Patents Assigned to Ryobi Motor Products Corp.
  • Patent number: 5757154
    Abstract: A motor braking circuit arrangement, for use with a series/universal motor and a power supply for supplying power to the motor, including two separately actuable switches electrically interconnecting a separate braking winding with the motor to effect braking when either of the two switches are deactuated. The circuit arrangement includes a field winding wound about the motor stator and electrically connected in series with the motor armature winding. The separate brake winding is wound about the stator. The two switches are series-connected, and each switch is capable of assuming a first position associated with normal motor operation and a second position associated with motor braking wherein the separate brake winding is electrically connected in parallel with the motor armature. The switches may be single-pole, double-pole or combinations thereof.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: May 26, 1998
    Assignee: Ryobi Motor Products Corp.
    Inventor: David George Peot
  • Patent number: 5624302
    Abstract: An oscillating spindle sander having a spindle rotatably mounted in a cabinet. An external end of the spindle is adapted to receive a sanding drum. An upper cam pulley is fixedly attached to the spindle and a lower cam pulley is rotatably attached to the spindle within the cabinet. The upper and lower cam pulleys have face-to-face annular cam surfaces having complementary sinusoidal contours with diametrically opposite lobes and diametrically opposite valleys. The upper and lower cam pulleys have a toothed rim connected by individual drive belts to a common drive pulley rotated by an electric motor. The number of teeth on the toothed rims of the upper and lower cam pulleys are different, causing the upper and lower cam pulleys to rotate relative to each other. The annular cam surfaces cause the upper cam pulley and the spindle to be oscillated in a vertical direction in response to the relative rotation between upper and lower cam pulleys.
    Type: Grant
    Filed: December 30, 1994
    Date of Patent: April 29, 1997
    Assignee: Ryobi Motor Products Corp.
    Inventors: Toshimitsu Hashii, Robert G. Everts
  • Patent number: 5524512
    Abstract: A power hand tool for driving a fastener a desired depth into a workpiece. The power tool includes a depth adjust sleeve for varying a resulting driving depth of the fastener into the workpiece. A depth indicator is included to allow a user to gauge the resulting driving depth of the fastener into the workpiece based on his adjustment of the depth adjust sleeve. In one embodiment, the depth indicator comprises a marker coupled to the depth adjust sleeve such that its location varies monotonically in response to varying the resulting driving depth, a lens to allow the marker to be clearly seen by the user, and a scale to which the location of the marker is compared. A driving mechanism is then used for driving the fastener into the workpiece until the resulting driving depth is attained.
    Type: Grant
    Filed: March 11, 1994
    Date of Patent: June 11, 1996
    Assignee: Ryobi Motor Products Corp.
    Inventor: Jack Wolfe
  • Patent number: 5477587
    Abstract: A vacuum power head is provided which has a bare floor feature. A vacuum cleaner head assembly defines a vacuum chamber which contains a power driven rotary brush. Located outside of the vacuum chamber adjacent the rotary brush is a generally U-shaped trailing brush. The trailing brush cooperates with a height adjustment mechanism which is movable between a deep carpet position and a bare floor position. As the height adjustment mechanism of the head assembly is moved toward the bare floor position, the trailing brush is automatically moved to an extended position into engagement with the floor. When the height adjustment mechanism is moved from the bare floor position, a biasing means biases the trailing brush toward a retracted position within the head assembly. An actuator cooperates with the height adjustment mechanism to automatically move the trailing brush between the retracted position and the extended position in response to movement of the height adjustment mechanism.
    Type: Grant
    Filed: December 30, 1993
    Date of Patent: December 26, 1995
    Assignee: Ryobi Motor Products Corp.
    Inventors: William K. Glenn, III, Donald W. Carnes, James F. Barnes, Jr.
  • Patent number: 5470272
    Abstract: A removable working tool assembly that can be used with a power driven tool having a drive shaft. The removable working tool assembly includes a drive member which can operably connected to the drive shaft and a support member having a tool surface. One of the drive and support members defines a male connection mechanism while the other one of the members defines a female connection mechanism such that the members can be simply connected and disconnected without the need for tools or any other fastener elements. This allows various support members to be easily changed to facilitate the use of different tool surfaces such as sanders, grinders, scrapers or the like.
    Type: Grant
    Filed: February 3, 1994
    Date of Patent: November 28, 1995
    Assignee: Ryobi Motor Products Corp.
    Inventors: Naoki Kikuchi, Nobuto Kai
  • Patent number: 5428258
    Abstract: An armature for an electric motor having a laminated core assembly attached to the motor's shaft. The laminated core having a plurality of coil slots in which the armature coils are wound. A slot liner is disposed in each of the coil slots and an insulating disc is swagged onto the shaft which engages the ends of the slot liners preventing their longitudinal displacement during the winding of the armature coils.
    Type: Grant
    Filed: June 25, 1993
    Date of Patent: June 27, 1995
    Assignee: Ryobi Motor Products Corp.
    Inventor: John Mowery
  • Patent number: 5428197
    Abstract: An actuator switch (25) for an electrical power tool (10), having a housing (16) and an electric motor supported by the housing (16) for operatively driving a work implement, is provided. The actuator switch (25) includes a trigger (22) which cooperates with the housing (16) and is shiftably operable by the user between "on" and "off" positions. A power switch assembly (26) is oriented within the tool housing (16) adjacent the trigger (22) for actuation thereby. The power switch assembly includes a body (28) defining an internal cavity (30) with an aperture (32) extending therethrough. An electrical switch (34) is located within the switch assembly (26) and is electrically connected to the electric motor. A plunger (42) extends through the body aperture (32) to enable the trigger (22) to activate the electrical switch (34). An elastomeric pad (44) is operatively positioned between the plunger (42) and the trigger (22).
    Type: Grant
    Filed: June 1, 1993
    Date of Patent: June 27, 1995
    Assignee: Ryobi Motor Products Corp.
    Inventors: Ronald C. McCurry, Robert E. McCracken, James A. Keith, Jr.
  • Patent number: 5419737
    Abstract: A palm grip random orbital sanding machine having a housing and an electric motor disposed in the housing which drives an attached platen along a random orbital path. An exhaust fan disposed in an exhaust chamber produces an air flow from the vicinity of the platen out through an exhaust port. The housing has a pair of longitudinal slots provided on opposite sides thereof which removably receive the legs or side members of a U-shaped debris container. Each side member of the debris container has an entrance port coincident with the exhaust port of the exhaust chamber, and means for filtering the debris from the air flow exiting the side members. The commutator and brushes of the electric motor are disposed intermediate the longitudinal slots and the brushes are disposed parallel to the longitudinal axis of the sanding machine.
    Type: Grant
    Filed: October 28, 1993
    Date of Patent: May 30, 1995
    Assignee: Ryobi Motor Products Corp.
    Inventors: Kenneth M. Brazell, Robert G. Everts, Naoki Kikuchi
  • Patent number: 5414793
    Abstract: A speed control mechanism allowing a user to control the operating speed of a power tool. The speed control mechanism includes a drive motor and a handle connected to the power tool including a trigger, a speed governor and a cam assembly. The trigger is displaced from a first position by the user to initiate operation of the drive motor. The trigger cooperates with the speed governor to vary the operating speed of the drive motor based on the displacement of the trigger. The cam control assembly is operated by the user and cooperates with the trigger to control the extent to which the trigger can be displaced from the first position by the user, thereby limiting the operating speed of the motor. In one embodiment, the speed control mechanism is for use with the drive motor of the power tool to control the operating speed of the power tool. In an alternative embodiment, the speed control mechanism is used with a radial arm saw including an anti-kick forward device.
    Type: Grant
    Filed: April 27, 1993
    Date of Patent: May 9, 1995
    Assignee: Ryobi Motor Products Corp.
    Inventor: Hiroshi Morikawa
  • Patent number: 5410866
    Abstract: A rotary mulching lawn mower is provided having an annular housing forming a toroidal internal cutting chamber in which is oriented a blade having a central axis for rotation. The blade has a series of blade portions extending radially outward from the central axis each having an end portion extending into the toroidal internal cutting chamber. The blade end portion directs cut grass upward into the cutting chamber. Each blade has an intermediate portion located between the central axis and the end portion having a substantially flat surface lying in a plane generally perpendicular to the axis of rotation. The intermediate portion is provided with a radially extending rib located intermediate the leading and trailing edge portions of the blade having a slope 12 projecting downwardly out of the plane for directing cut grass into the lawn upon rotation of the blade. The lawn mower of the preferred embodiment is driven by a battery powered electric motor.
    Type: Grant
    Filed: March 29, 1994
    Date of Patent: May 2, 1995
    Assignee: Ryobi Motor Products Corp.
    Inventor: Charles K. Long
  • Patent number: 5381595
    Abstract: An adjustable fence for orienting a plate joiner having a body and a rotating generally planar cutter to cut an arcuate slot in a workpiece is disclosed. The fence comprises a base, a handle and fastening means. The base is shiftably affixed to the plate joiner body and has a planar surface forming a first fence oriented generally perpendicular to the plane of the cutter. The base also has a guideway parallel to the first fence. The handle is movably adjustably affixed to the base and has a grip portion adapted to cooperate with a hand of an operator and a planar surface forming a second fence forming an angle relative to the first fence. The handle cooperates with the base guideway enabling the second fence to be adjusted along a guideway axis parallel to the first fence relative to the planar cutter. The handle is pivotal about a transverse axis parallel to the first and second fences to vary the angle of the second fence relative to the first fence.
    Type: Grant
    Filed: September 3, 1993
    Date of Patent: January 17, 1995
    Assignee: Ryobi Motor Products, Corp
    Inventors: James A. Keith, Jr., William S. Bellew, James R. Sistare, Sr.
  • Patent number: 5346342
    Abstract: A shaft lock arrangement having a shaft lock slidably mounted in the housing of a power tool. The shaft lock has a keyhole-shaped aperture having a circular portion circumscribing the output shaft of the power tool when the shaft lock is in a RUN position and a rectangular portion, the sides of which straddle flat portions of the output shaft preventing the output shaft from rotating when the shaft lock is in the LOCKED position. The shaft lock further has a run detent resiliently engaged by a toggle of a cut-out switch to hold the shaft lock in the RUN position and a lock detent resiliently engaged by the toggle of the cut-out switch to hold the shaft lock in the LOCKED position. The cut-out switch prevents electrical power from applied to the motor of the power tool when the shaft of the power tool is locked by the shaft lock.
    Type: Grant
    Filed: March 19, 1993
    Date of Patent: September 13, 1994
    Assignee: Ryobi Motor Products Corp.
    Inventor: Charles D. Winchester
  • Patent number: D349292
    Type: Grant
    Filed: April 5, 1993
    Date of Patent: August 2, 1994
    Assignee: Ryobi Motor Products Corp.
    Inventor: Daniel A. Chunn
  • Patent number: D349637
    Type: Grant
    Filed: April 5, 1993
    Date of Patent: August 16, 1994
    Assignee: Ryobi Motor Products Corp.
    Inventors: Kiyoshi Hoshino, Ronald C. McCurry, Robert McCracken
  • Patent number: D350468
    Type: Grant
    Filed: March 26, 1993
    Date of Patent: September 13, 1994
    Assignee: Ryobi Motor Products Corp.
    Inventors: Daniel A. Chunn, James A. Keith, Jr.
  • Patent number: D352437
    Type: Grant
    Filed: March 23, 1993
    Date of Patent: November 15, 1994
    Assignee: Ryobi Motor Products Corp.
    Inventors: Daniel A. Chunn, Hiroshi Morikawa
  • Patent number: D355105
    Type: Grant
    Filed: April 20, 1993
    Date of Patent: February 7, 1995
    Assignee: Ryobi Motor Products Corp.
    Inventor: John E. Nemazi
  • Patent number: D356581
    Type: Grant
    Filed: October 20, 1993
    Date of Patent: March 21, 1995
    Assignee: Ryobi Motor Products, Corp.
    Inventors: Danel A. Chunn, James B. Watson, William J. Saunders
  • Patent number: D370162
    Type: Grant
    Filed: December 17, 1993
    Date of Patent: May 28, 1996
    Assignee: Ryobi Motor Products Corp.
    Inventors: Kenneth M. Brazell, Anthony M. Sorrells
  • Patent number: D374017
    Type: Grant
    Filed: March 4, 1994
    Date of Patent: September 24, 1996
    Assignee: Ryobi Motor Products, Corp
    Inventors: Daniel A. Chunn, James B. Watson, William J. Saunders