Fan unit having blades manufactured by blow molding and made from thermoplastic elastomer
First Claim
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1. A fan unit comprising:
- a motor having an output shaft;
a fan casing mounted non-rotatably on said output shaft of said motor and including an annular rear casing half having a plurality of angularly spaced-apart groove units, and an annular front casing half disposed in front of said rear casing half and having a plurality of angularly spaced-apart groove units;
a plurality of blades mounted on and extending radially and outwardly from said front and rear casing halves, each of said blades including a hollow blade body that is made from a thermoplastic elastomer, that is manufactured by a blow molding process and that is exposed outwardly from said front and rear casing halves, and a coupler element that is fixed to said blade body, that is clamped between said front and rear casing halves and that has a rearwardly-extending tongue unit received snugly in a respective one of said groove units in said rear casing half, and a frontwardly-extending tongue unit received snugly in a respective one of said groove units in said front casing half; and
a fastener unit for fastening said front and r ear casing halves securely so as to prevent removal of said blades from said front and rear casing halves.
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Abstract
A fan unit includes a fan casing and a plurality of blades extending radially and outwardly from the fan casing. Each of the blades includes a hollow blade body that is made from a thermoplastic elastomer, that is manufactured by a blow molding process, and that is exposed outwardly from the fan casing, and a coupler element that is fixed to the blade body and that is clamped between front and rear casing halves of the fan casing.
47 Citations
6 Claims
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1. A fan unit comprising:
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a motor having an output shaft;
a fan casing mounted non-rotatably on said output shaft of said motor and including an annular rear casing half having a plurality of angularly spaced-apart groove units, and an annular front casing half disposed in front of said rear casing half and having a plurality of angularly spaced-apart groove units;
a plurality of blades mounted on and extending radially and outwardly from said front and rear casing halves, each of said blades including a hollow blade body that is made from a thermoplastic elastomer, that is manufactured by a blow molding process and that is exposed outwardly from said front and rear casing halves, and a coupler element that is fixed to said blade body, that is clamped between said front and rear casing halves and that has a rearwardly-extending tongue unit received snugly in a respective one of said groove units in said rear casing half, and a frontwardly-extending tongue unit received snugly in a respective one of said groove units in said front casing half; and
a fastener unit for fastening said front and r ear casing halves securely so as to prevent removal of said blades from said front and rear casing halves. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification