Patent US4441280A successfully refreshed from Google Patents.
US4441280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for centerless grinding of rotation-symmetrical surfaces on work pieces
Assignee: Schumag AG
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Filing: 1980-12-09
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Granted: 1984-04-10
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Expires: 2000-12-09
Abstract
Abstract Device for centerless grinding of rotation-symmetrical surfaces on workpieces at a grinding station, including drive means for turning a workpiece about the axes of symmetry thereof during grinding, a support bar for supporting the workpiece during turning, a rotatable disc being perpendicular to and disposed on each side of the workpiece generating vibrations of operating frequencies at the grinding station during grinding, at least one of the discs being a grinding wheel operating under grinding pressure, mechanical bearing supports and feed means for the discs forming an oscillating system with the discs generating resonance frequencies, and rigid connecting means for forming a rigid linkage of forces between the bearing supports and for increasing the resonance frequencies of the oscillating system beyond the operating frequencies.
Inventors
- 👤 Walter Wetzels
- 👤 Kurt Crott
- 👤 Erich Voell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:12
CPC Classifications
B; B24; B24B; B24B5/00; B24B5/18; B24B41/00; B24B41/02
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
165 words
Device for centerless grinding of rotation-symmetrical surfaces on workpieces at a grinding station, comprising drive means for turning a workpiece about the axes of symmetry thereof during grinding, a support bar for supporting the workpiece during turning, a rotatable disc being perpendicular to and disposed on each side of the workpiece generating vibrations of operating frequencies at the grinding station during grinding, at least one of said discs being a grinding wheel operating under grinding pressure, mechanical bearing supports and feed means for said discs forming an oscillating system with said discs generating resonance frequencies, and rigid connecting means for forming a direct rigid linkage of forces between said bearing supports and for increasing the resonance frequencies of said oscillating system to the range of approximately 1000 Hz, said range being beyond said operating frequencies, said rigid connecting means being in the form of two side plates, said bearing supports being held in said side plates and said discs being disposed between said side plates.
Claim 2
Dependent Claim
165 words
Device for centerless grinding of rotation-symmetrical surfaces on workpieces at a grinding station, comprising drive means for turning a workpiece about the axes of symmetry thereof during grinding, a support bar for supporting the workpiece during turning, a rotatable disc being perpendicular to and disposed on each side of the workpiece generating vibrations of operating frequencies at the grinding station during grinding, at least one of said discs being a grinding wheel operating under grinding pressure, mechanical bearing supports and feed means for said discs forming an oscillating system with said discs generating resonance frequencies, and rigid connecting means for forming a direct rigid linkage of forces between said bearing supports and for increasing the resonance frequencies of said oscillating system to the range of approximately 1000 Hz, said range being beyond said operating frequencies, said rigid connecting means being in the form of two side plates, said bearing supports being held in said side plates and said discs being disposed between said side plates.
Claim 3
Dependent Claim
19 words
Device according to claim 1, wherein said side plates have cutouts formed therein for the passage of elongated workpieces.
Claim 4
Dependent Claim
18 words
Device according to claim 1, wherein said connecting piece and support bar are firmly connected to each other.
Claim 5
Dependent Claim
148 words
Device for centerless grinding of rotation-symmetrical surfaces on workpieces at a grinding station, comprising drive means for turning a workpiece about the axes of symmetry thereof during grinding, a support bar for supporting the workpiece during turning, a rotatable disc being perpendicular to and diposed on each side of the workpiece generating vibrations of operating frequencies at the grinding station during grinding, at least one of said discs being a grinding wheel operating under grinding pressure, mechanical bearing supports and feed means for said discs forming an oscillating system with said discs generating resonance frequencies, and rigid connecting means for forming a direct rigid linkage of forces between said bearing supports and for increasing the resonance frequencies of said oscillating system to the range of approximately 1000 Hz, said range being beyond said operating frequencies, said connecting means being in the form of at least one rigid rod.
Claim 6
Dependent Claim
148 words
Device for centerless grinding of rotation-symmetrical surfaces on workpieces at a grinding station, comprising drive means for turning a workpiece about the axes of symmetry thereof during grinding, a support bar for supporting the workpiece during turning, a rotatable disc being perpendicular to and diposed on each side of the workpiece generating vibrations of operating frequencies at the grinding station during grinding, at least one of said discs being a grinding wheel operating under grinding pressure, mechanical bearing supports and feed means for said discs forming an oscillating system with said discs generating resonance frequencies, and rigid connecting means for forming a direct rigid linkage of forces between said bearing supports and for increasing the resonance frequencies of said oscillating system to the range of approximately 1000 Hz, said range being beyond said operating frequencies, said connecting means being in the form of at least one rigid rod.
Claim 7
Dependent Claim
23 words
Device according to claim 4, wherein said bearing supports include sliders directly connected to said rigid rod and a slideaway for said sliders.
Claim 8
Dependent Claim
28 words
Device according to claim 5, wherein said slideway is a frame having long and short sides, said sliders being slideably guided between said long sides of said slideway.
Claim 9
Dependent Claim
27 words
Device according to claim 6, wherein said connecting means are in the form of rigid abutments disposed between said sliders and said short sides of said frame.
Claim 10
Dependent Claim
14 words
Device according to claim 6, 4 or 7, wherein said connecting means are adjustable.
Claim 11
Dependent Claim
18 words
Device according to claim 8, wherein said connecting means consists of one screw spindle for setting said sliders.
Claim 12
Dependent Claim
30 words
Device according to claim 9, wherein said at least one screw spindle is in the form of at least two screw spindles being symmetrically disposed with respect to said sliders.
Claim 13
Dependent Claim
16 words
Device according to claim 5, wherein said sliders include means for producing vibration damping dosed friction.
Claim 14
Dependent Claim
28 words
Device according to claim 4, including swinging arms supporting said discs and having free ends, and a one-piece screw spindle directly connecting said free ends to each other.
Claim 15
Dependent Claim
31 words
Device according to claim 4, including sliders, supports mounted on said sliders, a slideway for said sliders, and said rigid rod being screw spindles directly connecting said supports to each other.
References Cited (Backward Citations)
US577907A
Cited
US587395A
Cited
US963610A
Cited
US2073079A
Cited
US3209498A
Cited
US3967515A
Cited
US4063906A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-10 | 1987-10-10 | 1988-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-10 | 1991-10-10 | 1992-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-10 | 1995-10-10 | 1996-04-10 | $7700.00 | Window Closed / Lapsed |