US3581777A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chimney construction
Assignee: Individual
•
Filing: 1969-10-03
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Granted: 1971-06-01
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Expires: 1989-10-03
Abstract
Abstract A chimney construction in which single unit blocks stacked about a flue lining are maintained in noncontact relation to minimize heat transfer and eliminate cracking of the structure and including a compressible barrier between the flue lining and the zones within the stacked blocks where reinforced cement grouting is to be poured.
Inventors
- 👤 Douglas Luther Hodges
- 👤 Elwood L Eberhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:07
CPC Classifications
E; E04; E04F; E04F17/00; E04F17/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
192 words
For a chimney of the type having single unit blocks adapted to be stacked one upon another about a flue-lining element and to be united by reinforced grouting cement in grouting zones during construction, means for isolating the single unit blocks from the effects of expansion and contraction of such flue-lining element comprising in combination: a. internal walls formed on and spaced relative to opposite sidewalls of such single unit block and in spaced relation relative to such flue-lining element; b. each of said internal walls having a shoulder formed at its ends integrally of the respective sidewalls of such single unit block and in spaced relation to the end walls thereof; c. each flue-lining element including outwardly projecting means adjacent each intersection of the end and sidewalls seated on said shoulders and positioning the flue-lining element relative to the surrounding single unit blocks; and d. a compressible diaphragm disposed adjacent each end of such single unit block with the edges of said diaphragm engaging the shoulders and extending around the ends of the flue-lining element to isolate the latter from the grouting zones at the ends of said single unit blocks.
Claim 2
Dependent Claim
192 words
For a chimney of the type having single unit blocks adapted to be stacked one upon another about a flue-lining element and to be united by reinforced grouting cement in grouting zones during construction, means for isolating the single unit blocks from the effects of expansion and contraction of such flue-lining element comprising in combination: a. internal walls formed on and spaced relative to opposite sidewalls of such single unit block and in spaced relation relative to such flue-lining element; b. each of said internal walls having a shoulder formed at its ends integrally of the respective sidewalls of such single unit block and in spaced relation to the end walls thereof; c. each flue-lining element including outwardly projecting means adjacent each intersection of the end and sidewalls seated on said shoulders and positioning the flue-lining element relative to the surrounding single unit blocks; and d. a compressible diaphragm disposed adjacent each end of such single unit block with the edges of said diaphragm engaging the shoulders and extending around the ends of the flue-lining element to isolate the latter from the grouting zones at the ends of said single unit blocks.
Claim 3
Dependent Claim
90 words
The means for isolating the single unit blocks from the flue lining as in claim 1 in which such flue lining has curved end walls and said projecting means comprising earlike flanges disposed in spaced relation to said shoulders formed at the ends of the internal walls, and in which said compressible diaphragms are bowed to conform to the curved end walls of such flue lining and the edges of said compressible diaphragm have keyed engagement between said earlike flanges and the adjacent shoulder formed on the single unit blocks.
Claim 4
Dependent Claim
47 words
The means for isolating the single unit blocks from the flue lining as in claim 1 in which each of said internal walls terminate in diagonal webs diverging toward and at right angles relative to the adjacent shoulder formed on the sidewalls of said single unit blocks.
Claim 5
Dependent Claim
34 words
The means for isolating the single unit blocks from the flue lining as in claim 3 in which said flue lining has curved end walls and the compressible diaphragms are bowed in conformance therewith.
Claim 6
Dependent Claim
57 words
The means for isolating the single unit blocks from the flue lining as in claim 4 in which said outwardly projecting means comprise earlike flanges at the sides of its curved end walls disposed to extend toward the right angle shoulder and diagonal web for pressing the edges of said compressible diaphragm firmly against the respective shoulders.
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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |