Patents by Inventor Juha Aalto
Juha Aalto has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8931198Abstract: A firearm which is modifiable by the user such that a firearm barrel is arranged replaceable by the user, wherein the firearm comprises a barrel unit, which is detachable by the user and fastenable to a receiver, which barrel unit comprises the barrel and a locking piece, wherein the locking piece has a backward narrowing rear cone, which fits a cone in the receiver and which has a forward narrowing front cone, and which fits a cone in the centering bush, wherein to the centering bush is rotatably connected a clamping bush having an outer thread which fits an inner thread in the receiver, wherein by rotating the clamping bush in the locked direction, the rear end of the locking piece is centerable by means of the rear cone and lockable to the cone in the receiver.Type: GrantFiled: January 17, 2011Date of Patent: January 13, 2015Assignee: Sako OyInventor: Juha Aalto
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Publication number: 20130291420Abstract: A firearm which is modifiable by the user such that a firearm barrel is arranged replaceable by the user, wherein the firearm comprises a barrel unit, which is detachable by the user and fastenable to a receiver, which barrel unit comprises the barrel and a locking piece, wherein the locking piece has a backward narrowing rear cone, which fits a cone in the receiver and which has a forward narrowing front cone, and which fits a cone in the centering bush, wherein to the centering bush is rotatably connected a clamping bush having an outer thread which fits an inner thread in the receiver, wherein by rotating the clamping bush in the locked direction, the rear end of the locking piece is centerable by means of the rear cone and lockable to the cone in the receiver.Type: ApplicationFiled: January 17, 2011Publication date: November 7, 2013Applicant: SAKO OYInventor: Juha Aalto
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Patent number: 8099896Abstract: A rifle with a replaceable barrel with two or more barrels for different purposes and calibers and with own magazines for different cartridges. At least one barrel (1) has the cavity (2), into which a projection or upper edge (4) in the cartridge magazine (3) corresponding to the barrel fits, when the right magazine has been inserted into the rifle.Type: GrantFiled: July 7, 2005Date of Patent: January 24, 2012Assignee: Sako OyInventors: Henry Paasikivi, Juha Aalto
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Patent number: 7854083Abstract: A cartridge magazine for firearms has an elongated channel to receive a plurality of cartridges. The cartridge magazine has a box forming a housing of the cartridge magazine, a spring operated follower for pressing the cartridges in the magazine to an upper position. In this position, the topmost cartridge is ready for feeding into a chamber of the firearm and in this position the topmost cartridge rests against a pair of retaining lips. The lips remain in a first position when the topmost cartridge is in the upper position and the lips are operatively displaceable to a second position wider than the first position.Type: GrantFiled: June 28, 2007Date of Patent: December 21, 2010Assignee: Sako OyInventor: Juha Aalto
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Publication number: 20100313458Abstract: A cartridge magazine for firearms has an elongated channel to receive a plurality of cartridges. The cartridge magazine has a box forming a housing of the cartridge magazine, a spring operated follower for pressing the cartridges in the magazine to an upper position. In this position, the topmost cartridge is ready for feeding into a chamber of the firearm and in this position the topmost cartridge rests against a pair of retaining lips. The lips remain in a first position when the topmost cartridge is in the upper position and the lips are operatively displaceable to a second position wider than the first position.Type: ApplicationFiled: June 28, 2007Publication date: December 16, 2010Inventor: Juha Aalto
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Publication number: 20100180484Abstract: A stock (10) for a firearm, provided with a stock frame section (3) and a releasably attachable cheekpiece (1, 2), in which the stock frame section (3) is symmetrical in relation to the longitudinal vertical direction of the stock, and when the cheekpiece (1, 2) is installed to the left side of the stock frame section (3), the stock becomes a right-handed stock, and when the cheekpiece (1, 2) is installed to the right side of the stock frame section (3), the stock becomes a left-handed stock. According to an advantageous embodiment the cheekpiece (1, 2) is adjustable, preferably quick-adjustable in height.Type: ApplicationFiled: January 17, 2007Publication date: July 22, 2010Inventors: Juha Aalto, Kari Kuparinen
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Patent number: 7587853Abstract: A system for fastening the barrel (1) of a rifle with a replaceable barrel, the system consisting of a lock frame (2), into which the barrel socket (5) can be inserted into position and locked by a bolting device. The bolting device consists of a barrel block stop (4) provided at the top of the lock frame (2), a groove (6) in the barrel socket being insertable into the block stop when the barrel is clamped into locked position.Type: GrantFiled: February 10, 2005Date of Patent: September 15, 2009Assignee: Sako OyInventor: Juha Aalto
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Publication number: 20080178510Abstract: A rifle with a replaceable barrel with two or more barrels for different purposes and calibres and with own cases for different cartridges. At least one barrel (1) has the cavity (2), into which a projection or upper edge (4) in the cartridge case (3) corresponding to the barrel fits, when the correct case has been inserted into the rifle.Type: ApplicationFiled: July 7, 2005Publication date: July 31, 2008Inventors: Henry Paasikivi, Juha Aalto
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Publication number: 20080066361Abstract: A system for fastening the barrel (1) of a rifle with a replaceable barrel, the system consisting of a lock frame (2), into which the barrel socket (5) can be inserted into position and locked by a bolting device. The bolting device consists of a barrel block stop (4) provided at the top of the lock frame (2), a groove (6) in the barrel socket being insertable into the block stop when the barrel is clamped into locked position.Type: ApplicationFiled: February 10, 2005Publication date: March 20, 2008Applicant: SAKO OYInventor: Juha Aalto
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Patent number: 6978709Abstract: A breech device for bolt-action firearms includes a breech body reciprocating in the receiver and rotatable into locking position. In its front part, the breech body has locking lugs located in three sectors, the locking lugs in at least two sectors being formed in a breech device equipped with a magazine loaded in parallel so that there are four guide surfaces to limit rotation between the receiver and the breech body, and the breech body has a recessed locking surface for the cartridge at its end. The locking surface of the cartridge has been extended downwardly to form a glide surface passing between the locking lugs so that the rear surface of the cartridge case slides on the glide surface and the locking surface into locking position as the cartridge is ejected from the magazine into the cartridge housing.Type: GrantFiled: March 5, 2002Date of Patent: December 27, 2005Assignee: Sako OyInventors: Juha Aalto, Kari Kuparinen
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Publication number: 20040168362Abstract: A breech device for bolt-action firearms includes a breech body reciprocating in the receiver and rotatable into locking position. In its front part, the breech body has locking lugs located in three sectors, the locking lugs in at least two sectors being formed in a breech device equipped with a magazine loaded in parallel so that there are four guide surfaces to limit rotation between the receiver and the breech body, and the breech body has a recessed locking surface for the cartridge at its end. The locking surface of the cartridge has been extended downwardly to form a glide surface passing between the locking lugs so that the rear surface of the cartridge case slides on the glide surface and the locking surface into locking position as the cartridge is ejected from the magazine into the cartridge housing.Type: ApplicationFiled: April 6, 2004Publication date: September 2, 2004Inventors: Juha Aalto, Kari Kuparinen
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Publication number: 20040148842Abstract: A rapid clamping base for an open rifle sights, the base includes a front frame and a rear frame, whose clamping rings retain the sight. The frames can be clamped by a retainer to a clamping rail in a gun. The claws provided in the front frame are provided at different locations relative to the longitudinal direction of the rails so as to be pressed in engagement with the edges of the rail when the optic sight is turned in the horizontal plane from the lateral direction to the central line of the gun. The front frame also includes a support tongue. The rear frame includes claws engaging the clamping rail. The rear frame includes a support tongue extending downwards and bearing against the front edge of the rear clamping rail.Type: ApplicationFiled: March 22, 2004Publication date: August 5, 2004Inventors: Juha Aalto, Kari Kuparinen
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Patent number: 6000161Abstract: The invention relates to a breech mechanism in a bolt-action firearm, consisting of a breech body (2) reciprocating in the receiver (1) and rotatable into locking position, and having on its front portion a locking lug (3, 4, 5) placed in three sectors. The locking lugs (4, 5) in at least two sectors have been formed in a breech mechanism provided with a parallel loading magazine (6) such that there are four guide surfaces (7, 8, 9, 10) limiting breech rotation between the receiver (1) and the breech body (2).Type: GrantFiled: January 29, 1998Date of Patent: December 14, 1999Assignee: Sako OyInventor: Juha Aalto