US3107419A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flange spreader
Assignee: Individual
•
Filing: 1959-07-13
•
Granted: 1963-10-22
•
Expires: 1979-07-13
Abstract
No abstract record available.
Inventors
- 👤 Connard G Sandlfer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:41
CPC Classifications
F; F16; F16L; F16L23/00; F16L23/003; B; B25; B25B; B25B27/00; B25B27/14; B25B27/16; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53683; Y10T29/53796; Y10T29/5383
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A HYDRAULIC FLANGE SPREADER WHICH COMPRISES A PISTON HAVING TWO OPPOSITE ENDS, TWO OPPOSING CYLINDERS EACH HAVING ONE CLOSED END AND EACH BEING SLIDABLY POSITIONED ON SAID OPPOSITE ENDS OF SAID PISTON IN PRESSURE SEALED RELATION WITH SAID PISTON, A FLANGE GRIPPER ATTACHED TO EACH SAID CYLINDER AT ITS OPEN END, A PRESSURIZABLE CHAMBER FORMED BY SAID OPPOSING CYLINDERS AND SAID PISTON AND COMMUNICATING THROUGH SAID PISTON, A FLUID WITHIN SAID CHAMBER, SAID FLUID BEING IN CONTACT WITH SAID OPPOSING CYLINDERS AND SAID OPPOSITE ENDS OF SAID PISTON, AND CAP MEANS CARRIED BY SAID PISTON BETWEEN SAID TWO OPPOSING
Claim 2
Dependent Claim
99 words
A HYDRAULIC FLANGE SPREADER WHICH COMPRISES A PISTON HAVING TWO OPPOSITE ENDS, TWO OPPOSING CYLINDERS EACH HAVING ONE CLOSED END AND EACH BEING SLIDABLY POSITIONED ON SAID OPPOSITE ENDS OF SAID PISTON IN PRESSURE SEALED RELATION WITH SAID PISTON, A FLANGE GRIPPER ATTACHED TO EACH SAID CYLINDER AT ITS OPEN END, A PRESSURIZABLE CHAMBER FORMED BY SAID OPPOSING CYLINDERS AND SAID PISTON AND COMMUNICATING THROUGH SAID PISTON, A FLUID WITHIN SAID CHAMBER, SAID FLUID BEING IN CONTACT WITH SAID OPPOSING CYLINDERS AND SAID OPPOSITE ENDS OF SAID PISTON, AND CAP MEANS CARRIED BY SAID PISTON BETWEEN SAID TWO OPPOSING
References Cited (Backward Citations)
US436915A
Cited
US2161013A
Cited
US2393795A
Cited
US2407471A
Cited
US2439692A
Cited
US2587893A
Cited
US2674034A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-10-21 | 1967-04-22 | 1967-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-21 | 1971-04-22 | 1971-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-21 | 1975-04-22 | 1975-10-22 | $7700.00 | Window Closed / Lapsed |