US4069972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat systems for vehicles
Assignee: HANOMAG HANNOVER GERMANY A CORP OF GERMANY GmbH
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Filing: 1976-08-16
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Granted: 1978-01-24
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Expires: 1996-08-16
Abstract
Abstract A vehicle having an operators enclosure and an hydraulic circuit is provided with a heat exchanger to warm the enclosure. The heat exchanger is supplied with fluid from the return side of the hydraulic circuit thus eliminating the conventional engine coolant pipes.
Inventors
- 👤 Winfried Hausmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:26
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/00357; B60H1/00378; B60H1/02; B60H1/14; B62; B62D; B62D53/00; B62D53/02; E; E02; E02F; E02F9/00; E02F9/08; E02F9/0841; E02F9/20; E02F9/22
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
77 words
A vehicle having an engine and a chassis formed in two parts which are connected by a joint for pivotal movement about a vertical axis, a hydraulic circuit supplied with oil from a pump driven by said engine, and an operators enclosure including a heat exchanger, said heat exchanger being supplied with fluid from said hydraulic circuit, said engine being located on one of said parts and said operators enclosure being located on another of said parts.
Claim 2
Dependent Claim
77 words
A vehicle having an engine and a chassis formed in two parts which are connected by a joint for pivotal movement about a vertical axis, a hydraulic circuit supplied with oil from a pump driven by said engine, and an operators enclosure including a heat exchanger, said heat exchanger being supplied with fluid from said hydraulic circuit, said engine being located on one of said parts and said operators enclosure being located on another of said parts.
Claim 3
Dependent Claim
27 words
The vehicle of claim 1 wherein said heat exchanger is supplied with fluid by pipes connected in parallel with a low pressure zone of said hydraulic circuit.
Claim 4
Dependent Claim
31 words
The vehicle of claim 2 wherein the connection between the heat exchanger pipes and the low pressure region includes a variable control device for varying the flow through the heat exchanger.
References Cited (Backward Citations)
US2306379A
Cited
US3187498A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-23 | 1981-07-25 | 1982-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-23 | 1985-07-25 | 1986-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-23 | 1989-07-25 | 1990-01-24 | $7700.00 | Window Closed / Lapsed |