Hoist device

A hoist device for fixed engagement to a threaded bore on an outer surface of a load member is provided. The hoist device comprises a load engaging stud with a force supporting head, a cylindrical body portion with a lower annular bearing shoulder and a threaded shank depending from the annular shoulder of the body portion. A base member having a body portion with a central passage through the base member and allowing a free swivel engagement of the base member with the load engaging stud is provided. The central passage of the base member, having an upper recess for capturing the force supporting head and an upper annular shoulder for transmitting a force from the base member to the supporting head when the base member is pulled from the load member is also provided. A hoist ring is secured between the support member and the base member while allowing the base member to swivel around the stud. A slot in one of the members captures the hoist ring while allowing the hoist ring to pivot in the slot. The stud includes a tool driving portion and a force supporting head, the tool driving portion includes the tool engaging portion and the stud and access openings in one of the members registered with the tool engaging portion when one of the members and the stud are in a given relative angular position. In such position, an elongated tool can be extended through the opening into the tool engaging portion to rotate the stud and members in unison until the lower shoulder engages the surface of the load member.

Having thus described the invention, it is claimed:

1. A hoist device for fixed engagement to a threaded bore on an outer surface of a load member, said hoist device comprising: a load engaging stud with a force supporting head; a cylindrical body portion with a lower, annular bearing shoulder and a threaded shank depending from said annular shoulder of said body portion; a base member having a body portion with a central passage through said base member and allowing a free swivel engagement of said base member with said load engaging stud when said stud is fixed to said load member by threading said shank through said central passage into said load member bore until said lower bearing shoulder is drawn against said outer surface of said load member, said central passage of said base member having an upper recess for capturing said force supporting head and an upper annular shoulder means for transmitting a force from said base member to said supporting head when said base member is pulled from said load member; a hoist ring having an upper bight portion and a lower generally cylindrical connecting portion; a hoist ring support member with a body portion; means for fixedly securing said support member to said base member while allowing said base member to swivel around said stud; and, a slot in one of said members between said body portion of said support member and the body portion of said base member for capturing said connecting portion of said hoist ring between said base member and said support member while allowing said hoist ring to pivot in said slot, said stud including a tool driving portion in said force supporting head, said tool driving portion including a tool engaging portion in said stud and at least one access opening in one of said members registered with said tool engaging portion when said one of said members and said stud are in a given relative angular position whereby an elongated tool can be extended through said opening into said tool engaging portion to rotate said stud and members in unison until said lower shoulder engages said surface of said load member.

2. The hoist device of claim 1, wherein said at least one access opening is in said support member.

3. The hoist device of claim 2, wherein said tool engaging portion includes at least one hole in said force supporting head.

4. The hoist device of claim 3, wherein said force supporting head includes two holes and said support member includes two access openings.

5. The hoist device of claim 1, wherein said tool engaging portion includes at least one hole in said force supporting head.

6. The hoist device of claim 5, wherein said load engaging stud has a central axis extending between said force supporting head and said threaded shank, said at least one hole extending axially within said force supporting head.

7. The hoist device of claim 6, wherein said force supporting head includes two axially extending holes.

8. The hoist device of claim 1, wherein said slot is in said support member.

9. The hoist device of claim 1, wherein said hoist ring is formed from an elongated bar formed and welded into a ring.

10. The hoist device of claim 1, wherein said means for fixedly securing are separate bolts.

11. The hoist device of claim 10, wherein said bolts extend from said base member and are threaded into said support member.

12. The hoist device of claim 1, wherein said securing means includes a female threaded portion on one of said members and a matching male threaded portion on the other of said members whereby said members are secured by rotating one with respect to the other.

13. The hoist device of claim 1, wherein said upper recess has a height greater than the height of said force supporting head by a first given amount so that said support member and said base member can freely rotate about said head when said support member is secured to said base member.

14. The hoist device of claim 13, wherein said lower bearing shoulder extends below said base member a second given amount when said upper annular shoulder engages said force supporting head.

15. The hoist device of claim 1, wherein said lower bearing shoulder extends below said base member a second given amount when said upper annular shoulder engages said force supporting head.

16. A hoist device for fixed engagement to a threaded bore on an outer surface of a load member, said hoist device comprising: a load engaging stud with a force supporting head; a cylindrical body portion with a lower, annular bearing shoulder and a threaded shank depending from said annular shoulder of said body portion; a base member having a body portion with a central passage through said base member and allowing a free swivel engagement of said base member with said load engaging stud when said stud is fixed to said load member, said lower bearing shoulder for being drawn against said outer surface of said load member; and a hoist ring having an upper bight portion and a lower connecting portion, said connecting portion fixedly secured to said base member while allowing said base member to swivel around said stud, said stud including a tool driving portion in said force supporting head, said tool driving portion including at least one tool engaging portion in said stud whereby an elongated tool can be extended into said tool engaging portion to rotate said stud until said lower shoulder engages said surface of said load member.

17. A hoist device for fixed engagement to a threaded bore on an outer surface of a load member, said hoist device comprising: a load engaging stud with a force supporting head; a cylindrical body portion with a lower, annular bearing shoulder and a threaded shank depending from said annular shoulder of said body portion; a base member having a body portion with a central passage through said base member and allowing a free swivel engagement of said base member with said load engaging stud when said stud is fixed to said load member by threading said shank through said central passage into said load member bore until said lower bearing shoulder is drawn against said outer surface of said load member, said central passage of said base member having an upper recess for capturing said force supporting head and an upper annular shoulder means for transmitting a force from said base member to said supporting head when said base member is pulled from said load member; a hoist ring having an upper bight portion and a lower generally cylindrical connecting portion; a hoist ring support member with a body portion; means for fixedly securing said support member to said base member while allowing said base member to swivel around said stud; and, a slot in one of said members between said body portion of said support member and the body portion of said base member for capturing said connecting portion of said hoist ring between said base member and said support member while allowing said hoist ring to pivot in said slot, said stud including a tool driving portion in said force supporting head, said tool driving portion including a tool engaging portion in said stud and at least one access opening in one of said support members registered with said tool engaging portion when said support member and stud are in a given relative angular position whereby an elongated tool can be extended through said opening into said tool engaging portion to rotate said stud and support member in unison until said lower shoulder engages said surface of said load member.

18. A hoist device for fixed engagement to a threaded bore on an outer surface of a load member, said hoist device comprising: a load engaging stud with a force supporting head; a cylindrical body portion with a lower, annular bearing shoulder and a threaded shank depending from said annular shoulder of said body portion; a base member having a body portion with a central passage through said base member and allowing a free swivel engagement of said base member with said load engaging stud when said stud is fixed to said load member, said lower bearing shoulder for being drawn against said outer surface of said load member; and a hoist ring having an upper bight portion and a lower connecting portion, said connecting portion fixedly secured to said base member while allowing said base member to swivel around said stud, said stud including a tool driving portion in said force supporting head, said tool driving portion including a tool engaging portion in said stud whereby an elongated tool can be extended into said tool engaging portion to rotate said stud until said lower shoulder engages said surface of said load member.