Patent US3914977A successfully refreshed from Google Patents.
US3914977A
Expired / Lapsed
US
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Presses and the like
Assignee: Milacron Inc
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Filing: 1974-10-31
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Granted: 1975-10-28
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Expires: 1994-10-31
Abstract
Abstract A drive mechanism for a press feed device which operates in synchronism with the cycling of the press but which avoids shock loads on the feed rolls at the start of each feed cycle. This is accomplished by modifying the simple harmonic drive motion derived from the rotary member of the press with a harmonic motion of a different frequency so as to produce a resultant motion having zero acceleration at the beginning and middle of each cycle.
Inventors
- 👤 Derek John Rimmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:13
CPC Classifications
F; F16; F16H; F16H27/00; F16H27/02; B; B21; B21D; B21D43/00; B21D43/02; B21D43/04; B21D43/08; B21D43/09; B65; B65H; B65H20/00; B65H20/02; B65H20/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
136 words
A stock feed device for a press having a cyclically movable member, feed elements for moving the stock through the press, and a means operated by said cyclically movable member for driving the feed elements, said driving means including a first driven element operating with a simple harmonic motion coordinated with the motion of said cyclically movable member, a second driven element carried by said first driven element and operating with a simple harmonic motion having a frequency equal to the product of an integer and the frequency of said first driven element, an output element actuated by said second driven element, and means connecting said output element with said feed elements to thereby drive the feed elements with a motion composed of two simple harmonic components corresponding to the motions of the respective driven elements.
Claim 2
Dependent Claim
136 words
A stock feed device for a press having a cyclically movable member, feed elements for moving the stock through the press, and a means operated by said cyclically movable member for driving the feed elements, said driving means including a first driven element operating with a simple harmonic motion coordinated with the motion of said cyclically movable member, a second driven element carried by said first driven element and operating with a simple harmonic motion having a frequency equal to the product of an integer and the frequency of said first driven element, an output element actuated by said second driven element, and means connecting said output element with said feed elements to thereby drive the feed elements with a motion composed of two simple harmonic components corresponding to the motions of the respective driven elements.
Claim 3
Dependent Claim
36 words
The stock feed device of claim 1, wherein the acceleration of the output element is composed of two simple harmonic components of equal amplitude and having frequencies which differ by a ratio of 1 to 3.
Claim 4
Dependent Claim
28 words
The stock feed device of claim 1, wherein the harmonic acceleration components of the output element are 180* out of phase at the beginning of each feed cycle.
Claim 5
Dependent Claim
153 words
A stock feed device for a press having a crankshaft, feed elements for moving the stock through the press and means operated by the crankshaft for driving the feed elements, said driving means including a hub on said crankshaft, a gear wheel journaled on said hub with its axis parallel to, but offset from, the axis of said crankshaft, a fixed ring gear disposed with its axis coinciding with the axis of said crankshaft, a transmission gear journaled on said hub and meshing with said ring gear and said gear wheel, an eccentric on said gear wheel, an output element journaled on said eccentric, and means connecting said output element with said feed elements whereby said feed elements are operated with a motion composed of two simple harmonic components corresponding to the motions of the gear wheel axis relative to the crankshaft axis and the eccentric axis relative to the gear wheel axis.
Claim 6
Dependent Claim
153 words
A stock feed device for a press having a crankshaft, feed elements for moving the stock through the press and means operated by the crankshaft for driving the feed elements, said driving means including a hub on said crankshaft, a gear wheel journaled on said hub with its axis parallel to, but offset from, the axis of said crankshaft, a fixed ring gear disposed with its axis coinciding with the axis of said crankshaft, a transmission gear journaled on said hub and meshing with said ring gear and said gear wheel, an eccentric on said gear wheel, an output element journaled on said eccentric, and means connecting said output element with said feed elements whereby said feed elements are operated with a motion composed of two simple harmonic components corresponding to the motions of the gear wheel axis relative to the crankshaft axis and the eccentric axis relative to the gear wheel axis.
Claim 7
Dependent Claim
42 words
The stock feed device of claim 4, wherein the frequencies of the two simple harmonic components differ by a ratio of 1 to 3 and the eccentricities of the gear wheel axis and eccentric differ by a ratio of 9 to 1.
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) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |