US4722188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory insulation of hot end in stirling type thermal machines
Assignee: Individual
•
Filing: 1986-10-17
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Granted: 1988-02-02
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Expires: 2006-10-17
Abstract
Abstract A high temperature resistant liner of refractory material is used to line the displacer chamber so as to permit engine operation at temperature beyond those possible with metallic chamber walls. A compression sleeve or ring of high tensile strength material circumferentially encompasses the liner and preloads the liner against the forces of the highly pressurized working fluid in the displacer chamber.
Inventors
- 👤 John L. Otters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:38
CPC Classifications
F; F02; F02G; F02G1/00; F02G1/06; F02G1/04; F02G1/043; F02G1/0435; F02G1/045; F02G1/05; F02G2258/00; F02G2258/10; F02G2270/00; F02G2270/80; F02G2270/85; F05; F05C; F05C2225/00; F05C2225/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
153 words
A thermal machine comprising: a machine body comprised of a plurality of axial body sections, said body having two opposite ends; means compressing said body between said opposite ends for holding said body sections in axially assembled relationship; a cylindrical displacer chamber in said body having a hot end and a cold end and containing a working fluid, a displacer reciprocable within said displacer chamber for displacing the fluid between the hot and cold ends thereby to subject the fluid to a thermodynamic cycle in cooperation with a compressor piston; refractory insulation means at least partly defining said displacer chamber and held in axial compression between upper body sections associated with a thermal end of the machine body and lower body sections associated with a work end of the machine body, and means radially compressing said refractory insulation for pre-loading said refractory insulation means against tensile force exerted thereon by said working fluid.
Claim 2
Dependent Claim
153 words
A thermal machine comprising: a machine body comprised of a plurality of axial body sections, said body having two opposite ends; means compressing said body between said opposite ends for holding said body sections in axially assembled relationship; a cylindrical displacer chamber in said body having a hot end and a cold end and containing a working fluid, a displacer reciprocable within said displacer chamber for displacing the fluid between the hot and cold ends thereby to subject the fluid to a thermodynamic cycle in cooperation with a compressor piston; refractory insulation means at least partly defining said displacer chamber and held in axial compression between upper body sections associated with a thermal end of the machine body and lower body sections associated with a work end of the machine body, and means radially compressing said refractory insulation for pre-loading said refractory insulation means against tensile force exerted thereon by said working fluid.
Claim 3
Dependent Claim
28 words
The machine of claim 1 wherein said refractory insulation means includes an inner cylinder and said radially compressive means includes an outer cylinder of high tensile strength material.
Claim 4
Dependent Claim
19 words
The machine of claim 2 wherein said inner cylinder is a ceramic cylinder and said outer cylinder is metallic.
References Cited (Backward Citations)
US3861146A
Cited
US4523554A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-02-01 | 1991-08-03 | 1992-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-01 | 1995-08-03 | 1996-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-01 | 1999-08-03 | 2000-02-02 | $7700.00 | Window Closed / Lapsed |