Patent ID: RE41260

Claim:
A combination comprising: a first object including a retaining groove in an end thereof; a second object including a receiving compartment for removably receiving said end of said first object, said receiving compartment having a plurality of corners, an annular groove being defined in an inner periphery defining said receiving compartment; and a resilient retainer ring received in the annular groove, said retainer ring including at least two pressing sections and at least one engaging section, with said at least two pressing sections separated by said at least one engaging section, wherein both of said at least two pressing sections simultaneously press against a bottom wall defining said annular groove of said second object and are located outside of the retaining groove, with said at least two pressing sections holding said at least one engaging section away from the bottom wall defining said annular groove, wherein said at least one engaging section is exposed to at least one of said corners of said receiving compartment by being held by said at least two pressing sections simultaneously pressing against the annular groove such that said at least one engaging section has at least a portion engaged in said retaining groove when said end of said first object is received in said receiving compartment.