Hose coupling

Claim 2

A socket for a hose coupling of the type having one end for receiving a nipple and an internally threaded open end for receiving a wire reinforced hose with cover, wherein improvement of the internal threads consists essentially of: a first threaded portion with threads that are relatively sharp in cross section, the starting thread of which define a first hose cover cutting edge; a second threaded portion inward and discontinuously spaced from about one-fourth to about one thread from the first threaded portion to define an unthreaded space, the threads of the second portion starting with a thread portion of relatively sharp cross section that defines a second hose cover cutting edge and which changes to threads of relatively blunt cross section, the first and second thread portions of substantially the same pitch and the discontinuous space between the first and second thread portions defining a relief cavity.

Claim 3

A socket as set forth in claim 1 wherein the first and second threaded portions are on substantially the same helix.

Claim 4

the socket as claimed in claim 1 wherein the unthreaded space is at least generally one-fourth of a thread.

Claim 5

The socket as claimed in claim 1 wherein the first and second threaded portions are on two different helixes.

Claim 6

In a hose coupling of the type having a nipple and an internally threaded socket that defines an annular volume for gripping the end of a flexible hose that has a reinforcement disposed between a tube and cover, the improvement in the internal socket threads consists essentially of: a first internally threaded portion near one end of the socket with threads of relatively sharp cross section for cutting a first helical slit in the cover; a second internally threaded portion discontinuous and helically spaced from about one-fourth to about one thread from the first threaded portion to define an unthreaded space for receiving a distended portion of the cover, reinforcement and tube, the second threaded portion starting with a thread of relatively sharp cross section that change to threads of relatively blunt cross section, the sharp threads for cutting a second slit for receiving the blunt threads.

Claim 7

In a hose coupling of the type having a nipple and an internally threaded socket that defines an annular volume for gripping the end of a flexible hose that has a reinforcement disposed between a tube and cover, the improvement in the internal socket threads consists essentially of: a first internally threaded portion near one end of the socket with threads of relatively sharp cross section for cutting a first helical slit in the cover; a second internally threaded portion discontinuous and helically spaced from about one-fourth to about one thread from the first threaded portion to define an unthreaded space for receiving a distended portion of the cover, reinforcement and tube, the second threaded portion starting with a thread of relatively sharp cross section that change to threads of relatively blunt cross section, the sharp threads for cutting a second slit for receiving the blunt threads.

Claim 8

The hose coupling of claim 5 wherein the first and second threaded portions are substantially on the same helix.

Claim 9

In combination, a hose coupling and a flexible hose which has a reinforcement between a tube and cover, the coupling of the type having a nipple and an internally threaded socket that defines an annular volume for gripping the end of the hose, wherein the improvement consists essentially of: a first internally threaded portion of and near one end of the socket with threads of relatively sharp cross section for cutting a first helical slit in the cover, the threads of the first threaded portion disposed in part of the first helical slit; a second internally threaded portion of the socket discontinuous and helically spaced from about one-fourth to about one thread from the first threaded portion to define an unthreaded space that receives a distended portion of the cover, reinforcement and tube, the second threaded portion starting with a relatively sharp thread that changes to blunt threads, the sharp thread for cutting a second slit in the cover that receives the blunt threads, the reinforcement positioned tightly against the blunt threads; whereby, the first slit allows strain relief of the cover near the blunt threads and the distended portion of the tube, cover and reinforcement define an added coupling retention means.

Claim 10

In combination, a hose coupling and a flexible hose which has a reinforcement between a tube and cover, the coupling of the type having a nipple and an internally threaded socket that defines an annular volume for gripping the end of the hose, wherein the improvement consists essentially of: a first internally threaded portion of and near one end of the socket with threads of relatively sharp cross section for cutting a first helical slit in the cover, the threads of the first threaded portion disposed in part of the first helical slit; a second internally threaded portion of the socket discontinuous and helically spaced from about one-fourth to about one thread from the first threaded portion to define an unthreaded space that receives a distended portion of the cover, reinforcement and tube, the second threaded portion starting with a relatively sharp thread that changes to blunt threads, the sharp thread for cutting a second slit in the cover that receives the blunt threads, the reinforcement positioned tightly against the blunt threads; whereby, the first slit allows strain relief of the cover near the blunt threads and the distended portion of the tube, cover and reinforcement define an added coupling retention means.

Claim 11

The combination of claim 7 wherein the first and second threaded portions are substantially on the same helix.