×

Weighing system

  • US 4,771,837 A
  • Filed: 05/14/1987
  • Issued: 09/20/1988
  • Est. Priority Date: 10/20/1986
  • Status: Expired due to Fees
First Claim
Patent Images

1. Weighing system for a refuse truck having a refuse receptacle which has a top opening and hydraulically actuated lifting means for engaging and lifting a refuse container which has a top opening from a resting position outside of the truck to an inverted position above the opening of the refuse receptacle to permit the contents of the refuse container to fall into the refuse receptacle, said lifting means also being effective to lower said refuse container to said resting position, said weighing system comprising:

  • (a) a fluid pressure transducer which is operatively connected to said hydraulically actuated lifting means of said refuse truck for sensing the weight of a refuse container when the container is lifted and lowered by the lifting means, said transducer being effective for generating an electrical analog signal which is proportional to the weight which is sensed by the transducer,(b) electrical digitizing means which is operatively connected to said transducer for converting said analog signal to a digital signal which is indicative of the weight which is sensed by the transducer,(c) a source of electrical power, and(d) electrical control means, including a normally open pressure actuated threshold switch which is operatively connected to said hydraulic system for connecting said transducer to said source of electrical power for energizing said transducer, said switch being operatively connected to said lifting means so that said switch is closed during the lifting of a full refuse container and during the lowering of an empty refuse container, said electrical control means being operatively connected to said electrical digitizing means for producing a first digital signal at a point during the lowering of an empty refuse container which is indicative of the weight of said empty refuse container.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×