Power steering gear

Claim 2

In combination, A. a bolt having a pair of screw threaded portions spaced axially by an unthreaded shank sealing portion, the diameter of the unthreaded sealing portion being approximately equal to the pitch diameters of said threaded portions, B. a pair of relatively rotatable nut members, 1. each having a threaded bolt hole mating with one of each of said threaded bolt portions, 2. the threads of said members being truncated and the axial dimensions of said members being determined to enable movement thereof axially along said unthreaded sealing portion into abutment with each other at axially adjusted positions upon screwing thereof toward each other on their respective threaded bolt portions, C. and means to effect a high pressure fluid seal around said bolt comprising 1. an elastic sealing ring closely fitting around said unthreaded sealing portion, 2. an annular endwise opening enlargement of the bolt hole at an end of one of said members for tightly receiving at least a portion of said sealing ring pressed therein, and 3. an annular face portion of the other of said members for pressing said ring into said enlargement in sealing engagement thereat with said one member and said unthreaded shank sealing portion when said members are screwed on their respective threaded portions into said abutment with each other.

Claim 3

In the combination according to claim 1, said one member at its bolt hole enlargement comprising an endwise enlarging cam for camming said ring radially inwardly toward said unthreaded shank portion upon tightening of said nut members into said abutment.

Claim 4

the threads of said members being truncated and the axial dimensions of said members being determined to enable movement thereof axially along said unthreaded sealing portion into abutment with each other at axially adjusted positions upon screwing thereof toward each other on their respective threaded bolt portions, C. and means to effect a high pressure fluid seal around said bolt comprising

Claim 5

the threads of said members being truncated and the axial dimensions of said members being determined to enable movement thereof axially along said unthreaded sealing portion into abutment with each other at axially adjusted positions upon screwing thereof toward each other on their respective threaded bolt portions, C. and means to effect a high pressure fluid seal around said bolt comprising

Claim 6

an annular endwise opening enlargement of the bolt hole at an end of one of said members for tightly receiving at least a portion of said sealing ring pressed therein, and

Claim 7

an annular endwise opening enlargement of the bolt hole at an end of one of said members for tightly receiving at least a portion of said sealing ring pressed therein, and

Claim 8

an annular face portion of the other of said members for pressing said ring into said enlargement in sealing engagement thereat with said one member and said unthreaded shank sealing portion when said members are screwed on their respective threaded portions into said abutment with each other.

Claim 9

an annular face portion of the other of said members for pressing said ring into said enlargement in sealing engagement thereat with said one member and said unthreaded shank sealing portion when said members are screwed on their respective threaded portions into said abutment with each other.

Claim 10

In the combination according to claim 1, said nut members comprising respectively a fluid containing housing for the pivotal sector gear of a power steering mechanism and a nut, a pivotal sector gear mounted in said housing for pivoting about an axis parallel to the axis of said bolt and for axial adjustable movemEnt, fluid pressure operated means for pivoting said sector gear within said housing, said bolt extending into said housing from one of its threaded portions located exteriorly of said housing and having its other threaded portion in screw threaded engagement with said housing, means interengaging said bolt within said housing with said sector gear to adjust the latter axially by screw action of said bolt, said nut being screwed on said one threaded portion against said housing to lock said bolt in axially adjusted position.

Claim 11

In the combination according to claim 3, said one member at its bolt hole enlargement comprising an endwise enlarging cam for camming said ring radially inwardly toward said unthreaded shank portion upon tightening of said nut members into said abutment.

Claim 12

In the method of providing a fluid seal around the shank of a bolt releasably locked in axially adjusted position within a bolt hole through the sidewall of a housing for high pressure fluid, the steps of A. forming screw threads on said bolt at locations spaced axially by an unthreaded shank portion of said bolt having a diameter approximately equal to the pitch diameter of said threads, B. providing a nut having a bolt hole for said bolt, C. providing truncated screw threads within the bolt holes of said housing and nut for intermeshing with said threaded portions respectively of said bolt and having minimum internal diameters dimensioned for passage of the unthreaded shank portion of said bolt through said bolt holes, D. providing an axially adjustable elastic sealing ring around said unthreaded shank portion, E. providing confronting portions on said housing and nut cooperating to compress said ring therebetween and force the latter into sealing engagement with said unthreaded shank portion and at least one of said confronting portions when said housing, bolt, ring, and nut are assembled with said nut screwed tightly against said housing, F. screwing said bolt into said housing to a an axially adjusted position with only part of said unthreaded shank portion projecting axially from said housing, and G. locking said bolt in the adjusted position by screwing said nut on said bolt tightly against said housing to force said ring into said sealing engagement.

Claim 13

In the method of providing a fluid seal around the shank of a bolt releasably locked in axially adjusted position within a bolt hole through the sidewall of a housing for high pressure fluid, the steps of A. forming screw threads on said bolt at locations spaced axially by an unthreaded shank portion of said bolt having a diameter approximately equal to the pitch diameter of said threads, B. providing a nut having a bolt hole for said bolt, C. providing truncated screw threads within the bolt holes of said housing and nut for intermeshing with said threaded portions respectively of said bolt and having minimum internal diameters dimensioned for passage of the unthreaded shank portion of said bolt through said bolt holes, D. providing an axially adjustable elastic sealing ring around said unthreaded shank portion, E. providing confronting portions on said housing and nut cooperating to compress said ring therebetween and force the latter into sealing engagement with said unthreaded shank portion and at least one of said confronting portions when said housing, bolt, ring, and nut are assembled with said nut screwed tightly against said housing, F. screwing said bolt into said housing to a an axially adjusted position with only part of said unthreaded shank portion projecting axially from said housing, and G. locking said bolt in the adjusted position by screwing said nut on said bolt tightly against said housing to force said ring into said sealing engagement.

Claim 14

In the method according to claim 5, hardening the spaced screw threads on said bolt.

Claim 15

In the method according to claim 5, said steep of providing truncated screw threads within said bolt holes of said housing and nut mating with said threaded portions respectively of said bolt, and thereafter removing the radially inner portions of the threads within said bolt holes to provide said minimum internal diameters.

Claim 16

In the method according to claim 7, hardening the spaced screw threads on said bolt.