# US 11,306,644 B2 · Radiator fan

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 11,306,644 B2
- Document ID: US11306644B2
- Status: Granted
- Kind: B2
- Application number: 16/755,611
- Filed: 2018-10-12
- Published: 2020-10-22
- Granted: 2022-04-19
- Earliest claimed: 2017-10-13
- Assignees: Isuzu Motors Limited
- Applicants: Isuzu Motors Limited
- Inventors: Ryusuke Fujino
- Web page: https://patentgrep.com/patent/US11306644B2

## CPC

- F01P 5/02: Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
- F01P 7/06: by varying blade pitch
- B60K 11/04: Arrangement or mounting of radiators, radiator shutters, or radiator blinds
- F01P 3/20: Cooling circuits not specific to a single part of engine or machine (F01P3/22 takes precedence)
- F04D 19/002: {Axial flow fans}
- F04D 27/002: {by varying geometry within the pumps, e.g. by adjusting vanes}
- F04D 29/366: {Adjustment by interaction of inertion and lift}
- B60K 2025/022: {by a mechanical transmission}
- B60Y 2200/141: Light trucks
- F01P: COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES (arrangements in connection with cooling of propulsion units in vehicles B60K11/00; heat-transfer, heat-exchange or heat-storage materials C09K5/00; {cooling of gas-turbine engines F02C7/12}; heat exchange in general, radiators F28)
- B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02)
- B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY

## Abstract

This radiator fan for cooling a radiator has: a rotating member that rotates due to rotation of an engine; blade members that are provided on the peripheral surface of the rotating member such that the angle of surfaces that receive air is changed; a moving member, which is provided in the rotating member, and which moves toward the peripheral surface of the rotating member due to centrifugal force generated by means of the rotation of the rotating member; and a connecting member, which is connected to the moving member and the blade members, transmits the movement of the moving member to the blade members, and changes the angle of the surfaces.

## Claims

### Claim 1

A radiator fan for cooling a radiator, comprising:
a rotation member that rotates due to rotation of an engine;
a plurality of blade members disposed around a peripheral surface of the rotation member in such a way that angles of surfaces of the plurality of blade members that receive air are variable;
a plurality of shafts that fixes the plurality of blade members to the peripheral surface of the rotation member so as to be rotatable;
a movement member, disposed in the rotation member, that moves toward the peripheral surface of the rotation member due to a centrifugal force generated by rotation of the rotation member; and
a coupling member that is directly coupled to the plurality of blade members, independent of the plurality of shafts, and coupled to the movement member, the coupling member directly transmitting a movement of the movement member to the plurality of blade members independent of the plurality of shafts, and changes the angles of the surfaces of the plurality of blade members,
wherein the coupling member comprises:
a first coupling member that has a ring shape and is directly coupled to the plurality of blade members by extending through the plurality of blade members; and
a second coupling member that has a bar-like shape, is coupled to the movement member and the first coupling member, and transmits the movement of the movement member to the first coupling member to rotate the first coupling member relative to the rotation member.

### Claim 2 (depends on 1)

The radiator fan according to claim 1, wherein
angles of normal lines of the surfaces of the plurality of blade members with respect to a rotation axis direction of the rotation member increase in accordance with a rotation speed of the engine.

### Claim 3 (depends on 1)

The radiator fan according to claim 1, wherein:
the movement member includes a first weight and a second weight that are disposed so as to face a rotation axis of the rotation member, and
the radiator fan further comprises an elastic member that pulls the first weight and the second weight toward the rotation axis.