IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0585982
(2017-05-03)
|
등록번호 |
US-10010947
(2018-07-03)
|
발명자
/ 주소 |
- Novak, Joseph Thomas
- Green, Matthew Christopher
|
출원인 / 주소 |
- IRWIN INDUSTRIAL TOOL COMPANY
|
대리인 / 주소 |
Eversheds Sutherland (US) LLP
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
159 |
초록
▼
A hole cutter has a cylindrical blade body including a cutting edge and one or more axially-elongated apertures formed within a side wall of the blade body. The axially-elongated aperture is configured to receive a lever, such as a screwdriver, therethrough. Each axially-elongated aperture includes
A hole cutter has a cylindrical blade body including a cutting edge and one or more axially-elongated apertures formed within a side wall of the blade body. The axially-elongated aperture is configured to receive a lever, such as a screwdriver, therethrough. Each axially-elongated aperture includes a first fulcrum axially spaced adjacent to the cutting edge, a second fulcrum axially spaced further away from the cutting edge than the first fulcrum, and optionally a third fulcrum axially spaced between the first and second fulcrums. A lever, such as a screwdriver, can be inserted into the aperture and placed against each of the fulcrums to lever slugs out of the interior of the blade body.
대표청구항
▼
1. A hole cutter comprising: a substantially cylindrical blade body defining a cutting edge and a longitudinal axis; andat least one axially-elongated aperture formed through the blade body and spaced from the cutting edge such that a portion of the blade body extends between the cutting edge and th
1. A hole cutter comprising: a substantially cylindrical blade body defining a cutting edge and a longitudinal axis; andat least one axially-elongated aperture formed through the blade body and spaced from the cutting edge such that a portion of the blade body extends between the cutting edge and the axially-elongated aperture, the at least one axially-elongated aperture bounded by a bottom edge axially spaced adjacent to the cutting edge, a top edge spaced further away from the cutting edge than the bottom edge, and a side edge connecting the bottom edge to the top edge and oriented at an acute angle to the longitudinal axis of the blade body;wherein the axially-elongated aperture is configured to receive therethrough a lever for removing a work piece slug from an interior of the blade body, and the blade body defines within the axially-elongated aperture a plurality of fulcrums configured for engaging the lever and for levering the slug out of the interior of the blade body by applying a sufficient levering force against the fulcrums to lever the slug towards the cutting edge, the plurality of fulcrums including a first fulcrum axially spaced adjacent to the cutting edge and a second fulcrum axially spaced further away from the cutting edge than the first fulcrum. 2. The hole cutter of claim 1, wherein the lever engages the first fulcrum for leveraging a first slug having a first thickness within a first range of thicknesses out of the blade body. 3. The hole cutter of claim 2, wherein the lever engages the second fulcrum for leveraging a second slug having a second thickness within a second range of thicknesses out of the blade body. 4. The hole cutter of claim 1, further comprising a plurality of axially-elongated apertures formed through the blade body and angularly spaced relative to each other around a circumference of the blade body. 5. The hole cutter of claim 1, wherein the first fulcrum and the second fulcrum are angularly spaced around a circumference of the blade body from each other. 6. The hole cutter of claim 5, wherein the hole cutter defines a direction of rotation that is a cutting direction of the cutting edge, and the first fulcrum and the second fulcrum are angularly spaced around the circumference of the blade body in the direction of rotation in order of decreasing distance from the cutting edge of said fulcrums. 7. The hole cutter of claim 1, wherein the first fulcrum is located at approximately a first end of the aperture and the second fulcrum is located at approximately a second end of the aperture opposite the first end. 8. The hole cutter of claim 1, wherein the axially-elongated aperture is oriented at an acute angle relative to the longitudinal axis of the blade body. 9. The hole cutter of claim 1, wherein a first fulcrum surface defines the first fulcrum and a second fulcrum surface defines the second fulcrum and wherein each of the first fulcrum surface and the second fulcrum surface are oriented parallel to the cutting edge. 10. A hole cutter comprising: a substantially cylindrical blade body defining a cutting edge and a longitudinal axis;a first aperture portion formed through the blade body and spaced from the cutting edge such that a portion of the blade body extends between the cutting edge and the first aperture portion, the first aperture portion configured to receive therethrough a lever for removing a work piece slug from an interior of the blade body and defining a first fulcrum configured for engaging the lever and for levering the slug out of the interior of the blade body by applying a sufficient levering force against the first fulcrum to lever the slug towards the cutting edge;a second aperture portion formed through the blade body and spaced from the cutting edge such that a portion of the blade body extends between the cutting edge and the second aperture portion, the second aperture portion configured to receive therethrough a lever for removing a work piece slug from an interior of the blade body and defining a second fulcrum configured for engaging the lever and for levering the slug out of the interior of the blade body by applying a sufficient levering force against the second fulcrum to lever the slug towards the cutting edge;wherein the first fulcrum is axially spaced from the cutting edge a first distance, the second fulcrum is axially spaced from the cutting edge a second distance that is greater than the first distance, and at least a portion of the first aperture portion and at least a portion of the second aperture portion are aligned along a line substantially parallel to the longitudinal axis; andwherein at least one of the first aperture portion and the second aperture portion is bounded by a bottom edge axially spaced a third distance from the cutting edge, a top edge spaced a fourth distance from the cutting edge greater than the third distance, and a side edge connecting the bottom edge to the top edge and oriented at an acute angle to the longitudinal axis of the blade body. 11. The hole cutter of claim 10, wherein the first aperture portion is in communication with the second aperture portion via a slot portion. 12. The hole cutter of claim 10, wherein the first fulcrum and the second fulcrum are aligned along the line that is substantially parallel to the longitudinal axis. 13. The hole cutter of claim 10, wherein the first fulcrum is defined by a first bottom edge of the first aperture portion that is substantially parallel to the cutting edge. 14. The hole cutter of claim 13, wherein the second fulcrum is defined by a second bottom edge of the second aperture portion that is substantially parallel to the cutting edge. 15. The hole cutter of claim 13, wherein the first aperture portion further includes a first top edge that is generally parallel to the first bottom edge and that is spaced from the cutting edge. 16. The hole cutter of claim 15, wherein the second aperture portion includes a second bottom edge that is generally parallel to the cutting edge and that defines the second fulcrum and second top edge that is generally parallel to the second bottom edge and that is spaced from the cutting edge. 17. The hole cutter of claim 10, wherein each of the first aperture portion and the second aperture defines a minimum width of about 0.27 inch to allow insertion of a number 2 screwdriver therethrough. 18. The hole cutter of claim 10, wherein the second fulcrum is angularly spaced around a circumference of the blade body relative to the first fulcrum. 19. The hole cutter of claim 10, wherein the first aperture portion is axially elongated. 20. The hole cutter of claim 10, wherein the first and second fulcrums are defined by first and second edges of the first and second apertures that are curved, curvilinear, rectilinear, or a combination thereof.
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