Powered cutting saw system

• US 6,021,826 A
• Filed: 05/19/1998
• Issued: 02/08/2000
• Est. Priority Date: 05/19/1997
• Status: Expired due to Fees

• Current Assignee: Stephen S. Daniell.
• Original Assignee: Stephen S. Daniell.
• Inventors: Daniell, Stephen S.
• Primary Examiner(s): BRAY, WAYMOND D
• Application Number:
  US09/081,007
• Time in Patent Office: 630 Days
• Field of Search: 83/830-836, 30/371, 30/373, 30/374, 30/375, 30/377, 30/495, 403/292, 403/294, 403/298, 403/408.1, 144/72, 144/73, 144/136.95, 144/154.5, 144/363, 144/368
• US Class Current: 144/73
• CPC Class Codes: A47B 2230/0059 Biscuits
• CPC Class Codes: B27B 17/04 Roller bearing guides
• CPC Class Codes: B27B 33/14 Saw chains saw chains for slotting or mortising devices B27F5/08
• CPC Class Codes: B27F 5/023 Portable plate joiners
• CPC Class Codes: B27F 5/06 equipped with chain cutters chain saws in general B27B17/00
• CPC Class Codes: B27G 19/003 for chain saws braking devices B27B17/08
• CPC Class Codes: B27G 19/02 for circular saws
• CPC Class Codes: B27G 19/10 Measures preventing splintering of sawn portions of wood
• CPC Class Codes: F16B 12/04 Non-loosenable joints for non-metal furniture parts, e.g. glued
• CPC Class Codes: Y10T 403/55 Member ends joined by inserted section
• CPC Class Codes: Y10T 403/559 Fluted or splined section
• CPC Class Codes: Y10T 403/75 having a joining piece extending through aligned openings in plural members
• CPC Class Codes: Y10T 83/909 Cutter assemblage or cutter element therefor [e.g., chain saw chain]
• CPC Class Codes: Y10T 83/925 Having noncutting depth gauge

Abstract

A plate-joinery system includes a chain-saw plate joiner where the cutting mechanism includes a cutting-chain driven about a saw-bar. The cutting mechanism of the chain-saw plate joiner may be advanced on rails to one of a set of predetermined depths. The increased recess depth allowed by the chain-saw and the resultant increase in both glueable surface area and mechanical engagement permit high-strength right-angle joints to be made with the speed of conventional plate-joinery. Plate-joints of more conventional proportion may also be made. The plate joinery system also includes specialty plate configurations and compatible fasteners that permit many joints to be rapidly assembled without resort to either manual glue application or external clamps. A series of high-precision, low-friction cutting devices suitable for general introduction is also described.

Claims

1. A cutting saw, comprising:

a motor that induces rotary motion in a shaft;

a plate that is mounted to the shaft so that the shaft can be held stationary relative to the plate on all axes except a longitudinal axis of the shaft, whereby the shaft can be freely rotated about the longitudinal axis of the shaft;

an elongated saw-bar mounted to the plate, the saw-bar having a perimeter;

a cutting-chain entrained about the perimeter of the saw-bar and about the shaft so that rotation of the shaft induces rotary motion of the cutting-chain about the perimeter of the saw-bar, the cutting-chain including at least one tooth that is capable of removing solid material;

a base that is slidably mounted to the plate to permit the plate to move relative to the base between a first position and a second position; and

a depth stop that limits movement of the plate relative to the base to a plurality of third positions that are between the first and second positions;

wherein the base encloses the saw-bar and the cutting-chain in the first position, and wherein the base encloses only a portion of the saw-bar and the cutting-chain in the second position.

2. A cutting saw, comprising:

a motor that induces rotary motion in a shaft;

a plate that is mounted to the shaft so that the shaft can be held stationary relative to the plate on all axes except a longitudinal axis of the shaft, whereby the shaft can be freely rotated about the longitudinal axis of the shaft;

an elongated saw-bar mounted to the plate, the saw-bar having a perimeter;

a cutting-chain entrained about the perimeter of the saw-bar and about the shaft so that rotation of the shaft induces rotary motion of the cutting-chain about the perimeter of the saw-bar, the cutting-chain including at least one tooth that is capable of removing solid material;

a base that is slidably mounted to the plate to permit the plate to move relative to the base between a first position and a second position; and

a depth stop that limits movement of the plate relative to the base to at least one third position that is between the first and second positions;

wherein the base encloses the saw-bar and the cutting-chain in the first position, and wherein the base encloses only a portion of the saw-bar and the cutting-chain in the second position; and

wherein the depth stop includes means for finely adjusting the at least one third position.

3. A cutting saw, comprising:

a motor that induces rotary motion in a shaft;

a plate that is mounted to the shaft so that the shaft can be held stationary relative to the plate on all axes except a longitudinal axis of the shaft, whereby the shaft can be freely rotated about the longitudinal axis of the shaft;

an elongated saw-bar mounted to the plate, the saw-bar having a perimeter;

a cutting-chain entrained about the perimeter of the saw-bar and about the shaft so that rotation of the shaft induces rotary motion of the cutting-chain about the perimeter of the saw-bar, the cutting-chain including at least one tooth that is capable of removing solid material;

a base that is slidably mounted to the plate to permit the plate to move relative to the base between a first position and a second position; and

a depth stop that limits movement of the plate relative to the base to at least one third position that is between the first and second positions;

wherein the base encloses the saw-bar and the cutting-chain in the first position, and wherein the base encloses only a portion of the saw-bar and the cutting-chain in the second position; and

wherein the depth stop includes a sliding bolt.

4. A cutting saw, comprising:

a motor that induces rotary motion in a shaft;

a plate that is mounted to the shaft so that the shaft can be held stationary relative to the plate on all axes except a longitudinal axis of the shaft, whereby the shaft can be freely rotated about the longitudinal axis of the shaft;

an elongated saw-bar mounted to the plate, the saw-bar having a perimeter;

a cutting-chain entrained about the perimeter of the saw-bar and about the shaft so that rotation of the shaft induces rotary motion of the cutting-chain about the perimeter of the saw-bar, the cutting-chain including at least one tooth that is capable of removing solid material; and

a base that is slidably mounted to the plate to permit the plate to move relative to the base between a first position and a second position;

wherein the base encloses the saw-bar and the cutting-chain in the first position, and

wherein the base encloses only a portion of the saw-bar and the cutting-chain in the second position; and

wherein the plate includes at least one mounting feature that permits the plate to be mounted on a stationary stand.

5. The cutting saw of claim 4, wherein the at least one mounting features includes a pair of gear racks overhanging an edge of the plate and spaced apart from the shaft and the saw bar.

6. A cutting saw, comprising:

a motor that induces rotary motion in a shaft;

a plate that is mounted to the shaft so that the shaft can be held stationary relative to the plate on all axes except a longitudinal axis of the shaft, whereby the shaft can be freely rotated about the longitudinal axis of the shaft;

an elongated saw-bar mounted to the plate, the saw-bar having a perimeter;

a cutting-chain entrained about the perimeter of the saw-bar and about the shaft so that rotation of the shaft induces rotary motion of the cutting-chain about the perimeter of the saw-bar, the cutting-chain including at least one tooth that is capable of removing solid material; and

a base that is slidably mounted to the plate to permit the plate to move relative to the base between a first position and a second position;

wherein the base encloses the saw-bar and the cutting-chain in the first position, and wherein the base encloses only a portion of the saw-bar and the cutting-chain in the second position;

wherein the base has a forward edge and a rearward edge, the saw-bar and the cutting-chain being enclosed within the forward and rearward edges of the base when the plate is in the first position and only the portion of the saw-bar and the cutting-chain being enclosed within the forward and rearward edges of the base when the plate is in the second position, and wherein the forward edge of the base include an opening that permits the remaining portion of the saw-bar and the cutting-chain to protrude therethrough when the plate is in the second position; and

wherein a rearward portion of the base that is proximate to the rearward edge includes a plurality of curved vanes that deflect the solid material removed by the at least one tooth in a predetermined direction.

7. The cutting saw of claim 6, wherein the plurality of curved vanes are spaced apart from each other by a distance that permits the solid material to be deflected out of the base without permitting the cutting-chain to be deflected out of the base if the cutting-chain breaks during operation.

8. A cutting saw, comprising:

a motor that induces rotary motion in a shaft;

a plate that is mounted to the shaft so that the shaft can be held stationary relative to the plate on all axes except a longitudinal axis of the shaft, whereby the shaft can be freely rotated about the longitudinal axis of the shaft;

an elongated saw-bar mounted to the plate, the saw-bar having a perimeter;

a cutting-chain entrained about the perimeter of the saw-bar and about the shaft so that rotation of the shaft induces rotary motion of the cutting-chain about the perimeter of the saw-bar, the cutting-chain including at least one tooth that is capable of removing solid material; and

a base that is slidably mounted to the plate to permit the plate to move relative to the base between a first position and a second position;

wherein the base encloses the saw-bar and the cutting-chain in the first position, and wherein the base encloses only a portion of the saw-bar and the cutting-chain in the second position;

wherein the base has a forward edge and a rearward edge, the saw-bar and the cutting-chain being enclosed within the forward and rearward edges of the base when the plate is in the first position and only the portion of the saw-bar and the cutting-chain being enclosed within the forward and rearward edges of the base when the plate is in the second position, and wherein the forward edge of the base include an opening that permits the remaining portion of the saw-bar and the cutting-chain to protrude therethrough when the plate is in the second position; and

wherein the forward edge of the base includes a substantially planar reference face that is perpendicular to the saw-bar.

9. The cutting saw of claim 8, wherein the substantially planar reference face includes a plurality of raised surfaces to engage with a work-piece and prevent lateral displacement of the cutting saw when the planar reference face is place in contact with a surface of the work-piece.

10. The cutting saw of claim 9, wherein the plurality of raised surfaces include rubber friction pads.

11. The cutting saw of claim 8, further comprising a second substantially planar reference face that is mounted to the base proximate to the forward edge of the plate, so that the substantially planar reference face and the second substantially planar reference face may be abutted to distinct planar regions of a work-piece.

12. The cutting saw of claim 11, wherein the second substantially planar reference face is mounted to the base at a fixed angle relative to the substantially planar reference face.

13. The cutting saw of claim 12, wherein the fixed angle is 90 degrees.

14. The cutting saw of claim 12, wherein the fixed angle is 45 degrees.

15. The cutting saw of claim 11, wherein the second substantially planar reference face is adjustably mounted to the base so that an angle between the second substantially planar reference face and the substantially planar reference face can be altered.

16. The cutting saw of claim 11, further comprising an armature that is rigidly mounted to the base proximate to the forward edge of the plate, the armature being mounted parallel to the substantially planar reference face;

wherein the second substantially planar reference face is movably mounted to the armature so that the second substantially planar reference face can be moved toward and away from the substantially planar reference face along the armature.

17. The cutting saw of claim 16, wherein the second substantially planar reference is further movably mounted to the armature so that an angle between the second substantially planar reference face and the substantially planar reference face can be altered.

18. The cutting saw of claim 11, wherein the second substantially planar reference face includes a blade housing that conforms to a shape of the remaining portion of the saw-bar and the cutting-chain when the plate is in the second position.

19. The cutting saw of claim 18, wherein the blade housing includes a window that permits the saw-blade and the cutting-chain to be visible as the plate moves from the first position toward the second position.

20. A cutting saw, comprising:

a motor that induces rotary motion in a shaft;

a plate that is mounted to the shaft so that the shaft can be held stationary relative to the plate on all axes except a longitudinal axis of the shaft, whereby the shaft can be freely rotated about the longitudinal axis of the shaft;

an elongated saw-bar mounted to the plate, the saw-bar having a perimeter;

a cutting-chain entrained about the perimeter of the saw-bar and about the shaft so that rotation of the shaft induces rotary motion of the cutting-chain about the perimeter of the saw-bar, the cutting-chain including at least one tooth that is capable of removing solid material; and

a base that is slidably mounted to the plate to permit the plate to move relative to the base between a first position and a second position;

wherein the base encloses the saw-bar and the cutting-chain in the first position, and wherein the base encloses only a portion of the saw-bar and the cutting-chain in the second position;

wherein the base has a forward edge and a rearward edge, the saw-bar and the cutting-chain being enclosed within the forward and rearward edges of the base when the plate is in the first position and only the portion of the saw-bar and the cutting-chain being enclosed within the forward and rearward edges of the base when the plate is in the second position, and wherein the forward edge of the base include an opening that permits the remaining portion of the saw-bar and the cutting-chain to protrude therethrough when the plate is in the second position; and

wherein the base includes at least one gate that is slidably disposed in the opening in the forward edge of the base, the gate being movable between a third position and a fourth position, the third position minimizing a size of the opening in the forward edge of the base and the fourth position maximizing the size of the opening in the forward edge of the base.

21. The cutting saw of claim 20, further comprising at least one linkage arm pivotally connected to the at least one gate and the plate that moves that at least one gate from the third position to the fourth position when the plate moves from the first position to the second position.

22. The cutting saw of claim 21, wherein the at least one gate has an outer surface that is coplanar with the forward edge of the base throughout its movement between the third position and the fourth position.

23. The cutting saw of claim 20, wherein the at least one gate slides between the third position and the fourth position just outside a path of the cutting-chain to minimize tear-out.

24. A cutting saw, comprising:

a motor that induces rotary motion in a shaft;

a plate that is mounted to the shaft so that the shaft can be held stationary relative to the plate on all axes except a longitudinal axis of the shaft, whereby the shaft can be freely rotated about the longitudinal axis of the shaft;

an elongated saw-bar mounted to the plate, the saw-bar having a perimeter;

a cutting-chain entrained about the perimeter of the saw-bar and about the shaft so that rotation of the shaft induces rotary motion of the cutting-chain about the perimeter of the saw-bar, the cutting-chain including at least one tooth that is capable of removing solid material; and

a base that is slidably mounted to the plate to permit the plate to move relative to the base between a first position and a second position;

wherein the base encloses the saw-bar and the cutting-chain in the first position, and wherein the base encloses only a portion of the saw-bar and the cutting-chain in the second position; and

wherein an extended portion of the saw-bar and the cutting-chain that is not enclosed by the base when the plate is in the second position includes three geometrically distinct perimeter arcs, the three distinct perimeter arcs including a nose-arc and two side-arcs, the two side-arcs being equal to one another, opposite in orientation, positive in curvature, and substantially continuous with and substantially tangent to the nose-arc at points of connection between the three distinct perimeter arcs.

25. The cutting saw of claim 24, wherein a radius of the nose-arc is substantially one-quarter a radius of each of the two side-arcs.

26. A cutting saw, comprising:

a motor that induces rotary motion in a shaft;

a plate that is mounted to the shaft so that the shaft can be held stationary relative to the plate on all axes except a longitudinal axis of the shaft, whereby the shaft can be freely rotated about the longitudinal axis of the shaft;

an elongated saw-bar mounted to the plate, the saw-bar having a perimeter;

a cutting-chain entrained about the perimeter of the saw-bar and about the shaft so that rotation of the shaft induces rotary motion of the cutting-chain about the perimeter of the saw-bar, the cutting-chain including at least one tooth that is capable of removing solid material; and

a base that is slidably mounted to the plate to permit the plate to move relative to the base between a first position and a second position;

wherein the base encloses the saw-bar and the cutting-chain in the first position, and wherein the base encloses only a portion of the saw-bar and the cutting-chain in the second position;

wherein the motor includes a switch having a first state that permits the motor to induce rotary motion in the shaft and a second state that prevents the motor from inducing rotary motion in the shaft;

wherein the base includes an upper base and a lower base that are mechanically coupled together to form the base; and

wherein separation of the upper base from the lower base sets the switch to the second state.

27. A cutting saw, comprising:

a motor that induces rotary motion in a shaft;

a plate that is mounted to the shaft so that the shaft can be held stationary relative to the plate on all axes except a longitudinal axis of the shaft, whereby the shaft can be freely rotated about the longitudinal axis of the shaft;

an elongated saw-bar mounted to the plate, the saw-bar having a perimeter;

a cutting-chain entrained about the perimeter of the saw-bar and about the shaft so that rotation of the shaft induces rotary motion of the cutting-chain about the perimeter of the saw-bar, the cutting-chain including at least one tooth that is capable of removing solid material;

a base that is slidably mounted to the plate to permit the plate to move relative to the base between a first position and a second position; and

a plurality of freely-turning bearings interposed between the cutting chain and the saw-bar, so that when tension is introduced between the cutting chain and the saw-bar, a majority of the tension is borne by the bearings;

wherein the base encloses the saw-bar and the cutting-chain in the first position, and wherein the base encloses only a portion of the saw-bar and the cutting-chain in the second position.

28. The cutting saw of claim 27, wherein the plurality of freely-turning bearings is retained on the cutting chain.

29. The cutting saw of claim 27, wherein the plurality of freely-turning bearings is retained on the saw-bar.

30. The cutting saw of claim 27, further comprising:

a flexible bearing band surrounding each of the plurality of freely-turning bearings, that retains the plurality of freely-turning bearings about the perimeter of the saw-bar.

31. A cutting saw, comprising:

a motor that induces rotary motion in a shaft;

a plate that is mounted to the shaft so that the shaft can be held stationary relative to the plate on all axes except a longitudinal axis of the shaft, whereby the shaft can be freely rotated about the longitudinal axis of the shaft;

an elongated saw-bar mounted to the plate, the saw-bar having a perimeter;

a cutting-chain entrained about the perimeter of the saw-bar and about the shaft so that rotation of the shaft induces rotary motion of the cutting-chain about the perimeter of the saw-bar, the cutting-chain including at least one tooth that is capable of removing solid material; and

a base that is slidably mounted to the plate to permit the plate to move relative to the base between a first position and a second position;

wherein the base encloses the saw-bar and the cutting-chain in the first position, and wherein the base encloses only a portion of the saw-bar and the cutting-chain in the second position; and

wherein the cutting-chain includes a plurality of links including a first link and a second link, the first link having a leading edge and the second link having a trailing edge, and wherein the leading edge of the first link and the trailing edge of the second link have complementary mating surfaces, the complementary mating surfaces inducing articulation between the first link and the second link as the cutting-chain rotates about the perimeter of the saw-bar.

32. A cutting saw, comprising:

a motor that induces rotary motion in a shaft;

a plate that is mounted to the shaft so that the shaft can be held stationary relative to the plate on all axes except a longitudinal axis of the shaft, whereby the shaft can be freely rotated about the longitudinal axis of the shaft;

an elongated saw-bar mounted to the plate, the saw-bar having a perimeter;

a cutting-chain entrained about the perimeter of the saw-bar and about the shaft so that rotation of the shaft induces rotary motion of the cutting-chain about the perimeter of the saw-bar, the cutting-chain including at least one tooth that is capable of removing solid material; and

a base that is slidably mounted to the plate to permit the plate to move relative to the base between a first position and a second position;

wherein the base encloses the saw-bar and the cutting-chain in the first position, and wherein the base encloses only a portion of the saw-bar and the cutting-chain in the second position; and

wherein the complementary mating surfaces of the leading edge of the first link and the trailing edge of the second link include at least one recess and at least one protrusion.

33. A cutting saw, comprising:

a motor that induces rotary motion in a shaft;

a plate that is mounted to the shaft so that the shaft can be held stationary relative to the plate on all axes except a longitudinal axis of the shaft, whereby the shaft can be freely rotated about the longitudinal axis of the shaft;

an elongated saw-bar mounted to the plate, the saw-bar having a perimeter;

a cutting-chain entrained about the perimeter of the saw-bar and about the shaft so that rotation of the shaft induces rotary motion of the cutting-chain about the perimeter of the saw-bar, the cutting-chain including at least one tooth that is capable of removing solid material; and

a base that is slidably mounted to the plate to permit the plate to move relative to the base between a first position and a second position;

wherein the base encloses the saw-bar and the cutting-chain in the first position, and wherein the base encloses only a portion of the saw-bar and the cutting-chain in the second position; and

wherein the cutting-chain includes a plurality of successive links, each respective link of the plurality of successive links including a first stop that prevents articulation between the respective link and the immediately preceding link greater than a predetermined radius.

34. The cutting chain of claim 33, wherein each respective link of the plurality of successive links includes a second stop that prevents articulation between the respective link and an immediately following link greater than the predetermined radius.

35. A cutting saw, comprising:

a motor that induces rotary motion in a shaft;

a plate that is mounted to the shaft so that the shaft can be held stationary relative to the plate on all axes except a longitudinal axis of the shaft, whereby the shaft can be freely rotated about the longitudinal axis of the shaft;

an elongated saw-bar mounted to the plate, the saw-bar having a perimeter;

a cutting-chain entrained about the perimeter of the saw-bar and about the shaft so that rotation of the shaft induces rotary motion of the cutting-chain about the perimeter of the saw-bar, the cutting-chain including at least one tooth that is capable of removing solid material; and

a plurality of freely-turning bearings interposed between the cutting chain and the saw-bar, so that when tension is introduced between the cutting chain and the saw-bar, a majority of the tension is borne by the bearings.

36. The cutting saw of claim 35, wherein the plurality of freely-turning bearings is retained on the cutting chain.

37. The cutting saw of claim 35, wherein the plurality of freely-turning bearings is retained on the saw-bar.

38. The cutting saw of claim 35, wherein the cutting-chain includes a plurality of links including a first link and a second link, the first link having a leading edge and the second link having a trailing edge, and wherein the leading edge of the first link and the trailing edge of the second link have complementary mating surfaces, the complementary mating surfaces inducing articulation between the first link and the second link as the cutting-chain rotates about the perimeter of the saw-bar.

39. The cutting saw of claim 35, wherein the cutting-chain includes a plurality of successive links, each respective link of the plurality of successive links including a first stop that prevents articulation between the respective link and the immediately preceding link greater than a predetermined radius.

40. A cutting saw, comprising:

a motor that induces rotary motion in a shaft;

a plate that is mounted to the shaft so that the shaft can be held stationary relative to the plate on all axes except a longitudinal axis of the shaft, whereby the shaft can be freely rotated about the longitudinal axis of the shaft;

at least one cutting-tooth mounted about the shaft so that rotation of the shaft rotates the at least one cutting-tooth about the shaft;

a base that is slidably mounted to the plate to permit the plate to move relative to the base between a first position and a second position, the base having a forward edge with an opening through which the at least one cutting-tooth can protrude, the at least one cutting-tooth being enclosed by the base within the forward edge in the first position and extending beyond the forward outside the base through the opening in the second position; and

at least one gate slidably disposed in the opening in the forward edge of the base, the gate being movable between a third position and a fourth position, the third position minimizing a size of the opening in the forward edge of the base and the fourth position maximizing the size of the opening in the forward edge of the base.

41. The cutting saw of claim 40, further comprising at least one linkage arm pivotally connected to the at least one gate and the plate that moves that at least one gate from the third position to the fourth position when the plate moves from the first position to the second position.

42. The cutting saw of claim 40, wherein the at least one gate has an outer surface that is coplanar with the forward edge of the base throughout its movement between the third position and the fourth position.

43. The cutting saw of claim 40, wherein the at least one gate slides between the third position and the fourth position just outside a path of the cutting-chain to minimize tear-out.