1975-08-18
1976-12-07
Song, Robert R.
Cutlery
64 23, F16C 1700
Patent
active
039959147
ABSTRACT:
A rod and guide assembly which permits free axial rod movement and does not allow the rod to rotate excessively in the rod guide. The rod is a cast member having a main body of circular cross section and a key integrally formed therewith and extending from and axially along one side of the main body. The parting line plane of the rod passes through the rod axis and substantially at right angles to a plane passing through the center of the key and the rod main body axis. The guide member has a guide aperture through which the rod extends. The aperture is defined by circumferentially spaced axially extending wall sections having circumferentially spaced and radially extending recesses therebetween. Two circumferentially opposite recesses have an axially extending plane passing therethrough and through the aperture axis. This plane is perpendicular to a similarly extending plane passing through at least one other such recess. At least portions of the wall sections circumferentially intermediate the recesses define bearing and guide surfaces for the rod main body and permit free axial rod movement in the aperture. The rod key is received in a recess lying in the plane which is perpendicular to the two circumferentially opposite recesses to position the rod in a circumferentially oriented position relative to the rod guide member. The rod key clears the recess walls for free axial rod movement, but with attempted rotation of the rod the key will engage one or the other of the side walls of the recess in which it is located to prevent any substantial rotational movement to maintain the circumferentially oriented position of the rod relative to the rod guide member. The plane of the rod parting line passes through the two circumferentially opposite recesses so that any flash or parting line mismatch on the main body of the rod lies in these recesses and cannot contact the guide member. This minimizes the possibility of the rod sticking or jamming due to parting line mismatch or flash interference.
REFERENCES:
patent: 3805552 (1974-04-01), Heald
Schardt Michael M.
Smith John T.
Church Gene A.
General Motors Corporation
McGraw D. D.
Song Robert R.
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