Patent US3972219A successfully refreshed from Google Patents.
US3972219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making the inlet end of a tubular burner construction
Assignee: Robertshaw Controls Co
•
Filing: 1975-01-15
•
Granted: 1976-08-03
•
Expires: 1995-01-15
Abstract
Abstract Cooperating die structure is disclosed for making the inlet end of a tubular burner construction. The inlet end is shaped by using a pair of dies which form a pair of spaced gripping parts respectively interconnected together at opposed ends thereof by substantially C-shaped resilient parts.
Inventors
- 👤 Fred Riehl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:23
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/46
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
103 words
An apparatus for making the inlet end of a tubular burner construction comprising a pair of cooperating die members each having a die surface means for engaging the cylindrical end of said tubular burner construction and forming said cylindrical end into a pair of spaced gripping means respectively interconnected together at opposed ends thereof by substantially C-shaped resilient parts, said surface means forming said gripping means and said C-shaped parts to have arcuate portions disposed in two planes that are spaced from each other and are generally parallel to each other when said die members are moved toward each other a certain amount.
Claim 2
Independent Claim
103 words
An apparatus for making the inlet end of a tubular burner construction comprising a pair of cooperating die members each having a die surface means for engaging the cylindrical end of said tubular burner construction and forming said cylindrical end into a pair of spaced gripping means respectively interconnected together at opposed ends thereof by substantially C-shaped resilient parts, said surface means forming said gripping means and said C-shaped parts to have arcuate portions disposed in two planes that are spaced from each other and are generally parallel to each other when said die members are moved toward each other a certain amount.
Claim 3
Dependent Claim
50 words
An apparatus as set forth in claim 1 wherein said die members have parts thereof that engage each other when said die members are brought together said certain amount to form said inlet end of said burner construction, said parts of said die members being outboard of said die surfaces.
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) | 1979-08-03 | 1980-02-02 | 1980-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-03 | 1984-02-02 | 1984-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-03 | 1988-02-02 | 1988-08-03 | $7700.00 | Window Closed / Lapsed |