Patent US3307816A successfully refreshed from Google Patents.
US3307816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inclined-bore vacuum board valve
Assignee: Individual
•
Filing: 1965-03-31
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Granted: 1967-03-07
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Expires: 1985-03-31
Abstract
No abstract record available.
Inventors
- 👤 Cocito Joe Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:33
CPC Classifications
B; B66; B66C; B66C1/00; B66C1/02; B66C1/0237; B66C1/025; B65; B65G; B65G47/00; B65G47/74; B65G47/90; B65G47/91; B66C1/0212; F; F16; F16K; F16K51/00; F16K51/02; G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/58; G03B27/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
216 words
A VACUUM BOARD FOR HOLDING FLEXIBLE SHEETS IN A PLANE, COMPRISING: (A) A PANEL MEMBER HAVING PLURAL SUCTION HOLES THERETHROUGH, EACH INCLUDING A BORE EXTENDING FROM THE FRONT FACE OF SAID MEMBER THERETHROUGH TO THE REAR AND HAVING A SHOULDER THEREIN, AT LEAST ONE PORTION OF THE BORE LOCATED BETWEEN THE SHOULDER AND THE FRONT FACE HAVING ITS WALLS INCLINED DOWNWARDLY TOWARD THE LATTER WHEN THE PANEL MEMBER IS UPRIGHT; (B) VACUUM MANIFOLD MEANS ON THE REAR OF THE PANEL MEMBER AND COMMUNICATING WITH SAID BORES; (C) VACUUM-OPERATED VALVE MEANS IN EACH SUCTION HOLE AND COMPRISING A BALL WHICH IS A FREE ROLLING-FIT IN SAID ONE PORTION OF THE BORE; (D) EACH SHOULDER HAVING AN OPENING THERETHROUGH WHICH IS SMALLER THAN THE DIAMETER OF THE BALL AND WHICH COMMUNICATES WITH ANOTHER PORTION OF THE BORE WHICH EXTENDS THROUGH THE REAR OF THE PANEL MEMBER, THE CENTER OF THE OPENING THROUGH THE SHOULDER BEING MORE THAN ONE RADIUS OF THE BALL FROM THE NEAREST WALL SURFACE OF SAID ONE PORTION OF THE BORE NEAR THE SHOULDER, AND THE BALL BEING WEIGHTED BEYOND THE CAPABILITY OF THE VACUUM IN THE MANIFOLD MEANS TO LIFT IT INTO FULLY SEATED POSITION IN THE OPENING AT THE SHOULDER; AND (E) MEANS NEAR THE FRONT-FACE FOR RETAINING THE BALLS IN THE BORES.
Claim 2
Dependent Claim
216 words
A VACUUM BOARD FOR HOLDING FLEXIBLE SHEETS IN A PLANE, COMPRISING: (A) A PANEL MEMBER HAVING PLURAL SUCTION HOLES THERETHROUGH, EACH INCLUDING A BORE EXTENDING FROM THE FRONT FACE OF SAID MEMBER THERETHROUGH TO THE REAR AND HAVING A SHOULDER THEREIN, AT LEAST ONE PORTION OF THE BORE LOCATED BETWEEN THE SHOULDER AND THE FRONT FACE HAVING ITS WALLS INCLINED DOWNWARDLY TOWARD THE LATTER WHEN THE PANEL MEMBER IS UPRIGHT; (B) VACUUM MANIFOLD MEANS ON THE REAR OF THE PANEL MEMBER AND COMMUNICATING WITH SAID BORES; (C) VACUUM-OPERATED VALVE MEANS IN EACH SUCTION HOLE AND COMPRISING A BALL WHICH IS A FREE ROLLING-FIT IN SAID ONE PORTION OF THE BORE; (D) EACH SHOULDER HAVING AN OPENING THERETHROUGH WHICH IS SMALLER THAN THE DIAMETER OF THE BALL AND WHICH COMMUNICATES WITH ANOTHER PORTION OF THE BORE WHICH EXTENDS THROUGH THE REAR OF THE PANEL MEMBER, THE CENTER OF THE OPENING THROUGH THE SHOULDER BEING MORE THAN ONE RADIUS OF THE BALL FROM THE NEAREST WALL SURFACE OF SAID ONE PORTION OF THE BORE NEAR THE SHOULDER, AND THE BALL BEING WEIGHTED BEYOND THE CAPABILITY OF THE VACUUM IN THE MANIFOLD MEANS TO LIFT IT INTO FULLY SEATED POSITION IN THE OPENING AT THE SHOULDER; AND (E) MEANS NEAR THE FRONT-FACE FOR RETAINING THE BALLS IN THE BORES.
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) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |