Richard A Craig

US Patent:

6588584, Jul 8, 2003

Filed:

Apr 16, 2001

Appl. No.:

09/835682

Inventors:

Richard L. Craig - Lisbon OH
Jason R. Craig - Lisbon OH
Charles W. Bell - Lisbon OH

Assignee:

R. L. Craig, Inc. - Lisbon OH

International Classification:

B65G 2100

US Classification:

1988601, 1988361, 198837

Abstract:

A clamping assembly for mounting an apparatus on a side rail of a conveyor has one or a pair of parallelepiped shaped blocks, each having a tenon extending outwardly from one planar side thereof. The tenon has a shape similar to one-half of a dovetail shaped groove, one or two such grooves are formed in one of the side rails of a conveyor. A pair of fasteners clamp each of the blocks against the outer surface of the side rail with the tenons thereof extending into a respective dovetail groove and engaging one-half of the groove. The outer width of the tenon is less then the entrance opening of the dovetail groove enabling the tenon to be placed directly into the groove without being slid inwardly from an end opening.

US Patent:

20080054238, Mar 6, 2008

Filed:

Sep 1, 2006

Appl. No.:

11/515253

Inventors:

Richard L. Craig - Lisbon OH, US
Jason R. Craig - Lisbon OH, US
Charles W. Bell - Lisbon OH, US

Assignee:

R.L. Craig, Inc. - Lisbon OH

International Classification:

B66F 3/12

US Classification:

254 7 R

Abstract:

A hoist apparatus for positioning and supporting a load includes an elongated hollow tubular post extruded of aluminum and formed with a plurality of substantially circular holes formed in certain of the walls adjacent a hollow interior of the post. The holes extend throughout the length of the post and have only a short end section thereof adjacent the end edges of the post tapped to provide internal threads for receiving threaded fasteners for mounting the post on a support base and for securing a drive screw end cap plate on the top of the post.

US Patent:

49712926, Nov 20, 1990

Filed:

Aug 23, 1989

Appl. No.:

7/397675

Inventors:

Richard L. Craig - Lisbon OH

Assignee:

Craig Tool & Machine, Inc. - Lisbon OH

International Classification:

B60P 110

US Classification:

254 7R

Abstract:

A hoist apparatus for lifting a load includes an elongated, hollow tubular post formed with an elongated slot, and a T-shaped base for supporting the post in an upright position. The base has a plurality of lockable casters mounted thereon for portability of the hoist. A ball screw is rotatably suspended within the post and a follower nut is movably engaged with the ball screw for linear movement therealong, in response to manual rotation of the ball screw by a handwheel which is operatively connected thereto. A cylindrical-shaped carriage is engaged by the follower nut within the post for linear movement therewith along the ball screw. A plurality of crowned rollers are rotatably mounted adjacent to each of the ends of the carriage in a generally circular spaced arrangement, whereby each of the rollers rotatably arcuately contacts the curved interior surface of the tubular post for slideably engaging the carriage with the post for smooth movement of the carriage within the post. A stud is mounted on the carriage and extends transversely through and outwardly of the elongated slot of the post for retaining a lifted load thereon. A spring-biased safety detent is engageable with the handwheel in its normally biased position to prevent rotation of the handwheel and the ball screw, and corresponding movement of the carriage under the weight of a load, so that a locking clamp can be manually clamped to the post to lock the carriage, stud and the load carried thereon at a predetermined elevation.

US Patent:

55448607, Aug 13, 1996

Filed:

Nov 7, 1994

Appl. No.:

8/334945

Inventors:

Richard L. Craig - Lisbon OH

Assignee:

R. L. Craig, Inc. - Lisbon OH

International Classification:

B60P 110

US Classification:

254 7R

Abstract:

A hoist apparatus for accurately positioning and supporting a load above a production line, which includes an elongated post having a pair of sides with arcuate guide channels formed thereon, and a front face having a recess formed therein. A carriage is supported on the elongated post and a drive screw engages the carriage such that rotation of the drive screw axially translates the carriage in a direction parallel to the longitudinal axis of the post. A base supports the elongated post and includes an interior cross section complementary-shaped to the exterior of the post's exterior surface. In the first embodiment, a plurality of casters are carried by the carriage and rotatably engage the guide channels. The casters are each rotatably mounted on an eccectric cam shaft such that rotation of the cam shaft axially translates the casters toward or away from the guide channel. Such rotation allows the casters to be accurately positioned relative to the guide channel.