Loader

Details Loader Loader

2007-09-06

2010-12-07

Underwood, Donald (Department: 3652)

Material or article handling

Vertically swinging load support

Shovel or fork type

C060S459000

Reexamination Certificate

active

07845896

ABSTRACT:
A loader includes a hydraulically operated extension arm, a load sensor for monitoring the load condition on the loader and a hydraulic arrangement for actuation of the extension arm and/or an implement attached to the extension arm. The hydraulic arrangement exhibits at least one hydraulic cylinder with one supply line on the piston rod side and one supply line on the piston side. At least one mechanically switchable control device is coupled between a source of fluid pressure and a hydraulic tank, on the one hand, and the supply lines on the other hand. An electronic control unit is connected for effecting operation of a restricting device coupled between the supply lines in response to a load signal received from the load sensor so as to achieve a slowed-down actuation of the hydraulic cylinder in conjunction with the on set of a critical load condition. Thus, a restriction of a volumetric flow is achieved in at least one of the supply line on the piston rod side or the supply line on the piston side of the hydraulic cylinder.

REFERENCES:
patent: 4042135 (1977-08-01), Pugh et al.
patent: 2006/0090460 (2006-05-01), Ma et al.
patent: 2008/0302099 (2008-12-01), Vigholm et al.
patent: 19853523 (2000-03-01), None
patent: 0580007 (1994-01-01), None
patent: 1496009 (2005-01-01), None
patent: 1612184 (2006-01-01), None
patent: 1762535 (2007-03-01), None
patent: WO 2004/007339 (2004-01-01), None
European Search Report, May 14, 2009, 7 Pages.

Affiliated with

Also associated with

Rating

Loader does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Loader, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Loader will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4195487