# US 8,740,288 B2 · Cab

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- Number: US 8,740,288 B2
- Document ID: US8740288B2
- Status: Granted
- Kind: B2
- Application number: 13/634,095
- Filed: 2012-07-06
- Published: 2013-10-03
- Granted: 2014-06-03
- Earliest claimed: 2012-03-30
- Assignees: Komatsu Ltd.
- Applicants: Takeshi Kamimae; Takeshi Esaki; Keisuke Kubota
- Inventors: Takeshi Kamimae; Takeshi Esaki; Keisuke Kubota
- Web page: https://patentgrep.com/patent/US8740288B2

## CPC

- B60H 1/00378: {for tractor or load vehicle cabins}
- B62D 33/0604: {Cabs insulated against vibrations or noise, e.g. with elastic suspension (resilient connections between superstructure sub-units B62D27/04; damping noise in general G10K11/00; for vehicles in general B60R13/08)}
- B62D 33/0617: {for tractors or off-the-road vehicles (protective devices for drivers in case of overturning of tractors B60R21/131)}
- E02F 9/0858: {Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units (E02F9/16, E02F9/18 take precedence)}
- E02F 9/163: {Structures to protect drivers, e.g. cabins, doors for cabins; Falling object protection structure [FOPS]; Roll over protection structure [ROPS] (for handrails mounted on cabins E02F9/0833 takes precedence; for vehicles in general B60R21/11, B60R21/13, for fork-lift trucks B66F9/07545)}
- B60H: ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B62D: MOTOR VEHICLES; TRAILERS (steering, or guiding on a desired track, of agricultural machines or implements A01B69/00; wheels, castors, axles, increasing wheel adhesion B60B; vehicle tyres, tyre inflation or tyre changing B60C; connections between vehicles of a train or the like B60D; vehicles for use on rail and road, amphibious or convertible vehicles B60F; suspension arrangements B60G; heating, cooling, ventilating or other air treating devices B60H; windows, windscreens, non-fixed roofs, doors or similar devices, protective coverings for vehicles not in use B60J; propulsion plant arrangements, auxiliary drives, transmissions, controls, instrumentation or dashboards B60K; electric equipment or propulsion of electrically-propelled vehicles B60L; power supply for electrically-propelled vehicles B60M; passenger accommodation not otherwise provided for B60N; adaptations for load transportation or to carry special loads or objects B60P; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q; vehicles, vehicle fittings or vehicle parts not otherwise provided for B60R; servicing, cleaning, repairing, supporting, lifting, or manoeuvring, not otherwise provided for, B60S; brake arrangements, brake control systems or parts thereof B60T; air-cushion vehicles B60V; motor-cycles, accessories therefor B62J, B62K; testing of vehicles G01M)
- E02F: DREDGING; SOIL-SHIFTING (winning peat E21C49/00)

## Abstract

A cab includes a driver's seat for an operator to sit and an air conditioner in its internal space. A floor plate forming the floor includes a tapered portion on a front side with respect to an operator sitting on the driver's seat and a rectangular portion on a rear side with respect to the operator as seen in a plan view, and the tapered portion is in a tapered trapezoidal shape having two parallel sides and a dimension in a width direction decreasing frontward. A through hole is formed in the floor plate of a region of the tapered portion and connects the internal space of the cab and an external space of the cab to each other. Accordingly, the pressure in the cab can effectively be reduced.

## Claims

### Claim 1

A cab comprising:
a driver's seat for an operator to sit and an air conditioner in an internal space of the cab; and
a floor plate forming a floor, said floor plate including a tapered portion on a front side with respect to an operator sitting on said driver's seat and a rectangular portion on a rear side with respect to the operator as seen in a plan view, said tapered portion being in a tapered trapezoidal shape having two parallel sides and a dimension in a width direction decreasing frontward,
a through hole being formed in said floor plate of a region of said tapered portion and connecting said internal space of said cab and an exterior of said cab to each other so that air in the internal space of the cab where the driver's seat is disposed is released to the exterior of the cab, wherein
the cab is formed so that a dimension in a height direction decreases frontward as seen in a side view, and said through hole is formed in said floor plate of a region where the dimension in said height direction decreases,
the air conditioner is disposed in said internal space of said cab at a position opposite to said through hole,
a first support member and a second support member support said air conditioner so that a gap is generated between said air conditioner and said floor plate, a height of each of the first and second support members being less than a distance between the first and second support members, and
an area of an opening of said through hole that opens to said internal space of said cab is equal to or larger than an area of an entrance of said gap that is surrounded by said air conditioner, said first and second support members, and said floor plate.

### Claim 2 (depends on 1)

The cab according to claim 1, wherein said through hole includes a plurality of slits.

### Claim 3 (depends on 1)

The cab according to claim 1, further comprising a cover member disposed in said exterior of said cab and at a position opposite to said through hole.

### Claim 4 (depends on 2)

The cab according to claim 2, wherein said cover member includes a cover and an acoustic member provided between said cover and said through hole.