US 8,783,126 B2Granted

Manual transmission with a gearshift locking mechanism and method

AssigneeMack Trucks, Inc.

InventorsVictor Kronstadt, Earl E. Duffey

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Abstract

A manual transmission with a gearshift locking arrangement includes a rail having a shifter having a slot between forward and rear ears of the shifter, the rail being movable between rail forward and rear positions. The manual transmission with a gearshift locking arrangement also includes forward and rear engagement members disposed at positions corresponding to the rail forward and rear positions. A shift lever is also provided, an engaging portion of the shift lever being adapted to be disposed in the slot, the shift lever being adapted to move the rail between the rail forward and rear position, the engaging portion being engageable with the forward engagement member when the rail is in the rail forward position and the engaging portion being engageable with the rear engagement member when the rail is in the rail rear position.

Claims16

Dependent claims

A manual transmission with a gearshift locking arrangement, comprising:

a first rail having a first shifter having a first slot between first forward and rear ears of the first shifter, first forward and rear engagement members in the form of one of protrusions and protrusion receiving recesses being provided on the first forward and rear ears of the first shifter;
a second rail having a second shifter having only a single slot consisting of a second slot between second forward and rear ears of the second shifter;
and
a shift lever, an engaging portion of the shift lever being movable between the first slot and the second slot, the shift lever being adapted to move the second rail between a second rail forward and rear position when the engaging portion is in the second slot, the engaging portion comprising at least one of a protrusion receiving recess and a protrusion for engaging with the first forward engagement member when the second rail is in the second rail forward position and with the first rear engagement member when the second rail is in the second rail rear position;
and
at least one of a compressed resilient member, hydraulic pressure, pneumatic pressure, and an electromagnet provided to urge the engaging portion into engagement with either of the first forward or rear engagement members.

3 more elements

A method of operating a gearshift mechanism, comprising:

moving an engaging portion of a shift lever between a first slot in a first shifter of a first rail, the first slot being disposed between first forward and rear ears of the first shifter, and a second slot in a second shifter of a second rail, the second slot being disposed between second forward and rear ears of the second shifter and the second shifter having only a single slot consisting of the second slot, the engaging portion comprising at least one of a protrusion receiving recess and a protrusion;
using the shift lever, moving the second rail one of forwardly and rearwardly relative to the first rail;
and
when the second rail is moved forwardly, engaging with the engaging portion a first forward engagement member provided on the first forward ear of the first shifter and, when the second rail is moved rearwardly, engaging with the engaging portion a first rear engagement member provided on the first rear ear of the first shifter the forward engagement member, the rear engagement member being in the form of one of protrusions and protrusion receiving recesses for engaging with the engaging portion, by urging the engaging portion into engagement with either of the first forward or rear engagement members with at least one of a compressed resilient member, hydraulic pressure, pneumatic pressure, and an electromagnet.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 12/375,937Filed 1 Sep 2006
Published: US 2010/0000360 A17 Jan 2010
Granted: 22 Jul 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

F16H 63/36
Locking or disabling mechanisms: interlocking devices
F16H 59/04
Selector apparatus: ratio selector apparatus
F16H 63/10
Multiple final output mechanisms being moved by a single common final actuating mechanism: the final actuating mechanism having a series of…
Y10T 74/20024
Transmission control: fluid actuator

Family

US 2010/0000360 A1Pre-grant publication · published 7 Jan 2010
US 8,783,126 B2This patent

From the US filing history. Foreign family members aren’t listed.

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