초록 ▼

Conical jack stands that are used to hold up a motor vehicle (or other object) after it has been raised (e.g., by jacks). Rather than having legs like conventional jack stands, they have the shape of a hollow cone, with a circular bottom edge. The circular bottom edge gives them a larger bottom surf

Conical jack stands that are used to hold up a motor vehicle (or other object) after it has been raised (e.g., by jacks). Rather than having legs like conventional jack stands, they have the shape of a hollow cone, with a circular bottom edge. The circular bottom edge gives them a larger bottom surface area than the bottom ends of the legs of conventional jack stands, so that they will be less likely to sink into the ground or asphalt. There is a hole with internal screw threads in the top of each cone, into which a large bolt-like contacting member is screwed. The contacting members can be rotated to adjust the height of the jack stands. Their hollow conical shape makes it easy to stack the jack stands for storage. Four jack stands are stored in a square box, with one contacting member in each corner of the box.

대표청구항 ▼

1. A conical jack stand, comprising: a hollow main body having a conical shape with a circular bottom edge, and a part having a hole with internal screw threads at the top of the main body, said hollow main body having no other parts; anda threaded contacting member that can be screwed into the hole

1. A conical jack stand, comprising: a hollow main body having a conical shape with a circular bottom edge, and a part having a hole with internal screw threads at the top of the main body, said hollow main body having no other parts; anda threaded contacting member that can be screwed into the hole at the top of the main body, with the contacting member having a cylindrical head and a cylindrical shaft with external screw threads that engage the internal screw threads in the hole at the top of the main body, said contacting member having no other parts, and being readily removable from the hollow main body. 2. The conical jack stand according to claim 1, wherein the main body is made of aluminum. 3. The conical jack stand according to claim 1, wherein the main body is made of polyvinylchloride. 4. A combination of conical jack stands and a box, comprising: jack stands, each having a hollow main body having a conical shape with a circular bottom edge, and a part having a hole with internal screw threads at the top of the main body, with each main body having external and internal surfaces so configured that a plurality of main bodies can be stacked in a stable column, said main bodies having no other parts;a threaded contacting members that can be screwed into the holes at the tops of the main bodies of the jack stands, with the contacting members each having a cylindrical head and a cylindrical shaft with external screw threads that engage the internal screw threads in the hole at the top of the main bodies˜said contacting members having no other parts, and being readily removable from the hollow main body; anda square box, suitably dimensioned and configured that the main bodies of the jack stands may be stacked in the center of the box, with the contacting members in corners of the box. 5. The conical jack stand according to claim 1, wherein there is a groove in a top surface of the head of the contacting member, suitably dimensioned and configured to retain a jacking point of a vehicle. 6. The conical jack stand according to claim 5, wherein the groove in the top surface of the head of the contacting member is a V-shaped slot. 7. The conical jack stand according to claim 5, wherein the contacting member can be raised and lowered by rotating the contacting member, when the shaft of the contacting member is in the hole at the top of the main body. 8. The conical jack stand according to claim 5, wherein the main body has external and internal surfaces so configured that a plurality of main bodies can be stacked in a stable column. 9. The combination of conical jack stands and a box according to claim 4, wherein: the box is square;there are four jack stands;there are four contacting members; andwhen the jack stands are stacked in the center of the box, one of the contacting members will fit in each of the four corners of the box. 10. The combination of conical jack stands and a box according to claim 9, wherein: there is a groove in a top surface of the head of each of the contacting members, suitably dimensioned and configured to retain a jacking point of a vehicle. 11. The combination of conical jack stands and a box according to claim 10, wherein the groove in the top surface of the head of the contacting member is a V-shaped slot. 12. The conical jack stand according to claim 11, wherein each of the contacting members can be raised and lowered by rotating the contacting member, when the shaft of the contacting member is in the hole at the top of one of the main bodies. 13. The conical jack stand according to claim 12, wherein the main body is made of aluminum. 14. The conical jack stand according to claim 12, wherein the main body is made of polyvinylchloride. 15. A method of holding up a heavy object, comprising the steps of: raising the object;placing one or more jack stands under the object, with each of the jack stands having a hollow main body with a conical shape and a circular bottom edge, a part having a hole with internal screw threads at the top of the main body, said hollow main body having no other parts,and a threaded contacting member screwed into the hole at the top of the main body, with the contacting member having a cylindrical head and a cylindrical shaft with external screw threads that engage the internal screw threads in the hole at the top of the main body, said contacting member having no other parts, and being readily removable from the hollow main body; androtating the contacting member in a direction that causes its shaft to rise in the hole at the top of the main body, until a top surface of the head of the contacting member touches a bottom surface of the object. 16. The method of holding up a heavy object according to claim 15, wherein the heavy object is a motor vehicle. 17. The method of holding up a heavy object according to claim 16, wherein there is a groove in the top surface of the head of each of the contacting members, suitably dimensioned and configured to retain a jacking point of the motor vehicle. 18. The method of holding up a heavy object according to claim 17, wherein the groove in the top surface of the head of each of the contacting members is a V-shaped slot. 19. The method of holding up a heavy object according to claim 18, wherein each of the main bodies has external and internal surfaces so configured that a plurality of the main bodies can be stacked in a stable column. 20. The method of holding up a heavy object according to claim 19, wherein, when they are not in use, the jack stands are stored in a box, suitably dimensioned and configured that the main bodies of the jack stands may be stacked in the center of the box, with the contacting members in corners of the box.