Patent US4037434A successfully refreshed from Google Patents.
US4037434A
Expired / Lapsed
US
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Closed cam track for a circular knitting machine
Assignee: MONARCH MANUFACTURING CORP
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Filing: 1976-03-26
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Granted: 1977-07-26
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Expires: 1996-03-26
Abstract
Abstract A circular knitting machine is provided with cam section blocks defining a closed needle butt cam track with upper and lower arcuate portions.
Inventors
- 👤 Gerard Durville
- 👤 Charles Hamilton Wunner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:24
CPC Classifications
D; D04; D04B; D04B15/00; D04B15/32
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
164 words
Needle actuating camming for a circular knitting machine defining a closed cam track with opposite sides to engage the butts of needles and alternately move the needles repeatedly between cast-off and latch clear positions, the cam track including straight needle raising portions, straight needle lowering portions, and curved bridging track portions between the raising and lowering portions of the track, the bridging portions each having one side defined by a single circular arc which is tangent to a corresponding one side of each of a raising and a lowering portion of the closed cam track, and having an opposite side which is defined by two circular arcs both with a radius equal to the first mentioned circular arc and with one of such two circular arcs tangent to the raising portion of the closed cam track on the side opposite the said one side thereof, the other being tangent to the lowering portion of the track on the side opposite its said one side.
Claim 2
Dependent Claim
164 words
Needle actuating camming for a circular knitting machine defining a closed cam track with opposite sides to engage the butts of needles and alternately move the needles repeatedly between cast-off and latch clear positions, the cam track including straight needle raising portions, straight needle lowering portions, and curved bridging track portions between the raising and lowering portions of the track, the bridging portions each having one side defined by a single circular arc which is tangent to a corresponding one side of each of a raising and a lowering portion of the closed cam track, and having an opposite side which is defined by two circular arcs both with a radius equal to the first mentioned circular arc and with one of such two circular arcs tangent to the raising portion of the closed cam track on the side opposite the said one side thereof, the other being tangent to the lowering portion of the track on the side opposite its said one side.
Claim 3
Dependent Claim
17 words
The combination of claim 1 wherein grooves in adjacent cam section blocks define the closed cam track.
Claim 4
Dependent Claim
31 words
The combination of claim 2 wherein the terminal portion of a groove in each cam section block and initial portion of a groove in an adjacent cam section block are misaligned.
Claim 5
Dependent Claim
36 words
The combination of claim 3 wherein said terminal portion of a groove in one cam section block and initial portion of a groove in an adjacent cam section block are ascending portions of the cam track.
Claim 6
Dependent Claim
60 words
The combination of claim 2 wherein each cam section block includes an initial ascending portion of the cam track, a descending portion of the cam track, a terminal ascending portion of the cam track, an upper bridging portion between the initial ascending and descending portions of the track, and a lower bridging portion between the descending and terminal ascending portions.
Claim 7
Dependent Claim
34 words
The combination of claim 1 wherein the radii of the arcs of the upper bridging portions of the track differ from the radii of the arcs of the lower bridging portions of the track.
Claim 8
Dependent Claim
35 words
The combination of claim 4 wherein the radii of the arcs of the upper bridging portions of the tracks are greater than the radii of the arcs of the lower bridging portions of the track.
References Cited (Backward Citations)
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-25 | 1981-01-24 | 1981-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-25 | 1985-01-24 | 1985-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-25 | 1989-01-24 | 1989-07-26 | $7700.00 | Window Closed / Lapsed |