# US 2014/0154028 A1 · Scisssors type expansion bolt

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- Number: US 2014/0154028 A1
- Document ID: US20140154028A1
- Status: Published application
- Kind: A1
- Application number: 14/234,638
- Filed: 2012-08-01
- Published: 2014-06-05
- Earliest claimed: 2011-08-02
- Assignees: Chunguang Pei
- Inventors: Zhisheng Pei; Chunguang Pei; Xiuxiu Wang
- Web page: https://patentgrep.com/patent/US20140154028A1

## CPC

- F16B 13/0808: {by a toggle-mechanism}
- F16B 13/04: with parts gripping in the hole or behind the reverse side of the wall after inserting from the front ({F16B13/002 and F16B13/12 take precedence;} friction-grip releasable fastenings in general F16B2/00)
- F16B: DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING (couplings for transmitting rotation F16D)

## Abstract

A scissors type expansion bolt is provided with a threaded bolt; two bars each including a concave jaw put on the threaded bolt; a pivot driven through intermediate portions of the bars and one end of the threaded bolt to pivotably secure the bars and the threaded bolt together; a threaded fastener put on an other end of the threaded bolt; and a sleeve put on the threaded bolt and disposed between the bars and the nut. In response to rotating the threaded fastener toward the bars, the sleeve opens the bars.

## Claims

### Claim 1

An expansion bolt comprising:
a threaded bolt;
two bars each including a concave jaw put on the threaded bolt;
a pivot driven through intermediate portions of the bars and one end of the threaded bolt to pivotably secure the bars and the threaded bolt together;
a threaded fastener put on an other end of the threaded bolt; and
a sleeve put on the threaded bolt and disposed between the bars and the nut;
wherein in response to rotating the threaded fastener toward the bars, the sleeve opens the bars.

### Claim 2 (depends on 1)

The expansion bolt of claim 1, wherein the concave jaw has a half-circular section.

### Claim 3 (depends on 1)

The expansion bolt of claim 1, wherein the concave jaw further comprises an inclined surface on an edge.

### Claim 4 (depends on 3)

The expansion bolt of claim 3, wherein the sleeve comprises a truncated conic member at one end adjacent to the pivot.

### Claim 5 (depends on 4)

The expansion bolt of claim 4, wherein the truncated conic member engages the bars.

### Claim 6 (depends on 3)

The expansion bolt of claim 3, wherein an inclined angle of the inclined surface is equal to that of a lateral surface of the truncated conic member.

### Claim 7 (depends on 1)

The expansion bolt of claim 1, wherein the threaded fastener comprises a washer put on the threaded bolt and disposed at an other end of the sleeve, and a resilient ring put on the threaded bolt and engaged the washer.

### Claim 8 (depends on 1)

The expansion bolt of claim 1, further comprising a biasing member interconnecting ones ends of the bars.

### Claim 9 (depends on 1)

The expansion bolt of claim 1, wherein the threaded bolt comprises a convex end engaging the bars.

### Claim 10 (depends on 3)

The expansion bolt of claim 3, wherein the truncated conic member rides along the inclined surfaces to open the bars.

### Claim 11 (depends on 1)

The expansion bolt of claim 1, further comprising a cone formed with the bars.

### Claim 12 (depends on 11)

The expansion bolt of claim 11, wherein each of the bars comprises two through holes at both ends respectively.