US3715839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grinding device for the radiused chamfering of an edge of a workpiece
Assignee: Individual
•
Filing: 1971-09-14
•
Granted: 1973-02-13
•
Expires: 1991-09-14
Abstract
Abstract A grinding device for the radiused chamfering of an edge of a workpiece. The grinding device is characterized by a grinding belt progressively drawn from a spool and passed around a pressing surface on a pressing shoe which has a trapezoidal channel profile. A motor, with apparatus which produces an orbital movement for the pressing shoe, is included.
Inventors
- 👤 K Heesemann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:16
CPC Classifications
B; B24; B24B; B24B21/00; B24B21/002
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
177 words
A grinding device for the radiused chamfering of an edge of a workpiece and including: a. a grinding belt drawn from a spool and passed around a pressing surface on a pressing shoe to exert a grinding pressure; b. said pressing shoe defines a channel-like pressure application surface extending in the longitudinal direction of said workpiece edge, the cross-section of which surface is different from the cross-sectional profile of the radius to be ground, said cross-section defining a central region for chamfering a flat on said workpiece, and two lateral regions for radiusing said pressure application surface forming a trapezoidal channel profile; c. a driving motor and means driven thereby for producing circulating (orbital) movement for said pressing shoe, said means comprising an eccentric drive located between said motor shaft and said pressing shoe; d. means for urging said pressing shoe with said grinding belt passed around it towards and away from said workpiece edge at an angle relative to said workpiece surface; and e. means for automatic progressive displacement of said grinding belt along said shoe.
Claim 2
Dependent Claim
177 words
A grinding device for the radiused chamfering of an edge of a workpiece and including: a. a grinding belt drawn from a spool and passed around a pressing surface on a pressing shoe to exert a grinding pressure; b. said pressing shoe defines a channel-like pressure application surface extending in the longitudinal direction of said workpiece edge, the cross-section of which surface is different from the cross-sectional profile of the radius to be ground, said cross-section defining a central region for chamfering a flat on said workpiece, and two lateral regions for radiusing said pressure application surface forming a trapezoidal channel profile; c. a driving motor and means driven thereby for producing circulating (orbital) movement for said pressing shoe, said means comprising an eccentric drive located between said motor shaft and said pressing shoe; d. means for urging said pressing shoe with said grinding belt passed around it towards and away from said workpiece edge at an angle relative to said workpiece surface; and e. means for automatic progressive displacement of said grinding belt along said shoe.
Claim 3
Dependent Claim
177 words
A grinding device for the radiused chamfering of an edge of a workpiece and including: a. a grinding belt drawn from a spool and passed around a pressing surface on a pressing shoe to exert a grinding pressure; b. said pressing shoe defines a channel-like pressure application surface extending in the longitudinal direction of said workpiece edge, the cross-section of which surface is different from the cross-sectional profile of the radius to be ground, said cross-section defining a central region for chamfering a flat on said workpiece, and two lateral regions for radiusing said pressure application surface forming a trapezoidal channel profile; c. a driving motor and means driven thereby for producing circulating (orbital) movement for said pressing shoe, said means comprising an eccentric drive located between said motor shaft and said pressing shoe; d. means for urging said pressing shoe with said grinding belt passed around it towards and away from said workpiece edge at an angle relative to said workpiece surface; and e. means for automatic progressive displacement of said grinding belt along said shoe.
Claim 4
Dependent Claim
177 words
A grinding device for the radiused chamfering of an edge of a workpiece and including: a. a grinding belt drawn from a spool and passed around a pressing surface on a pressing shoe to exert a grinding pressure; b. said pressing shoe defines a channel-like pressure application surface extending in the longitudinal direction of said workpiece edge, the cross-section of which surface is different from the cross-sectional profile of the radius to be ground, said cross-section defining a central region for chamfering a flat on said workpiece, and two lateral regions for radiusing said pressure application surface forming a trapezoidal channel profile; c. a driving motor and means driven thereby for producing circulating (orbital) movement for said pressing shoe, said means comprising an eccentric drive located between said motor shaft and said pressing shoe; d. means for urging said pressing shoe with said grinding belt passed around it towards and away from said workpiece edge at an angle relative to said workpiece surface; and e. means for automatic progressive displacement of said grinding belt along said shoe.
Claim 5
Dependent Claim
73 words
A grinding device as recited in claim 1, wherein said channel-shaped pressing surface of the pressing shoe has three surface regions subtending obtuse angles to one another in cross-section, the central surface region being located in use at a right angle to the angle-bisecting line of the workpiece edge to be chamfered, said central pressing surface section subtending with each of said two outer surface regions, an angle of more than 136* .
Claim 6
Dependent Claim
23 words
A grinding device as recited in claim 2, in which said three surface regions of the pressing shoe surface are of equal width.
Claim 7
Dependent Claim
100 words
A grinding device as recited in claim 1, in which said motor and pressing shoe have a bearing and two supporting straps said straps being interconnected by means of guides extending in the axial direction of said motor, a pressure cylinder acting on said motor to displace said motor in a direction towards or away from said workpiece, means for mounting a bearing for said motor on a bifurcated head, a rod carrying said head, said rod being adjustable in two directions with respect to said workpiece, and a conveyor device adapted to convey said workpiece past said pressing shoe.
Claim 8
Dependent Claim
63 words
A grinding device as recited in claim 4, wherein said pressure cylinder includes a piston axially displacable in said cylinder, two pipes connected so as to supply medium to either side of said piston alternately, and a control valve actuated by said workpiecE, said valve being located in the region of said conveyor device and being connected to a source of pressure medium.
Claim 9
Dependent Claim
64 words
A grinding device as recited in claim 1, wherein said pressing shoe is made of felt with an inserted bracing plate, and is mounted on a plate guiding said grinding belt, resilient suspension members supporting said bracing plate on a carrier plate carrying said motor, and an eccentric causing said orbital movement of said pressing shoe connected to the driving shaft of said motor.
References Cited (Backward Citations)
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US2725691A
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US2835086A
Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |