JOHN EDWARD MESSENGER
Engineers in North Newton, PA
License number
Pennsylvania PE034784E
Category
Engineers
Type
Professional Engineer
Address
Address
North Newton, PA 17241
Professional information
System For Frame Leveling And Stabilizing A Forklift
US Patent:
6196586, Mar 6, 2001
Filed:
Aug 4, 1999
Appl. No.:
9/366572
Inventors:
John E. Messenger - Newville PA
Assignee:
Ingersoll-Rand Company - Woodcliff Lake NJ
International Classification:
B60S 902
US Classification:
2807631
Abstract:
A system is provided for leveling and stabilizing a forklift vehicle having a frame and at least one and preferably two axles pivotally connected with the frame. The system includes a frame leveler device including a hydraulic cylinder extending between the frame and the front axle and configured to move the frame with respect to the axle. A stabilizer device is mounted to the frame and includes a pair of arms and two stabilizer hydraulic cylinders. Each stabilizer cylinder has a piston with a rod connected with a separate one of the arms and a base chamber on one side of the piston. Further, a fluid exchange line extends between the base chambers of the two stabilizer cylinders and an exchange valve controls flow through the exchange line. A controller is connected with the leveler cylinder and with the exchange valve and is configured to open the valve when the leveler cylinder displaces the frame with respect to the axle such that the stabilizer cylinders are each retractable and extendable during movement of the frame. More specifically, movement of the frame with respect to the axle when the arm portions contact the ground surface causes hydraulic fluid to between the stabilizer cylinders such that the piston rod of one cylinder retracts and the rod of the other cylinder extends while the stabilizer arms remain substantially stationary.
Lubricant Impregnated Wear Pads For Extendable Booms On Material Handling Devices
US Patent:
6109394, Aug 29, 2000
Filed:
Nov 17, 1998
Appl. No.:
9/193533
Inventors:
John E. Messenger - Newville PA
Assignee:
Ingersoll-Rand Company - Woodcliff Lake NJ
International Classification:
F16N 1500
US Classification:
184 99
Abstract:
An extendable boom for a material handling device includes a first boom section for connection to a support frame, the first boom section having a plurality of first structural members. A second boom section is slidable with respect to the first boom section, for supporting a load to be moved and carried. The second boom section has a plurality of second structural members. Wear pads are positioned between the first and second structural members, the wear pads being a cast polyamide material with oil impregnated therein and subjected to dynamic compressive loading condition characterized by a PV value between 26,400 and 32,000. A method to manufacture the extendable boom is also claimed.