Positive keeper means for pins of earthworking tips

Details Positive keeper means for pins of earthworking tips Positive keeper means for pins of earthworking tips

1987-09-30

1989-04-25

Burr, Edgar S.

Excavating

Ditch filler

37141T, E02F 0928

Patent

active

048234869

ABSTRACT:
The invention relates to a metallic washer and a split resilient retaining ring for retaining pins of earthworking tips. Positive retention of earthworking tips on their adapters by their retaining pins during its work cycle is extremely important from an operational as well as a cost standpoint. The loss of the tips materially affect productions in addition to the time consuming expense of replacement or repair of the components. Not only must the tips be adequately retained, they must be capable of quick removal for replacement purposes. The washer having a frusto-conical side surface and an inside surface defining a bore and a groove opening into the bore is captured in a recess between a nose of the adapter and a sidewall of the tip. The ring having a cross-section with a predetermined radial thickness and is disposed in locking engagement in a groove on the pin and the groove of the washer. The ring, in use, is operative in conjunction with the grooves in the pin and washer to prohibit disassembly of the pin from the washer without an external force being applied to the pin sufficient to shear the ring or fracture of the washer with the side walls of the washer constructed to effectively concentrate the external force close to the interface of the grooves.

REFERENCES:
patent: 1397101 (1921-11-01), Kelley
patent: 3466073 (1969-09-01), Pohle
patent: 3535977 (1970-10-01), Baumgarten
patent: 3624827 (1971-11-01), Liess
patent: 3952433 (1976-04-01), Heinold
patent: 3959901 (1976-06-01), Klett
patent: 3990162 (1976-11-01), Heinold
patent: 4405251 (1983-09-01), Kolchinski
patent: 4447750 (1984-05-01), Howlett et al.

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