# US 9,038,305 B2 · Quick-detach accessory base mount for an accessory rail

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- Number: US 9,038,305 B2
- Document ID: US9038305B2
- Status: Granted
- Kind: B2
- Application number: 13/923,044
- Filed: 2013-06-20
- Published: 2014-12-25
- Granted: 2015-05-26
- Earliest claimed: 2013-06-20
- Assignees: Torrey Pines Logic, Inc.
- Applicants: Leo Volfson
- Inventors: Leo Volfson
- Web page: https://patentgrep.com/patent/US9038305B2

## CPC

- F41G 11/004: {Mountings with clamping means on the device embracing at least a part of the firearm, e.g. the receiver or a dustcover (F41G11/003 takes precedence)}
- F16M 13/02: for supporting on, or attaching to, an object, e.g. tree, gate, window-frame, cycle
- F41G 11/003: {Mountings with a dove tail element, e.g. "Picatinny rail systems"}
- Y10T 29/49826: Assembling or joining
- Y10T 29/49863: with prestressing of part
- F41G: WEAPON SIGHTS; AIMING (optical aspects thereof G02B)
- F16M: FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

In some aspects a quick-detach (QD) accessory base mount includes a body. The body includes an accessory engagement interface configured to engage an accessory and a rail engagement interface defining a channel adapted to receive an accessory rail. A rail clamp is carried by the body and is moveable to selectively clamp the body to the accessory rail. A mounting arm extends outwardly from the body and is carried to rotate relative to the body between a first position and a second position. A cam is configured to support the rail clamp to grip the accessory rail and to clamp the body to the accessory rail when the mounting arm is in the first position and to release the rail clamp from gripping the accessory rail when the mounting arm is in the second position.

## Claims

### Claim 1

A quick-detach accessory base mount, comprising:
a body comprising:
an accessory engagement interface configured to engage an accessory;
a rail engagement interface defining a channel adapted to receive an accessory rail;
a rail clamp carried by the body and moveable to selectively clamp the body to the accessory rail;
a mounting arm coupled with a pivot shaft, the mounting arm extending outwardly from the body and carried to rotate relative to the body between a first position and a second position;
a preload screw threaded onto the pivot shaft at the end of the pivot shaft opposite the mounting arm and the rail clamp;
a cam configured to support the rail clamp to grip the accessory rail and clamp the body to the accessory rail when the mounting arm is in the first position and release the rail clamp from gripping the accessory rail when the mounting arm is in the second position; and
an interlock configured to selectively restrict rotation of the mounting arm between the first position and the second position, the interlock comprising a depressible interlock button depressible to a position allowing rotation of the mounting arm between the first position and the second position and springily biased to extend outward from the body to a position blocking rotation of the mounting arm between the first position and the second position and an interlock set screw coupled to the depressible interlock button, the interlock set screw rotatable to adjust the outward extension of the depressible interlock button from the body.

### Claim 2 (depends on 1)

The accessory base mount of claim 1, where the cam comprises a first portion defined by the mounting arm and a second portion defined by the rail clamp.

### Claim 3 (depends on 2)

The accessory base mount of claim 2, where the second portion of the cam comprises a surface configured to prohibit rotation of the mounting arm beyond at least one rotational endpoint defined by the first position and the second position.

### Claim 4 (depends on 1)

The accessory base mount of claim 1, where the channel is defined by the body as a first wall and a second wall, the first wall comprising a first engagement surface adapted to grip a first side of the accessory rail and the second wall comprising a resting surface adapted to support a portion of a second side of the accessory rail.

### Claim 5 (depends on 4)

The accessory base mount of claim 4, where the rail clamp comprises a second engagement surface adapted to grip the second side of the accessory rail.

### Claim 6 (depends on 1)

The accessory base mount of claim 1, wherein the channel is narrower at an end.

### Claim 7 (depends on 1)

The accessory base mount of claim 1, where the rail clamp is springily biased in an ungripped position.

### Claim 8 (depends on 1)

The accessory base mount of claim 1, wherein the preload screw is rotatable to adjust the outward extension of the mounting arm from the body and a springily-biased position of the rail clamp.

### Claim 9 (depends on 8)

The accessory base mount of claim 8, comprising a preload grub screw, the preload grub screw rotatable between an engaged position to prevent rotation of the preload screw around the pivot shaft and an unengaged position allowing rotation of the preload screw around the pivot shaft.

### Claim 10 (depends on 1)

The accessory base mount of claim 1, comprising a slot engagement bar for engaging with a slot configured into the accessory rail to prevent lateral movement of the body along an axis transverse to the slot.

### Claim 11

A quick-detach accessory base mount having:
a cam that supports a rail clamp to grip an accessory rail when a mounting arm coupled with a pivot shaft is in a first position and to release the rail clamp when the mounting arm is in a second position;
a preload screw threaded onto the pivot shaft at the end of the pivot shaft opposite the mounting arm and the rail clamp; and
an interlock configured to selectively restrict rotation of the mounting arm between the first position and the second position, the interlock comprising a depressible interlock button depressible to a position allowing rotation of the mounting arm between the first position and the second position and springily biased to extend outward from a body carrying the interlock to a position blocking rotation of the mounting arm between the first position and the second position and an interlock set screw coupled to the depressible interlock button, the interlock set screw rotatable to adjust the outward extension of the depressible interlock button from the body.

### Claim 12 (depends on 11)

The accessory base mount of claim 11, having a rail engagement interface that receives the accessory rail into a channel narrower at one end.

### Claim 13 (depends on 11)

The accessory base mount of claim 11, wherein a cam configuration prohibits rotation of the mounting arm beyond rotational endpoints defined by the first position and the second position.

### Claim 14

A method for attaching an accessory to an accessory rail, comprising:
generating a clamping preload with respect to the accessory rail using a preload screw threaded onto a pivot shaft coupled to a mounting arm, the preload screw at the end of the pivot shaft opposite the mounting arm and a rail clamp;
gripping the accessory rail with the rail clamp supported by a cam in response to rotation of the mounting arm to a first position;
selectively restricting rotation of the mounting arm between the first position and a second position with an interlock, the interlock comprising a depressible interlock button depressible to a position allowing rotation of the mounting arm between the first position and the second position and springily biased to extend outward from a body carrying the interlock to a position blocking rotation of the mounting arm between the first position and the second position and an interlock set screw coupled to the depressible interlock button, the interlock set screw rotatable to adjust the outward extension of the depressible interlock button from the body; and
releasing the rail clamp in response to rotation of the mounting arm to the second position.

### Claim 15 (depends on 14)

The method of claim 14, comprising depressing the interlock button to permit rotation of the mounting arm between the first and the second position.

### Claim 16 (depends on 14)

The method of claim 14, comprising receiving the accessory rail into a rail engagement interface channel narrower at one end.

### Claim 17 (depends on 14)

The method of claim 14, comprising configuring the cam to prohibit rotation of the mounting arm beyond rotational endpoints defined by the first position and the second position.