Jack stand with safety locking device

Claim 2

A jack stand comprising: a first generally upright tubular member, said first tubular member having means for defining a base for resting on a horizontal surface, and having first and second holes through opposite sides of said first tubular member adjacent the upper end thereof for receiving a pin, the region of said first tubular member surrounding said first and second holes being formed outward from the inner surface of said first tubular member, each of said first and second holes having a cross-section having a circular portion and a slot like portion; a second generally upright tubular member coaxial with and slideable within said first tubular member, said second tubular member having means adjacent the upper end thereof for engaging and supporting a part of an automobile, said second tubular member further having a plurality of horizontally disposed through holes, each at one of a plurality of elevations and each generally alignable with said first and second holes in said first tubular member; and a pin for extending through said horizontally disposed hole in said first tubular member and any of said horizontally disposed holes in said second tubular member to retain said first and second tubular members in a selected relative axial disposition, said pin having at least one protruding region adjacent one end thereof for fitting through said slot like portion of said first and second holes in said first tubular member.

Claim 3

The jack stand of claim 1 wherein said pin is a substantially cylindrical pin swaged to provide a pair of diametrically opposed protruding regions.

Claim 4

The jack stand of claim 2 wherein one end of said pin is tapered and the other end is flattened, and wherein said pin is coupled to said first tubular member by a length of chain.

Claim 5

A jack stand comprising: a generally upright tubular member, said first tubular member having means for defining a base for resting on a horizontal surface, and having a horizontally disposed through hole adjacent the upper end thereof; a second generally upright tubular member coaxial with and slideable within said first tubular member, said second tubular member having adjacent the upper end thereof means for engaging and supporting a part of an automobile, said second tubular member further having a plurality of horizontally disposed through holes, each at one of a plurality of elevations and each generally alignable with said through hole in said first tubular member; a pin for extending through said horizontally disposed hole in said first tubular member and any of said horizontally disposed holes in said second tubular member to retain said first and second tubular members in a selected relative axial disposition; and at least one region of said pin and said horizontally disposed hole in said first tubular member having cooperatively disposed sections deviating from a circular section, wherein a portion of the region surrounding said horizontally disposed hole in said first tubular member is spaced apart from said second tubular member, whereby said pin may be inserted and the non-circular region of said pin may be rotated therebetween so as to resist direct axial withdrawal thereof.

Claim 6

A jack stand comprising: a generally upright tubular member, said first tubular member having means for defining a base for resting on a horizontal surface, and having a horizontally disposed through hole adjacent the upper end thereof; a second generally upright tubular member coaxial with and slideable within said first tubular member, said second tubular member having adjacent the upper end thereof means for engaging and supporting a part of an automobile, said second tubular member further having a plurality of horizontally disposed through holes, each at one of a plurality of elevations and each generally alignable with said through hole in said first tubular member; a pin for extending through said horizontally disposed hole in said first tubular member and any of said horizontally disposed holes in said second tubular member to retain said first and second tubular members in a selected relative axial disposition; and at least one region of said pin and said horizontally disposed hole in said first tubular member having cooperatively disposed sections deviating from a circular section, wherein a portion of the region surrounding said horizontally disposed hole in said first tubular member is spaced apart from said second tubular member, whereby said pin may be inserted and the non-circular region of said pin may be rotated therebetween so as to resist direct axial withdrawal thereof.

Claim 7

A jack stand comprising: a first generally upright tubular member, said first tubular member having means for defining a base for resting on a horizontal surface, and having first and second horizontally disposed through holes adjacent the upper end thereof and through opposite sides of said first tubular member; a second generally upright tubular member coaxial with and slideable within said first tubular member, said second tubular member having adjacent the upper end thereof means for engaging and supporting a part of an automobile, said second tubular member further having a plurality of horizontally disposed through holes, each at one of a plurality of elevations and each generally alignable with said through hole in said first tubular member; a pin for extending through said horizontally disposed hole in said first tubular member and any of said horizontally disposed holes in said second tubular member to retain said first and second tubular members in a selected relative axial disposition; and at least one region of said pin and each of said first and second horizontally disposed holes in said first tubular member having cooperatively disposed sections deviating from a circular section, the regions of said first tubular member adjacent said first and second holes being separated from the outer surface of said second tubular member, whereby said pin may be inserted into either of said first and second holes and rotated so as to be retained by a section of said pin between said first and second tubular members.

Claim 8

A jack stand comprising: a first generally upright tubular member, said first tubular member having means for defining a base for resting on a horizontal surface, and having first and second horizontally disposed through holes adjacent the upper end thereof and through opposite sides of said first tubular member; a second generally upright tubular member coaxial with and slideable within said first tubular member, said second tubular member having adjacent the upper end thereof means for engaging and supporting a part of an automobile, said second tubular member further having a plurality of horizontally disposed through holes, each at one of a plurality of elevations and each generally alignable with said through hole in said first tubular member; a pin for extending through said horizontally disposed hole in said first tubular member and any of said horizontally disposed holes in said second tubular member to retain said first and second tubular members in a selected relative axial disposition; and at least one region of said pin and each of said first and second horizontally disposed holes in said first tubular member having cooperatively disposed sections deviating from a circular section, the regions of said first tubular member adjacent said first and second holes being separated from the outer surface of said second tubular member, whereby said pin may be inserted into either of said first and second holes and rotated so as to be retained by a section of said pin between said first and second tubular members.