US3906629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary shear
Assignee: Individual
•
Filing: 1974-11-11
•
Granted: 1975-09-23
•
Expires: 1994-11-11
Abstract
Abstract Rotary shear has power handle containing electric motor with shaft having worm gear at its end extending from motor parallel to axis of handle. Cutting head, rotatably mounting therein a driving shear wheel and a cooperating driven shear wheel, is connected to handle, and worm gear on shaft meshes with gear on driving shear wheel to rotate the said driving shear wheel. Material to be cut is fed into cutting head between shear wheels. Means are provided to more positively feed material into the cutting head, such as serrations or teeth on peripheral rear edge of driving shear wheel and/or resilient means mounted adjacent driven shear wheel to apply a pressure to the material being cut and pinch the said material against the driving shear wheel.
Inventors
- 👤 Jr Francis Joseph Fuchs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:55
CPC Classifications
B; B26; B26B; B26B25/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
188 words
A rotary shear for cutting material, said rotary shear comprising: a. a handle, b. motor means mounted within said handle, c. a shaft connected to said motor means and adapted to be rotated thereby, said shaft extending through an end of said handle, d. a worm Gear mounted to that end of said shaft extending outside of said handle, e. a cutting head mounted to said handle adjacent said shaft, f. a first shear wheel rotatably mounted within said cutting head and having a peripheral cutting edge, g. the longitudinal axis of said shaft extending parallel to said first shear wheel, h. a second shear wheel rotatably mounted within said cutting head and having a peripheral cutting edge, i. the peripheral cutting edges of said first and second shear wheels being adapted to cooperate to cut material fed into said cutting head between the said first and second shear wheels, j. gear means mounted to said first shear wheel and meshing with said worm gear on said shaft, k. whereby rotation of said shaft by said motor means will rotate said first shear wheel in said cutting head.
Claim 2
Dependent Claim
188 words
A rotary shear for cutting material, said rotary shear comprising: a. a handle, b. motor means mounted within said handle, c. a shaft connected to said motor means and adapted to be rotated thereby, said shaft extending through an end of said handle, d. a worm Gear mounted to that end of said shaft extending outside of said handle, e. a cutting head mounted to said handle adjacent said shaft, f. a first shear wheel rotatably mounted within said cutting head and having a peripheral cutting edge, g. the longitudinal axis of said shaft extending parallel to said first shear wheel, h. a second shear wheel rotatably mounted within said cutting head and having a peripheral cutting edge, i. the peripheral cutting edges of said first and second shear wheels being adapted to cooperate to cut material fed into said cutting head between the said first and second shear wheels, j. gear means mounted to said first shear wheel and meshing with said worm gear on said shaft, k. whereby rotation of said shaft by said motor means will rotate said first shear wheel in said cutting head.
Claim 3
Dependent Claim
20 words
A rotary shear as in claim 1, wherein: l. said second shear wheel is parallel to said first shear wheel.
Claim 4
Dependent Claim
21 words
A rotary shear as in claim 1, wherein: l. said second shear wheel is disposed perpendicularly to said first shear wheel.
Claim 5
Dependent Claim
26 words
A rotary shear as in claim 1, further comprising: l. teeth spaced around the periphery of said first shear wheel and adapted to engage said material.
Claim 6
Dependent Claim
34 words
A rotary shear as in claim 1, further comprising: l. resilient means mounted to said second shear wheel and adapted to bear against said material and pinch said material against said first shear wheel.
Claim 7
Dependent Claim
95 words
A rotary shear as in claim 5, wherein: m. said resilient means comprises: i. a hub coaxially mounted to said second shear wheel, ii. a feeding wheel positioned around said hub, the outer diameter of said feeding wheel being larger than the outer diameter of said second shear wheel, the inner diameter of said feeding wheel being spaced from the outer diameter of said hub, iii. spring means operatively positioned between the outer diameter of said hub and the inner diameter of said feeding wheel whereby to resiliently center said feeding wheel around said hub.
Claim 8
Dependent Claim
26 words
A rotary shear as in claim 6, further comprising: n. teeth spaced around the periphery of said first shear wheel and adapted to engage said material.
Claim 9
Dependent Claim
28 words
A rotary shear as in claim 1, wherein: l. the outer diameter of said second shear wheel is less than the outer diameter of said first shear wheel.
Claim 10
Dependent Claim
33 words
A rotary shear as in claim 8, wherein: m. said first and second shear wheels are adapted to define with said material an angle of approach Alpha lying in the approximate range 25*-40*.
Claim 11
Dependent Claim
57 words
A rotary shear as in claim 1, further comprising: l. a first set of ball bearings positioned in said cutting head and peripherally rotatably mounting said first shear wheel in said cutting head, m. a second set of ball bearings positioned in said cutting head and peripherally rotatably mounting said second shear wheel in said cutting head.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |