# US 4,520,648 A · Lever operated riveter

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- Number: US 4,520,648 A
- Document ID: US4520648A
- Status: Granted
- Kind: A
- Application number: 06/576,022
- Filed: 1984-02-01
- Granted: 1985-06-04
- Earliest claimed: 1984-02-01
- Assignees: Gregory Tool Systems, Inc.
- Inventors: Jack T. Gregory
- Web page: https://patentgrep.com/patent/US4520648A

## CPC

- B21J 15/386: {Pliers for riveting}
- B21J 15/043: {by pulling a mandrel}
- Y10T 29/53757: having allochiral actuating handles
- Y10T 29/5377: Riveter
- Y10T 29/539: Plier type means
- B21J: FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES (rolling of metal B21B; making particular products by forging or pressing B21K; cladding or plating B23K; finishing surfaces by hammering B23P9/04; compacting surfaces by blasting with particulate material B24C1/10; general features of presses, presses for consolidating scrap B30B; furnaces in general F27)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A mechanical riveter comprising a slideway with rivet-gripping jaw assembly slidable in said slideway to be pulled by a rod. A pivot and guide pin at the other end of the slideway pivotally carries a pair of squeezable handles and a pair of links, each pivoted between a handle and the end of the rod, so that when the handles are squeezed, the links pull the rod down and away from the nosepiece, guided through a bore through the pivot guide pin.

## Claims

### Claim 1

A mechanical pulling tool comprising:
a slideway;
a nose piece carried on one end of said slideway to press against a surface;
a gripping member slidable along said slideway to pull a work-piece away from said surface;
a pair of squeezable handles pivoted about a common axis on the other end of said slideway;
a rod carrying said gripping member at one end thereof and extending rearward through said common axis and between said handles, with the other end thereof being located rearward of said other end of said slideway, said rod being encompassed by said slideway; and
a pair of links, each pivoted at one end to one of said handles near said common axis, and extending inward of said handles and rearward of said common axis to pivot at the other end thereof to said other end of the rod so that squeezing said handles extends said links to pull said rod and gripping member away from said nose piece.

### Claim 2 (depends on 1)

The pulling tool defined by claim 1 wherein said gripping member comprises:
a collar with a conical inner surface fixed to said one end of the rod;
at least two jaws having complementary conical outer surfaces axially movable in said collar; and
first spring means biasing said jaws toward said one end to increase wedging action thereof.

### Claim 3 (depends on 1)

The pulling tool defined by claim 1 including:
a pivot pin secured across said slideway on said common axis;
said handles being pivotable on said pivot pin; and
means forming a hole extending diametrically through said pivot pin;
said rod extending through said hole and being slidably guided thereby.