US3838543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High speed cut-off wheel
Assignee: Saint Gobain Abrasives Inc
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Filing: 1972-08-24
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Granted: 1974-10-01
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Expires: 1992-08-24
Abstract
Abstract A cut-off wheel is produced by off-center bonding entirely within the body of the wheel of at least one glass cloth disc woven from continuous filament glass roving, or from yarn having a twist of no more than 1.5 turns per inch, the effect of which is to increase the modulus of elasticity of the said wheel, thereby elevating the peripheral speed at which the wheel will begin to flutter and vibrate while in the process of cutting.
Inventors
- 👤 H Lakhani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:18
CPC Classifications
B; B24; B24D; B24D5/00; B24D5/12; B24D5/02; B24D5/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
164 words
A CUT-OFF WHEEL HAVING A DIAMETER TO THICKNESS RATIO OF AT LEAST 40 TO 1 COMPRISING A STRUCTURE IN WHICH THE MODULUS OF ELASTICITY HAS BEEN INCREASED TO MAKE IT CAPABLE OF CUTTING AT HIGHER PERIPHERAL SPEEDS BEFORE THE ONSET OF RESONANT FLUTTER OF THE WHEEL, SAID WHEEL INCLUDING ABRASIVE GRAINS BONDED IN AN ORGANIC POLYMER MATRIX TO FORM A BODY HAVING A PERIPHERY AND SIDE FACES, SAID WHEEL INCLUDING AT LEAST ONE WOVEN GLASS CLOTH DISC HAVING WARP AND WDFT ELEMENTS SURROUNDED BY THE BONDING MATRIX AND DISPOSED TO BE ENTIRELY WITHIN THE BODY, SAID AT LEAST ONE DISC BEING SPACED FROM AND PARALLEL TO THE SIDE FACES OF THE WHEEL, SAID AT LEAST ONE DISC BEING DISPLACED FROM THE CENTER PLANE OF THE THICKNESS DIMENSION OF THE WHEEL AND SAID AT LEAST ONE DISC BEING CHARACTERIZED IN THAT SAID WARP AND WEFT ELEMENTS EACH CONSISTS ESSENTIALLY OF A BUNDLE OF CONTINUOUS FILAMENTS HAVING A TWIST OF NO MORE THAN 1.5 PER INCH.
Claim 2
Dependent Claim
164 words
A CUT-OFF WHEEL HAVING A DIAMETER TO THICKNESS RATIO OF AT LEAST 40 TO 1 COMPRISING A STRUCTURE IN WHICH THE MODULUS OF ELASTICITY HAS BEEN INCREASED TO MAKE IT CAPABLE OF CUTTING AT HIGHER PERIPHERAL SPEEDS BEFORE THE ONSET OF RESONANT FLUTTER OF THE WHEEL, SAID WHEEL INCLUDING ABRASIVE GRAINS BONDED IN AN ORGANIC POLYMER MATRIX TO FORM A BODY HAVING A PERIPHERY AND SIDE FACES, SAID WHEEL INCLUDING AT LEAST ONE WOVEN GLASS CLOTH DISC HAVING WARP AND WDFT ELEMENTS SURROUNDED BY THE BONDING MATRIX AND DISPOSED TO BE ENTIRELY WITHIN THE BODY, SAID AT LEAST ONE DISC BEING SPACED FROM AND PARALLEL TO THE SIDE FACES OF THE WHEEL, SAID AT LEAST ONE DISC BEING DISPLACED FROM THE CENTER PLANE OF THE THICKNESS DIMENSION OF THE WHEEL AND SAID AT LEAST ONE DISC BEING CHARACTERIZED IN THAT SAID WARP AND WEFT ELEMENTS EACH CONSISTS ESSENTIALLY OF A BUNDLE OF CONTINUOUS FILAMENTS HAVING A TWIST OF NO MORE THAN 1.5 PER INCH.
Claim 3
Dependent Claim
44 words
The cut-off wheel of claim 1 containing at least two of said woven glass cloth discs which are oriented in the wheel with the warp and weft of one disc at a 45* angle to the warp and weft of the next adjacent disc.
Claim 4
Dependent Claim
17 words
The cut-off wheel of claim 1 wherein the said organic polymer matrix is a phenol-formaldehyde condensation resin.
Claim 5
Dependent Claim
23 words
The cut-off wheel of claim 1 wherein the said organic polymer matrix is a mixture of hydrocarbon rubber and a phenol-formaldehyde condensation resin.
Claim 6
Dependent Claim
14 words
The cut-off wheel of claim 1 wherein the said organic polymer matrix is shellac.
References Cited (Backward Citations)
US2094556A
Cited
US2763105A
Cited
US2826016A
Cited
US2814918A
Cited
US3208838A
Cited
US3315418A
Cited
US3487589A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |