US3939903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal assembly for a rotary regenerative heat exchanger
Assignee: Nissan Motor Co Ltd
•
Filing: 1973-11-02
•
Granted: 1976-02-24
•
Expires: 1993-11-02
Abstract
Abstract A seal assembly comprising a seal element mounted on an interior wall of a casing having a porous carbon sealing face, and urging means to urge the seal element into sealing engagement with an adjacent end of a rotary heat accumulator rotatable within the casing.
Inventors
- 👤 Yoshihiro Sakaki
- 👤 Kensuke Eishima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:10
CPC Classifications
F; F28; F28D; F28D19/00; F28D19/04; F28D19/047; Y; Y10; Y10S; Y10S165/00; Y10S165/009; Y10S165/013; Y10S165/016; Y10S165/02; Y10S165/021
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
118 words
In a rotary regenerative heat exchanger having disc-type rotary heat accumulator mounted for rotation within a casing having an interior wall adjacent to and spaced from one end of the disc-type rotary heat accumulator, a seal assembly comprising: a L-shaped retainer mounted securely to the interior wall of said casing; an elastomeric resilient member fixed to said L-shaped retainer; and a seal element having a carbon sealing face adjacent to the one end of said disc-type rotary heat accumulator and a base with a T-shape embedded in said elastomeric resilient member, said elastomeric resilient member being so constructed and arranged as to maintain said sealing face in sealing engagement with the end of said disc-type rotary heat accumulator.
Claim 2
Dependent Claim
118 words
In a rotary regenerative heat exchanger having disc-type rotary heat accumulator mounted for rotation within a casing having an interior wall adjacent to and spaced from one end of the disc-type rotary heat accumulator, a seal assembly comprising: a L-shaped retainer mounted securely to the interior wall of said casing; an elastomeric resilient member fixed to said L-shaped retainer; and a seal element having a carbon sealing face adjacent to the one end of said disc-type rotary heat accumulator and a base with a T-shape embedded in said elastomeric resilient member, said elastomeric resilient member being so constructed and arranged as to maintain said sealing face in sealing engagement with the end of said disc-type rotary heat accumulator.
Claim 3
Dependent Claim
20 words
A seal assembly as claimed in claim 1, in which said elastomeric resilient member is made of a silicon rubber.
References Cited (Backward Citations)
US2766055A
Cited
US3122375A
Cited
US3252505A
Cited
US3301317A
Cited
US3252506A
Cited
US3601182A
Cited
US3601414A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-02-23 | 1979-08-25 | 1980-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-23 | 1983-08-25 | 1984-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-23 | 1987-08-25 | 1988-02-24 | $7700.00 | Window Closed / Lapsed |