Patents by Inventor David Bernard Drennen
David Bernard Drennen 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: 10605318Abstract: A ballscrew assembly may comprise a ballscrew having an axially distributed ballscrew groove about an interior circumference of the ballscrew, an extended top plate having an axially distributed extended top plate groove disposed on an outer circumference of the extended top plate, and an axially distributed thrust bearing. Further, a ballnut assembly may comprise a ballnut having an axially distributed ballnut groove about an interior circumference of the ballnut, an extended top plate having an axially distributed extended top plate groove disposed on an outer circumference of the extended top plate, and an axially distributed thrust bearing. Further still, a ballnut assembly may comprise a ballnut having an axially distributed ballnut groove about an outer circumference of the ballnut, an extended top plate having an axially distributed extended top plate groove disposed on an interior circumference of the extended top plate and an axially distributed thrust bearing.Type: GrantFiled: February 22, 2017Date of Patent: March 31, 2020Assignee: Goodrich CorporationInventors: David Bernard Drennen, Harald Klode
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Publication number: 20170198777Abstract: A ballscrew assembly may comprise a ballscrew having an axially distributed ballscrew groove about an interior circumference of the ballscrew, an extended top plate having an axially distributed extended top plate groove disposed on an outer circumference of the extended top plate, and an axially distributed thrust bearing. Further, a ballnut assembly may comprise a ballnut having an axially distributed ballnut groove about an interior circumference of the ballnut, an extended top plate having an axially distributed extended top plate groove disposed on an outer circumference of the extended top plate, and an axially distributed thrust bearing. Further still, a ballnut assembly may comprise a ballnut having an axially distributed ballnut groove about an outer circumference of the ballnut, an extended top plate having an axially distributed extended top plate groove disposed on an interior circumference of the extended top plate and an axially distributed thrust bearing.Type: ApplicationFiled: February 22, 2017Publication date: July 13, 2017Applicant: Goodrich CorporationInventors: David Bernard Drennen, Harold Klode
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Patent number: 9611923Abstract: A ballscrew assembly may comprise a ballscrew having an axially distributed ballscrew groove about an interior circumference of the ballscrew, an extended top plate having an axially distributed extended top plate groove disposed on an outer circumference of the extended top plate, and an axially distributed thrust bearing. Further, a ballnut assembly may comprise a ballnut having an axially distributed ballnut groove about an interior circumference of the ballnut, an extended top plate having an axially distributed extended top plate groove disposed on an outer circumference of the extended top plate, and an axially distributed thrust bearing. Further still, a ballnut assembly may comprise a ballnut having an axially distributed ballnut groove about an outer circumference of the ballnut, an extended top plate having an axially distributed extended top plate groove disposed on an interior circumference of the extended top plate and an axially distributed thrust bearing.Type: GrantFiled: February 26, 2013Date of Patent: April 4, 2017Assignee: Goodrich CorporationInventors: Harald Klode, David Bernard Drennen
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Publication number: 20150285346Abstract: Systems and methods disclosed herein may be useful for use in a ballscrew assembly. In this regard, a ballscrew assembly is provided comprising a ballscrew having a ballscrew stop, a ballnut having a ballnut stop, wherein contact between the ballnut stop and the ballscrew stop impede rotation of the ballscrew relative to the ballnut. The ballnut stop may comprise an axial mating surface and the ballscrew stop may comprise an axial mating surface. Additionally, the ballnut may comprise threads axially spaced a first distance apart and the ballnut stop comprises a surface having length equal to the first distance.Type: ApplicationFiled: June 11, 2015Publication date: October 8, 2015Applicant: Goodrich CorporationInventors: Eric D. Cahill, David Bernard Drennen, Harald Klode, Kevin Rehfus
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Patent number: 8402852Abstract: A ballscrew assembly may comprise a ballscrew having an axially distributed ballscrew groove about a circumference of the ballscrew, an extended top plate having an axially distributed extended top plate groove, and an axially distributed thrust bearing disposed in a space bounded by the axially distributed ballscrew groove and the axially distributed extended top plate groove.Type: GrantFiled: January 18, 2011Date of Patent: March 26, 2013Assignee: Goodrich CorporationInventors: Harald Klode, David Bernard Drennen
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Publication number: 20130068053Abstract: Systems and methods disclosed herein may be useful for use in a ballscrew assembly. In this regard, a ballscrew assembly is provided comprising a ballscrew having a ballscrew stop, a ballnut having a ballnut stop, wherein contact between the ballnut stop and the ballscrew stop impede rotation of the ballscrew relative to the ballnut. The ballnut stop may comprise an axial mating surface and the ballscrew stop may comprise an axial mating surface. Additionally, the ballnut may comprise threads axially spaced a first distance apart and the ballnut stop comprises a surface having length equal to the first distance.Type: ApplicationFiled: September 20, 2011Publication date: March 21, 2013Applicant: GOODRICH CORPORATIONInventors: Eric D. Cahill, David Bernard Drennen, Harald Klode, Kevin Rehfus
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Publication number: 20120180588Abstract: Improved ballscrew assemblies are disclosed herein. For example, a ballscrew assembly may comprise a ballscrew having an axially distributed ballscrew groove about a circumference of the ballscrew, an extended top plate having an axially distributed extended top plate groove, and an axially distributed thrust bearing disposed in a space bounded by the axially distributed ballscrew groove and the axially distributed extended top plate groove.Type: ApplicationFiled: January 18, 2011Publication date: July 19, 2012Applicant: GOODRICH CORPORATIONInventors: Harald Klode, David Bernard Drennen
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Patent number: 6626269Abstract: A disc brake caliper assembly has a housing with a bore. A piston in the bore is movable between applied, retracted and knock-back positions. The piston is activatable by hydraulic pressure to move from the retracted position to the applied position; and a retracting seal is effective in the absence of the hydraulic pressure to move the piston from the applied position to the retracted position. A linkage adjacent the piston carries a stop; and an actuator is responsive to an end of brake activation signal to cause the linkage to engage the stop with the piston when the piston is retracted from its applied position to its retracted position so as to prevent the piston from moving from the retracted position to the knock-back position. The actuator is preferably a comparatively weak electric motor that stalls as the stop engages the piston; and the stall is sensed to end motor activation. The end of brake activation signal is preferably provided by a brake position or pressure sensor.Type: GrantFiled: November 21, 2001Date of Patent: September 30, 2003Assignee: Delphi Technologies, Inc.Inventors: Schuyler Scott Shaw, Bryan Peter Riddiford, John Benjamin Hageman, Donald Edward Schenk, David Bernard Drennen
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Patent number: 6481543Abstract: A disc brake caliper assembly is provided that includes a housing having a bore. A piston is arranged within the bore and is movable between normal retracted and knock-back positions. A linkage is adjacent to the piston and is movable between first and second positions with a clearance between the piston and the linkage in the first position. The clearance undesirably permits the piston to move to the knock-back position during severe operating conditions. An actuator, which also may be used as part an electric parking brake, moves the linkage from the first position to the second position to eliminate the clearance when the linkage is moved from the first position to the second position where the linkage abuts the piston. The linkage is connected to the caliper housing by a support. The linkage prevents the piston from moving from the normal retracted position to the knock-back position.Type: GrantFiled: August 8, 2000Date of Patent: November 19, 2002Assignee: Delphi Technologies, Inc.Inventors: Schuyler Scott Shaw, Bryan Peter Riddiford, John Benjamin Hageman, Donald Edward Schenk, David Bernard Drennen
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Patent number: 6412610Abstract: The invention provides an electric brake caliper that includes a caliper housing have a rotor channel adapted to receive a rotor therein, where the rotor channel has a first axial surface adapted to seat an outer brake pad thereon. The brake caliper also includes a piston assembly mounted to the housing on an axial side of the rotor channel opposite that of the outer brake pad.Type: GrantFiled: August 9, 2000Date of Patent: July 2, 2002Assignee: Delphi Technologies, Inc.Inventors: David Bernard Drennen, Gary Chris Fulks, Robert John Disser
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Publication number: 20020063022Abstract: A disc brake caliper assembly has a housing with a bore. A piston in the bore is movable between applied, retracted and knock-back positions. The piston is activatable by hydraulic pressure to move from the retracted position to the applied position; and a retracting seal is effective in the absence of the hydraulic pressure to move the piston from the applied position to the retracted position. A linkage adjacent the piston carries a stop; and an actuator is responsive to an end of brake activation signal to cause the linkage to engage the stop with the piston when the piston is retracted from its applied position to its retracted position so as to prevent the piston from moving from the retracted position to the knock-back position. The actuator is preferably a comparatively weak electric motor that stalls as the stop engages the piston; and the stall is sensed to end motor activation. The end of brake activation signal is preferably provided by a brake position or pressure sensor.Type: ApplicationFiled: November 21, 2001Publication date: May 30, 2002Inventors: Schuyler Scott Shaw, Bryan Peter Riddiford, John Benjamin Hageman, Donald Edward Schenk, David Bernard Drennen
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Patent number: 6390247Abstract: A brake caliper. A motor rotates a ball screw which translates a ball nut and a first drive pin. Translation of the first drive pin rotates a first brake lever attached to an eccentric cam shaft having a cam portion. Rotation of the cam portion on the eccentric cam shaft translates a piston shaft assembly, a piston head attached to the piston shaft assembly, and a first brake pad attached to the piston head. The first brake lever is attachable to, and rotatable by, a manually-actuated parking brake cable. This allows operation of the parking brake to stop the vehicle in an emergency should the motor fail to operate from whatever cause including loss of power.Type: GrantFiled: October 11, 2000Date of Patent: May 21, 2002Assignee: Delphi Technologies, Inc.Inventor: David Bernard Drennen
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Patent number: 6139460Abstract: An electric caliper for a brake system includes a cylindrical housing having a bore, a bridge extending from the housing, and a pair of friction elements operatively disposed under the bridge. The electric caliper also includes a motor disposed within the bore and a planetary gear system disposed within the bore and operatively connected to the motor. The electric caliper further includes a ball screw disposed within the bore and positioned around the motor and operatively connected to the planetary gear system. The electric caliper includes a piston operatively connected to the ball screw. Displacement of the piston causes the friction elements to operatively engage a disc disposed between the friction elements.Type: GrantFiled: May 24, 1999Date of Patent: October 31, 2000Assignee: Delphi Technologies, Inc.Inventors: David Bernard Drennen, Brian Paul Heber
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Patent number: 6024422Abstract: A variable pitch screw-driven system includes a rotatable drive screw powered by a motor actuator. A cam sleeve includes a nut section and is disposed about the drive screw and is linearly translatable in response to rotation of the drive screw. The cam sleeve includes a cam track with a fixed cam follower positioned to travel within a cam track. Linear translation of the cam sleeve is altered by tracking of the cam follower within the cam track such that rotation of the cam sleeve is effected simultaneously with rotation of the drive screw resulting in an effective variable pitch of the variable pitch screw-driven system wherein linear translation of the cam sleeve results from both rotation of the drive screw and rotation of the cam sleeve.Type: GrantFiled: May 16, 1997Date of Patent: February 15, 2000Assignee: General Motors CorporationInventors: David Bernard Drennen, Gustavus Pearl Bock, Ryan Lovell Wright
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Patent number: 5667284Abstract: A manually backdrivable ball screw assisted braking system includes a ball drive operated by a reversible electric motor to effect linear translation of the piston resulting in selected pressurization of a wheel brake. The ball drive is assisted in operation by a manually backdrivable ball screw assembly operated by actuation of a hydraulic master cylinder by the manual application of force to the brake pedal.Type: GrantFiled: August 15, 1996Date of Patent: September 16, 1997Assignee: General Motors CorporationInventors: David Bernard Drennen, Ryan Lovell Wright
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Patent number: 5667283Abstract: A variable screw-driven system includes a rotatable drive screw powered by a motor actuator. A nut is disposed about the drive screw and is linearly translatable in response to rotation of the drive screw. The nut carries a cam follower which travels within a cam track. Linear translation of the nut is altered by tracking of the cam following within the cam track such that rotation of the nut is effected simultaneously with rotation of the drive screw resulting in an effective variable pitch of the variable screw-driven system wherein linear translation of the nut results from both rotation of the drive screw and rotation of the nut.Type: GrantFiled: April 15, 1996Date of Patent: September 16, 1997Assignee: General Motors CorporationInventors: David Bernard Drennen, Ryan Lovell Wright