US 7,472,503 B2
Attachment system
Patrick Gerard Maher, Kalgoorlie (Australia)
Assigned to Sandvik Shark Pty Ltd., Eagle Farm (Australia)
Appl. No. 10/509,016
PCT Filed Mar. 26, 2003, PCT No. PCT/AU03/00362
§ 371(c)(1), (2), (4) Date Apr. 07, 2005,
PCT Pub. No. WO03/080946, PCT Pub. Date Oct. 02, 2003.
Claims priority of application No. PS1348 (AU), filed on Mar. 26, 2002; and application No. 2002950166 (AU), filed on Jul. 12, 2002.
Prior Publication US 2005/0229441 A1, Oct. 20, 2005
Int. Cl. E02F 9/28 (2006.01)
U.S. Cl. 37—455  [37/458; 37/452; 403/374.4] 20 Claims
OG exemplary drawing
 
1. An attachment system for connecting a lip plate of a digging device to a ground engaging tool, comprising:
a lug mounted on the lip plate and including a rear face;
an engaging recess arranged in a rearwardly extending attachment portion of the ground engaging tool, extending inwardly of the attachment portion from a rear surface thereof, the engaging recess being arranged to received the lug;
a lug engaging member insertable into the engaging recess from the rear surface of the attachment portion, the lug engaging member arranged to engage the rear face of the lug;
a clamping member arranged to be received longitudinally in the engaging recess, the clamping member comprising a substantially cylindrical chamber housing the lug engaging member;
a resilient member coupled to the lug engaging member opposite the lug; and a compressive member at least partially insertable into the engaging recess from the rear surface of the attachment portion to apply a compressive force to the resilient member to engage the lug engaging member with the rear face of the lug and restrain a longitudinal movement of the lug relative to the ground engaging tool.