US3575302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Work handling mechanism
Assignee: Sfm Corp
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Filing: 1968-09-25
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Granted: 1971-04-20
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Expires: 1988-09-25
Abstract
Abstract A crank arm movable in opposite directions about a first axis carries an elevator arm movable with the crank arm about the first axis and movable relative thereto in opposite directions about a second axis. A pair of finger units carried by the elevator arm for movement therewith about the first and second axes and for movement relative thereto in opposite directions about a third axis close and open to engage and release a workpiece. The elevator arm and finger units also are movable as a unit in opposite directions along the second and third axes, respectively, for shifting a workpiece into and out of a chuck.
Inventors
- 👤 Constantine F Cafolla
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:45
CPC Classifications
B; B23; B23Q; B23Q7/00; B23Q7/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
125 words
A work handling mechanism comprising a crank arm mounted for movement in opposite directions about a first axis, an elevator arm, means mounting said elevator arm on said crank arm for movement therewith about said first axis and for movement relative thereto in opposite directions about a second axis, a pair of finger units carried by said elevator arm for movement therewith about said first and second axes and for movement relative thereto in opposite directions about a third axis, motor means for moving said arms and units about said axes and for opening and closing said units to release and grasp a workpiece, and said mounting means including means mounting said elevator arm for movement in opposite directions along said second and third axes.
Claim 2
Dependent Claim
125 words
A work handling mechanism comprising a crank arm mounted for movement in opposite directions about a first axis, an elevator arm, means mounting said elevator arm on said crank arm for movement therewith about said first axis and for movement relative thereto in opposite directions about a second axis, a pair of finger units carried by said elevator arm for movement therewith about said first and second axes and for movement relative thereto in opposite directions about a third axis, motor means for moving said arms and units about said axes and for opening and closing said units to release and grasp a workpiece, and said mounting means including means mounting said elevator arm for movement in opposite directions along said second and third axes.
Claim 3
Dependent Claim
45 words
A work handling mechanism as set forth in claim 1, in combination with a machine adapted to work on the workpieces handled by said mechanism, and hinge means mounting said mechanism on said machine for swinging movement into and out of loading position relative thereto.
Claim 4
Dependent Claim
23 words
A work handling mechanism as set forth in claim 1, wherein two pairs of said finger units are carried by said elevator arm.
Claim 5
Dependent Claim
33 words
A work handling mechanism as set forth in claim 1, wherein said motor means comprise hydraulic cylinders, together with control means therefor including limit switches actuated by extension and retraction of said cylinders.
Claim 6
Dependent Claim
36 words
A work handling mechanism as set forth in claim 1, wherein said mounting means includes a guide bar journaled in said crank arm, and rollers carried by said elevator arm in guided engagement with said bar.
Claim 7
Dependent Claim
61 words
A work handling mechanism as set forth in claim 1, wherein each of said units includes a somewhat Y-shaped arm carrying a pair of workpiece engaging elements spaced apart 120*, and a lever pivoted to said arm and carrying a third workpiece engaging element movable into and out of workpiece engaging position in 120* spaced relation to said pair of elements.
Claim 8
Dependent Claim
48 words
A work handling mechanism as set forth in claim 1, together with control means actuated upon movement of at least certain of said motor means, said control means including pair limit switches and actuating dogs therefor connected to an associated one of said motor means for movement therewith.
References Cited (Backward Citations)
BE641423A
Cited
US3097011A
Cited
US3087596A
Cited
US3209922A
Cited
US3268092A
Cited
US3280991A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |