Synchronized granular material and liquid spreading device with full hydraulic control

• US 5,069,392 A
• Filed: 08/15/1990
• Issued: 12/03/1991
• Est. Priority Date: 07/03/1990
• Status: Expired due to Term

• Current Assignee: Bristol Company Limited Partnership (Emerson Electric Company)
• Original Assignee: Bristol Company Limited Partnership (Emerson Electric Company)
• Inventors: Doherty, John A., Wise, James J.
• Primary Examiner(s): Kashnikow, Andres
• Assistant Examiner(s): YOUNG, KAREN MERRITT
• Application Number:
  US07/568,497
• Time in Patent Office: 475 Days
• Field of Search: 239/61, 239/62, 239/662, 239/663, 239/670, 239/672, 239/675, 239/677, 239/684, 239/127, 239/71, 239/74, 180/53.4, 414/518, 414/526, 414/528
• US Class Current: 239/675
• CPC Class Codes: E01C 19/21 for simultaneously but separately applying liquid material and granular or pulverulent material, e.g. bitumen and grit, with or without spreading with rolling E01C19/4813; for filling grooves and gritting the filling
• CPC Class Codes: E01C 2019/208 with longitudinal auger
• CPC Class Codes: E01H 10/007 Mobile apparatus specially adapted for preparing or applying liquid or semi-liquid thawing material or spreading granular material on wintry roads

Abstract

A granular and liquid material spreading system mounted on a vehicle is disclosed. Granular material is moved from a hopper to delivery means by a hydraulic system. The hydraulic system for a granular material delivery system is selectively used by a liquid delivery system to operate a liquid pump to move the liquid material to the delivery position. The amount of liquid delivered is dependent upon the feed rate of the granular material delivery system. Variation of the liquid feed rate may be changed within a predetermined range. The level of liquid may be sensed to disengage the liquid delivery system. In one embodiment, the hydraulic system fluid is diverted to power the liquid delivery system, slowing the feed rate of the granular delivery system and the amount of granular material used. In another embodiment the hydraulic system is used to control the liquid feed rate.

Claims

1. A control for a synchronized granular and liquid spreader device mountable on a vehicle comprising in combination:

a granular delivery system mounted on said vehicle for distributing granular material from a hopper, said hopper depositing said granular material onto conveyor means driven by a hydraulic system, said conveyor means for moving the granular material to a pre-selected delivery position at which delivery position delivery means receive and distribute said granular material;

a liquid delivery system interconnected to said granular delivery system for a synchronous feed rate of the granular and liquid materials, said liquid delivery system for adding the liquid to the granular material generally at the delivery means;

a hydraulic flow control means for directing hydraulic fluid, including means for directing hydraulic fluid to the liquid delivery system or to the granular delivery system; and

a first hydraulic flow control valve for diverting a selected percentage of hydraulic fluid from the hydraulic system to the liquid delivery system and a second hydraulic flow control valve for supplying a selected percentage of hydraulic fluid to a motor of the liquid delivery system, whereby the first variable flow control valve slows the speed of the conveyor means and lowers the feed rate of the granular material and the second variable control valve sets the feed rate of the liquid.

2. The invention as defined in claim 1 wherein the direction control valve is downstream of the first variable flow control valve.

3. The invention as described in claim 1 further includes means for turning off the liquid delivery system when the liquid reaches a predetermined amount.

4. A control for a synchronized granular and liquid spreader device mountable on a vehicle comprising in combination:

a granular delivery system mounted on said vehicle for distributing granular material from a hopper, said hopper depositing said granular material onto conveyor means driven by a hydraulic system, said conveyor means for moving the granular material to a pre-selected delivery position at which delivery position delivery means receive and distribute said granular material; and

a hydraulic control means for diverting a selected percentage of hydraulic fluid from the hydraulic system of a granular delivery system to the liquid delivery system and thereby slowing the speed of said conveyor means and lowering the feed rate of the granular material and then further selectively diverting preselected amounts of that hydraulic fluid by a second selected percentage from the hydraulic system of the granular delivery system and thereby selecting the feed rate of the liquid material.