Patent US3200631A successfully refreshed from Google Patents.
US3200631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for effecting reverse bends in dual heat exchange tubing
Assignee: Peerless of America Inc
•
Filing: 1962-08-06
•
Granted: 1965-08-17
•
Expires: 1982-08-06
Abstract
No abstract record available.
Inventors
- 👤 Jr Richard W Kritzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:27
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/28; B21C37/283; B21D; B21D11/00; B21D11/06; B21D11/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
IN AN APPARATUS FOR SIMULTANEOUSLY PRODUCING SUCCESSIVE PARALLEL REENTRANT BENDS IN MULTIPLE HEAT EXCHANGE TUBING OF THE TYPE THAT PRESENTS ELONGATED, STRAIGHT, PARALLEL TUBE LENGTHS, IN COMBINATION, A PAIR OF MANDREL CARRIERS MOUNTED ONE ABOVE THE OTHER IN SPACED RELATIONSHIP FOR INDEPENDENT ROTATION ABOUT RESPECTIVE VERTICAL AXES, A MANDREL ECCENTRICALLY DISPOSED ON EACH CARRIER AND HAVING ITS AXIS DISPOSED VERTICALLY, THE TWO MANDRELS EXTENDING IN OPPOSITE DIRECTIONS AND SIDE-BY-SIDE RELATIONSHIP SO AS TO OVERLAP EACH OTHER AND BEING ADAPTED TO RECEIVE THEREBETWEEN FOR BEINDING PURPOSES THE PARALLEL TUBE LENGTHS, AND MEANS FOR SELECTIVELY ROTATING SAID CARRIERS, EACH TO THE EXCLUSION OF THE OTHER, SELECTIVELY IN OPPOSITE DIRECTIONS THROUGHOUT A PREDETERMINED DEGREE TO CAUSE THE MANDREL OF THE ROTATED CARRIER TO ORBIT AROUND THE MANDREL OF THE OTHER CARRIER AND EFFECT SIMULTANEOUS BENDS IN THE TUBE LENGTHS.
Claim 2
Dependent Claim
136 words
IN AN APPARATUS FOR SIMULTANEOUSLY PRODUCING SUCCESSIVE PARALLEL REENTRANT BENDS IN MULTIPLE HEAT EXCHANGE TUBING OF THE TYPE THAT PRESENTS ELONGATED, STRAIGHT, PARALLEL TUBE LENGTHS, IN COMBINATION, A PAIR OF MANDREL CARRIERS MOUNTED ONE ABOVE THE OTHER IN SPACED RELATIONSHIP FOR INDEPENDENT ROTATION ABOUT RESPECTIVE VERTICAL AXES, A MANDREL ECCENTRICALLY DISPOSED ON EACH CARRIER AND HAVING ITS AXIS DISPOSED VERTICALLY, THE TWO MANDRELS EXTENDING IN OPPOSITE DIRECTIONS AND SIDE-BY-SIDE RELATIONSHIP SO AS TO OVERLAP EACH OTHER AND BEING ADAPTED TO RECEIVE THEREBETWEEN FOR BEINDING PURPOSES THE PARALLEL TUBE LENGTHS, AND MEANS FOR SELECTIVELY ROTATING SAID CARRIERS, EACH TO THE EXCLUSION OF THE OTHER, SELECTIVELY IN OPPOSITE DIRECTIONS THROUGHOUT A PREDETERMINED DEGREE TO CAUSE THE MANDREL OF THE ROTATED CARRIER TO ORBIT AROUND THE MANDREL OF THE OTHER CARRIER AND EFFECT SIMULTANEOUS BENDS IN THE TUBE LENGTHS.
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) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |