End cap locking means for hydraulic cylinders and method

Claim 2

A hydraulic cylinder disposed on a longitudinal axis thereof comprising a housing, an end cap, circumferential thread means threadably mounting said end cap on an end of said housing, locking means operativelyy connected to said cylinder for indirectly applying a force to thread portions of said thread means to create a substantial interference fit thereat and force transmitting means, comprising a tubular member positioned between said locking means and said thread portions, for transmitting said force from said locking means to said thread portions, said thread portions being diametrically opposed to said locking means and said locking means being disposed on said cylinder to apply said force radially inwardly towards said axis and through said tubular member to said thread portions.

Claim 3

The invention of claim 1 wherein said hydraulic cylinder further comprises a piston and an attached rod reciprocally mounted in said housing, said rod extending through said end cap, and wherein said tubular member comprises a gland mounted within said housing and said end cap and having said rod reciprocally mounted therein.

Claim 4

The invention of claim 2 wherein said gland comprises a radial flange comprising a radially disposed surface abutting an end of said housing and a circumferentially disposed surface engaged by said locking means, said end cap having a radially disposed flange formed thereon abutting an end of said gland.

Claim 5

The invention of claim 1 wherein said locking means comprises a set screw threadably attached to said end cap.

Claim 6

A first member, a second member, circumferential thread means threadably mounting said first member on said second member to dispose them on a common, longitudinal axis, locking means connected to said first member for applying a force thereat, and force transmitting means comprising a tubular member positioned between said first and second members for transmitting the force applied by said locking means to thread portions of said thread means to create a substantial interference fit thereat, said thread portions being diametrically opposed to said locking means and said locking means being disposed on said first member to apply said force radially inwardly towards said axis and through said tubular member to said thread portions.

Claim 7

A first member, a second member, circumferential thread means threadably mounting said first member on said second member to dispose them on a common, longitudinal axis, locking means connected to said first member for applying a force thereat, and force transmitting means comprising a tubular member positioned between said first and second members for transmitting the force applied by said locking means to thread portions of said thread means to create a substantial interference fit thereat, said thread portions being diametrically opposed to said locking means and said locking means being disposed on said first member to apply said force radially inwardly towards said axis and through said tubular member to said thread portions.

Claim 8

A threaded assembly comprising: a pair of threaded member, individually including threaded portions interconnectible in screw threaded relation and having a circumferential surface separate from their respective threaded portions; a tubular force transmitting member having a first portion telescopically disposed with respect to said circumferential surface of one of said threaded members and having a second portion telescopically disposed with respect to said circumferential surface of the other of said threaded members; and lock means, comprising a set screw threadably supported in one of said threaded members and threadably adjustable into and out of frictional engagement with said force transmitting member, in radial force transmitting relationship between the said one of said threaded members and said first portion of said force transmitting member to urge said second portion thereof into frictional engagement with said circumferential surface of said other of said threaded members at a point substantially diametrically opposite to said lock means to prevent unintentional relative rotation between said threaded members.

Claim 9

A threaded assembly comprising: a pair of threaded member, individually including threaded portions interconnectible in screw threaded relation and having a circumferential surface separate from their respective threaded portions; a tubular force transmitting member having a first portion telescopically disposed with respect to said circumferential surface of one of said threaded members and having a second portion telescopically disposed with respect to said circumferential surface of the other of said threaded members; and lock means, comprising a set screw threadably supported in one of said threaded members and threadably adjustable into and out of frictional engagement with said force transmitting member, in radial force transmitting relationship between the said one of said threaded members and said first portion of said force transmitting member to urge said second portion thereof into frictional engagement with said circumferential surface of said other of said threaded members at a point substantially diametrically opposite to said lock means to prevent unintentional relative rotation between said threaded members.

Claim 10

The threaded assembly of claim 6 wherein the pair of threaded members constitute the cylinder and end cap of a hydraulic jack.

Claim 11

The threaded assembly of claim 7 wherein the force transmitting member constitutes a bearing and seal gland, mounted in said cylinder, and including an annular flange disposed in locked position between an end of said cylinder and said end cap.