Working machine

Details Working machine Working machine

2011-06-21

2011-06-21

Dickson, Paul N (Department: 3616)

Land vehicles

Suspension modification enacted during travel

Suspension stiffness for ride comfort

C414S685000

Reexamination Certificate

active

07963528

ABSTRACT:
A working machine includes a body and an axle which is mounted so as to be moveable relative to the body, the axle carrying at or towards each end, a ground engaging wheel by means of which the machine can travel over the ground, the machine including a speed sensor sensitive to the machine ground speed, and there being a hydraulic control system including at least one control actuator connected between the body and the axle for controlling movement of the axle relative to the body, and the hydraulic system further including at least one control valve which is operable to restrict fluid flow occurring as a result of the control actuator extending or retracting in response to axle movements relative to the body, depending upon the signal provided by the speed sensor, wherein the control valve is an electrically operated control valve, operated proportionally by a valve controller which responds to changes in machine speed, by adjusting the restriction to fluid flow so as to permit more fluid flow as the machine speed increases.

REFERENCES:
patent: 4264014 (1981-04-01), Hogg et al.
patent: 5013061 (1991-05-01), Fujimura et al.
patent: 5104143 (1992-04-01), Yonekawa
patent: 5116077 (1992-05-01), Karnopp et al.
patent: 5388857 (1995-02-01), Wernimont et al.
patent: 6144907 (2000-11-01), Shibuya et al.
patent: 6802687 (2004-10-01), Litchfield et al.
patent: 7383906 (2008-06-01), Sewell
patent: 2002/0001516 (2002-01-01), Cook et al.
patent: 2004/0120800 (2004-06-01), Litchfield et al.
patent: 2007/0059146 (2007-03-01), Bitter
patent: 0 885 756 (2002-08-01), None
patent: 0 893 290 (2002-12-01), None
patent: 0 919 407 (2004-01-01), None
patent: 1 437 324 (2004-07-01), None
patent: 2 821 295 (2003-09-01), None
patent: 1 238 243 (1971-07-01), None
patent: 1 470 500 (1977-04-01), None
UK Search Report for GB0813048.6, dated Oct. 27, 2008.
Search Report for EP 08 16 0565, dated Apr. 15, 2010.

Affiliated with

Also associated with

Rating

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

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2619748