Patents by Inventor Erik Roland Rahm
Erik Roland Rahm 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: 8002098Abstract: A torque responsive release clutch intended for a power nutrunner and comprises a driving clutch half (11) and a driven clutch half (10) coupled to each other for torque transfer by means of axially directed teeth (16, 17), wherein one of the clutch halves is axially movable between an engagement position and a release position against the action of a bias spring (13). Each one of the teeth (16) of one of the clutch halves (10) has a substantially prismatic shape and extends axially from a base portion (19) to a top portion (20) and comprises two surfaces (22, 23) which form between them a ridge (25). The base portion (19) of the tooth (16) has a radial extent from an inner diameter (d1 to an outer diameter (d2), and the ridge (25) extends from the inner diameter (d1 at the base portion (19) to the outer diameter (d2) at the top portion (20).Type: GrantFiled: November 17, 2006Date of Patent: August 23, 2011Assignee: Atlas Copco Tools ABInventor: Erik Roland Rahm
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Publication number: 20090120248Abstract: A torque responsive release clutch intended for a power nutrunner and comprises a driving clutch half (11) and a driven clutch half (10) coupled to each other for torque transfer by means of axially directed teeth (16, 17), wherein one of the clutch halves is axially movable between an engagement position and a release position against the action of a bias spring (13). Each one of the teeth (16) of one of the clutch halves (10) has a substantially prismatic shape and extends axially from a base portion (19) to a top portion (20) and comprises two surfaces (22, 23) which form between them a ridge (25). The base portion (19) of the tooth (16) has a radial extent from an inner diameter (d1 to an outer diameter (d2), and the ridge (25) extends from the inner diameter (d1 at the base portion (19) to the outer diameter (d2) at the top portion (20).Type: ApplicationFiled: November 17, 2006Publication date: May 14, 2009Applicant: Atlas Copco Tools ABInventor: Erik Roland Rahm
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Patent number: 7134509Abstract: A portable power tool is provided which includes a rotation motor (11), an output shaft (14), a gearing (13) and a drive spindle (12; 112) connecting the gearing (13) to the motor (11). A drive line arresting lock device (17; 117) is provided to facilitate loosening and/or tightening of a working implement mounting device (15), and a releasable safety clutch (23; 123) is provided between the lock device (17; 117) and the gearing (13) for protecting the gearing (13) against transmission of detrimental excessive torque magnitudes manually applied on the output shaft/mounting device (14, 15).Type: GrantFiled: October 15, 2002Date of Patent: November 14, 2006Assignee: Atlas Copco Tools ABInventor: Erik Roland Rahm
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Patent number: 7077255Abstract: A pneumatic power nut runner with a rotation motor which is connected to a drive train including a torque responsive release clutch (10) and a disengageable torque non-responsive clutch (11), a pressure air inlet valve (12), and an activation mechanism (49, 50) for automatic power shut-off at the attainment of a desired maximum torque level. The activation mechanism (49, 50) comprises a transversely displaceable latch element (49) provided with a blind bore (54) for permitting closure of the inlet valve (12) and a depression (55) for allowing engagement of the torque non-responsive clutch (11), wherein a transverse displacement of the latch element (49) at the attainment of the desired torque level results in a freeing of the inlet valve (12) for displacement toward closed position and a forcing of the torque non-responsive clutch (11) out of engagement.Type: GrantFiled: February 19, 2003Date of Patent: July 18, 2006Assignee: Atlas Copco Tools ABInventor: Erik Roland Rahm
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Publication number: 20040206524Abstract: A portable power tool comprising a rotation motor (11), an output shaft (14), a gearing (13) and a drive spindle (12;112) connecting the gearing (13) to the motor (11), wherein a drive line arresting lock device (17; 117) is provided to facilitate loosening and/or tightening of a working implement mounting device (15), and a releasable safety clutch (23; 123) is provided between the lock device (17; 117) and the gearing (13) for protecting the gearing—(13) against transmission of detrimental excessive torque magnitudes manually applied on the output shaft/mounting device (14, 15).Type: ApplicationFiled: April 13, 2004Publication date: October 21, 2004Inventor: Erik Roland Rahm
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Patent number: 6076438Abstract: A power nutrunner includes a planetary reduction gearing (12) and a torque limiting release clutch (13) disposed between a ring gear (25) of the reduction gearing (12) and the tool housing (11), wherein the ring gear (25) is tubular in shape and has an outer annular shoulder (41) at its one end carrying cam teeth (42) for cooperation with a spring biased thrust element (45) via balls (43) and cam surfaces (44). The thrust element (45) encircles the ring gear (25) and is biased by a pretensioned spring (53) which is backed by an adjustable support (52) including a rotatable screw element (70) connected to the housing (11) and provided with gear teeth (74) to be engaged by a setting tool (80) inserted through a front opening (79) in the housing (11).Type: GrantFiled: September 10, 1998Date of Patent: June 20, 2000Assignee: Atlas Copco Tools ABInventor: Erik Roland Rahm
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Patent number: 6062114Abstract: A power nutrunner has two consecutive planetary reduction gearings (12) and a torque limiting release clutch (13) disposed between a common ring gear (25) of the reduction gearings (12) and the tool housing (11). The ring gear (25) is tubular in shape and has an outer annular shoulder (41) at its one end carrying cam teeth (42) for cooperation with a spring biased thrust element (45) via balls (43) and cam surfaces (44). The thrust element (45) encircles the ring gear (25) and is rotationally locked relative to the housing (11) via a ball spline connection (47-49).Type: GrantFiled: September 10, 1998Date of Patent: May 16, 2000Assignee: Atlas Copco Tools ABInventor: Erik Roland Rahm
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Patent number: 5954142Abstract: A pneumatic power tool includes a housing (10) with a pistol handle (11), a pneumatic motor provided in the housing (10), a pressure air inlet passage (13) and an exhaust air passage (14) extending substantially in parallel through the pistol handle (11), and a manually operable throttle valve (12) provided in the housing (10). The pistol handle (11) includes: (i) a tubular stem (20) rigidly secured to the housing (10) and forming a portion of the air inlet passage (13), (ii) a separate hollow grip element (30) surrounding at least partly the tubular stem (20) and defining together with the tubular stem (20) a portion of the exhaust air passage (14), and (iii) a clamping device (22-24,28,29) arranged to detachably secure the grip element (30) to the housing (10).Type: GrantFiled: April 9, 1997Date of Patent: September 21, 1999Assignee: Atlas Copco Tools ABInventor: Erik Roland Rahm
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Patent number: 5797462Abstract: A pneumatic power tool comprises a housing (10) with a pistol type handle (11), a motor located in the housing (10), a pressure air inlet passage (13) and an exhaust air passage (14) both extending through the handle (11) in substantially parallel with each other, and a manually operable throttle valve assembly (12) having two in sequence activatable valve elements (51, 53) for smooth starting and slow running of the motor, and a rotatable sleeve (40) for shifting between two positions corresponding to "forward" and "reverse" operation of the tool, respectively.Type: GrantFiled: June 10, 1996Date of Patent: August 25, 1998Assignee: Atlas Copco Tools ABInventor: Erik Roland Rahm
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Patent number: 5775186Abstract: A power screw driver for tightening self-tapping screws comprises a housing (10), a rotation motor, an output shaft (12), a torque limiting release clutch (11) having torque transferring cam unit (17, 19) and a spring biassed thrust element (20) exerting an engagement force on the cam unit (17, 19) and yielding axially to a release position as a desired output torque is reached. A screw bed (32) engaging contact member (31) coupled is to an activation unit (42) and is arranged to be axially displaced via the activation unit (42) of the activation means (42) a lock means (36, 39) from a thrust element (20) locking position during the thread forming phase of the tightening process to a thrust element (20) unlocking position during the final pretensioning phase.Type: GrantFiled: November 15, 1996Date of Patent: July 7, 1998Assignee: Atlas Copco Tools ABInventor: Erik Roland Rahm