US 5,211,211 AGranted

Pulling tool

AssigneeMichael Rubino

InventorsMichael Rubino, Michael Berg

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Abstract

An improved tool for pulling off a rotor of a motor from a shaft or a fan from a shaft, which improved tool is provided with hooked arms that are releasably but securely held at one end in the housing, without the use of retaining clips, so that the arms do not fall off during use or become lost, and so that they do not interfere with the use of the tool when using the securing bolts for pulling off a rotor. The hooked arms of the invention are also hexagonal shaped, and securing bolts are provided with hexagonal-shaped recesses in their heads, so that the hooked arms may themselves be used for rotating the securing bolts when pulling off a rotor of a motor from a shaft. In addition, the housing of the improved tool of the invention is circular in shape, and is provided with a plurality of equally-spaced holes about its circumference, which holes received the hooked ends of the hooked arms, so that various configurations of hooked arms may be provided to best suit the configuration of vanes and type of fan being pulled off a shaft. To ensure that the each hooked arm is releasably retained in a respective hole of the housing, the end of the arm is provided with a hook defined by a straight piece extending at an acute angle with respect with the main, elongated body of the arm.

Claims21

Dependent claims

In a pulling tool for pulling off a rotor of a motor or a fan from a shaft, said pulling tool comprising an elongated screw having a first end and a second end, a hollow housing with which said screw is threadingly received, said housing comprising a first open end through which threadingly passes said screw, and a second open end through which protrudes said second end of said screw, said housing comprising a first securing means for releasably holding a rotor of a motor, and second securing means for releasably holding a fan, said first securing means comprising a plurality of rotatable bolts and a first plurality of holes formed in said housing for threadingly receiving said plurality of bolts, and said second securing means comprises a plurality of hooked securing arm-members, each said arm-member having a first end and a second hooked end, and a second plurality of holes for removably receiving the first ends of said arm-members, said second end of each said arm-member being capable of being hung so as to protrude beyond said second open end of said housing, wherein the improvement comprises:

said housing comprising a first section having a circular cross section;
said first section of said housing comprising a main, circular portion, and a frusto-conical section connected to said main, circular portion and having sloping surfaces, said frusto-conical section having a smaller-diameter end and a larger-diameter end;
said second plurality of holes being formed in said main circular portion;
and at least one through-hole formed in said frusto-conical section for viewing the interior of said first section and the alignment of said second end of said screw in its operative, protruding state, whereby the user of the tool may visually ensure the proper emplacement of said second end of said screw against a shaft-end;
said housing further comprising a second, smaller-diameter section having a first end constituting said first open end, and a second end connected to said frusto-conical section, said second end of said second section being connected to said smaller-diameter end of said frusto-conical section.

2 more elements

In a pulling tool for pulling off a rotor of a motor or a fan from a shaft, said pulling tool comprising an elongated screw having a first end and a second end, a housing with which said screw is threadingly received, said housing comprising a first open end through which threadingly passes said screw, and a second open end through which protrudes said second end of said screw, said housing comprising a first securing means for releasably holding a rotor of a motor, and second securing means for releasably holding a fan, said first securing means comprising a plurality of rotatable bolts and a first plurality of holes formed in said housing for threadingly receiving said plurality of bolts, and said second securing means comprises a plurality of hooked securing arm-members, each said arm-member having a first end and a second hooked end, and a second plurality of holes for removably receiving the first ends of said arm-members, said second end of each said arm-member being capable of being hung so as to protrude beyond said second open end of said housing, wherein the improvement comprises:

said housing comprising at least a first section having a circular cross section;
said second plurality of holes being formed in said circular cross-section section;
said second plurality of holes being substantially equally spaced about said section;
said second plurality of holes being located level with each other, so that said second plurality of holes are the same distance from said second open and;
said first plurality of holes also being formed in said circular first section, below said second plurality of holes, and closed to said second open end;
each hole of said first plurality of holes being vertically below and horizontally between respective adjacent two holes of said second plurality of equally-spaced holes, so that said bolts do not interfere with the passage and use of said arm-members, said first plurality of holes being located level with each other, so that said first plurality of holes lie the same distance from second open end, and lie closer to said second open end than said second plurality of holes.

3 more elements

said housing comprising a first section having a circular cross section;
said first section of said housing comprising a main, circular portion, and a frusto-conical section connected to said main, circular portion and having sloping surfaces, said frusto-conical section having a smaller-diameter end and a larger-diameter end;
said second plurality of holes being formed in said main circular portion;
said second plurality of holes comprising at least six holes spaced about said main circular portion, said at least six holes being located level with each other, so that said at least six holes are the same distance from second open end;
said housing further comprising a second, smaller-diameter section having a first end constituting said first open end, and a second end connected to said frusto-conical section, said second end of said second section being connected to said smaller-diameter end of said frusto-conical section.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 07/900,348Filed 18 Jun 1992 · continuation in part
Priority: 29 Jul 1991
Granted: 18 May 1993
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

B25B 27/02
Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise…: for…
B25B 27/023
For connecting objects by press fit or detaching same: using screws
Y10T 29/49012
Dynamoelectric machine: rotor
Y10T 29/49821
Disassembling: by altering or destroying work part or connector