# US 7,612,309 B2 · Buffering mechanism for gas circuit breaker

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

- Number: US 7,612,309 B2
- Document ID: US7612309B2
- Status: Granted
- Kind: B2
- Application number: 11/984,854
- Filed: 2007-11-23
- Published: 2009-05-28
- Granted: 2009-11-03
- Earliest claimed: 2007-11-23
- Assignees: Chung-Hsin Electric & Machinery Mfg. Corp.
- Inventors: Chang-Ching Chung; Ming-Sheng Huang
- Web page: https://patentgrep.com/patent/US7612309B2

## CPC

- H01H 33/42: Driving mechanisms
- H01H 3/60: Mechanical arrangements for preventing or damping vibration or shock
- H01H 33/008: {Pedestal mounted switch gear combinations}
- H01H 33/14: Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc
- H01H: ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES (contact cables H01B7/10; electrolytic self-interrupters H01G9/18; emergency protective circuit arrangements H02H; switching by electronic means without contact-making H03K17/00)

## Abstract

A buffering mechanism for a gas circuit breaker includes a center piece which includes two protrusions extending from two ends thereof and two match surfaces are defined in two opposite sides of the center piece. Two side boards each have a pivot hole and a slot defined therethrough, the two protrusions of each end of the center piece are pivotably engaged with the pivot hole and the slot respectively. A plurality of impact plates are engaged with the two match surfaces of the center piece. When the impact plates are hit by the two links of the Y-shaped link mechanism of the gas circuit breaker at different times, the center piece is pivoted along the slots to absorb impact forces from the two links.

## Claims

### Claim 1

A gas circuit breaker comprising: a barrel; a Y-shaped link mechanism located in the barrel and cooperated with two links, the Y-shaped link mechanism including an upright member and two inclined members which are pivotably connected to a top of the upright member, the two links pivotably connected to the two inclined members respectively; a buffering mechanism located inside the gas circuit breaker and including
a center piece having two protrusions extending from each of two ends thereof and two match surfaces defined in two opposite sides thereof;
two side boards each having a pivot hole and a slot defined therethrough, the two protrusions of each end of the center piece pivotably engaged with the pivot hole and the slot respectively, each slot being sized such that the protrusion is movable therein, and
a plurality of impact plates engaged with the two match surfaces of the center piece wherein the Y-shaped link mechanism engages with the impact plates.

### Claim 2 (depends on 1)

The gas circuit breaker as claimed in claim 1, wherein the center piece includes two through holes defined through the two respective match surfaces and each impact plate includes two passages which are located in alignment with the through holes in the center piece, two bolts extending through the through holes and the passages and are connected with two nuts.

### Claim 3 (depends on 1)

The gas circuit breaker as claimed in claim 1, wherein each side board includes a plurality of holes for positioning the side boards.

### Claim 4 (depends on 1)

The gas circuit breaker as claimed in claim 1, wherein the slot of each side board is an oval slot.

### Claim 5 (depends on 1)

The gas circuit breaker as claimed in claim 1, wherein the slot of each side board is a curved slot and the curvature is 10 degrees.