Compact universal offset pulling head for fasteners
AssigneeSPS Technologies, Inc.
InventorsCristinel Ovidiu Cobzaru, Karthikeyan Pichaikannu
Life of this patent
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Abstract
A universal offset pulling head assembly for exerting an axial pulling force on a fastener allows the same pulling head assembly to be utilized for a variety of different fastener sizes and types by exchanging a front plate assembly, where the front plate assembly may comprise variable nose pieces according to the type of fastener to be installed. Because the front plate assembly is subject to the most severe wear, other components of the pulling head assembly may continue to be utilized and the front plate assembly discarded. The disclosed pulling head assembly utilizes a stationary guiding member which prevents damage which might otherwise occur because of severe bending moments.
Claims18
A pulling head assembly for exerting an axial pulling force on a fastener member, the fastener member extending through a work piece, the pulling head assembly comprising:
- a housing having a front end and a rear end, the front end and the rear end defining a first axis;
- a drawbolt having an upper section and a lower section, the lower section disposed within the housing, the drawbolt connected to an actuation means for axial movement of the drawbolt relative to the housing along the first axis;
- the upper section of the drawbolt comprising a gripping means for engaging the fastener member, the gripping means defining a second axis parallel to the first axis, the lower section comprising a guide member engagement surface;
- and
- a front plate removably attached to the front end of the of the housing, the front plate comprising a nose piece having an aperture, the axis of the aperture coinciding with the second axis, the front plate further comprising a stationary guiding member axially extending into the housing, wherein the guide member engagement surface of the drawbolt slideably engages a portion of the stationary guiding member as the drawbolt axially moves relative to the housing.
A pulling head assembly for exerting an axial pulling force on a fastener member, the fastener member extending through a work piece, the pulling head assembly comprising:
- a housing having a front end and a rear end, the front end and the rear end defining a first axis;
- a drawbolt having an upper section and a lower section, the lower section disposed within the housing, the lower section comprising a guide member engagement surface, the drawbolt connected to an actuation means for axial movement of the drawbolt relative to the housing along the first axis;
- the upper section of the drawbolt comprising three jaw members configured to form a conical front shape, the conical front shape defining a second axis;
- and
- a front plate removably attached to the front end of the of the housing, the front plate comprising a nose piece having an aperture, the axis of the aperture coinciding with the second axis, the front plate further comprising a stationary guiding member axially extending into the housing, wherein the guide member engagement surface of the drawbolt slideably engages a portion of the stationary guiding member as the drawbolt axially moves relative to the housing.
A pulling head assembly for exerting an axial pulling force on a fastener member, the fastener member extending through a work piece, the pulling head assembly comprising:
- a housing having a front end and a rear end, the front end and the rear end defining a first axis, the housing further comprising a nose piece having an aperture, the axis of the aperture defining a second axis, the first axis and second axis being in parallel relationship with one another;
- a drawbolt having an upper section and a lower section, the lower section disposed within the housing, the lower section comprising a guide member engagement aperture having an axis coinciding with the first axis, the drawbolt connected to an actuation means for axial movement of the drawbolt relative to the housing along the first axis;
- the upper section of the drawbolt comprising three jaw members configured to form a conical front shape, wherein the conical front shape forms an angle greater than forty-five degrees, the conical front shape defining an axis coinciding with the second axis;
- and
- a front plate removably attached to the front end of the of the housing, the front plate comprising a stationary guiding member axially extending into the housing, wherein the guide member engagement aperture of the drawbolt slideably engages a portion of the stationary guiding member as the drawbolt axially moves relative to the housing.
Dependencies are inferred from the claim text.