Geometrical instruments – Area integrators – Electrical
Patent
1980-11-26
1984-05-15
Haroian, Harry N.
Geometrical instruments
Area integrators
Electrical
33174G, 33181AT, 33288, G01B 338, G01B 514
Patent
active
044479611
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL AREA
When a vehicle receives damage that effects or may affect its coachwork or chassis, and especially its basic geometry--i.e. those essential points on whose dimensional accuracy the behaviour and safety of the vehicle depends (generally, the points where the mechanical elements are assembled to the body or chassis, or guide marks deliberately placed by the manufacturer at certain places), it is usually repaired with the help of a bench, which serves as a support, and often also as a reference base for a device for dimensional checking, either by: to the vehicle model in question, fixes in space the shape and position of the essential check points that constitute its original geometry, procedures (mechanical, optical, electrooptical, etc.) the dimensions measured on the vehicle are compared with the corresponding "original" dimensions, which are generally given in a specific list for the vehicle in question.
The previous technique
Under the previous technique, not only were the benches only exceptionally sufficiently rigid to provide adequate precision in the measurements or checks carried out, and especially in view of the state of the floor of the workshop (for benches used "at floor level"), or of the play in the operation of the lifting mechanism (for the so-called "lifting benches"), but also the manufacturers bored their positioning holes not in accordance with a universal law, but haphazardly and with successive changes that led to arbitrary drilling plans. Such positioning of the holes ruled out any possibility of compatibility between the existing devices, tools or appliances. The recent appearance of so-called "universal" cross members--but whose dimensions and hole positions also varied from one manufacturer to another--has not solved the problem at all, and has also involved a high additional expense and awkward handling operations for the user. Such incompatibility, though in practice it protected the manufacturer, considerably inconvenienced the repairer, and consequently led to extended out-of-action times and higher costs that were prejudicial to the general interest.
With regard in particular to the appliances and devices using the so-called "measurement" method: progress of the work, as the operations of straightening up the damaged parts proceeded; and in storage; for example, also, they could not be moved easily to enable the assessor to check on the conformity of the work to specification and on its results; equipment. The consequence of this was that: conditions that usually apply in body-repair shops; conscientious; helped to increase the cost, which everyone deplores, of car repairs.
It would therefore be an advantage to have an appliance: out with precision; as a "lifting bench"; origins that can easily be obtained locally by purchase, lease, loan or on any other basis, and would enable them to be handled conveniently; obtaining in body-repair shops, which in practice are fairly far removed from those met with in measuring laboratories; small artisanal-scale firms; trade, on the one hand; consequently substantial economies, on the other hand. different points on the same vehicle, on several vehicles in the same shop, or even transported without risk to different places of work, that may be remote from each other.
DESCRIPTION OF THE INVENTION
In consequence of the above, the present invention has as its precise object an appliance that can fulfill the various needs mentioned and provide an answer to the disadvantages referred to.
The first and a most important object of the invention is to obtain a very rigid bench, particularly in resisting torsion, so as to maintain an extremely flat working surface and to provide a valid reference basis for the measurements or checks, whatever the method or equipment used for these measurements or checks.
The structure of the frame (FIG. 1, No. 1) has thus been designed as a true integral prismatic box, formed by assembly of 2 longitudinal beams 1a and 2 main surfaces 1b, 1c, reinforced by transverse bulkheads 1e.
The two long
REFERENCES:
patent: 1332599 (1920-03-01), Bradford
patent: 1577133 (1926-03-01), Learnihan
patent: 2336506 (1943-12-01), Saunders
patent: 2427695 (1947-09-01), Smith
patent: 3805396 (1974-04-01), Hunnicutt
patent: 3869804 (1975-03-01), Friend
patent: 4151737 (1979-05-01), Specktor
patent: 4207681 (1980-06-01), Bayorgeon et al.
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