Patents by Inventor A. J. Moolenaar
A. J. Moolenaar 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: 5419745Abstract: Transmission between electric motor and tool shaft, for instance for hand tools such as an electric screwdriver and the like, which transmission is provided with an adjustable breaking coupling for discontinuing the drive torque on the tool shaft when a predetermined resistance moment on this tool shaft is exceeded, wherein the breaking coupling in the form of two mutually slidable parts is provided with a signal generator for controlling a member influencing the motor feed, which signal generator comes into operation as soon as the two parts slide relative to one another when the set torque is exceeded, so that a disengagement takes place between motor and tool shaft immediately after the desired resistance moment is exceeded, wherein the inertia of the rotating parts no longer has any effect on the tool shaft so that it stops immediately.Type: GrantFiled: September 16, 1994Date of Patent: May 30, 1995Assignee: Emerson Electric Co.Inventors: Antony J. Moolenaar, Jan P. Houben, Jacobus F. Geerts
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Patent number: 5385512Abstract: Transmission between electric motor and tool shaft, for instance for hand tools such as an electric screwdriver and the like, which transmission is provided with an adjustable breaking coupling for discontinuing the drive torque on the tool shaft when a predetermined resistance moment on this tool shaft is exceeded, wherein the breaking coupling in the form of two mutually slidable parts is provided with a signal generator for controlling a member influencing the motor feed, which signal generator comes into operation as soon as the two parts slide relative to one another when the set torque is exceeded, so that a disengagement takes place between motor and tool shaft immediately after the desired resistance moment is exceeded, wherein the inertia of the rotating parts no longer has any effect on the tool shaft so that it stops immediately.Type: GrantFiled: July 31, 1992Date of Patent: January 31, 1995Assignee: Emerson Electric Co.Inventors: Antony J. Moolenaar, Jan P. Houben, Jacobus F. Geerts
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Patent number: 5213457Abstract: The invention relates to a device for performing a machining movement with at least one rotatable planing knife, comprising: a planing knife holder fixed rotatably in a carrier with a first and a second shaft and a first and a second bearing, wherein at least the first shaft is connected fixedly to the planing knife holder and at least the first shaft is bearing mounted in the carrier; a motor fixed in the carrier; and a drive wheel which is fixed on the first shaft and coupled to the electric motor for driving the planing knife holder, wherein the second shaft is connected fixedly to the carrier and that the second bearing is arranged on the shaft inside the body of the planing knife holder.Type: GrantFiled: December 12, 1991Date of Patent: May 25, 1993Assignee: Emerson Electric Co.Inventors: Johannes M. Maas, Antonie J. Moolenaar
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Patent number: 5113951Abstract: This invention relates to a device for driving a drilling or percussion tool having a spindle that rotates with respect to a housing. One end of the spindle is adapted to fasten to a tool piece and the other end is connected to an oscillating percussion body movable in the housing by means of a guideway. A drive shaft rotates the tool spindle into rotation or actuates the percussion body via a transmission that is provided with means for converting the rotary motion of the drive shaft into an oscillatory motion of a drive member. The drive member is connected to the percussion body through an elastic member having a non-linear sping characteristic.Type: GrantFiled: June 11, 1991Date of Patent: May 19, 1992Assignee: Emerson Electric CompanyInventors: J. P. Houben, A. J. Moolenaar
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Patent number: 5052497Abstract: This invention relates to a device for driving a drilling or percussion tool having a spindle that rotates with respect to a housing. One end of the spindle is adapted to fasten to a tool piece and the other end is connected to an osciliating percussion body movable in the housing by means of a guideway. A drive shaft rotates the tool spindle into rotation or actuates the percussion body via a transmission that is provided with means for converting the rotary motion of the drive shaft into an oscillatory motion of a drive member. The drive member is connected to the percussion body through an elastic member having a non-linear spring characteristic.Type: GrantFiled: June 2, 1989Date of Patent: October 1, 1991Assignee: Emerson Electric CompanyInventors: J. P. Houben, A. J. Moolenaar
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Patent number: 4726430Abstract: A device for driving a drilling and/or impacting tool including a shaft journalled in a housing so as to be rotatable, if necessary. One end of the shaft is connectable with the tool whereas the other end is accessible for an oscillatory impact body movable in the housing by a guide, a rotatable driving shaft setting and a transmission. The transmission includes a device for converting the rotary movement of the driving shaft into an oscillatory movement of a driving element which is connected through an elastic member with the impact body.Type: GrantFiled: November 21, 1984Date of Patent: February 23, 1988Assignee: Skil CorporationInventors: Wilhelmus J. M. Hendrikx, Antonie J. Moolenaar, Jan P. Houben
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Patent number: 4595851Abstract: A commutator motor specifically designed for incorporation into portable machine tools such as a hand drill includes a stator winding arranged in a machine housing, and a rotor winding including a rotor shaft with a commutator ring journalled in the housing. Electrical connection between the commutator and current supply is ensured by multiple pairs of diametrically opposed carbon brushes of opposite polarity, the brushes being supported in the machine housing such that each respective pair of brushes can be separately brought into contact with the commutator by a lever capable of engaging the respective pairs of brushes. Various holder configurations support the brushes.Type: GrantFiled: October 26, 1984Date of Patent: June 17, 1986Assignee: Skil Nederland B.V.Inventors: Jan P. Houben, Antonie J. Moolenaar
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Patent number: 4584797Abstract: A portable belt sander includes a housing, a driving roller journalled therein, a motor with a transmission arranged in the housing for driving the roller, a control-roller journalled in a subframe movable relative to the housing and an endless sanding belt passed around the two rollers. The driving roller has a running surface whose width is materially smaller than that of the sanding belt.Type: GrantFiled: April 26, 1984Date of Patent: April 29, 1986Assignee: Skil Nederland B.V.Inventors: Peter Wanninkhof, Antonie J. Moolenaar
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Patent number: 4539500Abstract: A commutator motor specifically designed for incorporation into portable machine tools such as a hand drill includes a stator winding in a machine housing, and a rotor winding including a rotor shaft with a commutator ring journalled in the housing. Electrical connection between the commutator and current supply is ensured by multiple pairs of diametrically opposed carbon brushes of opposite polarity, the brushes being supported in the machine housing such that each respective pair of brushes can be separately brought into contact with the commutator by a setting means capable of engaging the respective pairs of brushes. Various holder configurations for supporting the brushes include sliding cams.Type: GrantFiled: February 18, 1983Date of Patent: September 3, 1985Assignee: Skil Nederland B.V.Inventors: Jan P. Houben, Antonie J. Moolenaar
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Patent number: 4177609Abstract: An apparatus such as a belt sander including spaced apart rolls and adjustable mounting means for supporting at least one roll. An endless belt is positioned around the rolls and drive means are provided for the rolls and belt. Alignment means including a belt edge engaging means are operatively connected to the roll mounting means, and a resilient force is applied to hold the engaging means against a belt edge as the belt is moved by the drive means. This causes the engaging means to follow variations in the belt edge position, and this movement is transmitted to the mounting means whereby the variations are compensated.Type: GrantFiled: July 12, 1978Date of Patent: December 11, 1979Assignee: Skil CorporationInventors: Stephanus J. Rameckers, Peter Wanninkhop, Antonie J. Moolenaar
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Patent number: RE33733Abstract: A device for driving a drilling and/or impacting tool including a shaft journalled in a housing so as to be rotatable, if necessary. One end of the shaft is connectable with the tool whereas the other end is accessible for an oscillatory impact body movable in the housing by a guide, a rotatable driving shaft setting and a transmission. The transmission includes a device for converting the rotary movement of the driving shaft into an oscillatory movement of a driving element which is connected through an elastic member with the impact body.Type: GrantFiled: December 22, 1988Date of Patent: November 5, 1991Inventors: Wilhelmus J. M. Hendrikx, Antonie J. Moolenaar, Jan P. Houben
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Patent number: RE35372Abstract: This invention relates to a device for driving a drilling or precussion tool having a spindle that rotates with respect to a housing. One end of the spindle is adapted to fasten to a tool piece and the other end is connected to an oscillating percussion body movable in the housing by means of a guideway. A drive shaft rotates the tool spindle into rotation or actuates the percussion body via a transmission that is provided with means for converting the rotary motion of the drive shaft into an oscillatory motion of a drive member. The drive member is connected to the precussion body through an elastic member having a non-linear spring characteristic.Type: GrantFiled: June 5, 1995Date of Patent: November 5, 1996Assignee: S-B Power Tool CompanyInventors: Jan P. Houben, Antonie J. Moolenaar