US3871260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for selectively guarding a rotary blade
Assignee: Individual
•
Filing: 1973-10-05
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Granted: 1975-03-18
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Expires: 1993-10-05
Abstract
Abstract Apparatus for guarding and continuously sharpening a rotary cutting blade of the type used with tire truing apparatus. The blade sharpening apparatus includes a rotary grind wheel which is positioned on one side of the blade for continuous sharpening engagement with the cutting edge. The grind wheel is adjustably mounted relative to the blade, and may be resiliently biased into contact therewith. A deburring member engages the other side of the cutting edge, and the deburring member is mounted for effective deburring action irrespective to the direction in which the blade rotates. The blade guard includes a member which normally surrounds a selected portion of the sharp periphery of the blade and which is selectively retractable to expose the blade for cutting purposes.
Inventors
- 👤 J Samuel Rees
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:35
CPC Classifications
B; B23; B23D; B23D71/00; B23D71/02; B23D71/025; B24; B24B; B24B3/00; B24B3/36; B24B3/46; B26; B26D; B26D7/00; B26D7/08; B26D7/12; B26D7/22; Y; Y10; Y10T; Y10T83/00; Y10T83/303; Y10T83/768; Y10T83/7734; Y10T83/869; Y10T83/872; Y10T83/95; Y10T83/96
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
285 words
Apparatus for preventing unwanted contact with the peripheral edge of a rotary cutting blade mounted on a rotary shaft extending from a drive motor, comprising: a blade guard member having a peripheral portion extending in spaced apart annular relation to at least part of the peripheral extent of the peripheral cutting edge; support means connected to said blade guard member to maintain said blade guard member in predetermined relation with said cutting blade; movement guide means mounting said support means for limited movement between a first position placing said peripheral portion of the blade guard member in spaced apart radial confronting position surrounding and preventing contact with said partial peripheral extent of the peripheral cutting edge, and a second position withdrawing said peripheral portion to a position axially spaced from the cutting blade and removed from said surrounding position; said movement guide means comprises a guide passageway mounted alongside the drive motor; said support means comprising a first support rod reciprocally received in said guide passageway and extending to a first end attached to said blade guard member and a second end located remotely of said blade guard member; knob means secured to said second end of said first support rod to impart reciprocal movement of said first support rod in said guide passageway; a second support rod having a first end attached to said blade guard member and a portion extending alongside the drive motor for reciprocal movement in response to sliding movement imparted to said blade guard member by said first support rod; and said first and second rod members being mounted for an extent of reciprocal movement necessary to move said blade guard member to either of said first and second positions.
Claim 2
Dependent Claim
285 words
Apparatus for preventing unwanted contact with the peripheral edge of a rotary cutting blade mounted on a rotary shaft extending from a drive motor, comprising: a blade guard member having a peripheral portion extending in spaced apart annular relation to at least part of the peripheral extent of the peripheral cutting edge; support means connected to said blade guard member to maintain said blade guard member in predetermined relation with said cutting blade; movement guide means mounting said support means for limited movement between a first position placing said peripheral portion of the blade guard member in spaced apart radial confronting position surrounding and preventing contact with said partial peripheral extent of the peripheral cutting edge, and a second position withdrawing said peripheral portion to a position axially spaced from the cutting blade and removed from said surrounding position; said movement guide means comprises a guide passageway mounted alongside the drive motor; said support means comprising a first support rod reciprocally received in said guide passageway and extending to a first end attached to said blade guard member and a second end located remotely of said blade guard member; knob means secured to said second end of said first support rod to impart reciprocal movement of said first support rod in said guide passageway; a second support rod having a first end attached to said blade guard member and a portion extending alongside the drive motor for reciprocal movement in response to sliding movement imparted to said blade guard member by said first support rod; and said first and second rod members being mounted for an extent of reciprocal movement necessary to move said blade guard member to either of said first and second positions.
Claim 3
Dependent Claim
64 words
Apparatus as in claim 1, wherein: said first and second rod members are mounted for said reciprocal movement substantially parallel to said motor shaft; said first ends of both said rod members extend in angular relation to the respective paths of said reciprocal movement, at a location spaced apart from the drive motor toward the cutting blade, for attachment to said blade guard member.
Claim 4
Dependent Claim
56 words
Apparatus as in claim 2, wherein: said first ends of said rod members are attached to said blade guard member at separate spaced apart locations on said peripheral portion; and said first and second rod members are mounted for said reciprocal movement on said spaced apart parallel paths disposed about the exterior of the drive motor.
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) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |