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US3785282A
Expired / Lapsed
US
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Mechanical press with toggle lever crank drive
Assignee: ZDAS AS
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Filing: 1971-06-08
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Granted: 1974-01-15
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Expires: 1991-06-08
Abstract
Abstract Drive mechanism for the slide of a mechanical press, especially a toggle lever crank press. In the slide driving mechanism means are provided comprising two eccentrics adjustable relative to one another for continuously changing the slide speed during its stroke, especially its slowing down close before the tool comes into contact with the stock to be worked.
Inventors
- 👤 I Kamelander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:13
CPC Classifications
B; B30; B30B; B30B1/00; B30B1/26; B30B1/268; B30B1/10; B30B1/14; B30B1/263; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
108 words
A mechanical press having a reciprocable slide, a rotatable main shaft, means for driving the main shaft, a main drive means for reciprocating the slide toward and away from the main shaft, said main drive means comprising an eccentric mounted on the main shaft to be driven thereby, a toggle having links connected by a pivotal toggle joint drivingly connected between the eccentric and the slide auxiliary drive means imparting motion to the pivotal toggle joint between the toggle links in a direction substantially perpendicular to the motion of the slide, and means for adjusting said main drive means by varying the motion of the upper toggle link.
Claim 2
Dependent Claim
108 words
A mechanical press having a reciprocable slide, a rotatable main shaft, means for driving the main shaft, a main drive means for reciprocating the slide toward and away from the main shaft, said main drive means comprising an eccentric mounted on the main shaft to be driven thereby, a toggle having links connected by a pivotal toggle joint drivingly connected between the eccentric and the slide auxiliary drive means imparting motion to the pivotal toggle joint between the toggle links in a direction substantially perpendicular to the motion of the slide, and means for adjusting said main drive means by varying the motion of the upper toggle link.
Claim 3
Dependent Claim
23 words
A press as claimed in claim 1, wherein said means for controlling the pivotal toggle joint comprises a linkage system including adjustable elements.
Claim 4
Dependent Claim
42 words
A press as claimed in claim 2, wherein said linkage system comprises a two-arm lever having a first arm adjustable in length, a cam driven by the main shaft, and a cam follower cooperating with the cam for driving said first arm.
Claim 5
Dependent Claim
23 words
A press as claimed in claim 3, wherein said first arm of the two-arm lever comprises a slide block and an adjusting screw.
Claim 6
Dependent Claim
32 words
A press as claimed in claim 3, wherein said linkage system comprises a link with length adjustment pivotally connected between the second arm of the two-arm lever and the pivotal toggle joint.
Claim 7
Dependent Claim
58 words
A press as claimed in claim 2, wherein saId linkage system comprises a two-arm lever having a first arm adjustable in length by a slide block and an adjusting screw, and a link with length adjustment by a threaded rod, said link being pivotally connected between the second arm of the two-arm lever and the pivotal toggle joint.
Claim 8
Dependent Claim
37 words
A press as claimed in claim 6, wherein said linkage system is driven by a cam driven from the main shaft and a pitman extending between said last-recited cam and the first arm of the two-arm lever.
Claim 9
Dependent Claim
36 words
A press as claimed in claim 1, wherein the main drive means includes a combined eccentric comprising a second eccentric upon which said first-recited eccentric is mounted and with respect to which it is angularly adjustable.
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) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |