US4034452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Router bit
Assignee: Individual
•
Filing: 1976-04-12
•
Granted: 1977-07-12
•
Expires: 1996-04-12
Abstract
Abstract An improved router bit that has numerous advantages over conventional router bits; the bit of the present invention allowing chips to fall through quite readily, making a smoother cut and having other advantages; the bit having two or more flutes, one of the flutes having a cutting edge with a radius of conventional bits, the other flute or flutes being radially shorter, thus giving such flute or flutes a less circular limit.
Inventors
- 👤 J. Walter Edming
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:33
CPC Classifications
B; B23; B23C; B23C5/00; B23C5/02; B23C5/10; Y; Y10; Y10T; Y10T407/00; Y10T407/19; Y10T407/1946; Y10T407/1948; Y10T408/00; Y10T408/89; Y10T408/907
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
140 words
A router bit for use in a routing machine to route a work piece comprising; a. an elongated straight shank having one end adapted to fit into a chuck of said machine; b. a routing head integral with and at the other end of said shank having one conventional flute and an opposing shorter flute of length less than the radius of said conventional flute; and c. a tip portion extending from said opposing flute extending radially outward from said shorter flute equal to the radius of said shank whereby said router bit permits routed chips to fall readily through said workpiece while making a smooth cut, requiring minimal effort in routing in addition to reduced friction, heat, and back pressure in said router bit attempting to overcome compaction of said material resulting in said router bit maintaining its sharpness.
Claim 2
Dependent Claim
140 words
A router bit for use in a routing machine to route a work piece comprising; a. an elongated straight shank having one end adapted to fit into a chuck of said machine; b. a routing head integral with and at the other end of said shank having one conventional flute and an opposing shorter flute of length less than the radius of said conventional flute; and c. a tip portion extending from said opposing flute extending radially outward from said shorter flute equal to the radius of said shank whereby said router bit permits routed chips to fall readily through said workpiece while making a smooth cut, requiring minimal effort in routing in addition to reduced friction, heat, and back pressure in said router bit attempting to overcome compaction of said material resulting in said router bit maintaining its sharpness.
Claim 3
Dependent Claim
21 words
A router bit of claim 1 wherein the length of said conventional flute is greater than the radius of said shank.
Claim 4
Dependent Claim
21 words
A router bit of claim 1 wherein the length of said conventional flute is equal to the radius of said shank.
Claim 5
Dependent Claim
21 words
A router bit of claim 1 wherein the length of said convention flute is less than the radius of said shank.
Claim 6
Dependent Claim
13 words
A router bit of claim 1 further comprising a plurality of conventional flutes.
Claim 7
Dependent Claim
13 words
A router bit of claim 1 further comprising a plurality of shorter flutes.
Claim 8
Dependent Claim
21 words
A router bit of claim 1 further comprising a plurality of conventional and shorter flutes being positioned adjacent to each other.
Claim 9
Dependent Claim
26 words
A router bit of claim 1 further comprising a plurality of conventional and shorter flutes, said conventional and shorter flutes being alternately spaced on said shank.
Claim 10
Dependent Claim
22 words
A router bit of claim 1 wherein said tip portion is located in the middle of the length of said shorter flute.
Claim 11
Dependent Claim
19 words
A router bit of claim 1 wherein said tip portion is located at the end of said shorter flute.
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) | 1980-07-11 | 1981-01-10 | 1981-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-11 | 1985-01-10 | 1985-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-11 | 1989-01-10 | 1989-07-12 | $7700.00 | Window Closed / Lapsed |