US4584745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double angled precision file
Assignee: Individual
•
Filing: 1984-02-06
•
Granted: 1986-04-29
•
Expires: 2004-02-06
Abstract
Abstract A precision file for sharpening saw teeth. The file includes a flattened oblong cross section for exact shaping of the saw teeth. Two sets of single cut teeth are cut into the file and extend over the file's longitudinal axis. A first set of teeth extends from a central lateral axis outward toward one end of the file, and a second set extends from the central axis outward towards the file's second end. The file is thus capable of an extensor cutting stroke using either end.
Inventors
- 👤 Arvie I. Seiber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:05
CPC Classifications
B; B23; B23D; B23D71/00; B23D71/04; Y; Y10; Y10T; Y10T407/00; Y10T407/18
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
222 words
A file for cutting metal of chainsaw chisel-cut teeth comprising: a flat metal blank having a first and a second terminal end and including an upper and a lower flat surface, said upper and lower flat surfaces including a multiplicity of single cut teeth cut thereinto and with each tooth extending the full width of the blank, said teeth being cut perpendicular to a longitudinal axis of said blank, and parallel to each other, and extending from a center portion of said blank facing toward said first terminal end and further extending from said center facing in an opposite direction toward said second terminal end in a tandem configuration, said blank further including a left and a right hemispherical side face whereby a flattened oblong cross-section is formed with said upper and lower flat surfaces, said hemispherical sides faces including a multiplicity of teeth cut thereinto, said side face teeth being cut at an angle from a vertical axis of approximately twenty degrees, and extending from said center portion of said blank toward said first end, and further extending from said center portion toward said second terminal end in a tandem configuration, said angle and direction of cut being uniform along the file's longitudinal axis; whereby a double-ended file is formed, having teeth adapted for an extensor cutting stroke on either end.
Claim 2
Dependent Claim
222 words
A file for cutting metal of chainsaw chisel-cut teeth comprising: a flat metal blank having a first and a second terminal end and including an upper and a lower flat surface, said upper and lower flat surfaces including a multiplicity of single cut teeth cut thereinto and with each tooth extending the full width of the blank, said teeth being cut perpendicular to a longitudinal axis of said blank, and parallel to each other, and extending from a center portion of said blank facing toward said first terminal end and further extending from said center facing in an opposite direction toward said second terminal end in a tandem configuration, said blank further including a left and a right hemispherical side face whereby a flattened oblong cross-section is formed with said upper and lower flat surfaces, said hemispherical sides faces including a multiplicity of teeth cut thereinto, said side face teeth being cut at an angle from a vertical axis of approximately twenty degrees, and extending from said center portion of said blank toward said first end, and further extending from said center portion toward said second terminal end in a tandem configuration, said angle and direction of cut being uniform along the file's longitudinal axis; whereby a double-ended file is formed, having teeth adapted for an extensor cutting stroke on either end.
Claim 3
Dependent Claim
17 words
The file according to claim 1 wherein said teeth are cut approximately fifty to 20 the inch.
Claim 4
Dependent Claim
239 words
In combination with a chainsaw chisel-cut file having a blunt contour and flat upper and lower surfaces and hemispherical side surfaces describing a flattened oblong cross-section, with a multiplicity of parallel single-cut teeth cut into each of said surfaces, the improvement comprising a first set of teeth, each tooth of the first set being cut into said upper and lower flat surfaces perpendicularly to a longitudinal aixs of said file and further cut into said hemispherical side surfaces at an angle of approximately twenty degrees from a vertical axis, said first set of teeth being arranged in a tandem configuration beginning from a center portion of said longitudinal axis facing and extending toward a first terminal end thereof; a second set of teeth, each tooth of the second set being cut into said upper and lower flat surfaces perpendicularly to said longitudinal axis and further cut into said hemispherical side surfaces at an angle of approximately twenty degrees from said vertical axis, said second set of teeth being arranged in a tandem configuration beginning from said center portion of said longitudinal axis facing and extending toward a second terminal end of said file, said said second set of teeth cut into said hemispherical side surfaces being opposite in direction from said first set of teeth being cut into said hemispherical side surfaces; whereby a double-ended file is formed, having teeth cut for an extensor cutting stroke on either end.
Claim 5
Dependent Claim
239 words
In combination with a chainsaw chisel-cut file having a blunt contour and flat upper and lower surfaces and hemispherical side surfaces describing a flattened oblong cross-section, with a multiplicity of parallel single-cut teeth cut into each of said surfaces, the improvement comprising a first set of teeth, each tooth of the first set being cut into said upper and lower flat surfaces perpendicularly to a longitudinal aixs of said file and further cut into said hemispherical side surfaces at an angle of approximately twenty degrees from a vertical axis, said first set of teeth being arranged in a tandem configuration beginning from a center portion of said longitudinal axis facing and extending toward a first terminal end thereof; a second set of teeth, each tooth of the second set being cut into said upper and lower flat surfaces perpendicularly to said longitudinal axis and further cut into said hemispherical side surfaces at an angle of approximately twenty degrees from said vertical axis, said second set of teeth being arranged in a tandem configuration beginning from said center portion of said longitudinal axis facing and extending toward a second terminal end of said file, said said second set of teeth cut into said hemispherical side surfaces being opposite in direction from said first set of teeth being cut into said hemispherical side surfaces; whereby a double-ended file is formed, having teeth cut for an extensor cutting stroke on either end.
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) | 1989-04-28 | 1989-10-28 | 1990-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-28 | 1993-10-28 | 1994-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-28 | 1997-10-28 | 1998-04-29 | $7700.00 | Window Closed / Lapsed |