Patents Assigned to CONSTRUCTION TOOLS PC AB
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Patent number: 10538972Abstract: An arrangement for feeding at least a part of a drilling machine in at least a first direction. A drilling system and a method are provided. The arrangement includes a first end portion, a second end portion, an outer cylinder, a piston and a piston rod. The piston and the piston rod are displaceably arranged in the outer cylinder such that the piston and the piston rod, the outer cylinder and the end portions delimits a first chamber and a second chamber for a pressure medium in the outer cylinder on a respective side of the piston. A valve is connected to the first chamber for reducing the pressure medium in the first chamber. The valve is arranged to be opened at an increased pressure in the second chamber.Type: GrantFiled: October 30, 2014Date of Patent: January 21, 2020Assignee: CONSTRUCTION TOOLS PC ABInventors: Magnus Karlsson, Anders Lundgren, Robert Ivertsson
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Publication number: 20190145061Abstract: A rig mounted compactor is provided. The rig mounted compactor comprises a shaft rotatably arranged to cause vibration of the rig mounted compactor with a first amplitude and a second amplitude by means of a first weight and a second weight and a hydraulic motor arranged to drive the shaft. The first weight is eccentrically fixed to the shaft, and the second weight is eccentrically arranged at the shaft. The second weight is clutchable between an idle mode when driven in the direction, and a rotatable mode when driven in the direction. The second weight is arranged to idle with respect to the shaft in the idle mode. The shaft is arranged to cause the first amplitude of the vibration by the first weight in the idle mode, and the second weight is arranged to rotate synchronously with the shaft in the rotatable mode to cause the second amplitude of the vibration.Type: ApplicationFiled: April 12, 2017Publication date: May 16, 2019Applicant: CONSTRUCTION TOOLS PC ABInventor: Vladislav PETROV
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Patent number: 10240355Abstract: An apparatus for tying a wire 46; 52 around one or more objects such as concrete reinforcing bars 2 is disclosed. It comprises means for passing the wire 46; 52 in a loop around the bars and a rotatable head 4 for twisting the ends of the loop together. The head 4 has at least one gripping means such as a variable force clutch 32 for gripping the wire, the gripping means being adapted to provide a variable gripping force so as to apply a predetermined tension to the wire during at least a first phase of twisting. Also disclosed is pre-feeding the wire between tying operations; conditioning the surface of the wire; and using the electrical conductivity of the reinforcing bars to verify that the bars are present before tying.Type: GrantFiled: February 2, 2017Date of Patent: March 26, 2019Assignee: Construction Tools PC ABInventors: Ian David Coles, Graham Frank Barnes, Paul Anthony Goater, Matthew John Wilson, Roger Frank Duckworth
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Patent number: 9938770Abstract: A slide valve for a hydraulic percussion device. The slide valve includes a transition surface that is arranged to alternately be subjected to a working pressure and a tank pressure to carry out a reciprocating movement when the percussion device is in use. The slide valve includes at least one channel that is open at one end of the slide valve, and at least one displaceable pin that is arranged inside the at least one channel.Type: GrantFiled: February 11, 2013Date of Patent: April 10, 2018Assignee: CONSTRUCTION TOOLS PC ABInventor: Anders Lundgren
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Patent number: 9764457Abstract: A percussion device including a shank adaptor, a machine housing that contains a percussion piston that is arranged to carry out a reciprocating movement caused by the pressure from a hydraulic fluid and to strike the shank adaptor when the percussion device is in use. An elastic element is arranged radially outwards from the percussion piston to dampen the recoil from the shank adaptor. The machine housing has an inner surface that faces the percussion piston. The elastic element has an inner surface that faces the percussion piston and an outer surface that faces the inner surface of the machine housing. At least a part of the outer surface of the elastic element directly faces the inner surface of the machine housing.Type: GrantFiled: February 11, 2013Date of Patent: September 19, 2017Assignee: CONSTRUCTION TOOLS PC ABInventor: Anders Lundgren
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Patent number: 9670743Abstract: A rock drill machine with a feed leg. The feed leg is attached to the rock drill machine with one end and rests on a support with another end. The feed leg is configured to feed the rock drill machine in a drilling direction and to interrupt feeding of the rock drill machine in the drilling direction. A control regulates the feed leg and a starter activates the rock drill machine. The control is provided on a rear handle in close proximity to the starter such that the control and the starter can be reached at the same time with one hand. Hereby, it is possible, with one hand, to activate and interrupt activation of the rock drill machine respectively, and simultaneously regulate the feed leg to feed the rock drill machine in the drilling direction and interrupt the feeding of the rock drill machine in the drilling direction.Type: GrantFiled: February 11, 2013Date of Patent: June 6, 2017Assignee: CONSTRUCTION TOOLS PC ABInventor: Magnus Karlsson
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Patent number: 9670942Abstract: A separate hydraulic power pack for providing at least one user with an oil flow. The hydraulic unit includes a motor, a hydraulic pump driven by the motor, a tank, an oil inlet, an oil outlet, a heat exchanger, and a first conduit system for oil. The first conduit system connects at least the oil inlet, the heat exchanger, the oil tank, the hydraulic pump and the oil outlet. The heat exchanger is provided for liquid cooling of the oil. A cooling liquid inlet for connection to a cooling liquid source, a first cooling liquid outlet and a second conduit system for a cooling liquid.Type: GrantFiled: February 11, 2013Date of Patent: June 6, 2017Assignee: CONSTRUCTION TOOLS PC ABInventors: Magnus Karlsson, Torkel Danielsson
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Patent number: 9630306Abstract: A pressure accumulator for connection to a hydraulic fluid-driven percussion device. The percussion device includes at least one impact piston arranged to carry out a reciprocating motion caused by the pressure from the hydraulic fluid. The pressure accumulator is arranged in communication with a hydraulic fluid space of the impact piston. The pressure accumulator includes a space that extends at least partly around the impact piston when the pressure accumulator is mounted on the percussion device. A partition divides the space into two separate pressure chambers so that the pressure chambers are located an axial direction of the impact piston in relation to each other when the pressure accumulator is mounted on the percussion device. A first of the two separate pressure chambers is intended to be filled with a compressible medium. A second pressure chamber is in fluid communication with the hydraulic fluid space of the impact piston.Type: GrantFiled: February 11, 2013Date of Patent: April 25, 2017Assignee: CONSTRUCTION TOOLS PC ABInventor: Anders Lundgren
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Patent number: 9593496Abstract: An apparatus for tying a wire (46, 52) around one or more objects such as concrete reinforcing bars (2) is disclosed. It comprises means for passing the wire (46, 52) in a loop around the bars and a rotatable head 4 for twisting the ends of the loop together. The head (4) has at least one gripping means such as a variable force clutch (32) for gripping the wire, the gripping means being adapted to provide a variable gripping force so as to apply a predetermined tension to the wire during at least a first phase of twisting. Also disclosed is pre-feeding the wire between tying operations; conditioning the surface of the wire; and using the electrical conductivity of the reinforcing bars to verify that the bars are present before tying.Type: GrantFiled: October 9, 2006Date of Patent: March 14, 2017Assignee: CONSTRUCTION TOOLS PC ABInventors: Ian David Coles, Graham Frank Barnes, Paul Anthony Goater, Matthew John Wilson, Roger Frank Duckworth
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Patent number: 9457921Abstract: A receptacle for a consumable material, such as a wire spool (2), to be loaded into a machine, such as a wire tying machine (18), comprises first and second indicating means (6, 12) for identifying the receptacle, wherein one of the indicating means (6) is separable from the receptacle.Type: GrantFiled: October 29, 2007Date of Patent: October 4, 2016Assignee: CONSTRUCTION TOOLS PC ABInventors: Graham Frank Barnes, Ian David Coles
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Patent number: 9371751Abstract: The invention related to a two-stroke internal combustion engine (1), comprising a crankcase (2), which has an air intake (3), and at least one cylinder (4), which is connected to the crankcase (2) and which, together with a piston (5) arranged therein, defines a combustion chamber (6). The cylinder (4) has at least one air inlet (7), which via an air duct (8) communicates with the crankcase (2), in which a mixture of air and lubricating oil and fuel, if any, is contained. The air duct (8) is connected to the crankcase (2) via a separator (10) for cleaning of air coming from the crankcase (2) from lubricating oil and fuel, if any.Type: GrantFiled: November 27, 2007Date of Patent: June 21, 2016Assignee: Construction Tools PC ABInventor: Johan Bram
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Patent number: 9187917Abstract: A machine (4) for tying a length of wire (46) around one or more objects (2) comprising a wire feed mechanism adapted to feed wire (46) from a spool during a first phase; and to withdraw the wire (46) during a second phase, said wire feed mechanism comprising a gripping mechanism (102, 103) including a pair of rollers urged together to grip the wire (46) therebetween and drive it in the appropriate direction, said gripping mechanism (102, 103) being configured such that during said second phase, increasing tension in the wire (46) automatically increases the gripping force on the wire (46).Type: GrantFiled: April 16, 2010Date of Patent: November 17, 2015Assignee: CONSTRUCTION TOOLS PC ABInventors: Graham Frank Barnes, Ian David Coles, Paul Anthony Goater
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Patent number: 9050714Abstract: The invention relates to a hand-held demolition tool (1) comprising a cylinder (2), a rear handle (6) and a flexible coupling (4) for the flexible connection of the cylinder (2) and the rear handle (6). According to the invention, the flexibility of the coupling (4) is arranged such that it allows flexibility only in the property pivot action between the cylinder (2) and the rear handle (6) around a rigid theoretical axis (9).Type: GrantFiled: June 1, 2010Date of Patent: June 9, 2015Assignee: Construction Tools PC ABInventors: Daniel Gustafsson, Olof Ă–stensson, Per Gustafsson
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Publication number: 20150083501Abstract: A slide valve for a hydraulic percussion device. The slide valve includes a transition surface that is arranged to alternately be subjected to a working pressure and a tank pressure to carry out a reciprocating movement when the percussion device is in use. The slide valve includes at least one channel that is open at one end of the slide valve, and at least one displaceable pin that is arranged inside the at least one channel.Type: ApplicationFiled: February 11, 2013Publication date: March 26, 2015Applicant: CONSTRUCTION TOOLS PC ABInventor: Anders Lundgren
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Patent number: 8967290Abstract: The invention relates to a fuel-powered breaker machine (1) which has a cylinder (2, 2.3, 2.4) with two pistons (3, 4) disposed therein. The first of the pistons (3) is adapted to opening and closing at least an inlet aperture (5, 6) on an inlet side (I) in a cylinder shell wall (7), and an outlet aperture (8) on an opposite outlet side (O) in the cylinder shell wall (7), and, when the apertures (5, 6, 8) are closed, to compressing against the second piston (4), which acts as the working piston of the breaker machine (1), an ignitable air/fuel mixture which is admitted via the inlet aperture/apertures (5, 6).Type: GrantFiled: June 17, 2008Date of Patent: March 3, 2015Assignee: Construction Tools PC ABInventor: Johan Bram
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Publication number: 20150053076Abstract: A pressure accumulator for connection to a hydraulic fluid-driven percussion device. The percussion device includes at least one impact piston arranged to carry out a reciprocating motion caused by the pressure from the hydraulic fluid. The pressure accumulator is arranged in communication with a hydraulic fluid space of the impact piston. The pressure accumulator includes a space that extends at least partly around the impact piston when the pressure accumulator is mounted on the percussion device. A partition divides the space into two separate pressure chambers so that the pressure chambers are located an axial direction of the impact piston in relation to each other when the pressure accumulator is mounted on the percussion device. A first of the two separate pressure chambers is intended to be filled with a compressible medium. A second pressure chamber is in fluid communication with the hydraulic fluid space of the impact piston.Type: ApplicationFiled: February 11, 2013Publication date: February 26, 2015Applicant: Construction Tools PC ABInventor: Anders Lundgren
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Patent number: 8955616Abstract: A pneumatic percussion tool (1) for demolition and/or breaking work is connectable to an insert tool (2). The percussion tool has a percussion cylinder (4), a piston (5), arranged to travel in the bore of the cylinder (4), a buffer (8), and a valve unit (6), acting on the piston (5) during operation to produce a repetitive reciprocating motion in the bore of the cylinder (4) by alternately applying pressure to the upper or lower end of the cylinder (4) while the insert tool (2) is influenced by the stroke of the piston (5) at its dead center at the lower end of the cylinder (4). The percussion tool prevents the reciprocating motion of the piston when the buffer (8) reaches a predetermined degree of wear and the tool is not pressed against any object being worked.Type: GrantFiled: March 31, 2009Date of Patent: February 17, 2015Assignee: Construction Tools PC ABInventor: Olof Ă–stensson
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Publication number: 20150027784Abstract: A rock drill machine with a feed leg. The feed leg is attached to the rock drill machine with one end and rests on a support with another end. The feed leg is configured to feed the rock drill machine in a drilling direction and to interrupt feeding of the rock drill machine in the drilling direction. A control regulates the feed leg and a starter activates the rock drill machine. The control is provided on a rear handle in close proximity to the starter such that the control and the starter can be reached at the same time with one hand. Hereby, it is possible, with one hand, to activate and interrupt activation of the rock drill machine respectively, and simultaneously regulate the feed leg to feed the rock drill machine in the drilling direction and interrupt the feeding of the rock drill machine in the drilling direction.Type: ApplicationFiled: February 11, 2013Publication date: January 29, 2015Applicant: CONSTRUCTION TOOLS PC ABInventor: Magnus Karlsson
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Publication number: 20150013321Abstract: A separate hydraulic power pack for providing at least one user with an oil flow. The hydraulic unit includes a motor, a hydraulic pump driven by the motor, a tank, an oil inlet, an oil outlet, a heat exchanger, and a first conduit system for oil. The first conduit system connects at least the oil inlet, the heat exchanger, the oil tank, the hydraulic pump and the oil outlet. The heat exchanger is provided for liquid cooling of the oil. A cooling liquid inlet for connection to a cooling liquid source, a first cooling liquid outlet and a second conduit system for a cooling liquid.Type: ApplicationFiled: February 11, 2013Publication date: January 15, 2015Applicant: CONSTRUCTION TOOLS PC ABInventors: Magnus Karlsson, Torkel Danielsson