US3907031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubular apparatus, in particular a steam generator
Assignee: Gutehoffnungshutte Sterkrade AG
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Filing: 1973-12-20
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Granted: 1975-09-23
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Expires: 1993-12-20
Abstract
Abstract A tubular apparatus, particularly a steam generator, having a casing, a plurality of tubes which are to be installed in the casing, and a series of gratings for separating the tubes a certain distance. The gratings consist of a frame, holders in the frames, and a plurality of grating bars maintained by the holders. One of the numerous advantages attained by the invention lies in that only a specified portion of the grating bars are installed initially so that a passage is formed that allow access by personnel to the fitting of the tubes.
Inventors
- 👤 Helmut Tegethoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:41
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/007; F28F9/013; F28F9/0135; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/40; Y10S165/401; Y10S165/405; Y10S165/407; Y10S165/409; Y10S165/41
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
126 words
A spacer for the tubes of a heat exchanger, in particular a steam generator, having a tube bundle comprising a plurality of grating structures, each grating structure comprising a series of grating bars, a ring-shaped frame surrounding the tube bundle and having a series of bores formed in at least one face thereof and extending into said frame, and a series of grooves, one groove of said series corresponding with one of the bores of said series of bores and formed within said frame to intersect with the corresponding bore, and a plurality of sleeves for holding said grating bars, each of said sleeves having a slot therein and rotatably mounted within one of said bores so that the slot is aligned with a respective groove.
Claim 2
Dependent Claim
126 words
A spacer for the tubes of a heat exchanger, in particular a steam generator, having a tube bundle comprising a plurality of grating structures, each grating structure comprising a series of grating bars, a ring-shaped frame surrounding the tube bundle and having a series of bores formed in at least one face thereof and extending into said frame, and a series of grooves, one groove of said series corresponding with one of the bores of said series of bores and formed within said frame to intersect with the corresponding bore, and a plurality of sleeves for holding said grating bars, each of said sleeves having a slot therein and rotatably mounted within one of said bores so that the slot is aligned with a respective groove.
Claim 3
Dependent Claim
35 words
A spacer according to claim 1, wherein said series of bores are formed in both faces of said frame, each bore extending into said frame a distance greater than the width of a corresponding groove.
Claim 4
Dependent Claim
51 words
A spacer according to claim 1, wherein said frame further comprises a central brace for dividing said frame into two sections, the faces of said central brace forming part of said faces of said frame, whereby the rods are mounted in said frame by engaging each end thereof with a sleeve.
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) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |