Excavating – Ditch filler
Patent
1978-03-27
1980-03-11
Crowder, Clifford D.
Excavating
Ditch filler
85 83, 403379, E02F 928
Patent
active
041920899
ABSTRACT:
A retainer for the releaseable securing of a tooth tip of a digger tooth on a holder, the tooth tip being provided with a sleeve, and the holder engaging in the sleeve and being rigidly connected with the digger edge of the shovel bucket. The retainer is arranged in a holder opening extending parallel to the cutter edge of the tooth tip and in the longitudinal center line of the tooth, the retainer being made of two metal formed parts and a rubber element arranged between the two metal formed parts, the rubber element being stressed on compression. The retainer in the installed assembled condition on one side comes into contact on the surfaces of the tooth tip openings which face toward the cutter edge and on the other side comes into engagement on the surfaces of a recess arranged in the holder which face away from the cutter edge. The metal formed part which faces toward the cutter edge and which is open on the longitudinal sides and has stays on the face sides is disposed floating between the legs of the other U-shaped metal formed part. The latter being open on the longitudinal sides, facing the digging edge of the shovel bucket. The rubber element which connects the two metal formed parts is protected against a stress exceeding its fatigue strength in that the width of the gap between the face surface of the leg of that metal formed part which faces the digging edge of the shovel bucket and the inner wall of the holder or sleeve opening is smaller than the allowable compression of the spring system or the ride clearance which is permitted for maintaining the endurance or fatigue strength of the rubber element. The metal formed part which faces the cutter edge is provided on its outer surface with cams which serve for securing the retainer against falling out during stressing of the tooth tip.
REFERENCES:
patent: 2798403 (1957-07-01), Launder
patent: 3511126 (1970-05-01), Watts
patent: 3520224 (1970-07-01), Hemsley et al.
patent: 3685178 (1972-08-01), Ratkowski
patent: 3894349 (1975-07-01), Moreau
Crowder Clifford D.
Farber Martin A.
O & K Orenstein & Koppel Aktiengesellschaft
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