Scraper blade and method with protective rest nub
AssigneeSPX Corporation
InventorsBenjamin Hardy, Curt Hagen, Gary Ferguson
Life of this patent
Estimating the term…
Abstract
Attachment apparatus and method for interlocking attachment of a scraper blade with a drive shaft of a scraped surface heat exchanger includes a blade having dual attachment beams and a central locking member, and at least one pin having dual fingers each for interlocking with a respective attachment beam. The blades feature protective supporting nubs that are outwardly facing from the blade and located proximate to the mounting locations of the blade to provide a supporting rest for the drive shaft pin and blade assembly as it is slid into or out of its outer housing tube.
Claims22
A blade for use with a scraped heat exchanger having a drive shaft with at least one outwardly directed blade mounting pin, and a housing tube having an inwardly facing inner surface, the blade comprising:
- a body having a cross section spanning between a first tip end and a second mounting end;
- and
- at least one projecting nub projecting generally radially outwardly from the blade body when the blade is in a mounted state, said nub dimensioned to project radially outwardly past the pin when the blade is in the mounted state, and dimensioned to provide a resting surface for the blade, the pin and the drive shaft and to support the blade, the pin and the drive shaft when the blade, the pin and the drive shaft are otherwise unsupported in the housing tube.
A blade for use with a scraped heat exchanger having a drive shaft with at least one outwardly directed blade mounting pin, and a housing tube having an inwardly facing inner surface, the blade comprising:
- a body having cross section spanning between a first tip end and a second mounting end;
- and
- at least one supporting means projecting generally radially outwardly from the blade body when the blade is in a mounted state, said supporting means dimensioned to project radially outwardly past the pin when the blade is in the mounted state, and dimensioned to provide a resting surface for the blade, the pin and the drive shaft and to support the blade, the pin and the drive shaft when the blade, the pin and the drive shaft are otherwise unsupported in the housing tube.
A method for use with a scraped heat exchanger having a drive shaft with at least one outwardly directed blade mounting pin for mounting at least one blade, and a housing having an inwardly facing inner surface, the method comprising:
- mounting at least one blade to the drive shaft via at least one pin;
- and
- supporting the blade, the pin and the drive shaft on at least one projecting nub projecting radially outwardly from the blade, the nub dimensioned to project radially outwardly past the pin when the blade is in the mounted state, so that the nub provides a resting surface for the blade, the pin and the drive shaft to support the blade, the pin and the drive shaft when the blade, the pin and drive shaft are otherwise unsupported.
Dependencies are inferred from the claim text.