Patents by Inventor Robert Sjolander
Robert Sjolander 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: 8827773Abstract: A locking means for a bit holder fixture for use with grinding apparatus for grinding the hard metal inserts of rock drill bits is provided. The locking means has a macro adjustment for quick positioning of a pressure plate against the body of the bit(s) and a micro adjustment to lock the bit(s) in place by applying pressure against the skirt or shank of the drill bit(s).Type: GrantFiled: July 8, 2009Date of Patent: September 9, 2014Assignee: C.M.E. Blasting & Mining Equipment Ltd.Inventors: Bjorn Sjolander, Bo Thomas Sjolander, Robert Sjolander
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Publication number: 20110117826Abstract: A locking means for a bit holder fixture for use with grinding apparatus for grinding the hard metal inserts of rock drill bits is provided. The locking means has a macro adjustment for quick positioning of a pressure plate against the body of the bit(s) and a micro adjustment to lock the bit(s) in place by applying pressure against the skirt or shank of the drill bit(s).Type: ApplicationFiled: July 8, 2009Publication date: May 19, 2011Applicant: C.M.E. BLASTING & MINING EQUIPMENT LTD.Inventors: Bjorn Sjolander, Bo Thomas Sjolander, Robert Sjolander
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Patent number: 7811155Abstract: The present invention provides a grinding member or connection to a drive connection member to form a grinding cup for grinding the hard metal inserts or working tips of drill bits (percussive or rotary), tunnel boring machine cutters (TBM) and raised bore machine cutters (RBM) to restore them to substantially their original profile, said grinding member having: a. a grinding section having top and bottom surfaces, a centrally disposed convex recess formed in the bottom surface of said grinding section having the desired profile to be ground; b. a support section adjacent the top surface of said grinding section; c. means to connect the grinding member to the drive connection member wherein the grinding member can be disconnected from the drive connection member when it becomes worn.Type: GrantFiled: March 19, 2008Date of Patent: October 12, 2010Assignee: CME Blasting & Mining Equipment Ltd.Inventors: Bjorn Sjolander, Bo Thomas Sjolander, Robert Sjolander
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Publication number: 20080207102Abstract: The present invention provides a grinding member or connection to a drive connection member to form a grinding cup for grinding the hard metal inserts or working tips of drill bits (percussive or rotary), tunnel boring machine cutters (TBM) and raised bore machine cutters (RBM) to restore them to substantially their original profile, said grinding member having: a. a grinding section having top and bottom surfaces, a centrally disposed convex recess formed in the bottom surface of said grinding section having the desired profile to be ground; b. a support section adjacent the top surface of said grinding section; c. means to connect the grinding member to the drive connection member wherein the grinding member can be disconnected from the drive connection member when it becomes worn.Type: ApplicationFiled: March 19, 2008Publication date: August 28, 2008Applicant: C.M.E. BLASTING & MINING EQUIPMENT LTD.Inventors: Bjorn Sjolander, Bo Thomas Sjolander, Robert Sjolander
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Patent number: 7402093Abstract: The present invention relates to grinding apparatus for grinding the hard metal inserts of rock drill bits, said grinding apparatus having a grinding machine carried on an support system that provides a feed pressure for said grinding machine during grinding, said grinding machine equipped with a grinding pin driven by motor to rotate about its longitudinal axis wherein the grinding cup is rotated at variable speeds and the support system provides a variable feed pressure.Type: GrantFiled: February 19, 2004Date of Patent: July 22, 2008Assignee: C.M.E. Blasting & Mining Equipment LtdInventors: Bjorn Sjolander, Bo Thomas Sjolander, Robert Sjolander
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Patent number: 7198556Abstract: A grinding apparatus for grinding the hard metal inserts or working tips of drill bits (percussive or rotary), tunnel boring machine cutters (TMB) and raised bore machine cutters (RBM), said grinding apparatus having means for holding one or more bits to be ground and a grinding machine carried by an arm or lever system that permits movement of the grinding machine relative to the longitudinal axis of the button of the bit to be ground wherein means are provided to assist with aligning the grinding machine with the longitudinal axis of the button to be ground.Type: GrantFiled: July 10, 2001Date of Patent: April 3, 2007Assignee: C.M.E. Blasting & Mining Equipment Ltd.Inventors: Robert Sjolander, Bjorn Sjolander, Bo Thomas Sjolander
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Publication number: 20060105675Abstract: The present invention relates to grinding apparatus for grinding the hard metal inserts of rock drill bits, said grinding apparatus having a grinding machine carried on an support system that provides a feed pressure for said grinding machine during grinding, said grinding machine equipped with a grinding pin driven by motor to rotate about its longitudinal axis wherein the grinding cup is rotated at variable speeds and the support system provides a variable feed pressure.Type: ApplicationFiled: February 19, 2004Publication date: May 18, 2006Inventors: Bjorn Sjolander, Bo Sjolander, Robert Sjolander
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Publication number: 20050107021Abstract: The present invention provides a grinding member (2) or connection to a drive connection member (3) to form a grinding cup for grinding the hard metal inserts or working tips of drill bits (percussive or rotary), tunnel boring machine cutters (TBM) and raised bore machine cutters (RBM) to restore them to substantially their original profile, said grinding member having: a. a grinding section (4) having top (8) and bottom surfaces (10), a centrally disposed convex recess (7) formed in the bottom surface of said grinding section having the desired profile to be ground; b. a support section (9) adjacent the top surface (8) of said grinding section; c. means (13) to connect the grinding member to the drive connection member wherein the grinding member can be disconnected from the drive connection member when it becomes worn.Type: ApplicationFiled: November 21, 2002Publication date: May 19, 2005Inventors: Bjorn Sjolander, Bo Sjolander, Robert Sjolander
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Publication number: 20040014406Abstract: Abstract A grinding apparatus for grinding the hard metal inserts or working tips of drill bits (percussive or rotary), tunnel boring machine cutters (TMB) and raised bore machine cutters (RBM), said grinding apparatus having means for holding one or more bits to be ground and a grinding machine carried by an arm or lever system that permits movement of the grinding machine relative to the longitudinal axis of the button of the bit to be ground wherein means are provided to assist with aligning the grinding machine with the longitudinal axis of the button to be ground.Type: ApplicationFiled: May 15, 2003Publication date: January 22, 2004Inventors: Robert Sjolander, Bjorn Sjolander, Bo Thomas Sjolander
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Patent number: 5727994Abstract: The present invention relates to improvements in devices for use as grinding cups for grinding the hard metal pins or working tips of drill bits and more specifically, but not exclusively, for grinding the tungsten carbide cutting teeth or buttons of a drilling head and the means for detachably connecting the grinding cups to the grinding machine. The grinding cups have top and bottom surfaces and consist of a lower grinding section and an upper body section. The grinding section is formed from a material capable of grinding the tungsten carbide button bits such as a metal and diamond matrix. The peripheral edge in the bottom surface may be bevelled to facilitate the removal of steel from the face of the bit around the base of the button during grinding. A centrally disposed convex recess is formed in the bottom surface of the lower grinding section having the desired profile for the button to be ground. The upper body section has a centrally disposed cavity formed in the top surface of the grinding cup.Type: GrantFiled: February 5, 1996Date of Patent: March 17, 1998Inventors: Kurt Robert Sjolander, Bo Thomas Sjolander
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Patent number: 5639273Abstract: The present invention relates to improvements in devices for use as grinding cups for grinding the hard metal pins or working tips of drill bits and more specifically, but not exclusively, for grinding the tungsten carbide cutting teeth or buttons of a drilling head and the means for detachably connecting the grinding cups to the grinding machine. The grinding cups consisting of a bottom grinding section and a top body section having top and bottom surfaces. The grinding section is formed from a material capable of grinding the tungsten carbide button bits such as a metal and diamond matrix. The peripheral edge in the bottom surface may be bevelled to facilitate the removal of steel from the face of the bit around the base of the button during grinding. A centrally disposed convex recess is formed in the bottom surface having the desired profile for the button to be ground. The body section has a centrally disposed cavity formed in the top surface of the grinding cup.Type: GrantFiled: February 3, 1995Date of Patent: June 17, 1997Assignee: C.M.E. Blasting & Mining Equipment Ltd.Inventors: Kurt Robert Sjolander, Bo Thomas Sjolander
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Patent number: 5527206Abstract: A holder device for use in a motor driven grinding machine for grinding button bits. The grinding machine has an output shaft formed with an axially extending passageway for receiving a stem attached to and extending outwardly from a grinding cup. The shaft has interengaging drive means for driveably engaging the grinding cup to the free end of the shaft. An O-ring engages between the stem and the passageway for removably retaining the stem in the passageway.Type: GrantFiled: September 13, 1994Date of Patent: June 18, 1996Assignee: CME Blasting & Mining Equipment Ltd.Inventors: Robert Sjolander, Bo Sjolander
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Patent number: 5193312Abstract: A grinding apparatus is housed in a casing (24). The grinding machine (3) with its grinding pin (15) is journalled in a rotatable attachment (2) such as to be imparted a rocking motion. The apparatus is carried by a pair of arms (7) which are freely movable in a generally horizontal plane, the one arm (9) being mounted for vertical movement on a stand (6). This vertical movement can be adjusted to produce a balanced effect and to deliver a downwardly acting force, feed pressure. Both the balancing and the feed pressure are achieved with the aid of one single piston-cylinder device (11).Type: GrantFiled: June 25, 1991Date of Patent: March 16, 1993Inventors: Soren Gudmundsson, Dag M. Stenmark, Robert Sjolander
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Patent number: 5070654Abstract: An arrangement for grinding the hardmetal pins of drill bits, e.g. the tungsten carbide buttons (31) of button bits (1), comprises means (parallel arms pairs 9 and 10) for adjusting the position of a grinding pin (15) in relation to the drill bit (1) and also journalling means (4) operative to cause the grinding machine (3) to move relatively slowly in a circuit path around the button on the drill bit (1) to be ground and to cause the grinding pin (15) to rotate rapidly around its longitudinal axis. The drill bit is clamped securely in a stationary holder arrangement (2) which includes a tiltable table (35) which can be adjusted to and locked in selected angular positions.Type: GrantFiled: October 16, 1989Date of Patent: December 10, 1991Assignee: C.M.E. Blasting & Mining Equipment, Ltd.Inventors: Kallevi K. Manqvist, Robert Sjolander
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Patent number: D350887Type: GrantFiled: June 8, 1993Date of Patent: September 27, 1994Assignee: C. M. E. Blasting and Mining Equipment Ltd.Inventors: Robert Sjolander, Dag Stenmark