Mobile speedometer tester
First Claim
1. A mobile speedometer tester comprising:
- a trailer frame comprising at least two main wheels;
at least one roller rotatably mounted to said trailer frame;
a means of measuring the rate of rotation of said roller; and
a means to retract and extend said main wheels comprising a bellcrank rotatably attached to each said main wheel, each said main wheel being attached to one end of one said bellcrank at a bellcrank axle hole, bellows being rotatably attached to another end of said bellcrank at a bellows attach point, one end of each said bellows being attached to said bellcrank and another end of each said bellows being attached to said trailer frame, said bellcrank comprising a spur leg and a bellows leg, an extreme of one said spur leg being rigidly attached to an extreme of said bellows leg at an approximately right angle at a leg intersection, said bellcrank being rotatably attached to said trailer frame at a bellcrank attach point disposed at said leg intersection, whereby said bellcrank may rotate relative to said frame about said bellcrank attach point, said bellcrank axle hole being disposed at an extreme of said spur leg opposite said leg intersection, said bellows attach point being disposed on said bellows leg.
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Accused Products
Abstract
A mobile speedometer tester comprising at least two main wheels rotatably attached to a trailer frame, and a trailer frame. A target disk, pickup and totalizer measure the rate of roller rotation, and bellcranks rotatably mounted to the trailer frame allow the main wheels to be extended and retracted. A brake is provided to stop the rollers from rotating, and the front wheel is retractable by means of an electric motor. The main wheels are quickly and easily removable from the bellcranks. Ramps attached to the trailer frame allow test vehicles to drive up onto the mobile speedometer tester in order to test their speedometers. A motorcycle version allows motorcycle speedometers to be tested. The motorcycle version includes an engine rotatably attached to the trailer frame, an engine drive wheel which imparts rotary motion to one roller, an engine jack to bring the engine drive wheel in and out of contact with a roller, and an auxiliary control panel which allows the motorcycle speedometer test operator to start the engine, and to brake the roller to a halt. An alternate embodiment provides a dynamometer for measuring torque imparted to the rollers by a test vehicle.
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Citations
29 Claims
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1. A mobile speedometer tester comprising:
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a trailer frame comprising at least two main wheels; at least one roller rotatably mounted to said trailer frame; a means of measuring the rate of rotation of said roller; and a means to retract and extend said main wheels comprising a bellcrank rotatably attached to each said main wheel, each said main wheel being attached to one end of one said bellcrank at a bellcrank axle hole, bellows being rotatably attached to another end of said bellcrank at a bellows attach point, one end of each said bellows being attached to said bellcrank and another end of each said bellows being attached to said trailer frame, said bellcrank comprising a spur leg and a bellows leg, an extreme of one said spur leg being rigidly attached to an extreme of said bellows leg at an approximately right angle at a leg intersection, said bellcrank being rotatably attached to said trailer frame at a bellcrank attach point disposed at said leg intersection, whereby said bellcrank may rotate relative to said frame about said bellcrank attach point, said bellcrank axle hole being disposed at an extreme of said spur leg opposite said leg intersection, said bellows attach point being disposed on said bellows leg. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A mobile speedometer tester comprising:
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a trailer frame comprising at least two main wheels; at least one roller rotatably mounted to said trailer frame; a means of measuring the rate of rotation of said roller; and an engine rotatably attached to said trailer frame, an engine drive wheel attached to the output of said engine, the distance between said engine drive wheel and one said roller being determined by an engine jack upon which said engine depends, whereby a motorcycle speedometer engaged with the front wheel of a motorcycle may be calibrated.
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22. A mobile speedometer tester comprising:
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at least two main wheels rotatably attached to a trailer frame and at least one roller rotatably mounted to said trailer frame; a means of measuring the rate of rotation of said roller; a means to extend and retract said main wheels comprising a bellcrank rotatably attached to each said main wheel, each said main wheel being attached to one end of one said bellcrank at a bellcrank axle hole, bellows being rotatably attached to another end of said bellcrank at a bellows attach point, one end of each said bellows being attached to said bellcrank and another end of each said bellows being attached to said trailer frame, said bellcrank comprising a spur leg and a bellows leg, an extreme of one said spur leg being rigidly attached to an extreme of said bellows leg at an approximately right angle at a leg intersection, said bellcrank being rotatably attached to said trailer frame at a bellcrank attach point disposed at said leg intersection, whereby said bellcrank may rotate relative to said frame about said bellcrank attach point, said bellcrank axle hole being disposed at an extreme of said spur leg opposite said leg intersection, said bellows attach point being disposed on said bellows leg; a means of quickly and easily removing said main wheels; and a means of braking said at least one roller, whereby said at least one roller may be immobilized, so that a vehicle being tested may be driven off said mobile speedometer tester. - View Dependent Claims (23)
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24. A mobile speedometer tester comprising:
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at least two main wheels rotatably attached to a trailer frame and at least one roller rotatably mounted to said trailer frame; a means of measuring the rate of rotation of said roller; a means to extend and retract said main wheels; a means of quickly and easily removing said main wheels comprising bellcranks attached to said trailer frame, a bellcrank axle hole disposed in each said bellcrank, a main wheel axle rotatably attached to each said main wheel, each said main wheel axle being sized to fit in the bellcrank axle holes, a pin hole in each said main wheel axle, and a pin sized to fit in each of the pin holes; and a means of braking said at least one roller, whereby said at least one roller may be immobilized, so that a vehicle being tested may be driven off said mobile speedometer tester.
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25. A mobile speedometer tester comprising:
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at least two main wheels rotatably attached to a trailer frame and at least one roller rotatably mounted to said trailer frame; a means of measuring the rate of rotation of said roller; a means to extend and retract said main wheels; a meaning of quickly and easily removing said main wheels; and a means of braking said at least one roller comprising a manifold communicating with an air compressor, and communicating with brake calipers through a brake solenoid valve, a brake disc within each said brake caliper, one said brake disc being attached to each at least one said roller, whereby said at least one roller may be immobilized, so that a vehicle may be driven off said mobile speedometer tester after being tested.
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26. A mobile speedometer tester comprising:
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at least two main wheels rotatably attached to a trailer frame and at least one roller rotatably mounted to said trailer frame; a means of measuring the rate of rotation of said roller; a means to extend and retract said main wheels; a means of quickly and easily removing said main wheels; a means of braking said at least one roller, whereby said at least one roller may be immobilized, so that a vehicle being tested may be driven off said mobile speedometer tester; and an engine rotatably attached to said trailer frame, an engine drive wheel attached to the output of said engine, the distance between said engine drive wheel and one said roller being determined by an engine jack upon which said engine depends, whereby one said roller may be driven by said engine drive wheel. - View Dependent Claims (27, 28)
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29. A mobile speedometer tester comprising:
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at least two main wheels rotatably attached to a trailer frame and at least one roller rotatably mounted to said trailer frame; a means to extend and retract said main wheels; a means of quickly and easily removing said main wheels comprising a bellcrank rotatably attached to each said main wheel, each said main wheel being attached to one end of one said bellcrank at a bellcrank axle hole, bellows being rotatably attached to another end of said bellcrank at a bellows attach point, one end of each said bellows being attached to said bellcrank and another end of each said bellows being attached to said trailer frame, said bellcrank comprising a spur leg and a bellows leg, an extreme of one said spur leg being rigidly attached to an extreme of said bellows leg at an approximately right angle at a leg intersection, said bellcrank being rotatably attached to said trailer frame at a bellcrank attach point disposed at said leg intersection, whereby said bellcrank may rotate relative to said frame about said bellcrank attach point, said bellcrank axle hole being disposed at an extreme of said spur leg opposite said leg intersection, said bellows attach point being disposed on said bellows leg; a means of braking said at least one roller; and a means of measuring the torque imparted to said at least one roller by a test vehicle.
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Specification