# US 5,346,371 A · Hydraulic elevator oil tank

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- Number: US 5,346,371 A
- Document ID: US5346371A
- Status: Granted
- Kind: A
- Application number: 08/058,826
- Filed: 1993-05-04
- Granted: 1994-09-13
- Earliest claimed: 1991-09-20
- Assignees: Otis Elevator Company
- Inventors: Louis Bialy; Rajendra V. Mistry
- Web page: https://patentgrep.com/patent/US5346371A

## CPC

- F15B 1/26: Supply reservoir or sump assemblies
- F15B: SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR

## Abstract

An elevator hydraulic tank is provided with shaped sides which increase the rigidity and heat dissipating ability of the tank. The shaped sides of the tank may be corrugated. A hydraulic machine is mounted on the underside of the tank lid so that maintenance of the machine does not require draining of the tank. The shaped sides are enclosed by an outer shell which further minimizes noise emanating from the tank.

## Claims

### Claim 1

An elevator tank for holding hydraulic fluid comprising:
a first end panel,
a second end panel,
an axis extending between said first and second end panels, and
a single third panel forming a trough for holding said hydraulic fluid, said third panel having a first end portion attaching to said first end panel, and a second end portion attaching to said second end panel, said third panel having corrugations in planes normal to said axis such that the heat and noise dissipating ability and strength of the tank is enhanced.

### Claim 2 (depends on 1)

The tank of claim 1 wherein said corrugations in planes form a plane U-shape.

### Claim 3 (depends on 1)

The tank of claim 1 further comprising:
a lid for covering said panel, and
means for impelling hydraulic fluid from said tank, said means supported under and attaching to said lid such that said means resides within said hydraulic fluid.

### Claim 4 (depends on 3)

The tank of claim 3 wherein said means for impelling further comprises means for minimizing vibration passing to said lid.

### Claim 5 (depends on 1)

The tank of claim 1 further comprising:
a jacket disposed around said third panel for muffling sound emanating from said panel, said jacket and said panel not touching.

### Claim 6 (depends on 5)

The tank of claim 5 further comprising:
means communicating with said space between said jacket and said panel, said means circulating a cooling media therein.

### Claim 7 (depends on 6)

The tank of claim 6 wherein said means comprises:
a manifold attached to said jacket, and
a fan disposed with said manifold.