Weighing device
OwnerArnold J. Daytoninventor
Life of this patent
Estimating the term…
Abstract
Combination hydraulic-pneumatic weighting scale which has a base in which is located multiple load cell units to effect displacement of a quantity of hydraulic fluid. A flexible conduit interconnects the load cells with the gauge. The gauge indicator is moved by an air actuated Bourdon tube and can be calibrated accurately for any specific weight up to 300 pounds. There is sufficient displacement of hydraulic fluid to compress a substantial column of air in the Bourdon tube and cause deflection of the needle. The amount of air compression within the scale gauge causes a sufficiently large deflection in the Bourdon tube to effect a large needle deflection and thus to obtain weight indications over the full range of the scale with great accuracy.
Claims17
A combination hydraulic-pneumatic weighing device comprising:
- a. a base member including a bottom wall and upstanding side walls defining an upwardly open scale housing,
- b. a plurality of hydraulic fluid-containing, load-receiving members supported in said base member, said load receiving members having a manifold housing including an upwardly open manifold cavity and a downwardly movable member disposed above said manifold cavity for limited vertical movement and also including a metallic bellows member sealingly secured to both said movable member and manifold housing and together with said manifold cavity defining a load cell cavity, said manifold housing including at least one fluid opening connected to said manifold cavity to be interconnected by fluid passage means with another load receiving member, said plurality of load-receiving members being filled with hydraulic liquid and interconnected for movement of said hydraulic liquid,
- c. a platform section mounted on said base member in such a way as to apply a weight thereon generally equally to said plurality of load-receiving members,
- d. conduit means interconnecting at least one of said load-receiving members and a weighing scale device and also being substantially completely filled with hydraulic liquid, said conduit and said plurality of load-receiving members being interconnected so as to cumulatively displace a predetermined amount of hydraulic liquid in response to a predetermined amount of weight being applied to said load receiving member, and,
- e. said weighing scale device including a weight indicator which is actuated by a column of air compressed by said displaced hydraulic liquid.
A combination hydraulic-pneumatic weighing device, comprising:
- a. a base member including a bottom wall and upstanding side walls defining an upwardly open scale housing,
- b. a plurality of hydraulic fluid-containing, load-receiving members supported in said base member, said load-receiving members having a manifold housing including an upwardly open manifold cavity and a downwardly movable member disposed above said manifold cavity for limited vertical movement and also including an upstanding annular wall means extending upwardly from around said manifold cavity, a metallic bellows member sealingly secured to both said movable member and to said annular wall and together with said manifold cavity defining a load cell cavity, said housing portion including at least one fluid opening connected to said manifold cavity to be interconnected by fluid passage means with another load-receiving member, said plurality of load-receiving members being filled with hydraulic liquid and interconnected for movement of said hydraulic liquid,
- c. a platform section mounted on said base member in such a way as to apply a weight thereon generally equally to said plurality of load-receiving members.
- d. conduit means interconnecting at least one of said load-receiving members and a weighing scale device and also being substantially completely filled with hydraulic liquid, said conduit and said plurality of load-receiving members being interconnected so as to cumulatively displace a predetermined amount of hydraulic liquid in response to a predetermined amount of weight being applied to said load-receiving member, and
- e. said weighing scale device including a weight indicator which is actuated by a column of air compressed by said displaced hydraulic liquid.
Dependencies are inferred from the claim text.