# US 9,752,839 B2 · Magazine with tilt-resistant follower

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- Number: US 9,752,839 B2
- Document ID: US9752839B2
- Status: Granted
- Kind: B2
- Application number: 15/181,464
- Filed: 2016-06-14
- Published: 2016-10-13
- Granted: 2017-09-05
- Earliest claimed: 2014-09-15
- Assignees: Pro Mag Mfg., Inc.
- Applicants: Pro Mag Mfg., Inc.
- Inventors: Michael Wayne Ballard
- Web page: https://patentgrep.com/patent/US9752839B2

## CPC

- F41A 9/70: Arrangements thereon for discharging, e.g. cartridge followers or discharge throats
- F41A 9/65: Box magazines having a cartridge follower
- F41A: FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE

## Abstract

Magazines with tilt-resistant followers have a tubular body defining a passage, a follower movable within the passage, and the follower including a roller. The follower may have rollers on the front and the rear. The follower may have two rollers on at least one of the front and the rear. The follower may have a platform portion, a tine extending perpendicular to platform portion, a roller connected proximate to the platform, and a second roller connected proximate to a free end of the tine. The follower may have front and rear tines, each tine having a pair of rollers. The tubular body may define a major plane, and the roller may define a roller axis perpendicular to the major plane. The follower may define a transverse aperture receiving a pin, and the roller may be supported on the pin. The roller may include a set of ball bearings.

## Claims

### Claim 1

A magazine comprising:
a tubular body defining a passage;
the tubular body defining a major plane and having an elongated forward wall and an opposed elongated rear wall;
the forward wall and the rearward wall being adapted to receive a plurality of cartridges therebetween, with a forward end of each cartridge proximate the forward wall, and a rearward end of each cartridge proximate the rear wall;
a follower movable within the passage and having a forward portion proximate the forward wall and a rear portion proximate the rear wall;
the follower including a forward roller connected to the forward portion of the follower, and a rear roller connected to the rear portion of the follower;
each of the forward roller and the rear roller defining a respective roller axis perpendicular to the major plane;
the follower having a platform portion;
the follower having a tine extending perpendicularly to platform portion;
a roller connected proximate to the platform; and
a second roller connected proximate to a free end of the tine.

### Claim 2 (depends on 1)

The magazine of claim 1 further comprising the follower including two rollers on at least one of the front and the rear.

### Claim 3 (depends on 1)

The magazine of claim 1 further comprising the follower having front and rear tines, each tine having a pair of rollers, each tine having a lower free end, and the lower free ends being spaced apart with a gap therebetween.

### Claim 4 (depends on 1)

The magazine of claim 1 further comprising:
the follower defining a transverse aperture receiving a pin; and
the roller being supported on the pin.

### Claim 5 (depends on 1)

The magazine of claim 1 further comprising the tubular body having an internal ridge received by the circumferential groove.

### Claim 6

A magazine comprising:
a tubular body defining a passage;
the tubular body defining a major plane and having an elongated forward wall and an opposed elongated rear wall;
the forward wall and the rearward wall being adapted to receive a plurality of cartridges therebetween, with a forward end of each cartridge proximate the forward wall, and a rearward end of each cartridge proximate the rear wall;
a follower movable within the passage and having a forward portion proximate the forward wall and a rear portion proximate the rear wall;
the follower including a forward roller connected to the forward portion of the follower, and a rear roller connected to the rear portion of the follower;
each of the forward roller and the rear roller defining a respective roller axis perpendicular to the major plane; and
wherein the forward portion of the follower is spaced apart from the forward wall when the forward roller contacts the forward wall, and wherein the rear portion of the follower is spaced apart from the rear wall when the rear roller contacts the rear wall.

### Claim 7 (depends on 6)

The magazine of claim 6 further comprising the follower including two rollers on at least one of the front and the rear.

### Claim 8 (depends on 6)

The magazine of claim 6 further comprising:
the follower having a platform portion;
the follower having a tine extending perpendicularly to platform portion;
a roller connected proximate to the platform; and
a second roller connected proximate to a free end of the tine.

### Claim 9 (depends on 8)

The magazine of claim 8 further comprising the follower having front and rear tines, each tine having a pair of rollers, each tine having a lower free end, and the lower free ends being spaced apart with a gap therebetween.

### Claim 10 (depends on 6)

The magazine of claim 6 further comprising:
the follower defining a transverse aperture receiving a pin; and
the roller being supported on the pin.

### Claim 11 (depends on 6)

The magazine of claim 6 further comprising the roller including a set of ball bearings.

### Claim 12 (depends on 6)

The magazine of claim 6 further comprising the roller defining a circumferential groove.

### Claim 13 (depends on 12)

The magazine of claim 12 further comprising the tubular body having an internal ridge received by the circumferential groove.

### Claim 14 (depends on 6)

The magazine of claim 6 wherein the tubular body defines a channel, and wherein at least a portion of the roller is received in the channel.

### Claim 15

A magazine comprising:
a tubular body defining a passage;
the tubular body defining a major plane and having an elongated forward wall and an opposed elongated rear wall;
the forward wall and the rearward wall being adapted to receive a plurality of cartridges therebetween, with a forward end of each cartridge proximate the forward wall, and a rearward end of each cartridge proximate the rear wall;
a follower movable within the passage and having a forward portion proximate the forward wall and a rear portion proximate the rear wall;
the follower including a forward roller connected to the forward portion of the follower, and a rear roller connected to the rear portion of the follower;
each of the forward roller and the rear roller defining a respective roller axis perpendicular to the major plane; and
wherein the forward wall defines the forwardmost portion of the magazine, and the rear wall defines the rearmost portion of the magazine.

### Claim 16 (depends on 15)

The magazine of claim 15 further comprising:
the follower having a platform portion;
the follower having a tine extending perpendicularly to platform portion;
a roller connected proximate to the platform; and
a second roller connected proximate to a free end of the tine.

### Claim 17

A magazine comprising:
a tubular body defining a passage;
the tubular body defining a major plane and having an elongated forward wall and an opposed elongated rear wall;
the forward wall and the rearward wall being adapted to receive a plurality of cartridges therebetween, with a forward end of each cartridge proximate the forward wall, and a rearward end of each cartridge proximate the rear wall;
a follower movable within the passage and having a forward portion proximate the forward wall and a rear portion proximate the rear wall;
the follower including a forward roller connected to the forward portion of the follower, and a rear roller connected to the rear portion of the follower;
each of the forward roller and the rear roller defining a respective roller axis perpendicular to the major plane; and
the roller including a set of ball bearings.

### Claim 18

A magazine comprising:
a tubular body defining a passage;
the tubular body defining a major plane and having an elongated forward wall and an opposed elongated rear wall;
the forward wall and the rearward wall being adapted to receive a plurality of cartridges therebetween, with a forward end of each cartridge proximate the forward wall, and a rearward end of each cartridge proximate the rear wall;
a follower movable within the passage and having a forward portion proximate the forward wall and a rear portion proximate the rear wall;
the follower including a forward roller connected to the forward portion of the follower, and a rear roller connected to the rear portion of the follower;
each of the forward roller and the rear roller defining a respective roller axis perpendicular to the major plane; and
the roller defining a circumferential groove.

### Claim 19

A magazine comprising:
a tubular body defining a passage;
the tubular body defining a major plane and having an elongated forward wall and an opposed elongated rear wall;
the forward wall and the rearward wall being adapted to receive a plurality of cartridges therebetween, with a forward end of each cartridge proximate the forward wall, and a rearward end of each cartridge proximate the rear wall;
a follower movable within the passage and having a forward portion proximate the forward wall and a rear portion proximate the rear wall;
the follower including a forward roller connected to the forward portion of the follower, and a rear roller connected to the rear portion of the follower;
each of the forward roller and the rear roller defining a respective roller axis perpendicular to the major plane; and
wherein the tubular body defines a channel, and wherein at least a portion of the roller is received in the channel.