# US 4,396,086 A · Motorcycle front symbol plate

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- Number: US 4,396,086 A
- Document ID: US4396086A
- Status: Granted
- Kind: A
- Application number: 06/253,666
- Filed: 1981-04-13
- Granted: 1983-08-02
- Earliest claimed: 1980-04-23
- Assignees: Yamaha Hatsudoki Kabushiki Kaisha
- Inventors: Toshiyuki Hattori
- Web page: https://patentgrep.com/patent/US4396086A

## CPC

- B62K 11/00: Motorcycles, engine-assisted cycles or motor scooters with one or two wheels (fairings or streamlining parts not forming part of the frame B62J; transmission of drive from engines to wheels B62M)
- F01P 11/12: Filtering, cooling, or silencing cooling-air
- F02B 61/02: for driving cycles
- B62K: CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDECARS, FORECARS, OR THE LIKE
- 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)
- F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G)

## Abstract

A motorcycle is equipped with a water cooled engine and a radiator for the engine. The radiator is mounted to the front fork of the vehicle. A number (symbol) displaying plate is mounted to the front fork ahead of the radiator. An opening is placed adjacent to the mounting plate, and air guides are placed so that the on coming air is guided to the radiator, preferably as a laminar flow.

## Claims

### Claim 1

A front number holder for use in combination with a motorcycle of the type which includes a frame, a front fork, a water-cooled engine, and, mounted to said front fork and facing forwardly therefrom, a radiator, said holder comprising;
a hollow body mounted to said front fork forwardly of said radiator, having a forwardly-facing opening and a peripheral continuous wall forming a compartment with an open rear end facing said radiator, whereby to confine and direct rearwardly flowing air from the opening to the radiator, and a number displaying seat portion facing forwardly on said body adjacent to said opening, said seat portion at least partially occluding said radiator.

### Claim 2 (depends on 8)

A front number holder according to claim 8 in which said body includes a pair of spaced apart generally upright side walls.

### Claim 3 (depends on 1)

A front number plate according to claim 1 in which an air guide plate is disposed behind said seat portion to direct said air.

### Claim 4 (depends on 1)

A front number plate according to claim 1 in which said opening is below said seat portion.

### Claim 5 (depends on 1)

A front number plate according to claim 1 in which said opening is above said portion.

### Claim 6 (depends on 1)

A front number plate according to claim 1 in which said seat portion slants whereby to be elongated relative to its length if it were made upright.