground to opposite sides of said grindstone, each said upper portion of said side walls having vertical side edges disposed at the sides of said chutes nearest said grindstone.
Claim 3
Dependent Claim
54 words
A two press grinder according to claim 1 in which each said feed chute has an upstanding wall on the side facing the other chute, said upper side wall portion being substantially symmetrically formed relative to said vertical plane and each extending to and being connected with the said upstanding walls of said chutes.
Claim 4
Dependent Claim
40 words
A two press grinder according to claim 1 which includes beam members extending transversely of said frame, said means fixedly inter-connecting said side wall portions parallel to said shaft and fixedly connected at the ends to said upperside wall portions.
Claim 5
Dependent Claim
41 words
A two press grinder according to claim 3 in which said beam members are disposed near the corners of said upper side wall portions portions which are disposed at the juncture of said vertical side edges and the top edges thereof.
Claim 6
Dependent Claim
47 words
A two press grinder according to claim 2 in which said upstanding walls of said chutes are substantially vertical and parallel to said vertical plane of the axis of said shaft and are disposed substantially in the planes of said side edges of said upper wall portions.
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) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |