Patent US4816254A successfully refreshed from Google Patents.
Patent US3910422A successfully refreshed from Google Patents.
US3910422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Feeding arrangement for transporting material and workpieces
Assignee: GESELLSCHAFT fur PRESSEN-AUTOMATION MBH
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Filing: 1974-09-04
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Granted: 1975-10-07
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Expires: 1994-09-04
Abstract
Abstract A feeding arrangement for transporting material or work-pieces, with a pair of gripper bars moveable back and forth in the feed direction. The gripper bars extend along the transport path, and are moveable separately from one another, in the vertical direction and transversely to the feed direction. A cam drive has three cams on a common shaft, with each cam used for generating the gripper bar motions in one predetermined direction, particularly for transporting workpieces in presses with several fabricating stations following one another in the feed direction. A lifting frame having a cam follower operating in conjunction with a cam to generate vertical motions, is in contact with the gripper bars running in lengthwise guides and in cross rails on the lifting frame.
Inventors
- 👤 Gunter Zierpka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:34
CPC Classifications
B; B21; B21D; B21D43/00; B21D43/02; B21D43/04; B21D43/05; B21D43/055
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
131 words
A feeding arrangement for step-wise transporting of material or workpieces comprising, in combination, a pair of gripper bars moveable back and forth in the feeding direction; said gripper bars extending along the transport path; means for moving said gripper bars separate from one another in the vertical direction and transversely to the feeding direction; cam drive means having three cams on a common shaft, each of said cams generating the gripper bar motions in one predetermined direction of motion; a base frame; a lifting frame vertically movable in said base frame; cam follower means carried by said lifting frame and operating with one of said cams for generating vertical motion, said lifting frame having longitudinal guide means and transverse guide means for guiding said gripper bars in longitudinal and transverse directions.
Claim 2
Dependent Claim
131 words
A feeding arrangement for step-wise transporting of material or workpieces comprising, in combination, a pair of gripper bars moveable back and forth in the feeding direction; said gripper bars extending along the transport path; means for moving said gripper bars separate from one another in the vertical direction and transversely to the feeding direction; cam drive means having three cams on a common shaft, each of said cams generating the gripper bar motions in one predetermined direction of motion; a base frame; a lifting frame vertically movable in said base frame; cam follower means carried by said lifting frame and operating with one of said cams for generating vertical motion, said lifting frame having longitudinal guide means and transverse guide means for guiding said gripper bars in longitudinal and transverse directions.
Claim 3
Dependent Claim
38 words
The feeding arrangement as defined in claim 1 wherein said lifting frame is located directly above said cam for generating vertical motion, said lifting frame being symmetrical with respect to a vertical plane extending in the feed direction.
Claim 4
Dependent Claim
38 words
The feed arrangement as defined in claim 1 wherein said transverse guide means comprises guide rails on said lifting frame; slides moveable along said guide rails; and longitudinal guide means on said gripper bars carried by said slides.
Claim 5
Dependent Claim
40 words
The feeding arrangement as defined in claim 3 including follower means for transmitting the transverse motion from one of said cams to said gripper bars; and a vertical guide member for holding said follower means to one of said slides.
Claim 6
Dependent Claim
75 words
The feeding arrangement as defined in claim 4 including means for lifting and lowering said gripper bars, said follower means for transmitting transverse motions comprising transverse drive means located in a plane extending transversely to the feed direction and connected directly to said means for lifting and lowering said gripper bars, said follower means for transmitting transverse motions comprising a plurality of followers each in contact with one of said slides through a vertical groove.
Claim 7
Dependent Claim
60 words
The feeding arrangement as defined in claim 1 including housing means for holding said cam drive means with said cams and said common shaft; means for raising and lowering said gripper bars arranged at the end of said housing means; and a housing box attached to said housing means for holding said means for raising and lowering said gripper bars.
Claim 8
Dependent Claim
20 words
The arrangement as defined in claim 6 wherein said housing box is attached to said housing means by flange means.
Claim 9
Dependent Claim
34 words
The feeding arrangement as defined in claim 1 including a plurality of presses with fabricating stations following one another in the feed direction, said workpieces being transported between said presses and said fabricating stations.
Claim 10
Dependent Claim
25 words
The arrangement as defined in claim 1 wherein each of said cams generates the gripper bar motions in one of the three dimensions of space.
Claim 11
Dependent Claim
17 words
The feeding arrangement as defined in claim 1 wherein said transverse guide means comprises cross rail members.
References Cited (Backward Citations)
US3753489A
Cited
US3707908A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |