Land vehicles – Wheeled – Running gear
Patent
1997-09-19
1998-11-10
Ellis, Christopher P.
Land vehicles
Wheeled
Running gear
2804051, 2804071, B62D 3308
Patent
active
058332537
ABSTRACT:
A movable subframe for tractor-trailers, commonly referred to as a slider, includes an improved retractable pin mechanism for locking the movable subframe in a selected position relative to the tractor-trailer body. A manually operated handle is used to pneumatically actuate the pin mechanism, or in the event that the mechanism is unable to be pneumatically actuated, to manually actuate the pin mechanism. Conversion between the pneumatic and manual actuation modes is accomplished without modification to the retractable pin mechanism. More specifically, a handle assembly, which in the pneumatic mode operates generally independent of the other parts of the pin mechanism, is manually moved from a starting position in which the pins are in an extended locked position, to a first position to engage a button valve thereby opening the valve to supply air to an air chamber, which in turn causes pneumatic actuation and retraction of the pin mechanism. Alternatively, the handle assembly can be moved directly from the starting position to a second position, bypassing the first position and the pneumatic mode, whereby the handle assembly operates integrally with the other parts of the pin mechanism, which in turn causes manual actuation and retraction of the pin mechanism.
REFERENCES:
patent: 4286797 (1981-09-01), McKosh, Jr. et al.
patent: 4641846 (1987-02-01), Ehrhart
patent: 5199732 (1993-04-01), Lands et al.
patent: 5449190 (1995-09-01), Ford
patent: 5451069 (1995-09-01), Schueman
patent: 5564725 (1996-10-01), Brazeal
patent: 5720489 (1998-02-01), Pierce et al.
Dureska David P.
Ellis Christopher P.
The Boler Company
LandOfFree
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