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US4392775A Expired / Lapsed US ⏱️ 0.0 years remaining

Flat workpiece pickup

Assignee: United States Department of the Air Force
•
Filing: 1980-10-09
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Granted: 1983-07-12
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Expires: 2000-10-09
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Abstract

Abstract Apparatus for picking up a flat workpiece from a flat surface by an industrial robot where vacuum and magnetic devices are not practicable. A tined end-effector is plunged into a unique compliant surface formed of upstanding bristle-like elements with the workpiece being positioned thereon. The end-effector is moved under the workpiece which is then rigidly grasped and lifted off the surface without disturbing the original orientation and presented at the goal site.

Inventors

  • 👤 Gerald E. Ennis
  • 👤 Mario Colombo, Jr.

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 21:42
CPC Classifications
B; B25; B25J; B25J15/00; B65; B65G; B65G47/00; B65G47/74; B65G47/90

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 265 words
In combination, a compliant table surface for supporting a flat workpiece thereon, said compliant table surface comprising a rigid base member and a plurality of vertical upstanding closely spaced bristle-like elements affixed at the lower ends thereof to said rigid base member, the free upper ends of said bristle-like elements forming a level work surface; and an end-effector for firmly grasping said workpiece for transportation to a different location, said end-effector comprising a lower member having a plurality of tines extending forwardly from a block, each of said tines being rectangular in cross-section over their entire length up to their forward ends, the forward ends of each of said tines being curved upwardly from the bottom surface of said tines to the top surface of said tines, a handle portion extending rearwardly from said block, and a single upper member having a flat planar grasper corresponding in size to the said plurality of tines positioned substantially parallel to said upper surface of each of said plurality of tines with a handle portion extending rearwardly therefrom, the rearward end of the handle of said lower member being pivotally attached to the rearward end of the handle of said upper member to form said end-effector whereby the tines on the lower member of said end-effector can be inserted into the compliant table surface and moved under the workpiece, the grasper on the upper member of said end-effector being pivotable downward to firmly grasp the workpiece thereby allowing the workpiece to be picked up for transportation to a different location without disturbing the original orientation of the workpiece.
Claim 2
Dependent Claim 265 words
In combination, a compliant table surface for supporting a flat workpiece thereon, said compliant table surface comprising a rigid base member and a plurality of vertical upstanding closely spaced bristle-like elements affixed at the lower ends thereof to said rigid base member, the free upper ends of said bristle-like elements forming a level work surface; and an end-effector for firmly grasping said workpiece for transportation to a different location, said end-effector comprising a lower member having a plurality of tines extending forwardly from a block, each of said tines being rectangular in cross-section over their entire length up to their forward ends, the forward ends of each of said tines being curved upwardly from the bottom surface of said tines to the top surface of said tines, a handle portion extending rearwardly from said block, and a single upper member having a flat planar grasper corresponding in size to the said plurality of tines positioned substantially parallel to said upper surface of each of said plurality of tines with a handle portion extending rearwardly therefrom, the rearward end of the handle of said lower member being pivotally attached to the rearward end of the handle of said upper member to form said end-effector whereby the tines on the lower member of said end-effector can be inserted into the compliant table surface and moved under the workpiece, the grasper on the upper member of said end-effector being pivotable downward to firmly grasp the workpiece thereby allowing the workpiece to be picked up for transportation to a different location without disturbing the original orientation of the workpiece.
Claim 3
Dependent Claim 22 words
The combination defined in claim 1 wherein said bristle-like elements forming the level work surface supporting the workpiece are fabricated of nylon.
Claim 4
Dependent Claim 22 words
The combination defined in claim 1 wherein said bristle-like elements forming the level work surface supporting the workpiece are fabricated of polypropylene.
Claim 5
Dependent Claim 23 words
The combination defined in claim 1 wherein said bristle-like elements forming the level work surface supporting the workpiece are fabricated of stainless steel.
Claim 6
Dependent Claim 22 words
The combination defined in claim 1 wherein said bristle-like elements forming the level work surface supporting the workpiece are fabricated of rubber.

References Cited (Backward Citations)

US597194A Cited
US1945311A Cited
US2149910A Cited
US3152706A Cited
US3213779A Cited
US3581868A Cited
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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1986-07-11 1987-01-10 1987-07-12 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1990-07-11 1991-01-10 1991-07-12 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1994-07-11 1995-01-10 1995-07-12 $7700.00 Window Closed / Lapsed

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