# US 9,518,801 B2 · Hand guard and barrel clamp > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,518,801 B2 - Document ID: US9518801B2 - Status: Granted - Kind: B2 - Application number: 14/148,487 - Filed: 2014-01-06 - Published: 2015-07-09 - Granted: 2016-12-13 - Earliest claimed: 2014-01-06 - Applicants: Marc Krebs - Inventors: Marc Krebs - Web page: https://patentgrep.com/patent/US9518801B2 ## CPC - F41C 23/16: Forestocks; Handgrips; Hand guards (pump-action guns F41C7/02) - F16B 2/065: {using screw-thread elements (F16B2/08 - F16B2/12 take precedence)} - F16B 7/042: {with a locking element, e.g. pin, ball or pushbutton, engaging in a hole in the wall of at least one tube} - F41G 11/003: {Mountings with a dove tail element, e.g. "Picatinny rail systems"} - Y10T 24/44641: having gripping member formed from, biased by, or mounted on resilient member - F41C: SMALLARMS, e.g. PISTOLS, RIFLES (functional features or details common to both smallarms and ordnance, mountings therefor F41A; projecting missiles without use of explosive or combustible propellant charge F41B); ACCESSORIES THEREFOR - 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) - F41G: WEAPON SIGHTS; AIMING (optical aspects thereof G02B) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A hand guard is provided for a firearm, such as a rifle, and may be suitable for maintaining the alignment of the hand guard, and any accessories coupled thereto, relative to the rifle. The hand guard may be configured so that at least a portion of the hand guard can be removed from the firearm and then re-installed on the firearm without significant change in the orientation and position of the hand guard. The hand guard may also be suitable for coupling accessories such as lights, scopes, laser sights, and other firearm accessories to the firearm. ## Claims ### Claim 1 A hand guard for a firearm comprising: an elongated housing comprising an upper part, a lower part and a locking structure, the upper and lower parts defining an interior space, one of the upper and lower parts having an interior portion with a first dimension that is sized to be received within the other of the upper and lower parts at an exterior portion having a second dimension larger than the first dimension, at least one of the upper and lower parts including a protrusion extending toward the interior portion while the other of the upper and lower parts defining a slot configured to accept the protrusion, the slot being generally L-shaped to receive the protrusion and permit the upper and lower portions to move in a plurality of directions relative to one another, the locking structure abutting the interior portion and cooperating with the protrusion and slot to limit movement of the upper and lower parts relative to one another when in an installed configuration, the locking structure being movable to an unlocked position thereby permitting the upper and lower parts to move relative to one another and disengage the protrusion from the slot. ### Claim 2 (depends on 1) The hand guard of claim 1 further comprising a barrel clamp configured to secure the hand guard to the firearm. ### Claim 3 (depends on 1) The hand guard of claim 1 further comprising a first channel positioned at a wall of the exterior portion configured to receive a wall of the interior portion and a second channel positioned at an opposing wall of the exterior portion configured to receive an opposing wall of the interior portion, the first and second channels defining the second dimension. ### Claim 4 (depends on 3) The hand guard of claim 3 wherein the locking structure includes a first spring positioned at the first channel and a second spring positioned at the second channel, and the first and second springs deflect towards the interior space to permit the interior portion to be secured within the exterior portion. ### Claim 5 (depends on 1) The hand guard of claim 1 wherein the exterior portion includes a plurality of protrusions and the interior portion includes a plurality of slots configured to receive the plurality of protrusions. ### Claim 6 (depends on 1) The hand guard of claim 1 wherein the locking structure includes at least one spring that deflects towards the interior space in the unlocked position. ### Claim 7 (depends on 1) The hand guard of claim 1 wherein at least one of the upper and lower parts includes a plurality of external openings configured to receive and secure at least one firearm accessory. ### Claim 8 A hand guard for a firearm comprising: an elongated housing comprising an upper part, a lower part and a locking structure, the upper and lower parts defining an interior space, one of the upper and lower parts having an interior portion with a first dimension that is sized to be received within the other of the upper and lower parts at an exterior portion having a second dimension larger than the first dimension, at least one of the upper and lower parts including a protrusion extending toward the interior portion while the other of the upper and lower parts defining a slot configured to accept the protrusion, the locking structure abutting the interior portion and cooperating with the protrusion and slot to limit movement of the upper and lower parts relative to one another when in an installed configuration, the locking structure being movable to an unlocked position thereby permitting the upper and lower parts to move relative to one another and disengage the protrusion from the slot; and a barrel clamp including a barrel engaging portion, a first housing engaging portion and a second housing engaging portion, the barrel engaging portion extending between the first housing engaging portion and the second housing engaging portion, the first and second housing engaging portions each including a partially threaded portion such that when the first and second housing engaging portions are positioned adjacent one another the partially threaded portions define a threaded opening extending in a first direction for receiving a fastener, the barrel clamp extending from the firearm and being operably coupled at least one of the upper and lower parts via a fastener extending into the threaded opening when in the installed configuration. ### Claim 9 (depends on 8) The hand guard of claim 8 further comprising a barrel clamp configured to secure the hand guard to the firearm. ### Claim 10 (depends on 8) The hand guard of claim 8 further comprising a first channel positioned at a wall of the exterior portion configured to receive a wall of the interior portion and a second channel positioned at an opposing wall of the exterior portion configured to receive an opposing wall of the interior portion, the first and second channels defining the second dimension. ### Claim 11 (depends on 10) The hand guard of claim 10 wherein the locking structure includes a first spring positioned at the first channel and a second spring positioned at the second channel, and the first and second springs deflect towards the interior space to permit the interior portion to be secured within the exterior portion. ### Claim 12 (depends on 8) The hand guard of claim 8 wherein the exterior portion includes a plurality of protrusions and the interior portion includes a plurality of slots configured to receive the plurality of protrusions. ### Claim 13 (depends on 8) The hand guard of claim 8 wherein the slot is generally L-shaped to receive the protrusion and permit the upper and lower portions to move in a plurality of directions relative to one another. ### Claim 14 (depends on 8) The hand guard of claim 8 wherein the locking structure includes at least one spring that deflects towards the interior space in the unlocked position. ### Claim 15 (depends on 8) The hand guard of claim 8 wherein one of the upper and lower parts includes a toothed portion, the first housing engaging portion includes an upper portion having a first plurality of aligned teeth and the second housing engaging portion includes an upper portion having a second plurality of aligned teeth, the first and second plurality of aligned teeth being in alignment with one another when the first and second housing engaging portions are positioned adjacent one another and configured to cooperate with the toothed portion. ### Claim 16 (depends on 8) The hand guard of claim 8 further comprising a first opening extending through the first housing engaging portion and a second opening extending through the second housing engaging portion, the first and second openings aligning with one another when the first and second openings are positioned adjacent one another to permit a fastener to pass therethrough in a direction that is substantially perpendicular to the first direction of the threaded opening. ### Claim 17 (depends on 8) The hand guard of claim 8 wherein at least one of the upper and lower parts includes a plurality of external openings configured to receive and secure at least one firearm accessory. ### Claim 18 A hand guard for a firearm comprising: an elongated housing comprising an upper part, a lower part and a locking structure, the upper and lower parts defining an interior space, one of the upper and lower parts having an interior portion with a first dimension that is sized to be received within the other of the upper and lower parts at an exterior portion having a second dimension larger than the first dimension, at least one of the upper and lower parts including a protrusion extending toward the interior portion while the other of the upper and lower parts defining a slot configured to accept the protrusion, the locking structure abutting the interior portion and cooperating with the protrusion and slot to limit movement of the upper and lower parts relative to one another when in an installed configuration, the locking structure being movable inwardly towards the interior space to an unlocked position thereby permitting the upper and lower parts to move relative to one another and disengage the protrusion from the slot.