Patent US3426774A successfully refreshed from Google Patents.
US3426774A
Expired / Lapsed
US
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Hydraulic rams
Assignee: Surrey Steel Components Ltd
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Filing: 1966-10-24
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Granted: 1969-02-11
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Expires: 1986-10-24
Abstract
No abstract record available.
Inventors
- 👤 Jack Samuel Conn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:08
CPC Classifications
E; E03; E03C; E03C1/00; E03C1/12; E03C1/30; E03C1/304; G; G01; G01M; G01M3/00; G01M3/02; G01M3/26; G01M3/28; G01M3/2807; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4245; Y10T137/4259
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
210 words
A HYDRAULIC APPARATUS FOR USE IN CLEARING A BLOCKED CONDUIT THROUGH THE RAM EFFECT OF LIQUID COMPRISING A CHAMBER WITH AN INLET AND AN OUTLET, A VALVE NORMALLY CLOSING THE OUTLET AND MANUALLY OPERABLE FOR OPENING, SUPPORT MEANS FOR A COMPRESSED GAS CARTIDGE AT THE INLET, THE CARTRIDGE HAVING A NECK ENTERING THE INLET, MEANS FOR SEALING THE NECK TO THE INLET, A FIXED PIERCER WITHIN THE INLET AGAINST WHICH A PORTION OF THE CARTRIDGE IS ADAPTED TO BE FORCED FOR PUNCTURING A PORTION OF THE CARTRIDGE AND FOR CONDUCTING THE GAS THROUGH THE INLET INTO THE CHAMBER, A NON-RETURN VALVE AT THE DISCHARGE END OF THE CARTRIDGE PREVENTING RETURN OF THE GAS THROUGH THE INLET IN THE EVENT OF THE USE OF TWO CARTRIDGES, AN OULET CONDUIT LEADING FROM THE OUTLET, A LIQUID INLET CONNECTION TO THE OUTLET CONDUIT OUTWARDLY OF SAID OUTLET WITH A NONRETURN VALVE THEREIN, THE VOLUME OF THE CHAMBER AND THE GAS CONTENTS OF THE CARTRIDGE BEING SUCH THAT A PRESSURE OF 60 TO 100 LBS./SQ. INCH IS DEVELOPED IN THE CHAMBER WHEN THE CARTRIDGE IS PIERCED, AND SPRING MEANS TO URGE SAID VALVE TO CLOSED POSITION OF A STRENGTH TO PREVENT THE ENTRY OF LIQUID FROM THE CONDUIT INTO THE CHAMBER THROUGH ITS OUTLET.
Claim 2
Dependent Claim
210 words
A HYDRAULIC APPARATUS FOR USE IN CLEARING A BLOCKED CONDUIT THROUGH THE RAM EFFECT OF LIQUID COMPRISING A CHAMBER WITH AN INLET AND AN OUTLET, A VALVE NORMALLY CLOSING THE OUTLET AND MANUALLY OPERABLE FOR OPENING, SUPPORT MEANS FOR A COMPRESSED GAS CARTIDGE AT THE INLET, THE CARTRIDGE HAVING A NECK ENTERING THE INLET, MEANS FOR SEALING THE NECK TO THE INLET, A FIXED PIERCER WITHIN THE INLET AGAINST WHICH A PORTION OF THE CARTRIDGE IS ADAPTED TO BE FORCED FOR PUNCTURING A PORTION OF THE CARTRIDGE AND FOR CONDUCTING THE GAS THROUGH THE INLET INTO THE CHAMBER, A NON-RETURN VALVE AT THE DISCHARGE END OF THE CARTRIDGE PREVENTING RETURN OF THE GAS THROUGH THE INLET IN THE EVENT OF THE USE OF TWO CARTRIDGES, AN OULET CONDUIT LEADING FROM THE OUTLET, A LIQUID INLET CONNECTION TO THE OUTLET CONDUIT OUTWARDLY OF SAID OUTLET WITH A NONRETURN VALVE THEREIN, THE VOLUME OF THE CHAMBER AND THE GAS CONTENTS OF THE CARTRIDGE BEING SUCH THAT A PRESSURE OF 60 TO 100 LBS./SQ. INCH IS DEVELOPED IN THE CHAMBER WHEN THE CARTRIDGE IS PIERCED, AND SPRING MEANS TO URGE SAID VALVE TO CLOSED POSITION OF A STRENGTH TO PREVENT THE ENTRY OF LIQUID FROM THE CONDUIT INTO THE CHAMBER THROUGH ITS OUTLET.
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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) | 1972-02-11 | 1972-08-12 | 1973-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-11 | 1976-08-12 | 1977-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-11 | 1980-08-12 | 1981-02-11 | $7700.00 | Window Closed / Lapsed |