US3147017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum gripper
Assignee: Dunham Tool Co Inc
•
Filing: 1962-09-05
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Granted: 1964-09-01
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Expires: 1982-09-05
Abstract
No abstract record available.
Inventors
- 👤 Russell H Dunham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:45
CPC Classifications
B; B25; B25B; B25B11/00; B25B11/005; B23; B23B; B23B31/00; B23B31/02; B23B31/24; B23B31/30; B23B31/307; Y; Y10; Y10T; Y10T279/00; Y10T279/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A WORK HOLDING APPARATUS FOR HOLDING IN A FIXED RELATION TO A REFERENCE SURFACE AN OBJECT HAVING AN ANNULAR, INTERNAL SURFACE COMPRISING, (A) A GRIPPER BODY ASSOCIATED WITH SAID REFERENCE SURFACE AND HAVING A GENERALLY ANNULAR EXTERNAL SURFACE ADAPTED TO MATE WITH THE INTERNAL SURFACE OF A WORKPIECE TO BE HELD, (B) SAID GRIPPER BODY DEFINING AT LEAST ONE CIRCUMFERENTIAL GROOVE AT THE EXTERNAL SURFACE THEREOF, (C) VACUUM ACTUATED PISTON MEANS, (D) PASSAGE MEANS CONNECTING SAID GROOVE AND SAID PISTON MEANS TO A SOURCE OF VACUUM, (E) MECHANICAL MEANS MOVABLE RELATIVE TO SAID GRIPPER BODY AND ACTUABLE BY SAID PISTON MEANS TO EXERT HOLDING FORCES ON A WORKPIECE PLACED OVER SAID GRIPPER BODY,
Claim 2
Dependent Claim
113 words
A WORK HOLDING APPARATUS FOR HOLDING IN A FIXED RELATION TO A REFERENCE SURFACE AN OBJECT HAVING AN ANNULAR, INTERNAL SURFACE COMPRISING, (A) A GRIPPER BODY ASSOCIATED WITH SAID REFERENCE SURFACE AND HAVING A GENERALLY ANNULAR EXTERNAL SURFACE ADAPTED TO MATE WITH THE INTERNAL SURFACE OF A WORKPIECE TO BE HELD, (B) SAID GRIPPER BODY DEFINING AT LEAST ONE CIRCUMFERENTIAL GROOVE AT THE EXTERNAL SURFACE THEREOF, (C) VACUUM ACTUATED PISTON MEANS, (D) PASSAGE MEANS CONNECTING SAID GROOVE AND SAID PISTON MEANS TO A SOURCE OF VACUUM, (E) MECHANICAL MEANS MOVABLE RELATIVE TO SAID GRIPPER BODY AND ACTUABLE BY SAID PISTON MEANS TO EXERT HOLDING FORCES ON A WORKPIECE PLACED OVER SAID GRIPPER BODY,
References Cited (Backward Citations)
US1618378A
Cited
US2895739A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |