Pipes and tubular conduits – Flexible – Braided – interlaced – knitted or woven
Reexamination Certificate
1999-01-26
2001-01-09
Hook, James (Department: 3752)
Pipes and tubular conduits
Flexible
Braided, interlaced, knitted or woven
C138S137000, C138S141000
Reexamination Certificate
active
06170532
ABSTRACT:
TECHNICAL FIELD
This invention relates to hoses that exhibit improved flexibility and improved abrasion resistance, and a cover with a low coefficient of friction for use in sewer cleaning applications.
BACKGROUND ART
The change in sewer construction materials across the world has required a new type of cleaning hose. Whether the sewer walls are lined with concrete or tiles, one hose must have the capability of cleaning all types of sewers. To date, all rubber and all thermoplastic hoses have been used to clean sewers. A hybrid hose construction has been developed that employs the use of a thermoplastic cover in conjunction with a rubber inner tube and backing layer. The tough, thermoplastic cover provides the necessary abrasion resistance and low coefficient of friction required for easy hose routing in sewer environments. The existence of rubber provides for flexibility and kink resistance. This hybrid hose construction also provides the unique combination of properties that all rubber and all thermoplastic hoses do not.
DISCLOSURE OF INVENTION
I have developed a new sewer cleaning hose. My new rubber hose concentrates on the ability to improve flexibility and cover resistance to cutting and abrasion while providing a six inch minimum bend radius for a 1 inch I.D. hose. The reduction in bend radius allows sewer trucks to have a smaller hose reel placed at the front of a vehicle increasing the line of sight. Fitting retention, kink resistance, reduction in overall weight, internal and external fluid resistance, and ozone resistance also have been addressed. What makes this hose design unique is the low friction the hose cover offers under operation. No other sewer hose offers the easy capability of routing through sewer applications like the proposed new hose design. Also, the use of one reinforcement braid, instead of the usual two textile bands, results in the further reduction in overall envelope weight and facilitates the use of smaller hose reels. The use of Kevlar® fibers further reduces the extent of volumetric or cubical expansion the hose experiences under application.
Generally, my hose comprises an inner tube of an acrylonitrile rubber layer, a reinforcing layer adjacent the inner tube, an EPDM rubber backing layer adjacent the reinforcing layer and a UHMW plastic outer cover adjacent the EPDM backing layer.
REFERENCES:
patent: 4091843 (1978-05-01), Mikes et al.
patent: 4482592 (1984-11-01), Kramer
patent: 4559095 (1985-12-01), Babbin
patent: 4842024 (1989-06-01), Palinchak
patent: 4870995 (1989-10-01), Igarashi et al.
patent: 4905735 (1990-03-01), Akiyoshi
patent: 4923550 (1990-05-01), Kramer
patent: 4998564 (1991-03-01), Igarashi et al.
patent: 5016675 (1991-05-01), Igarashi et al.
patent: 5093166 (1992-03-01), Nishimura
patent: 5145628 (1992-09-01), Karg et al.
patent: 5264262 (1993-11-01), Igarashi
patent: 5316046 (1994-05-01), Igarashi et al.
patent: 5348779 (1994-09-01), Igarashi
patent: 5462091 (1995-10-01), Saupe
patent: 6029712 (2000-02-01), Dougherty
Aeroquip Corporation
Emch, Schaffer, Schaub & Porcello & Co., L.P.A.
Hook James
LandOfFree
Flexible hose does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Flexible hose, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Flexible hose will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2520464