Tools and attachments therefor

Claim 2

In combination: a rotary impact tool comprising a first casing, a shaft rotatably mounted in and protruding from said first casing, a motor in said first casing, means in said first casing for imparting rotary impacts to said rotatably mounted shaft having an output member drive connected to said shaft and an input member, and means drive connecting said input member to said motor; an attachment for threading retainers onto bolts and other fasteners while holding the fastener against rotation which comprises a second casing having therethrough an aperture through which the rotatably mounted shaft of the rotary impact tool extends, a retainer rotating member, means in said second casing and drive connected to the rotatably mounted shaft of the rotary impact tool for rotating said retainer-rotating member, and means mounted in said second housing for axial, nonrotatable movement and extending therefrom which is engageable with a fastener to prevent rotation of said fastener; and means detachably connecting said second casing to said first casing.

Claim 3

The combination of claim 1, wherein the retainer-rotating means includes a gear housed in said second casing and having a hub extension extending to the exterior of said second casing and a retainer-engageable socket member detachably fixed to said hub extension.

Claim 4

The combination of claim 2, wherein the means for rotating the retainer-rotating member comprises a second gear in said second casing which is meshed with the first-mentioned gear, said second gear being journaled on the rotatably mounted shaft of the rotary impact tool and fixed to said shaft for rotation therewith.

Claim 5

The combination of claim 2, wherein the means for preventing rotation of the threaded fastener includes a sleevelike retainer fixed in and against rotation relative to said second casing and extending through said hub extension, a driver bit having one end thereof configured to fit in an aperture in the shank end of a fastener to prevent rotation of the fastener, said driver bit being slidable in but nonrotatable with respect to said sleevelike retainer, and resilient biasing means in said retainer urging said driver bit in a fastener engaging direction.

Claim 6

In combination: a rotary impact tool comprising a first casing, a shaft rotatably mounted in and protruding from said first casing, a motor in said first casing, means in said first casing for imparting rotary impacts to said rotatably mounted shaft including an output member drive connected to said rotatably mounted shaft and an input member, and a reduction drive drive connecting said input member to said motor; an attachment for threading retainers onto bolts and other fasteners while holding the fastener against rotation which comprises a second casing having therethrough an aperture through which the rotatably mounted shaft of the rotary impact tool extends, a first gear housed in said second casing and having a hub extension extending to the exterior of said casing, a retainer engageable socket member detachably fixed to said hub extension, means for rotating said first gear comprising a second gear in said second casing meshing with said first gear, said second gear being journaled on and drive connected to the rotatably mounted shaft of the rotary impact tool, a sleevelike retainer in and fixed against rotation relative to said second casing and extending through said hub extension, a driver bit having one end thereof configured to fit in an aperture in the shank end of a fastener to prevent rotation of the fastener, said driver bit being slidable in but nonrotatable with respect to said sleevelike retainer, and resilient biasing means in said retainer urging said driver bit in a fastener engaging direction; and means detachably connecting said second casing to said first casing.

Claim 7

In combination: a rotary impact tool comprising a first casing, a shaft rotatably mounted in and protruding from said first casing, a motor in said first casing, means in said first casing for imparting rotary impacts to said rotatably mounted shaft including an output member drive connected to said rotatably mounted shaft and an input member, and a reduction drive drive connecting said input member to said motor; an attachment for threading retainers onto bolts and other fasteners while holding the fastener against rotation which comprises a second casing having therethrough an aperture through which the rotatably mounted shaft of the rotary impact tool extends, a first gear housed in said second casing and having a hub extension extending to the exterior of said casing, a retainer engageable socket member detachably fixed to said hub extension, means for rotating said first gear comprising a second gear in said second casing meshing with said first gear, said second gear being journaled on and drive connected to the rotatably mounted shaft of the rotary impact tool, a sleevelike retainer in and fixed against rotation relative to said second casing and extending through said hub extension, a driver bit having one end thereof configured to fit in an aperture in the shank end of a fastener to prevent rotation of the fastener, said driver bit being slidable in but nonrotatable with respect to said sleevelike retainer, and resilient biasing means in said retainer urging said driver bit in a fastener engaging direction; and means detachably connecting said second casing to said first casing.

Claim 8

The combination of claim 5, together with means positioning said attachment relative to said rotary impact tool which comprises a boss on said first casing configured to fit in the recess in the second casing through which the rotatably mounted shaft of the rotary impact tool extends.

Claim 9

An attachment adapted to be employed in conjunction with a tool having a rotatable driven shaft protruding therefrom, comprising a casing; a first gear having a noncircular central bore therethrough rotatably supported in said casing, there being an opening in said casing in alignment with said bore through which the tool shaft is adapted to be inserted to provide a drive connection to said first gear; a second gear in said casing in mesh with said first gear, said second gear having an integral hub portion protruding through said casing to the exterior thereof; a retainer receiving member detachably fixed to said hub portion exteriorly of said casing; and a fastener engaging member slidably mounted in said casing and extending to the exterior thereof through said second gear hub portion, said fastener engaging member being restrained against rotation relative to the casing.

Claim 10

An attachment adapted to be employed in conjunction with a tool having a rotatable driven shaft protruding therefrom, comprising a casing; a first gear having a noncircular central bore therethrough rotatably supported in said casing, there being an opening in said casing in alignment with said bore through which the tool shaft is adapted to be inserted to provide a drive connection to said first gear; a second gear in said casing in mesh with said first gear, said second gear having an integral hub portion protruding through said casing to the exterior thereof; a retainer receiving member detachably fixed to said hub portion exteriorly of said casing; and a fastener engaging member slidably mounted in said casing and extending to the exterior thereof through said second gear hub portion, said fastener engaging member being restrained against rotation relative to the casing.

Claim 11

The attachment of claim 7, together with a sleevelike retainer member in said casing and restrained against rotation relative thereto, said retainer member having a noncircular bore therethrough and said fastener engaging member having a cross-sectional configuration matching that of said bore and being slidably disposed in said bore.

Claim 12

The attachment of claim 8, together with a spring member disposed in said retainer member and urging said fastener engaging member in a fastener engaging direction.