|Title of Invention||
ADAPTIVE BELT TENSIONER SYSTEM FOR CONTROL OF REVERSIBLE TORQUE LOAD PULLEY
|Abstract||A tensioner (14, 114) for an endless power transmission belt, the belt (12) being driven about a sheave. The tensioner may comprise a base (22, 122), a resilient device (46, 146), and first and second arms (24, 26; 124, 126) pivotally coupled for movement in an opened and a closed direction. The tensioner (14, 114) may also comprise first and second pulleys (25, 27; 125, 127) rotably coupled to the and second arms (24, 26; 124, 126), the resilient device (46, 146) biasing the arms in the closed direction in which the first and second pulleys (25, 27; 125, 127) apply tension to the belt (12). The tensioner (14, 114) may also comprise first and second stops (28, 30; 128, 130) positioned outside the arms on the base (22, 122) to limit the movement of the arms in the open direction in response to an increase in tension in the belt.|
•Claims: I- A structurally coated silica.
2. A structurally coated silica as claimed in claim 1, wherein it
has a carbon content of 10 to 30 wt. %.
3. A structurally coated silica as claimed in claim 1, wherein it
has a BET surface area of 80 to 45: m~/g.
4. A structurally coated silica as claimed in claims 1 or lr
wherein it has a bulk density of 10 to 60 g/i.
5. A structurally coated silica as claimed in claims 1 to 3,
wherein it has a D3? index of 2.4 to 3.9.
6. A process for preparing a structurally coated silica as
claimed in claims 1 to 4, wherein a pyrogenic silica is
sprayed and mixed with water and a coating agent in a suitable
mixing vessel and is then milled and subsequently dried.
7. Use of structurally coated silicas as claimed in claims 1 to 4
as matting agents in lacquers.
8. Lacquers and/or lacquer systems, wherein they contain a
structurally coated silica as claimed in claims 1 to 4.
The resales are as follows:
Almost all the coated samples have greatly improved suspended particle behavior. Sometimes, no settling cue at ail is observed (examples 3 and 4).
Table 7 shows the effect of silicas according to the invention in accordance with examples 1 to 7 which are used in DD blue-streak lacquer P and this is compared with the matting agent in accordance with DE 24 14 473. The blue-streak lacquer is a 2-component polyurethane lacquer and is used in particular to test matting efficiency. It is used as a model for unpigmented wood and furniture lacquers which are difficult to provide with
a matt finish. The direct effect of the matting agent on the i
degree of gloss (reflectometer value; is obtained by always weighing out the same amount of ail -he produces.
The blue-streak lacquer ha-s the following exposition:
The results are as.follows:
All the samples have a low thixotropy and only a snail or zero rheologioal effect on the lacquer system. This has an advantageous effect on the lacquer processing properties.
Table 8 shows the effect of silicas according to the invention in accordance with examples 1 to 7 in the standardized wax detachment test. This test is used to check whether all the coating agent applied to prevent settling our remains on the silica in the lacquer and cannot be removed. For this purpose, the coated silicas are subjected to storage in ethoxypropyl acetate at elevated temperature. If a product passes this test, it can be predicted with high probability that the result will apply in all lacquer systems.
The results show that detachment of the.coating agent cannot'be detected with any of these silicas.
|Indian Patent Application Number||1275/CHENP/2004|
|PG Journal Number||13/2008|
|Date of Filing||09-Jun-2004|
|Name of Patentee||DAYCO PRODUCTS, LLC|
|Applicant Address||1 Prestige Place, Miamisburg, Ohio 45342,|
|PCT International Classification Number||F16H 7/08|
|PCT International Application Number||PCT/US02/39431|
|PCT International Filing date||2002-12-06|