# US 9,437,354 B2 · Voltage surge protector having a pressure release mechanism

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- Number: US 9,437,354 B2
- Document ID: US9437354B2
- Status: Granted
- Kind: B2
- Application number: 14/392,023
- Filed: 2012-08-01
- Published: 2015-11-26
- Granted: 2016-09-06
- Earliest claimed: 2011-08-01
- Applicants: Marco Antonio Ponce Vélez; Claudio Torres Nava
- Inventors: Marco Antonio Ponce Vélez; Claudio Torres Nava
- Web page: https://patentgrep.com/patent/US9437354B2

## CPC

- H01C 7/126: {Means for protecting against excessive pressure or for disconnecting in case of failure}
- H01C 1/02: Housing; Enclosing; Embedding; Filling the housing or enclosure
- H01C: RESISTORS

## Abstract

A voltage surge protector consisting of a plurality of varistors connected in a column, an upper electrode connected to the upper edge of the column of varistors, a lower electrode connected to the lower edge of the column of varistors, an insulating housing that surrounds the column of varistors, a fiberglass cover that surrounds the insulating housing and a weatherproof protective cover provided with barriers mounted on the fiberglass cover. The protector has a mechanism to release pressure during a voltage surge, which consists of a hole in a transversal direction for each varistor of the column of varistors inside the insulating housing, the holes being helicoidally distributed along the length of the housing of insulating material and of a depth less than the thickness of the insulating housing.

## Claims

### Claim 1

A voltage surge protector comprising a plurality of varistors connected in a column, an upper electrode connected to the upper edge of the column of varistors, a lower electrode connected to the lower edge of the column of varistors, an insulating housing that surrounds the column of varistors, and a weatherproof protective cover provided with barriers mounted on the insulating housing; characterized in that the insulating housing has a hole in a transversal direction for each varistor of the column of varistors inside the insulating housing, the holes being helicoidally distributed along the length of the insulating housing and each hole has a depth less than the thickness of the wall of the insulating housing.

### Claim 2 (depends on 1)

The voltage surge protector according to claim 1, characterized in that in the axial direction of the insulating housing, each hole is separated from other adjacent hole at a distance about equal to the thickness of a varistor.

### Claim 3 (depends on 1)

The voltage surge protector according to claim 1, characterized in that in the direction from top to bottom of the insulating housing, each hole is separated radially from the other adjacent superior hole to an angle of 45° to 90°.

### Claim 4 (depends on 1)

The voltage surge protector according to claim 1, characterized in that each hole has a form selected from a group that consists of a rectangular parallelepiped, right prism, rectangular pyramid, truncated rectangular pyramid, right cylinder, right cone, truncated right cone, spherical segment of a base, and combinations thereof.

### Claim 5 (depends on 4)

The voltage surge protector according to claim 4, characterized in that each hole has a shape of a right cylinder having a diameter of 6 mm to 18 mm.

### Claim 6 (depends on 4)

The voltage surge protector according to claim 4, characterized in that each hole has a depth of 6 mm to 18 mm.

### Claim 7 (depends on 1)

The voltage surge protector according to claim 1, characterized in that said insulating housing prevents penetration of moisture into said column of varistors and consists of a polymerizable composition comprising:
from 40% to 52% by weight of silica sand with a particle size of not less than 70% by weight of particles which are retained on a mesh sieve number 60 and not more than 30% by weight of particles which are retained on mesh sieve number 40;
from 23% to 36% by weight of silica sand with a particle size of not less than 80% by weight of particles which are retained on a mesh sieve number 325 and not more than 11% by weight of particles which are retained on mesh sieve number 200;
from 3% to 8% by weight of alumina particles;
from 4% to 24% by weight of the polyester precursor of ortho or isophthalic unsaturated type whose viscosity is from 50 to 8,000 cps at room temperature;
from 0.1% to 0.7% by weight of a curing agent based on benzoyl peroxide;
from 0.05% to 0.5% by weight of an cross-linking agent based on organosilane;
from 0.001% to 0.2% by weight of a silicone oil lubricant;
from 0.5% to 1.5% by weight of a plasticizer stearate, and
from 0.01% to 0.1% by weight of a phenolic antioxidant.