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The injuries led to Marlin missing the final seven Cup Series races of the year, and required him to wear a neck brace while recovering. [9] [18] In October of that year, NASCAR safety consultant John Melvin stated that the HANS was a safer restraint than the Hutchens device, the former better preventing forward head movement during a crash. [9]
When the car is too low, the height corrector valve opens to allow more fluid into the suspension cylinder (e.g., the car is loaded). When the car is too high (e.g. after unloading) fluid is returned to the system reservoir via low-pressure return lines. Height correctors act with some delay in order not to correct regular suspension movements.
Hydropneumatic acceleration head reducers minimize the mass of liquid that has to be accelerated when flow velocity changes. Within a piping system, pressure rises when a volume of fluid becomes present. This acceleration head needs to be reduced to prevent damage to pump components and excessive noise. [3]
1. HANS device, 2. Tether (one per side), 3. Helmet anchor (one per side), and 4. Shoulder support. Primarily made of carbon fiber reinforced polymer, the HANS device is shaped like a "U", with the back of the "U" set behind the nape of the neck and the two arms lying flat along the top of the chest over the pectoral muscles.
Head Mirror with head band: to focus light into the cavity under inspection; mirror is concave and is used with a Chiron lamp to produce a parallel beam of light; doctor views through the hole (average diameter of mirror is 3 & 1/2" & that of hole is 1/4") Head mounted lights with head band: to focus light into the cavity under inspection ...
The most effective head restraint must allow a backset motion of less than 60 mm to prevent the hyperextension of the neck during impact. [12] Integrated head restraint or fixed head restraint — refers to a head restraint formed by the upper part of the seat back, or a head restraint that is not height adjustable and cannot be detached from ...
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Hydro massage is a natural remedy that has been known and used for years. [timeframe?] The history of hydrotherapy goes back as far as ancient Greece, but it was made popular by the Romans, who introduced the benefits of bathing and massage to the countries they conquered. Roman public baths were always recognized as a great source of ...