US 7,000,458 B2Granted

Weighing equipment for concrete material

AssigneeObayashi Corporation

InventorsShigeyuki Sogo, Ryuichi Chikamatsu, Koji Watanabe

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Abstract

A measuring apparatus (1) for concrete materials, comprising an aggregate hopper (3) as aggregate feed means for feeding fine aggregate (2) as aggregate, a water supply pipe (4) as water supply means, an aggregate measuring bin (51) for storing and measuring the fine aggregate (2) supplied from the aggregate hopper (3), a measuring tank (5) for storing the fine aggregate (2) supplied from the aggregate hopper (3) as water-immersed aggregate together with water supplied through the water supply pipe (4), a load cell (6) as water-immersed aggregate mass measuring means for measuring the mass of the water-immersed aggregate in the measuring tank, an electrode sensor (7) as water level measuring means for measuring the water level of the water-immersed aggregate in the measuring tank (5), and a water level holding device (8) as water level holding means for holding the water level of the water-immersed aggregate in the measuring tank (5) at a desired water level.

Claims9

Dependent claims

A measuring apparatus for concrete materials, comprising:

aggregate feed means for feeding aggregate;
water supply means;
an aggregate measuring bin for storing and measuring aggregate supplied from said aggregate feed means;
a measuring tank for storing aggregate supplied from said aggregate feed means as water-immersed aggregate together with water supplied from said water supply means, with a bottom lid capable of maintaining water tightness attached at a bottom opening in such a way as to be free to open or close;
water-immersed aggregate mass measuring means for measuring mass of water-immersed aggregate in said measuring tank;
water level measuring means for measuring a water level of the water-immersed aggregate in said measuring tank;
and
water level holding means for absorbing water exceeding a desired water level from said measuring tank to hold the desired water level of the water-immersed aggregate in said measuring tank and for measuring an amount of the absorbed water,
wherein the water level holding means comprises a suction pipe placed so as to move up and down freely, an absorbed water measuring storage tank, which is connected so as to communicate with the suction pipe, for measuring the absorbed water, and suction means connected so as to communicate with the absorbed water measuring storage tank;
and
wherein said aggregate feed means can feed the aggregate to said aggregate measuring bin and said measuring tank.

8 more elements

A measuring apparatus for concrete materials, comprising:

aggregate feed means for feeding aggregate;
water supply means;
a measuring tank for storing aggregate supplied from said aggregate feed means as water-immersed aggregate together with water supplied from said water supply means, having a bottom lid capable of maintaining water tightness attached at a bottom opening in such a way as to be free to open or close;
water-immersed aggregate mass measuring means for measuring mass of water-immersed aggregate in said measuring tank;
water level measuring means for measuring a water level of the water-immersed aggregate in said measuring tank;
and
water level holding means for absorbing water exceeding a desired water level from said measuring tank to hold the desired water level of the water-immersed aggregate in said measuring tank and for measuring an amount of the absorbed water,
wherein the water level holding means comprises a suction pipe placed so as to move up and down freely, an absorbed water measuring storage tank, which is connected so as to communicate with the suction pipe, for measuring the absorbed water, and suction means connected so as to communicate with the absorbed water measuring storage tank.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/481,454Filed 10 Jun 2002
Priority: JP 2001-18588520 Jun 2001
Published: US 2005/0073904 A17 Apr 2005
Granted: 21 Feb 2006
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

G01G 19/22
Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups: for apportioning materials by weighing prior…
G01F 23/241
By measuring variations of resistance of resistors due to contact with conductor fluid: for discrete levels
G01G 13/02
Weighing apparatus with automatic feed or discharge for weighing-out batches of material: means for automatically loading weigh pans or other…
G01G 17/00
Apparatus for or methods of weighing material of special form or property