US2797907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fastener for bubble caps
Assignee: Shell Development Co
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Filing: 1954-08-17
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Granted: 1957-07-02
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Expires: 1974-08-17
Abstract
No abstract record available.
Inventors
- 👤 Bie Piet De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:27
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; B01D3/16; B01D3/18; B01D3/20; B01D3/205
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
187 words
A HOLD-DOWN FOR FASTENING A BUBBLE CAP OVER AN OPENING IN A CONTACTING TRAY DECK, COMPRISING AN UPRIGHT FASTENING STEM ADAPTED FOR CONNECTION AT THE TOP THEREOF TO THE BUBBLE CAP AND A TRANSVERSE, RESILIENT SUPPORT SECURED TO THE BOTTOM OF THE STEM SO AS TO PERMIT DOWNWARD PASSAGE OF THE SUPPORT THROUGH SAID OPENING FROM ABOVE THE DECK AND UPWARD PASSAGE THERETHROUGH FROM BELOW IN THE UNDEFORMED STATE OF THE SUPPORTT AND HAVING A PLURALITY OF UPWARDLY DIRECTED ABUTMENTS DISPOSED TO ENGAGE THE UNDER SIDE OF THE DECK TO LIMIT UPWARD MOVEMENT OF THE SUPPORT, A PLURALITY OF LATERAL RETAINING SURFACES ON THE RESILIENT SUPPORT URGED RESILIENTLY OUTWARDS FOR FRICTIONAL ENGAGEMENT WITH THE INTERIOR SURFACE OF SAID OPENING, AND CAM SURFACES ABOVE SAID RETAINING SURFACES ON THE SSUPPORT MERGING THEREWITH TO MOVE SAID RETAINING SURFACES RESILIENTLY INWARDS BY ENGAGEMENT OF SAID CAM SURFACES WITH SAID INTERIOR SURFACE OF THE OPENING, ALL PARTS OF THE SUPPORT ABOVE SAID RETAINING SURFACES BEING SITUATED INWARDS WITH RESPECT TO THE RETAINING SURFACES, WHEREBY SAID SUPPORT IS RESTRAINED AGAINST DOWNWARD MOVEMENT DRUING ASSEMBLY AND DISASSEMBLY SOLELY BY SAID RESILIENT, FRICTIONAL ENGAGEMENT.
Claim 2
Dependent Claim
187 words
A HOLD-DOWN FOR FASTENING A BUBBLE CAP OVER AN OPENING IN A CONTACTING TRAY DECK, COMPRISING AN UPRIGHT FASTENING STEM ADAPTED FOR CONNECTION AT THE TOP THEREOF TO THE BUBBLE CAP AND A TRANSVERSE, RESILIENT SUPPORT SECURED TO THE BOTTOM OF THE STEM SO AS TO PERMIT DOWNWARD PASSAGE OF THE SUPPORT THROUGH SAID OPENING FROM ABOVE THE DECK AND UPWARD PASSAGE THERETHROUGH FROM BELOW IN THE UNDEFORMED STATE OF THE SUPPORTT AND HAVING A PLURALITY OF UPWARDLY DIRECTED ABUTMENTS DISPOSED TO ENGAGE THE UNDER SIDE OF THE DECK TO LIMIT UPWARD MOVEMENT OF THE SUPPORT, A PLURALITY OF LATERAL RETAINING SURFACES ON THE RESILIENT SUPPORT URGED RESILIENTLY OUTWARDS FOR FRICTIONAL ENGAGEMENT WITH THE INTERIOR SURFACE OF SAID OPENING, AND CAM SURFACES ABOVE SAID RETAINING SURFACES ON THE SSUPPORT MERGING THEREWITH TO MOVE SAID RETAINING SURFACES RESILIENTLY INWARDS BY ENGAGEMENT OF SAID CAM SURFACES WITH SAID INTERIOR SURFACE OF THE OPENING, ALL PARTS OF THE SUPPORT ABOVE SAID RETAINING SURFACES BEING SITUATED INWARDS WITH RESPECT TO THE RETAINING SURFACES, WHEREBY SAID SUPPORT IS RESTRAINED AGAINST DOWNWARD MOVEMENT DRUING ASSEMBLY AND DISASSEMBLY SOLELY BY SAID RESILIENT, FRICTIONAL ENGAGEMENT.
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) | 1960-07-01 | 1960-12-31 | 1961-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-01 | 1964-12-31 | 1965-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-01 | 1968-12-31 | 1969-07-02 | $7700.00 | Window Closed / Lapsed |