Mobile crushing plant

• US 4,903,903 A
• Filed: 03/21/1989
• Issued: 02/27/1990
• Est. Priority Date: 11/03/1986
• Status: Expired due to Fees

• Current Assignee: Noell Service und Maschinentechnik GmbH
• Original Assignee: Salzgitter Maschinenbau GmbH
• Inventors: Benen, Gunther
• Primary Examiner(s): Gorski, Joseph M.
• Application Number:
  US07/326,468
• Time in Patent Office: 343 Days
• Field of Search: 241/101.7, 241/101.2, 241/285 R, 241/285 A, 241/285 B
• US Class Current: 241/101.76
• CPC Class Codes: B02C 21/02 Transportable disintegrating plant

Abstract

A mobile crushing plant has an elongated frame with a front end portion connectable to a towing vehicle and a rear end portion supporting a comminuting machine which receives material to be crushed from a feeding unit having an inlet above the front end portion of the frame. When the plant is in use, the front end portion is detached from the towing vehicle and a first set of jacks in front of a pair of normally ground-contacting wheels is lowered into contact with the ground. A second set of jacks behind the wheels is then extended to lift the rear end portion by pivoting the frame about the lower end of the first set of jacks so that the inlet of the feeding unit is moved nearer to the ground and the comminuting machine is lifted above and away from the ground. A portion of the feeding unit is substantially horizontal when the front end portion of the frame is attached to the vehicle or when the crushing plant is in use.

Claims

1. A mobile crushing plant, comprising a semitrailer including a frame having a front end and a rear end and including a set of ground-contacting wheels at said rear end, said frame having a first position in which said front end thereof is located at a first distance from the ground and is connectable to a towing vehicle, and a second position in which said front end is located at a second distance from the ground, said second distance being less than said first distance;

a crushing machine mounted on said frame at said rear end;

a feeding device mounted on said frame and including an inlet at said front end of said frame for material to be crushed and a conveyor for conveying the material to said crushing machine;

lifting means mounted on said frame at said rear end, which lifting means lift said rear end so that said frame pivots from said first position to said second position and thereby displaces said front end and said inlet of said feeding device towards the ground; and

support means mounted on said frame in front of said set of wheels and spaced apart from said crushing machine, said support means having a rest position clear of the ground and an operative position in contact with the ground, and said support means defining in said operative position a substantially horizontal axis which extends transverse to said frame and constitutes a pivot axis for pivoting of said frame from said first to said second position.

2. The crushing plant of claim 1, wherein said support means is extendable and retractible.

3. The crushing plant of claim 1, wherein said lifting means is located on said frame behind and near said set of wheels, said support means also being located near said set of wheels.

4. The crushing plant of claim 1, wherein said rear end of said frame has a portion which carries said crushing machine and said portion is inclined downward at an angle such that said portion is at least approximately horizontal in said second position of said frame.