Fastener wrenching means
AssigneeVSI Corporation
InventorRonald W. Batten
Life of this patent
Estimating the term…
Abstract
There is disclosed an improved power assisted wrenching tool for the attachment of fasteners in loose and interference fit applications, and particularly for use with frangible fasteners. The improvement comprises a readily removable key which is used to immobilize the bolt during attachment of a threaded fastener, typically in a loose fit application. The key is retained in a wrenching tool assembly by a detent ball which is positively locked in the center core of the holder member of the wrenching tool and can only be disengaged by the axial alignment of the holder and the socket drive members of this assembly. The tool is thus easily adaptable for the application of fasteners in either loose or interference fit applications.
Claims24
A rotational wrenching tool which comprises a driven member having a distal socket and a central through bore and slideably received therein a rotationally stationary holder member having a central bore extending from one end thereof, and a central key member received within said central bore of said holder member, and positive means to axially restrain said key member in said holder member comprising
- (a) a cross bore in said holder member intersecting said central bore;
- (b) a ball received within said cross bore and having a diameter greater than the annular thickness of said holder member surrounding said central bore;
- (c) an annular groove in said driven member about said central through bore, intermediate the length of said driven member to provide a lateral outward recess for said ball;
- (d) a distal groove on the inboard end of said key to provide a lateral inward recess for said ball;
- (e) a spring biasing said holder member towards said one end having said central bore;
- and
- (f) abutment stop means on said holder and cooperating means on said key to limit the axial movement of said key into said central bore when the said outer annular groove is opposite said ball;
- whereby said key is axially restrained in said holder when said ball is seated in said distal groove of said key and can be released therefrom by aligning said cross bore with said annular groove, whereby said ball is freed for lateral outward displacement.
The combination of interlocking members comprising:
- (a) an outer member having a through bore with an inner annular groove on the inside wall of said through bore;
- (b) a holder member slidably received in said through bore and having a longitudinal receiving bore in one end thereof, with a ball receptacle intersecting said receiving bore;
- (c) a ball member received in said receptacle and having a diameter slightly greater than the thickness of said receptacle;
- (d) a key member removably mounted in said receiving bore with a groove in its end mounted in said receiving bore;
- (e) resilient means biasing said holder member towards said one end having said central bore;
- and
- (f) abutment stop means on said holder and cooperating means on said key to limit the axial movement of said key into said central bore when said groove is opposite said ball.
Dependencies are inferred from the claim text.