Pipe insulation
United States Patent D839999

Woolward, Brian (Rayleigh, GB)
Caller, William (London, GB)
Application Number:
Publication Date:
Filing Date:
Irregular Insulation Ltd.
Primary Class:
International Classes:
(IPC1-7): 2301
Field of Search:
D23/259, D23/262-268, D23/269, 138/46, 138/121, 138/118, 138/155, 138/167, 138/173, 138/177, 138/32, 138/149, 138/156, 138/161, 285/121.1, 285/121.2, 285/124.1, 285/223, 285/226, 285/227
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US Patent References:
9765908Eccentric part of a pipe or cable lead-through2017-09-19Andersson
9016327Pipe assembly for district heating network2015-04-28Humalainen138/116
8555929Multi-hole insulation tube2013-10-15Ertel138/108
20080265564Multi-chamber vacuum insulated pipe systems and methods2008-10-30Thomas285/47
20040079431Pipe blanket to fit a variety of pipe diameters2004-04-29Kissell138/149
20020092577Pipe insulation jacket2002-07-18Vitoorapakorm138/149
20020079011Insulation cover2002-06-27Toth138/149
5123453Pipe insulation1992-06-23Robbins138/149
4748060Flexible pipe covering seam sealing1988-05-31Fry138/151
3941159Insulation assembly for a tubular conduit pipe1976-03-02Toll138/147
D237178N/AOctober, 1975WilsonD23/259
3291508Flexible fluid joint1966-12-13Kolthoff, Jr.277/602
3289702Coverings for conduits1966-12-06Sherburne138/118
3095337Semicylindrical foam elastomer insulation shell1963-06-25Chase138/155
3058860Snap-on metal jacketed pipe insulation1962-10-16Rutter138/147
2980568Plastic pipe covering1961-04-18Kazmierowicz138/147

Foreign References:
GB2520178A2015-05-13An improved insulation
Primary Examiner:
Goodman, Eric L.
Assistant Examiner:
Wierenga, Amy C.
Attorney, Agent or Firm:
Bollman, William H.

1. The ornamental design for a pipe insulation, as shown and described.


FIG. 1 is a front perspective view of two lengths of pipe insulation having inter-connecting ends in a view showing male ends thereof;

FIG. 2 is a rear perspective view of two lengths of pipe insulation having inter-connecting ends in a view showing female ends thereof;

FIG. 3 is an end view of pipe insulation as a form having two halves as an outer layer; and,

FIG. 4 is a side view of two lengths of pipe insulation having inter-connecting ends.

The dashed broken lines shown in the drawings depict environmental subject matter that form no part of the claim.

The pipe insulation is shown with a symbolic break in its length. The appearance of any portion of the pipe insulation between the break lines forms no part of the claim.