Deflection-restrained load cell for on-board vehicle weighing systems
First Claim
1. In a load cell assembly providing part of an on-board load weighing system for a vehicle having a frame member and a load support member to which the load which is to be measured is applied, the load cell assembly being adapted to be located between the load support member and the frame member and including elongated beam means having a central portion and first and second ends, means for securing the first and second ends of the beam means to the frame member of the vehicle and for elevating the central portion of the beam means above the frame member, elongated load concentrating means to be secured to the load support member and integral with the central portion of the beam means and having first and second ends defining, in combination with the first and second ends of the beam means, a pair of slots extending inwardly from said ends for directing the applied load to the central portion of the beam means, an improvement comprising:
- restraining means to be secured to the frame member for limiting deflection of the first and second ends of the load concentrating means in a direction toward the load support means.
2 Assignments
0 Petitions
Accused Products
Abstract
A problem that is often encountered under uneven terrain conditions with on-board load weighing systems for vehicles, such as logging trucks, having a frame member and a load support member to which a load which is to be measured is applied, is that structural failures occur in the load cell assemblies included in the on-board load weighing system. The cause of these structural failures is traced to rotation of the load cell assemblies resulting in undue tensive forces in the load cells thereof. Various restraining devices are discussed for limiting the upward deflection of an upper, load concentrating portion of the load cell to maintain the tensive forces within acceptable levels.
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Citations
8 Claims
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1. In a load cell assembly providing part of an on-board load weighing system for a vehicle having a frame member and a load support member to which the load which is to be measured is applied, the load cell assembly being adapted to be located between the load support member and the frame member and including elongated beam means having a central portion and first and second ends, means for securing the first and second ends of the beam means to the frame member of the vehicle and for elevating the central portion of the beam means above the frame member, elongated load concentrating means to be secured to the load support member and integral with the central portion of the beam means and having first and second ends defining, in combination with the first and second ends of the beam means, a pair of slots extending inwardly from said ends for directing the applied load to the central portion of the beam means, an improvement comprising:
restraining means to be secured to the frame member for limiting deflection of the first and second ends of the load concentrating means in a direction toward the load support means. - View Dependent Claims (2, 3, 4, 5)
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6. An improved load cell assembly for inclusion in an on-board load weighing system for a vehicle having a frame member and a load support member to which the load which is to be measured is applied, the load cell assembly being adapted to be located between the load cell support member and the frame member and including:
- elongated beam means having a central portion and first and second ends;
means securing said first and said second ends of said beam means to the frame member of the vehicle and elevating said central portion of said beam means above the frame member;
elongated load concentrating means secured to the load support member and intergral with the central portion of said beam means and having first and second ends defining, in combination with said first and second ends of said beam means, a pair of slots extending inwardly from said ends for directing the applied load to the central portion of said beam means; and
, restraining means secured to the frame member for limiting deflection of said first and said second ends of said load concentrating means in a direction toward the load support means. - View Dependent Claims (7)
- elongated beam means having a central portion and first and second ends;
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8. An improved bolster and load cell assembly for inclusion in an on-board weighing system for a vehicle having a frame member and a load support member to which the load which is to be measured is applied, the bolster and load cell assembly including:
- an elongated pressure plate affixed to and forming part of the load support member;
a load cell assembly adapted to be located between said pressure plate and the frame member and including an elongated beam means having a central portion and first and second ends, and means securing said first and second ends of said beam means to the frame member of the vehicle and elevating said central portion of said beam means above the frame member;
an elongated load concentrating means secured to said pressure plate and intergral with the central portion of said beam means and having first and second ends defining, in combination with said first and second ends of said beam means, a pair of slots extending inwardly from said ends for directing the applied load to said central portion of said beam means, said elongated pressure plate having first and second ends extending beyond said first and second ends of said load concentrating means in assembly and overlying said first and second ends of said beam means, said pressure plate further having defined therein holes extending therethrough in said first and second ends;
first and second fastener means, each having a first portion which is enlarged with respect to the diameter of said holes in said elongated beam means and a second, shaft portion which has a diameter less than that of said holes in said elongated beam means; and
means in said first and said second ends of said beam means receiving said shaft portions so that said shaft portions extend through said holes in said pressure plate with said first portions being situated above said pressure plate.
- an elongated pressure plate affixed to and forming part of the load support member;
Specification