# US 4,398,334 A · Duct work clip installer and crimper

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- Number: US 4,398,334 A
- Document ID: US4398334A
- Status: Granted
- Kind: A
- Application number: 06/297,690
- Filed: 1981-08-31
- Granted: 1983-08-16
- Earliest claimed: 1981-08-31
- Inventors: Edward W. Kovalevich
- Web page: https://patentgrep.com/patent/US4398334A

## CPC

- B21D 39/02: of sheet metal by folding, e.g. connecting edges of a sheet to form a cylinder
- B25B 27/16: abutted flanges
- B25B 31/00: Hand tools for applying fasteners (nailing or stapling tools B25C)
- Y10T 29/49915: Overedge assembling of seated part
- Y10T 29/49925: Inward deformation of aperture or hollow body wall
- Y10T 29/53709: Overedge assembling means
- Y10T 29/53783: Clip applier
- Y10T 29/53996: by deforming
- B21D: WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL (working or processing of wire B21F)
- B25B: TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A hand tool for installing clips to abutting edges of ducts and for crimping the clips to secure the ducts together is comprised of a rectangularly shaped base plate including pairs of opposed rollers mounted thereon with their axes perpendicular to the plate. A gap between the rollers is approximately the same size as the width of the combined edges being secured together. A raised pusher member pushes a clip which is resting on the plate into place and the same is crimped by the rollers when the tool is drawn back. A handle is located on the reverse side of the plate for manually moving the tool.

## Claims

### Claim 1

A hand tool for installing clips to abutting edges of ducts and for crimping the clips to secure the ducts together comprising:
a rigid flat planar and elongated base plate having a front surface and a back surface;
handle means mounted on said back surface adjacent one end of said base plate;
a raised pusher means mounted on the front surface adjacent said one end of said base plate;
a pair of opposed rollers rotatably mounted on the front surface adjacent the other end of said base plate, said rollers being rotatable about axes perpendicular to said base plate and being spaced from each other on either side of a substantial centerline of said front surface so as to leave a gap between the other peripheries of said rollers which gap overlies said centerline and in alignment with said pusher means.

### Claim 2 (depends on 1)

The tool as claimed in claim 1 wherein said rollers are located a slight distance above said front surface.

### Claim 3 (depends on 2)

The tool as claimed in claim 2 wherein said distance is approximately one-fourth of an inch.

### Claim 4 (depends on 3)

The tool as claimed in claim 3 wherein said pusher means has a height of approximately one-fourth of an inch.

### Claim 5 (depends on 1)

The tool as claimed in claim 1 wherein said gap is approximately one-half of an inch.

### Claim 6 (depends on 1)

The tool as claimed in claim 1 wherein each of said rollers is substantially cylindrically shaped and includes a chamfer on the outer surface adjacent the lower end thereof.

### Claim 7 (depends on 1)

The tool as claimed in claim 1 further including a second pair of opposed rollers, said second pair being substantially the same as said first mentioned pair and being similarly mounted on said front surface.

### Claim 8 (depends on 1)

The tool as claimed in claim 1 wherein said handle means includes a coupling member mounted on said back surface and an elongated rod adapted to be releasably connected to said coupling member.

### Claim 9 (depends on 1)

The tool as claimed in claim 1 wherein said handle means includes a member extending from said back surface so as to be grasped by a person's hand and including an opening therethrough in substantial alignment with said centerline.