# US 9,039,055 B1 · Clevis type hook with safety latch

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

- Number: US 9,039,055 B1
- Document ID: US9039055B1
- Status: Granted
- Kind: B1
- Application number: 14/542,176
- Filed: 2014-11-14
- Published: 2015-05-28
- Granted: 2015-05-26
- Earliest claimed: 2013-11-25
- Applicants: Terry K. Robins
- Inventors: Terry K. Robins
- Web page: https://patentgrep.com/patent/US9039055B1

## CPC

- F16B 45/022: {the closing member pivoting about an axis lying in the plane of the hook}
- F16B 45/027: {and having position-locking means for the closing member}
- 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 clevis type slip hook or grab hook includes a safety latch which is held in position by a biased pin that may be axially extended to move the latch between a latching and unlatching position to close or open the slot in the slip hook. The latch is comprised of a closure member in the form of a plate having an elongate edge that fits in the hook slot between the tip end and shank end of the hook.

## Claims

### Claim 1

In a clevis hook, including a hook body with a tip end, a shank end including a clevis having a first upper arm and a second, spaced lower arm, said arms each a through passage, said passage having a common through passage axis, said tip end and the upper arm of said shank end spaced to define an elongate, receiving slot with an open side, the improvement comprising:
a twist lock latch member mechanism for substantially closing the open side of the receiving slot, said latch member mechanism including an elongate shaft affixed to and projecting from said latch member, said shaft member having a top end and a bottom section, said bottom section axially slidably fitted through said clevis passages and rotatable about the axis;
said latch member further including:
a body closure member with an elongate closure surface sized for placement to substantially close the elongate receiving slot, said closure surface radially spaced from the slide axis and pivotally moveable about said axis between a position closing said receiving slot and a position opening said receiving slot, said body closure member configured along a lower edge to fit over a surface of said upper arm of said shank, said shank end and said lower edge comprising a detent and boss engagement couple; and
a biasing element intermediate the lower arm and a spring retention element on the shaft to bias the shaft and closure member axially to maintain the closure surface in said slot closing position.

### Claim 2 (depends on 1)

The clevis hook of claim 1 wherein the boss is positioned on the upper arm.

### Claim 3 (depends on 1)

The clevis hook of claim 1 wherein the boss is positioned on a lower edge of the body member.

### Claim 4 (depends on 1)

The clevis hook of claim 1 wherein said body member comprises substantially identical, spaced parallel side plates extending between and connecting the shaft and the closure surface.

### Claim 5 (depends on 4)

The clevis hook of claim 4 further including axially aligned plate openings in the parallel plates.

### Claim 6 (depends on 4)

The clevis hook of claim 4 wherein the boss is positioned on the upper arm and includes a boss through passage in alignment with the plate openings.

### Claim 7 (depends on 4)

The clevis hook of claim 4 wherein the side plates and closure surface comprise a U cross section shaped single plate.