Lifting apparatus for concrete structures

• US 6,023,891 A
• Filed: 05/02/1997
• Issued: 02/15/2000
• Est. Priority Date: 05/02/1997
• Status: Expired due to Fees

• Current Assignee: J. P. Gianotti, Kelly Robertson
• Original Assignee: J. P. Gianotti, Kelly Robertson
• Inventors: Gianotti, J. P., Robertson, Kelly
• Primary Examiner(s): SMITH, CREIGHTON H
• Application Number:
  US08/850,810
• Time in Patent Office: 1,019 Days
• Field of Search: 52/122.1, 52/125.4, 52/125.5, 52/124.2, 52/698, 52/699, 52/701, 411/903, 411/509, 411/508, 411/510, 411/482
• US Class Current: 52/125.4
• CPC Class Codes: B66F 9/12 Platforms; Forks; Other load supporting or gripping members
• CPC Class Codes: Y10S 411/903 Resinous exterior

Abstract

A lifting apparatus for use in lifting a concrete or other structure including a first member for inserting into a wall of the structure and a second member for fitting onto a forklift and engaging the first member. The first member includes an elongate member encased in a polymeric material. One or more resilient radial fins extend from the first member, and are angled away from the first end of the first member. A pair of raised shoulders define a circumferential channel near the second end. The first member is installed in the structure by being driven into a preformed hole in the structure. The second member includes a hollow body for sliding onto a forklift tine, and a side wall having at least one vertical recess for receiving the circumferential channel of the first member.

Claims

1. A lifting apparatus comprising:

a unitary first member including a body having an elongate member encased in a polymeric material, the body having first and second ends, and a first intermediate portion therebetween;

at least one radial flange extending outwardly from the first intermediate body portion;

surfaces defining a circumferential channel adjacent the second body end; and

,

a second member having a hollow body and a side wall, the side wall including surfaces defining at least on recess adapted for supportingly engaging the first member.

2. A lifting apparatus according to claim 1 wherein the at least one radial flange is a resilient flange adapted for sliding into and interlockingly engaging a bore in a concrete member.

3. A lifting apparatus according to claim 1 wherein the surfaces defining a circumferential channel include a pair of spaced apart raised channels.

4. The lifting apparatus of claim 1 wherein the at least one recess is adapted for engaging the circumferential channel of the first member.