Machine element or mechanism – Control lever and linkage systems – Hand operated
Patent
1992-02-24
1993-09-14
Braun, Leslie A.
Machine element or mechanism
Control lever and linkage systems
Hand operated
280775, B62D 118
Patent
active
052438740
ABSTRACT:
A pair of telescoping members include interconnecting end portions having a preselected configuration that facilitates the insertion of one tubular end portion into the other tubular end portion. The surface configuration of the interconnecting end portions is complementary so that the surfaces on an inner member engage the surfaces on the outer member to permit the transmission of rotation from one telescoping member to the other while permitting relative longitudinal movement therebetween. The inner and outer connecting members are spaced apart to form an annulus therebetween and provide a degree of tolerance greater than the tolerance provided with conventionally machined telescoping connecting end portions. The tolerance is taken up by the injection of a thermosetting resinous material at an elevated temperature into the annulus, completely filling the annulus. The thermosetting material when reduced to a lower operating or ambient temperature shrinks a preselected degree to form an elastomeric sleeve adhered to the inner surface of the outer connecting member. The cross-sectional area of the elastomeric sleeve is less than the cross-sectional area of the annulus between the connecting members. The difference in the cross-sectional area provides the connection of the telescoping members with a tolerance that is equal to the amount of shrinkage of the elastomeric sleeve. Thus, the provision of the elastomeric sleeve permits precise control of the tolerance between the telescoping members.
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Finney Lester G.
Wolfe Robert A.
Braun Leslie A.
Henn David E.
Pittsburgh Tubular Shafting, Inc.
Price, Jr,. Stanley J.
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