A lifting apparatus may include a bolt assembly and a nut assembly. The bolt assembly may include a support plate, a bolt and a lifting eye attached to the support plate. The nut assembly may include a support plate, a nut and a handle attached to at least one of the support plate and the nut. A tet
A lifting apparatus may include a bolt assembly and a nut assembly. The bolt assembly may include a support plate, a bolt and a lifting eye attached to the support plate. The nut assembly may include a support plate, a nut and a handle attached to at least one of the support plate and the nut. A tether may also be included to connect the bolt assembly to the nut assembly.
대표청구항▼
1. A lift apparatus comprising: a bolt assembly, wherein the bolt assembly comprises a lifting eye configured for attachment to a lifting cable;a nut assembly comprising a nut configured for threaded attachment to the bolt assembly, the nut having a handle connected to the nut, the handle comprising
1. A lift apparatus comprising: a bolt assembly, wherein the bolt assembly comprises a lifting eye configured for attachment to a lifting cable;a nut assembly comprising a nut configured for threaded attachment to the bolt assembly, the nut having a handle connected to the nut, the handle comprising a narrow portion adjacent to the nut and a broad portion extending distally from the nut; anda tether for holding the nut assembly in connection to the bolt assembly, the tether having a loop sized to fit around the narrow portion of the handle, the loop being sufficiently small to resist passage of the broad portion of the handle through the loop. 2. The lift apparatus of claim 1, wherein the nut assembly further comprises a washer plate, and the bolt assembly further comprises a support plate, and wherein at least one of the nut and the handle are attached to the washer plate. 3. The lift apparatus of claim 2, wherein the loop of the tether is smaller in diameter than a length and width of the washer plate such that the loop is held between the washer plate and the broad portion of the handle. 4. The lift apparatus of claim 3, wherein the loop encircles the narrow portion of the handle and allows for rotation of handle and nut while the loop remains around the handle. 5. The lift apparatus of claim 4, wherein the nut is attached to the washer plate and wherein the washer plate and the handle extend radially outward beyond the nut so that a portion of the tether is held between the washer plate and the handle. 6. The lift apparatus of claim 1, wherein the bolt assembly comprises a base plate having a hole therein and a bolt extending through the hole in the base plate. 7. The lift apparatus of claim 6, wherein the bolt comprises a bolt head and further comprising a weld attaching the bolt head to the base plate. 8. The lift apparatus of claim 6, wherein the bolt has a head and wherein the lifting eye comprises a notch which fits over the head of the bolt to hold the head of the bolt between the lifting eye and the base plate. 9. The lift apparatus of claim 6, wherein the lifting eye comprises an arm and wherein the base plate comprises a channel and wherein the arm of the lifting eye nests in the channel of the base plate. 10. The lift apparatus of claim 6, wherein the lifting eye is welded to the base plate. 11. The lift apparatus of claim 1 wherein the bolt assembly has a lifting cable attached thereto and the tether is disposed about the lifting cable adjacent one end and about the handle of the nut assembly adjacent an opposing end so as to hold the nut assembly to the bolt assembly. 12. A lifting apparatus comprising: a bolt assembly including a bolt, a base plate, and a lifting eye connected to the bolt, the bolt having a head which is held between the lifting eye and the base plate to prevent removal of the bolt from the base plate; anda nut assembly comprising a nut and a handle, the handle being connected to the nut such that rotation of the handle rotates the nut. 13. The lifting apparatus of claim 12, further comprising a tether, the tether having a loop at one end for extending around the nut. 14. The lifting eye of claim 12, wherein the bolt and the lifting eye are welded to a base plate. 15. The lifting apparatus of claim 14, wherein the nut assembly comprises a washer plate and wherein the nut and the handle are welded to the washer plate. 16. The lifting apparatus of claim 14, wherein the handle includes a first, narrow portion adjacent the nut and a second, broader portion disposed away from the nut. 17. The lifting apparatus of claim 12, wherein the bolt assembly and the nut assembly are connected by a tether, the tether having a loop which extends around the first, narrow portion of the handle so as to allow rotation of the handle and the nut, the loop being sized to resist the second, broader portion of the handle being pulled therethrough, to thereby connect the nut assembly to the bolt assembly while allowing rotation of the nut assembly. 18. The lifting apparatus of claim 17, wherein the tether is movably attached to the bolt assembly and moveably attached to the handle. 19. The lift apparatus of claim 12, wherein the nut assembly further comprises a washer plate, and the bolt assembly further comprises a support plate, and wherein at least one of the nut and the handle are attached to the washer plate. 20. The lift apparatus of claim 12, wherein the bolt assembly comprises a base plate having a hole therein and a bolt extending through the hole in the base plate.
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이 특허에 인용된 특허 (9)
Glass James O. ; Glass Sam M., Apparatus and method for lifting piles.
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