Collar nut and thrust ring

Patent · Tue Jan 01 00:00:00 EST 1991

OSTI ID:867934

Lowery, Guy B ^[1]

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1. Aiken, SC

A collar nut comprises a hollow cylinder having fine interior threads at one end for threadably engaging a pump mechanical seal assembly and an inwardly depending flange at the other end. The flange has an enlarged portion with a groove for receiving an O-ring for sealing against the intrusion of pumpage from the exterior. The enlarged portion engages a thrust ring about the pump shaft for crushing a hard O-ring, such as a graphite O-ring. The hard O-ring seals the interior of the mechanical seal assembly and pump housing against the loss of lubricants or leakage of pumpage. The fine threads of the hollow cylinder provide the mechanical advantage for crushing the hard O-ring evenly and easily with a hand tool from the side of the collar nut rather than by tightening a plurality of bolts from the end and streamlines the exterior surface of the mechanical seal. The collar nut avoids the spatial requirements of bolt heads at the end of a seal and associated bolt head turbulence.

• Research Organization: E I DUPONT DE NEMOURS & CO INC
• DOE Contract Number: AC09-76SR00001
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 5039114
• OSTI ID: 867934
• Country of Publication: United States
• Language: English

Related Subjects

collar
nut
thrust
comprises
hollow
cylinder
fine
interior
threads
threadably
engaging
pump
mechanical
seal
assembly
inwardly
depending
flange
enlarged
portion
groove
receiving
o-ring
sealing
intrusion
pumpage
exterior
engages
shaft
crushing
hard
graphite
seals
housing
loss
lubricants
leakage
provide
advantage
easily
hand
tool
tightening
plurality
bolts
streamlines
surface
avoids
spatial
requirements
bolt
heads
associated
head
turbulence
mechanical advantage
hollow cylinder
pump shaft
seal assembly
exterior surface
o-ring seal
pump housing
mechanical seal
o-ring seals
enlarged portion
collar nut
threadably engaging
hand tool
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