Patent US3395189A successfully refreshed from Google Patents.
Patent US2930049A successfully refreshed from Google Patents.
Patent US4314772A successfully refreshed from Google Patents.
US4314772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ground heating system
Assignee: Individual
•
Filing: 1979-12-13
•
Granted: 1982-02-09
•
Expires: 1999-12-13
Abstract
Abstract A ground heating system comprises a porous stabilization layer provided between a pipe system for supplying heat and a pipe system for supplying water to control the ground humidity. The stabilization layer functions as a water distributor and heat storage means.
Inventors
- 👤 Jakobus W. Lestraden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:02
CPC Classifications
E; E01; E01C; E01C11/00; E01C11/24; E01C11/26
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
64 words
A ground heating system particularly for tracks such as runways, take-off and landing strips, parking lots and the like comprising a supply system for heat and a supply system for water to control the ground humidity wherein a porous stabilization layer is provided between the systems for the heat supply and the water supply to function as a water distributor and heat storage medium.
Claim 2
Dependent Claim
64 words
A ground heating system particularly for tracks such as runways, take-off and landing strips, parking lots and the like comprising a supply system for heat and a supply system for water to control the ground humidity wherein a porous stabilization layer is provided between the systems for the heat supply and the water supply to function as a water distributor and heat storage medium.
Claim 3
Dependent Claim
34 words
A ground heating system according to claim 1 wherein the surface of said stabilization layer is provided with grooves for distributing water and said grooves extend transversely to the longitudinal axis of the track.
Claim 4
Dependent Claim
28 words
A ground heating system according to claim 1 wherein the water supply system is embedded in a water permeable sand or pebble layer disposed above the stabilization layer.
Claim 5
Dependent Claim
20 words
A ground heating system according to claim 3 wherein the watering system is supplied selectively with hot or cold water.
Claim 6
Dependent Claim
32 words
A ground heating system according to claim 1, wherein said system for heat supply is disposed below said stabilization layer and said system for water supply is disposed above said stabilization layer.
Claim 7
Dependent Claim
16 words
A ground heating system according to claim 1, wherein said stabilization layer is made from sand-cement.
References Cited (Backward Citations)
US795772A
Cited
US1050914A
Cited
US1349136A
Cited
US1771269A
Cited
US2138217A
Cited
US3377462A
Cited
US3236991A
Cited
US3491439A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-02-08 | 1985-08-10 | 1986-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-08 | 1989-08-10 | 1990-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-08 | 1993-08-10 | 1994-02-09 | $7700.00 | Window Closed / Lapsed |