EP0032880A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A preheating device for preliminary heating the liquid of the cooling circuit of a motor-vehicle engine
Assignee: Tir Srl
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Filing: 1981-01-19
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Granted: —
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Expires: 2001-01-19
Abstract
Abstract A preheating device for preliminary heating the liquid of the cooling circuit of a motor-vehicle engine comprising a heater (10) formed by a massive metallic cylindrical body (14) having an axial through cavity (20) adapted to be connected to the cooling circuit of the engine and two axial bores (22) each containing an armored heating resistor (24), an electric pump (12), and an electric feeding circuit (50, 51, 52, 54) for connecting the device to an electrical source disposed outside the motor-vehicle. The electric circuit comprises a switch controlled by a programmable timer (54).
Inventors
- 👤 Arnaldo Baldessari
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 16:50
CPC Classifications
F; F02; F02N; F02N19/00; F02N19/02; F02N19/04; F02N19/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
222 words
A preheating device for preliminary heating the liquid of the cooling circuit of a motor-vehicle engine, comprising; - a heater (10) with heating resistors (24) controlled by a thermostat (48), the said heater (10) being constituted by a substantially cylindrical massive metallic body (14) having an axial through cavity (20) forming a heating chamber through which in use the liquid of the cooling circuit of the engine of a motor-vehicle circulates, and two axial bores (22) disposed on opposite sides with respect to the said heating chamber (20) and each containing an armored resistor (24); the said metallic body (14) being provided with an inlet tubular connector (26) and an outlet tubular connector (30) communicating with the said heating chamber (20) and are adapted to be connected, in use, to the cooling circuit of the engine of a motor-vehicle. - an electric pump (12) having a body (38) secured to one end (18) of the metallic body (14) and a rotor (40) inserted within a cavity (28) of the said metallic body (14) which communicates with the said heating chamber (20) and with the said outlet tubular connector (30). - an electric feeding circuit (50, 51, 52, 54) for connecting in use the heating resistors (24), the thermostat (48) and the electric pump (12) with an electric source disposed outside the motor-vehicle.
Claim 2
Dependent Claim
222 words
A preheating device for preliminary heating the liquid of the cooling circuit of a motor-vehicle engine, comprising; - a heater (10) with heating resistors (24) controlled by a thermostat (48), the said heater (10) being constituted by a substantially cylindrical massive metallic body (14) having an axial through cavity (20) forming a heating chamber through which in use the liquid of the cooling circuit of the engine of a motor-vehicle circulates, and two axial bores (22) disposed on opposite sides with respect to the said heating chamber (20) and each containing an armored resistor (24); the said metallic body (14) being provided with an inlet tubular connector (26) and an outlet tubular connector (30) communicating with the said heating chamber (20) and are adapted to be connected, in use, to the cooling circuit of the engine of a motor-vehicle. - an electric pump (12) having a body (38) secured to one end (18) of the metallic body (14) and a rotor (40) inserted within a cavity (28) of the said metallic body (14) which communicates with the said heating chamber (20) and with the said outlet tubular connector (30). - an electric feeding circuit (50, 51, 52, 54) for connecting in use the heating resistors (24), the thermostat (48) and the electric pump (12) with an electric source disposed outside the motor-vehicle.
Claim 3
Dependent Claim
22 words
A preheating device as defined in Claim 1, wherein the electric feeding circuit comprises a switch controlled by a programmable timer (54).
Claim 4
Dependent Claim
63 words
A preheating device as defined in Claim 1, further comprising a tubular envelope (32) surrounding at least the portion (16) of the metallic body (14) within which the said axial bores (22) containing the heating resistors (24) extend, the said tubular envelope (32) defining with the lateral surface of the metallic body (14) a periferical annular interspace (34) containing a thermally insulating material.
Claim 5
Dependent Claim
35 words
A preheating device as defined in Claim 1, wherein i the lateral surface of the metallic body (14) has a flat portion (58) provided with bores (60) for securing the device to a motor-vehicle strut.
References Cited (Backward Citations)
No citation records indexed.
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