Maurice E Griffin

US Patent:

20130149150, Jun 13, 2013

Filed:

Dec 9, 2011

Appl. No.:

13/316061

Inventors:

Mark Wiinikka - Hurst TX, US
Maurice Griffin - Euless TX, US
Charles Speller - Flower Mound TX, US

Assignee:

Bell Helicopter Textron Inc. - Fort Worth TX

International Classification:

B64C 27/605

US Classification:

416114

Abstract:

According to one embodiment, a rotor system, comprise a mating element, a sleeve, a first swashplate ring, a locking element, and a second swashplate ring. The mating element having a first plurality of grooves a first plurality of ridges. The sleeve is positioned inside the mating element such that the sleeve prevents rotation of the mating element about the sleeve while allowing the mating element to translate along the sleeve. The sleeve has a second plurality of grooves mating with the first plurality of ridges and a second plurality of ridges mating with the first plurality of grooves. The first swashplate ring is positioned around the mating element, and the locking element prevents. the first swashplate ring from rotating about the sleeve. The second swashplate ring is rotatable about the sleeve.

US Patent:

20130161884, Jun 27, 2013

Filed:

Dec 26, 2011

Appl. No.:

13/337222

Inventors:

Maurice D. Griffin - Euless TX, US
Scott Hemmen - Hurst TX, US
Matt Ledbetter - Arlington TX, US

Assignee:

BELL HELICOPTER TEXTRON INC. - FORT WORTH TX

International Classification:

F16F 13/08

US Classification:

26714013

Abstract:

A vibration isolator includes an upper housing and a lower housing; an upper reservoir housing defining a upper fluid chamber; a lower reservoir housing defining a lower fluid chamber; a piston spindle resiliently coupled to the upper housing with an upper elastomer member, the piston spindle being resiliently coupled to the lower housing with a lower elastomer member; an inertia track having a tuning passage, the inertia track being removably coupled to the piston spindle; and a tuning fluid disposed within the upper fluid chamber, the lower fluid chamber, and the tuning passage. The vibration isolator cancels vibratory forces at an isolation frequency, the isolation frequency being at least partially dependent upon a size of the tuning passage.

US Patent:

20130175389, Jul 11, 2013

Filed:

Jan 10, 2012

Appl. No.:

13/347237

Inventors:

Maurice D. Griffin - Euless TX, US

Assignee:

BELL HELICOPTER TEXTRON INC. - Fort Worth TX

International Classification:

B64D 27/00
F16F 13/08

US Classification:

244 54, 26714013

Abstract:

A vibration isolator includes an upper housing and a lower housing; an upper reservoir housing defining a upper fluid chamber; a lower reservoir housing defining a lower fluid chamber; a piston spindle resiliently coupled to the upper housing with an upper elastomer member, the piston spindle being resiliently coupled to the lower housing with a lower elastomer member; an elongated portion having a tuning passage; and a tuning fluid disposed there within. The vibration isolator cancels vibratory forces at an isolation frequency. The vibration isolator is utilized in a pylon system for mounting a transmission in an aircraft. The vibration isolator is located between a pylon structure and a roof structure. The isolator includes a spherical bearing assembly that is located near a waterline location of a rotational axis of a drive shaft.

US Patent:

20130270415, Oct 17, 2013

Filed:

Jan 8, 2013

Appl. No.:

13/736687

Inventors:

BELL HELICOPTER TEXTRON INC. - , US
Matthew W. Hendricks - Bedford TX, US
Maurice Griffin - Euless TX, US
Michael R. Smith - Colleyville TX, US

Assignee:

BELL HELICOPTER TEXTRON INC. - FORT WORTH TX

International Classification:

F16F 7/00

US Classification:

248638

Abstract:

The vibration suppression system includes a vibration isolator located in each corner in a four corner pylon mount structural assembly. The combination of four vibration isolators, two being forward of the transmission, and two being aft of the transmission, collectively are effective at isolating main rotor vertical shear, pitch moment, as well as roll moment induced vibrations. Each opposing pair of vibration isolators can efficiently react against the moment oscillations because the moment can be decomposed into two antagonistic vertical oscillations at each vibration isolator. A pylon structure extends between a pair of vibration isolators thereby allowing the vibration isolators to be spaced a away from a vibrating body to provide increased control.

US Patent:

20140064922, Mar 6, 2014

Filed:

Aug 23, 2012

Appl. No.:

13/593113

Inventors:

Michael R. Smith - Colleyville TX, US
Frank B. Stamps - Colleyville TX, US
Maurice D. Griffin - Euless TX, US

Assignee:

Bell Helicopter Textron Inc. - Fort Worth TX

International Classification:

F01D 25/06

US Classification:

415118, 415119, 2988921

Abstract:

In accordance with one embodiment of the present disclosure, a system includes a first housing, a second housing, a seal, and a spring system. The first housing includes a first volume of fluid. The first housing is capable of connecting to a first element and to a second element, and is also capable of reducing an amount of movement transferred from the first element to the second element. The second housing is connected to the first housing. The second housing includes a second volume of fluid and a volume of gas. The first volume of fluid is in fluid communication with the second volume of fluid. The seal is capable of separating the second volume of fluid from the volume of gas. The spring system is capable of applying pressure to the first volume of fluid and the second volume of fluid.

US Patent:

20190300162, Oct 3, 2019

Filed:

Mar 30, 2018

Appl. No.:

15/942030

Inventors:

- Fort Worth TX, US
Maurice Griffin - Euless TX, US

International Classification:

B64C 27/00
F16F 13/24

Abstract:

A mounting system for a vibration isolation device comprises a support structure having an opening disposed therein, the opening having a concave recess; a thin elastomeric component attached to a surface of the concave recess; and a spherical elastomeric bearing disposed in the opening and attached to the thin elastomeric component, the spherical elastomeric bearing having a beveled upper portion, a middle portion and a beveled lower portion configured to engage the vibration isolation devices.

US Patent:

20190113098, Apr 18, 2019

Filed:

Oct 16, 2017

Appl. No.:

15/785114

Inventors:

- Fort Worth TX, US
Frank Bradley Stamps - Colleyville TX, US
Craig Turner - Lewisville TX, US
Maurice Griffin - Euless TX, US

Assignee:

Bell Helicopter Textron Inc. - Fort Worth TX

International Classification:

F16F 13/10
F16F 9/06
F16F 13/18
F16F 13/24

Abstract:

A vibration attenuating fluid mount with a partitioned compensator includes an inner member, an outer member, a flexible member having a castellated transition between a fluid passageway and at least one operating chamber. A membrane may be disposed in a volume compensator in fluid communication with one or more operating chambers. The inner member and outer member may be connected via a castellated connection, a swaged lock ring, or a split-lock ring.

US Patent:

20180038439, Feb 8, 2018

Filed:

Oct 3, 2017

Appl. No.:

15/723510

Inventors:

- Fort Worth TX, US
Matthew W. Hendricks - Bedford TX, US
Maurice Griffin - Euless TX, US
Michael R. Smith - Colleyville TX, US

Assignee:

BELL HELICOPTER TEXTRON INC. - Fort Worth TX

International Classification:

F16F 7/00
B64C 27/00
F16F 13/24

Abstract:

The vibration suppression system includes a vibration isolator located in each corner in a four corner pylon mount structural assembly. The combination of four vibration isolators, two being forward of the transmission, and two being aft of the transmission, collectively are effective at isolating main rotor vertical shear, pitch moment, as well as roll moment induced vibrations. Each opposing pair of vibration isolators can efficiently react against the moment oscillations because the moment can be decomposed into two antagonistic vertical oscillations at each vibration isolator. A pylon structure extends between a pair of vibration isolators thereby allowing the vibration isolators to be spaced a away from a vibrating body to provide increased control.