US4386735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for heating an operator's cabin
Assignee: Kloeckner Humboldt Deutz AG
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Filing: 1981-01-16
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Granted: 1983-06-07
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Expires: 2001-01-16
Abstract
Abstract Apparatus for heating the cabin of a vehicle operated by an internal combustion engine. The apparatus includes a pump for circulating hot oil from the engine sump and a heat exchanger for heating cabin air with heat from the oil. A throttle valve is mounted downstream from the pump to heat the oil and provide a source of heat particularly during warm-up periods. Also the apparatus includes an adjustable flow apportioning valve for selectively and adjustably dividing the flow of oil downstream from the throttle valve into two separate streams. The heat from one of the separate streams is then recycled directly into the oil at the pump suction. This arrangement maximizes the efficient useage of the heat generated in the throttle for cabin heating purposes. Also disclosed is an improved throttle valve for use in connection with the heating apparatus.
Inventors
- 👤 Paul Tholen
- 👤 Achim Z. Nieden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:25
CPC Classifications
F; F24; F24D; F24D7/00; B; B60; B60H; B60H1/00; B60H1/02; B60H1/14; B60H1/22; F24V; F24V40/00; F24V40/10
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
263 words
Apparatus for heating the operator's cabin of a machine driven by an internal combustion engine having an oil sump, said apparatus comprising: a high-pressure lubricating oil pump having a suction and a discharge; first conduit means for hydraulically interconnecting said suction and said sump; a load element having an inlet connection and an outlet connection and operable to heat oil passing therethrough; second conduit means hydraulically interconnecting the discharge of the pump and the inlet connection of the load element; fluid to air heat exchanger means adapted for mounting in said cabin for heating air in the latter, said exchanger having inlet and outlet heating oil connections; conduit structure for hydraulically interconnecting the outlet connection of the load element and said sump, said conduit structure comprising a third conduit means hydraulically interconnecting the outlet connection of the load element and the inlet connection of the exchanger means and a fourth conduit means for hydraulically interconnecting the outlet connection of the exchanger means and said sump; and adjustable flow apportionment means positioned in said conduit structure for selectively apportioning the flow of heated oil downstream from said load element between a shunt stream and a sump return stream for introducing heat from said shunt stream into the oil at the pump suction to a predetermined temperature level above an initially low temperature level of the sump oil, said flow apportionment means being arranged such that said sump return stream is directed to the sump through the conduit structure, and such that heat is delivered to said heat exchanger means at said predetermined temperature level.
Claim 2
Dependent Claim
263 words
Apparatus for heating the operator's cabin of a machine driven by an internal combustion engine having an oil sump, said apparatus comprising: a high-pressure lubricating oil pump having a suction and a discharge; first conduit means for hydraulically interconnecting said suction and said sump; a load element having an inlet connection and an outlet connection and operable to heat oil passing therethrough; second conduit means hydraulically interconnecting the discharge of the pump and the inlet connection of the load element; fluid to air heat exchanger means adapted for mounting in said cabin for heating air in the latter, said exchanger having inlet and outlet heating oil connections; conduit structure for hydraulically interconnecting the outlet connection of the load element and said sump, said conduit structure comprising a third conduit means hydraulically interconnecting the outlet connection of the load element and the inlet connection of the exchanger means and a fourth conduit means for hydraulically interconnecting the outlet connection of the exchanger means and said sump; and adjustable flow apportionment means positioned in said conduit structure for selectively apportioning the flow of heated oil downstream from said load element between a shunt stream and a sump return stream for introducing heat from said shunt stream into the oil at the pump suction to a predetermined temperature level above an initially low temperature level of the sump oil, said flow apportionment means being arranged such that said sump return stream is directed to the sump through the conduit structure, and such that heat is delivered to said heat exchanger means at said predetermined temperature level.
Claim 3
Dependent Claim
25 words
Apparatus as set forth in claim 1 wherein is included conduit and coupling means for introducing said shunt stream directly into said first conduit means.
Claim 4
Dependent Claim
52 words
Apparatus as set forth in claim 1 wherein is included a fluid to fluid heat exchanger located for exchanging heat between the fluid in said first conduit means and said shunt stream, the arrangement being such that the shunt stream then flows from the fluid to fluid exchanger and into the sump.
Claim 5
Dependent Claim
42 words
Apparatus as set forth in claim 1 wherein is included temperature responsive control means coupled with said flow apportionment means for adjusting the latter as a function of the temperature of the oil at one or more preselected points in the system.
Claim 6
Dependent Claim
27 words
Apparatus as set forth in claim 1 wherein said flow apportionment means is located upstream from the fluid to air exchanger and in said third conduit means.
Claim 7
Dependent Claim
26 words
Apparatus set forth in claim 1 wherein said flow apportionment means is located downstream from the fluid to air exchanger and in said fourth conduit means.
Claim 8
Dependent Claim
27 words
Apparatus as set forth in claim 2 wherein said flow apportionment means is located upstream from the fluid to air exchanger and in said third conduit means.
Claim 9
Dependent Claim
27 words
Apparatus as set forth in claim 3 wherein said flow apportionment means is located downstream from the fluid to air exchanger and in said fourth conduit means.
Claim 10
Dependent Claim
41 words
Apparatus as set forth in claim 7 wherein is included temperature responsive control means coupled with said apportionment means for adjusting the latter as a function of the temperature of the oil at one or more preselected points in the system.
Claim 11
Dependent Claim
41 words
Apparatus as set forth in claim 8 wherein is included temperature responsive control means coupled with said apportionment means for adjusting the latter as a function of the temperature of the oil at one or more preselected points in the system.
Claim 12
Dependent Claim
26 words
Apparatus as set forth in claim 2 wherein said apportionment means is located downstream from the fluid to air exchanger and in said fourth conduit means.
Claim 13
Dependent Claim
41 words
Apparatus as set forth in claim 11 wherein is included temperature responsive control means coupled with said apportionment means for adjusting the latter as a function of the temperature of the oil at one or more preselected points in the system.
Claim 14
Dependent Claim
15 words
Apparatus as set forth in claim 9 wherein one said point is in the sump.
Claim 15
Dependent Claim
15 words
Apparatus as set forth in claim 11 wherein one said point is in the sump.
Claim 16
Dependent Claim
14 words
Apparatus as set forth in claim 12 wherein said point is in the sump.
Claim 17
Dependent Claim
14 words
Apparatus as set forth in claim 1 wherein said load element comprises throttle means.
Claim 18
Dependent Claim
14 words
Apparatus as set forth in claim 7 wherein said load element comprises throttle means.
Claim 19
Dependent Claim
14 words
Apparatus as set forth in claim 8 wherein said load element comprises throttle means.
Claim 20
Dependent Claim
14 words
Apparatus as set forth in claim 11 wherein said load element comprises throttle means.
Claim 21
Dependent Claim
16 words
Apparatus as set forth in claim 16 wherein said throttle means includes a variable throttle member.
Claim 22
Dependent Claim
81 words
Apparatus as set forth in claim 20 wherein said throttle member is elongated and is mounted for longitudinal movement, said member having a truncated conical head at the high pressure end thereof and being spring loaded at the other end, there being a compensating port extending through the member from one end to the other end, the latter end being disposed in a chamber presenting a servomechanism, said valve means further including an adjustment valve controlling the flow from the chamber.
References Cited (Backward Citations)
US4136824A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-06-06 | 1986-12-06 | 1987-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-06 | 1990-12-06 | 1991-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-06 | 1994-12-06 | 1995-06-07 | $7700.00 | Window Closed / Lapsed |