US3690568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wood grinding
Assignee: Koehring Waterous Ltd
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Filing: 1970-11-17
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Granted: 1972-09-12
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Expires: 1990-11-17
Abstract
Abstract Wood is ground by forcing the wood against a grinding wheel rotated by a source of power, cooling the grinding area with a flow of cooling fluid and maintaining the energy supplied by the source of power per unit weight of ground wood at a substantially constant value.
Inventors
- 👤 Donald K Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:29
CPC Classifications
D; D21; D21B; D21B1/00; D21B1/04; D21B1/06; D21B1/063
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
76 words
A method of grinding wood including forcing the wood against a grinding wheel rotated by a source of power, cooling the grinding area with a flow of cooling fluid, maintaining the energy supplied by the source of power per unit weight of ground wood at a substantially constant value, and maintaining the ratio of the rate of grinding to the force with which the wood is urged against the grinding wheel at a substantially constant value.
Claim 2
Independent Claim
71 words
A method of grinding wood including forcing the wood against a grinding wheel rotated by a source of power, cooling the grinding area with a flow of cooling fluid, maintaining the energy supplied by the source of power per unit weight of ground wood at a substantially constant value, and maintaining the ratio of the rate of grinding to the rate of flow of cooling fluid at a substantially constant value.
Claim 3
Independent Claim
97 words
A method of grinding wood including forcing the wood against a grinding wheel rotated by a source of power, cooling the grinding area with a flow of cooling fluid, maintaining the energy supplied by the source of power per unit weight of ground wood at a substantially constant value, maintaining the ratio of the rate of grinding to the force with which the wood is urged against the grinding wheel at a substantially constant value, and maintaining the ratio of the rate of grinding to the rate of flow of cooling fluid at a substantially constant value.
Claim 4
Independent Claim
127 words
A method of grinding wood including forcing the wood against a grinding wheel rotated by a source of power, cooling the grinding area with a flow of cooling fluid, measuring the rate of grinding, measuring the force with which the wood is urged against the grinding wheel, measuring the rate of flow of cooling fLuid, varying said force to maintain the ratio of the rate of grinding to said force at a substantially constant value, and varying the rate of flow of cooling fluid to maintain the ratio of the rate of grinding to the rate of flow of cooling fluid at a substantially constant value, thereby maintaining the energy supplied by the source of power per unit weight of ground wood at a substantially constant value.
Claim 5
Independent Claim
106 words
A method of grinding wood including forcing the wood against a grinding wheel rotated by a source of power, cooling the grinding area with a flow of cooling fluid, measuring the energy from the source of power, measuring the rate of grinding, measuring the rate of flow of cooling fluid, varying the power source to maintain the energy supplied by the source of power per unit weight of ground wood at a substantially constant value, and varying the rate of flow of cooling fluid to maintain the ratio of the rate of grinding to the rate of flow of cooling fluid at a substantially constant value.
Claim 6
Independent Claim
101 words
A method of grinding wood including forcing the wood against a grinding wheel rotated by a source of power, cooling the grinding area with a flow of cooling fluid, measuring the energy from the power source, measuring the rate of grinding, measuring the force with which the wood is urged against the grinding wheel, varying the power source to maintain the energy supplied by the source of power per unit weight of ground wood at a substantially constant value, and varying the grinding force to maintain the ratio of the rate of grinding to said force at a substantially constant value.
Claim 7
Dependent Claim
54 words
A wood grinding assembly including a rotatable grinding wheel, a source of power for rotating the grinding wheel, means for forcing the wood against the grinding wheel, means for supplying cooling fluid to the grinding area, and means for maintaining the energy supplied per unit weight of ground wood at a substantially constant value.
Claim 8
Dependent Claim
87 words
A wood grinding assembly including a rotatable grinding wheel, a source of power for rotating the grinding wheel, means for forcing the wood against the grinding wheel, means for supplying cooling fluid to the grinding wheel, means for maintaining the energy supplied by the source of power per unit weight of ground wood at a substantially constant value, and means for maintaining the ratio of the rate of grinding to the force with which the wood is urged against the grinding wheel at a substantially constant value.
Claim 9
Dependent Claim
82 words
A wood grinding assembly including a rotatable grinding wheel, a source of power for rotating the grinding wheel, means for forcing the wood against the grinding wheel, means for supplying cooling fluid to the grinding area, means for maintaining the energy supplied by the source of power per unit weight of ground wood at a substantially constant value, and means for maintaining the ratio of the rate of grinding to the rate of flow of cooling fluid at a substantially constant value.
Claim 10
Dependent Claim
110 words
A wood grinding assembly including a rotatable grinding wheel, a source of power for rotating the grinding wheel, means for forcing the wood against the grinding wheel, means for supplying cooling fluid to the grinding area, means for maintaining the energy supplied by the source of power per unit weight of ground wood at a substantially constant value, means for maintaining the ratio of the rate of grinding to the force with which the wood is urged against the grinding wheel at a substantially constant value, and means for maintaining the ratio of the rate of grinding to the rate of flow of cooling fluid at a substantially constant value.
Claim 11
Dependent Claim
144 words
A wood grinding assembly including a rotatable grinding wheel, a source of power for rotating the grinding wheel, means for forcing the wood against the grinding wheel, means for supplying cooling fluid to the grinding area, means for measuring the rate of grinding, means for measuring the force with which the wood is urged against the grinding wheel, means for measuring the rate of flow of cooling fluid, means for varyiNg said force to maintain the ratio of the rate of grinding to said force at a substantially constant value, and means for varying the rate of flow of cooling fluid to maintain the ratio of the rate of grinding to the rate of flow of cooling fluid at a substantially constant value, thereby maintaining the energy supplied by the source of power per unit weight of ground wood at a substantially constant value.
Claim 12
Dependent Claim
123 words
A wood grinding assembly including a rotatable grinding wheel, a source of power for rotating the grinding wheel, means for forcing the wood against the grinding wheel, means for supplying cooling fluid to the grinding area, means for measuring the energy from the source of power, means for measuring the rate of grinding, means for measuring the rate of flow of cooling fluid, means for varying the power source to maintain the energy supplied by the source of power per unit weight of ground wood at a substantially constant value, and means for varying the rate of flow of cooling fluid to maintain the ratio of the rate of grinding to the rate of flow of cooling fluid at a substantially constant value.
Claim 13
Dependent Claim
118 words
A wood grinding assembly including a rotatable grinding wheel, a source of power for rotating the grinding wheel, means for forcing the wood against the grinding wheel, means for supplying cooling fluid to the grinding area, means for measuring the energy from the power source, means for measuring the rate of grinding, means for measuring the force with which the wood is urged against the grinding wheel, means for varying the power source to maintain the energy supplied by the source of power per unit weight of ground wood at a substantially constant value, and means for varying the grinding force to maintain the ratio of the rate of grinding to said force at a substantially constant value.
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 |