SCALE APPARATUS

• US 3,752,245 A
• Filed: 04/17/1972
• Issued: 08/14/1973
• Est. Priority Date: 04/17/1972
• Status: Expired due to Term

• Current Assignee: Berthuld Thomas Johnson
• Original Assignee: Berthuld Thomas Johnson
• Inventors: Johnson, Berthuld Thomas
• Primary Examiner(s): Miller, Jr., George H.
• Application Number:
  US05/244,668
• Time in Patent Office: 484 Days
• Field of Search: 177/208,209,254 73/141R
• US Class Current: 177/208
• CPC Class Codes: G01G 19/025 wheel-load scales
• CPC Class Codes: G01G 5/04 with means for measuring the pressure imposed by the load on a liquid pressure gauges per se G01L

Abstract

Scale apparatus that includes a base plate having an upwardly opening shallow generally conical or frusto conical recess, a second plate having a bottom flat surface, a weld seam for attaching the plates in abutting relationship at their adjacent peripheral edges whereby said recess and flat surface form a liquid chamber, a fitting attached to said plates and mounting a pressure gauge to measure the liquid pressure in said chamber, a reserve tank at a higher elevation than said chamber, a line having a pressure relief valve for fluidly connecting the tank to the fitting, a line having a hand operated valve connecting the tank to the fitting, a resilient pad mounted on the second plate and a reinforcing plate mounted on the pad. A ramp may be pivotally mounted on a hemisphere member that in turn is mounted on the reinforcing plate whereby the dual wheels may be driven onto the ramp with one wheel on each side of the hemisphere member.

Claims

1. Scale apparatus comprising a meTal base plate, a second metal plate, each of said plates having peripheral edges, first means for securing said plates together at their peripheral edges, said plates having cooperating surface portions to form a liquid chamber, a gauge, and a fitting connected to at least one of said plates to open to said chamber to place the gauge in fluid communication with said chamber, the second plate surface portion being flat and the base plate surface portion having a shallow recess that has a surface portion that is tapered away from the second plate in a direction away from the base plate peripheral edge, and said base plate surface portion having a groove extending from the fitting toward the central part of the base plate surface portion.

2. Scale apparatus comprising a base plate having a peripheral edge and a recessed upper surface portion, a second plate having a peripheral edge secured to the base plate in fluid sealing relationship to form a liquid chamber between the second plate and the recessed surface portion, a gauge, means for connecting the gauge to at least one of the plates to measure the pressure in the liquid chamber, said recessed portion having a tapered surface portion that is tapered away from the second plate in a direction away from the base plate peripheral edge and is relatively shallow, and a resilient pad mounted on the second plate on the side thereof opposite the base plate and a reinforcing plate mounted on the pad opposite the second pad.

3. The apparatus of claim 2 further characterized in that said plates are cylindrical and are of steel, and that said recess is of a generally frusto conical shape having its major base more closely adjacent the second plate than its minor base.

4. Scale apparatus comprising a base plate having a peripheral edge and a recessed upper surface portion, a second plate having a peripheral edge secured to the base plate in fluid sealing relationship to form a liquid chamber between the second plate and the recessed surface portion, said recessed portion having a tapered surface portion that is tapered away from the second plate in a direction away from the base plate peripheral edge and is relatively shallow, a gauge, and means for connecting the gauge to at least one of the plates to measure the pressure in the liquid chamber, said means comprises a fitting having a fluid passageway, a liquid oil reserve tank at a higher elevation than said chamber, a first line connected between said fitting and the tank to fluidly connect the passageway to the interior of the tank, and a pressure relief valve in said line to constantly block fluid flow from the tank to the passageway and permit fluid flow from the passageway to the tank when the pressure in the passageway exceeds a preselected value.

5. The apparatus of claim 4 further characterized in that there is provided a second line connected between said fitting and tank, to fluidly connect the passageway to the interior of the tank and that a hand operated valve is provided in the second line for selectively blocking fluid flow through the second line between the passageway and the tank.

6. Scale apparatus comprising a base plate having a peripheral edge and a recessed upper surface portion, a second plate having a peripheral edge secured to the base plate in fluid sealing relationship to form a liquid chamber between the second plate and the recessed surface portion, said recessed portion having a tapered surface portion that is tapered away from the second plate in a direction away from the base plate peripheral edge and is relatively shallow, a gauge, means for connecting the gauge to at least one of the plates to measure the pressure in the liquid chamber, pivot means mounted on the second plate and a ramp pivotally mounted on the pivot means.

7. The apparatus of claim 6 further characterized in that the pivot means includes a hemispherical member, and that the ramp includes a hemispherical portion to pivot on said hemispherical member and inclined legs on oppOsite sides of said hemispherical portion.

8. Scale apparatus comprising a metal base plate, a second metal plate, each of said plates having peripheral edges, first means for securing said plates together at their peripheral edges, said plates having cooperating surface portions to form a liquid chamber, a gauge, a fitting connected to at least one of said plates to open to said chamber to place the gauge in fluid communication with said chamber, a liquid reserve tank at a higher elevation than the chamber, pressure relief valve means for permitting fluid flow from the passageway to the tank, a line for fluidly connecting the tank to the fitting passageway and hand operated valve means for controlling fluid flow through said line.

9. The apparatus of claim 8 further characterized in that there is provided a ramp and means for mounting the ramp on the second plate for pivotal movement between a position solely supporting the ramp and a position to permit a wheel being moved thereonto.

10. The apparatus of claim 8 further characterized in that said first means comprises a weld seam, that each of the base plate and second plate are generally cylindrical and that the base plate surface portion is of a shallow generally frusto conical shape, is centered relative the cylindrical surface of the base plate and has its major base more closely adjacent the second plate than its minor base.

11. Scale apparatus comprising a metal base plate, a second metal plate, each of said plates having peripheral edges, first means for securing said plates together at their peripheral edges, said plates having cooperating surface portions to form a liquid chamber, a gauge, and a fitting connected to at least one of said plates to open to said chamber to place the gauge in fluid communication with said chamber, one of said surface portions having a groove extending from the fitting toward the central part of the gase plate surface portion for conducting liquid in the chamber of the fitting.

12. The apparatus of claim 11 further characterized in that pivot means is mounted on the second plate and that a ramp is pivotally mounted on the first means.

13. The apparatus of claim 11 further characterized in that said first means comprises a wild seam and that the depth of the chamber increases in a direction away from the wild seam.