Patent ID: 8360478
Filing Date: 2013-01-29
Classification: F16D,F16L,Y10T

Abstract:
1. A hose fitting assembly for engaging a flexible high-pressure hydraulic hose having a terminal end, the hose fitting assembly comprising: (a) an end fitting having an insertion stem concentric with a longitudinal axis, the insertion stem extending along a length of the longitudinal axis, a length of the insertion stem sized to be disposed within the hose, the end fitting having a through bore and external trapping threads extending along a fixed length of the longitudinal axis, the end fitting further including an external stop spaced along the longitudinal axis from the external trapping threads by a non-threaded capturing gap; (b) a clamping sleeve having a leading end and a trailing end, the clamping sleeve including a central passageway extending from the leading end to the trailing end, the central passageway sized to receive a length of the hose at the leading end, the central passageway defining a hose stop and internal trapped threads extending along a given length of the longitudinal axis, the central passageway at the trailing end sized to receive the end fitting, the clamping sleeve including (i) external compression threads extending along a predetermined length of the longitudinal axis, (ii) an external fitting stop extending transversely from the longitudinal axis, (iii) a circumferentially compressible section, the external compression threads spaced from the external fitting stop by a free distance, the free distance being non-threaded, and (iv) a locking flange intermediate the external fitting stop and the free distance; and (c) a swaging collar having a lead end and a trail end, the swaging collar including a central passage extending between the lead end and the trail end, the central passage having (i) internal compressive threads sized to engage the external compression threads and (ii) a taper, the swaging collar including a clamping section, the central passage sized to receive a portion of the clamping sleeve, the internal compressive threads extending along a set length of the longitudinal axis and spaced from the taper along the longitudinal axis by a non-engaging gap, the non-engaging gap being non-threaded, the lead end configured to abut the external fitting stop in operable engagement of the swaging collar and the clamping sleeve, the swaging collar having a locking groove intermediate the lead end and the internal compressive threads; the capturing gap extending a sufficient length along the longitudinal axis to non-threadingly receive all of the internal trapped threads to allow free rotation of the clamping sleeve relative to the end fitting prior to operable engagement of the clamping sleeve and swaging collar; wherein the insertion stem is sized to extend along the longitudinal axis to underlie the circumferentially compressible section of the clamping sleeve; wherein the clamping sleeve is deformed in response to operable threaded engagement of the clamping sleeve and the swaging collar; wherein when the lead end of the swaging collar abuts the external fitting stop, the locking flange engages and seats into the locking groove to resist non-destructive separation of the end fitting from the clamping sleeve; and wherein threaded engagement of the internal compressive threads and the external compression threads after the lead end of the swaging collar abuts the external fitting stop imparts a deformation to at least one of the internal compressive threads and the external compression threads to resist non-destructive separation of the swaging collar from the clamping sleeve and preclude reuse.