Patents by Inventor Rolf Alexis Jacobsson
Rolf Alexis Jacobsson 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: 6908277Abstract: A speed governor for a pneumatic rotation motor having a pressure air inlet passage (15, 15?), an inlet valve (16; 56) including a flow controlling valve element (18; 58) located in the inlet passage (15, 15?), and a speed responsive activating device (24; 54) operatively connected to the inlet valve (16; 56), wherein the activating device (24, 54) comprises a pilot circuit with an activating surface (20; 70) on the valve element (18; 58), a restricted air supply opening (21, 72) communicating with the activating surface (20; 70), a bleed-off valve (24; 54) which communicates with the activating surface (20; 70) and which comprises an electromagnet actuator (27; 76), and a generator (30) driven by the motor and delivering to the actuator (27; 76) a voltage of a magnitude responsive to the actual motor speed to thereby make the bleed-off valve (24; 54) operate in response to the output voltage of the generator (30) and the actual motor speed.Type: GrantFiled: December 20, 2001Date of Patent: June 21, 2005Assignee: Atlas Copco Tools ABInventor: Rolf Alexis Jacobsson
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Patent number: 6840723Abstract: A working unit intended to be mounted on a movable machine operated tool support includes a casing which is attached to the tool support and which supports a pneumatic turbine motor with a rotor a shank end mill type machining tool with a cutter portion extending out of the casing and a shank portion rotatively journalled in the casing. The machining tool shank portion is rigidly integrated with a turbine wheel to form the turbine rotor. A flow control valve is arranged to deliver pressure air to the turbine motor. The turbine rotor is provided with a generator device for delivering a speed responsive output voltage to a control unit which is arranged to make the flow control valve adjust the power supply to the rotation motox so as to maintain the rotation speed at a desired predetermined level.Type: GrantFiled: December 20, 2001Date of Patent: January 11, 2005Assignee: Atlas Copco Tools ABInventor: Rolf Alexis Jacobsson
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Patent number: 6705834Abstract: An axial flow turbine machine intended for elastic fluid operation is provided which includes a rotor with two or more sections each carrying an array of radially directed drive blades, and a stator having a number of fluid inlet nozzles and one or more sections each carrying a circumferential array of guide vanes for directing motive fluid onto the drive blades. A rotor flow path is formed between every two adjacent drive blades in each rotor section and a stator flow path is formed between every two adjacent guide vanes in each stator section. A widened section is provided between the entrance section and the exit section of each rotor section flow path and each stator section flow path, such that the radial distance between the inner flow path defining surface and the outer flow path defining surface is larger in the widened section than in the exit section.Type: GrantFiled: June 13, 2002Date of Patent: March 16, 2004Assignee: Atlas Copco Tools ABInventor: Rolf Alexis Jacobsson
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Publication number: 20040040295Abstract: A speed governor for a pneumatic rotation motor having a pressure air inlet passage (15, 15′), an inlet valve (16; 56) including a flow controlling valve element (18; 58) located in the inlet passage (15, 15′), and a speed responsive activating device (24; 54) operatively connected to the inlet valve (16; 56), wherein the activating device (24, 54) comprises a pilot circuit with an activating surface (20; 70) on the valve element (18; 58), a restricted air supply opening (21, 72) communicating with the activating surface (20; 70), a bleed-off valve (24; 54) which communicates with the activating surface (20; 70) and which comprises an electromagnet actuator (27; 76), and a generator (30) driven by the motor and delivering to the actuator (27; 76) a voltage of a magnitude responsive to the actual motor speed to thereby make the bleed-off valve (24; 54) operate in response to the output voltage of the generator (30) and the actual motor speed.Type: ApplicationFiled: June 18, 2003Publication date: March 4, 2004Applicant: Atlas Copco Tools ABInventor: Rolf Alexis Jacobsson
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Publication number: 20040042864Abstract: A working unit intended to be mounted on a movable machine operated tool support comprises a casing (10) which is attached to the tool support and which supports a pneumatic turbine motor (23, 24, 51) with a rotor (19), and a shank end mill type machining tool (22,21) with a cutter portion (21) extending out of the casing (10) and a shank portion (22) rotatively journalled in the casing (10), whereing the machining tool shank portion (22) is rigidly integrated with a turbine whell (24) to form the turbine rotor (19), a flow control valve (48) is arranged to deliver pressure air to the turbine motor (23, 24, 51), and the turbine rotor (19) is provided with a generator device for delivering a speed responsive output voltage to a control unit (55) which is arranged to make the flow control valve 848) adjust the power supply to the rotation motor (23, 24, 51) so as to maintain the rotation speed at a desired predetermined level.Type: ApplicationFiled: June 18, 2003Publication date: March 4, 2004Applicant: Atlas Copco Tools ABInventor: Rolf Alexis Jacobsson
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Patent number: 6336790Abstract: An axial flow power tool turbine motor for operation with an elastic fluid, like pressured air, includes a housing (12), a rotor (11) rotatively journalled in the housing (12) and formed in one piece with drive blades (24) arranged in axially spaced circumferential rows (C, A, C, E, G, I, K), and a stator (10) in the form of a tubular body (22) which is immovably supported in the housing (12) and which carries internal guide vanes (23) arranged in circumferential rows (B, D, F, H, J), wherein the tubular stator body (22) is divided into three longitudinal sections (22a, 22b, 22c) with which the guide vanes (23) are integrally formed, and a retainer (27, 29) for fixing and mounting the longitudinal sections (22a, 22b, 22c) in accurately defined relative positions to form the tubular stator body (22).Type: GrantFiled: October 17, 1997Date of Patent: January 8, 2002Assignee: Atlas Copco Tools A.B.Inventor: Rolf Alexis Jacobsson
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Patent number: 6179552Abstract: A speed control unit for a pneumatic rotation motor having a stator (10) with an air inlet passage (14), a rotor (11) journalled in the stator (10). The speed control unit includes a speed governor (26) operated by two or more fly-weight members (28), and an overspeed safety device (27). The rotor (11) is formed with a coaxial blind bore (22) in which is secured a mounting structure (23) for supporting the fly-weight members (28), the valve element (29) and the bias spring (35) of the speed governor (26) inside the rotor (11). The overspeed safety device (27) includes a flow restricting element (39) displaceably guided in the air inlet passage (14) and locked in an inactive rest position by a trip element (43), and a speed responsive actuator (45) that is co-rotative with the rotor (11).Type: GrantFiled: March 25, 1999Date of Patent: January 30, 2001Assignee: Atlas Copco Tools ABInventor: Rolf Alexis Jacobsson
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Patent number: 5967243Abstract: A portable power tool for operating a wheel type working element comprises an output spindle (12) which is drivingly connected to a rotation motor (11) and which is provided with an automatic ball type balancing device (21) and a working implement mounting device (22), wherein the balancing device (21) comprises a peripheral wall (38) provided with a ball race (43), a transverse end wall (39) and a number of balls (41) freely movable along the ball race (43), and the peripheral wall (38) and the end wall (39) are formed in one piece with each other as well as with the output spindle (12).Type: GrantFiled: May 1, 1997Date of Patent: October 19, 1999Assignee: Atlas Copco Tools ABInventor: Rolf Alexis Jacobsson