Weighing scales – Self-positioning – Fluid transmission to pressure gauge
Patent
1980-04-17
1981-09-01
Miller, Jr., George H.
Weighing scales
Self-positioning
Fluid transmission to pressure gauge
177128, G01G 504, G01G 2100
Patent
active
042866804
ABSTRACT:
A weighing apparatus particularly for placing under a wheel of a vehicle for giving an indication of axle loading, said apparatus comprising a resilient body formed of an elastomeric material, such as rubber, a cavity being provided in the body and filled with liquid, the cavity being connected to an indicator by means of a conduit for indicating changes in volume of the cavity when the body suffers changes due to compression forces applied thereto by the member being weighed, the body has a resilient metal load plate bonded to the upper surface, a resilient metal load support plate mounted on the plate and a metal plate bonded to the body and spaced below the plate and to which reaction forces are applied during weighing, the plate is provided with a screw-threaded bore in communication with the cavity and a screw-threaded plug is in screw-threaded engagement with the bore, said plug having an inner end portion which engages with part of the wall of the cavity to prevent that part of the wall being deformed when the body suffers changes due to compression forces applied thereto by the member being weighed. By adjusting the position of the plug in the bore adjusts the deformability of the cavity to allow a common read out scale to be provided irrespective of changes in the character or composition of the elastomeric material of the body.
REFERENCES:
patent: 3372764 (1968-03-01), Crotts
patent: 3658142 (1972-04-01), Marshall et al.
patent: 3698492 (1972-10-01), Lejeune
patent: 4184555 (1980-01-01), Maltby et al.
Maltby Robert C.
Maltby Thomas F.
Wakefield Alan W.
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