Patent US3559694A successfully refreshed from Google Patents.
US3559694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removable insulated fitting for pipe joints
Assignee: ASSOCIATED INSULATION OF CALIF
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Filing: 1969-04-14
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Granted: 1971-02-02
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Expires: 1989-04-14
Abstract
Abstract A removable insulation unit for surrounding pipe joints, particularly at fittings such as elbows, tees and the like comprises a pair of relatively thin outer shells which are connectable by fastener means to form a cylindrical cover. An insulation liner surrounded by a perforated member is secured within each shell member by hook members that extend inwardly from its inner wall.
Inventors
- 👤 Fred J Volberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:16
CPC Classifications
F; F16; F16L; F16L59/00; F16L59/14; F16L59/16; F16L59/163; F16L59/22; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
88 words
A removable insulation unit for a pipe fitting comprising: first and second rigid shells each having the same general configuration and a generally semicircular shape in cross section; a liner member within each said shell comprised of insulation material and an enveloping layer of flexible, perforated material attached thereto; means on the inside of each of said shells extending through said perforated material for retaining a said liner member in place; and means on the outside of both said shells for holding them together around a pipe fitting.
Claim 2
Dependent Claim
88 words
A removable insulation unit for a pipe fitting comprising: first and second rigid shells each having the same general configuration and a generally semicircular shape in cross section; a liner member within each said shell comprised of insulation material and an enveloping layer of flexible, perforated material attached thereto; means on the inside of each of said shells extending through said perforated material for retaining a said liner member in place; and means on the outside of both said shells for holding them together around a pipe fitting.
Claim 3
Dependent Claim
42 words
The insulation unit as described in claim 1 wherein said first shell includes longitudinal edge portions that extend beyond the longitudinal edges of its liner member and overlap said second shell when the two shells are assembled as on a pipe fitting.
Claim 4
Dependent Claim
46 words
The insulation unit as described in claim 1 including end portions on each of said shells that extend beyond the ends of each liner member and thereby are adapted to overlap insulation around pipe sections connected to the pipe fitting that is covered by said unit.
Claim 5
Dependent Claim
35 words
The insulation unit as described in claim 1 wherein said first and second shells and said liner members therein have a curved shape whereby the insulation unit is adapted for application to a pipe elbow.
Claim 6
Dependent Claim
23 words
The insulation unit as described in claim 1 wherein said first and second shells and said liner members therein have a ''''tee'''' shape.
Claim 7
Dependent Claim
24 words
The insulation unit as described in claim 1 wherein said means on the inside of each said shell comprises a plurality of hook members.
Claim 8
Dependent Claim
19 words
The insulation unit as described in claim 1 wherein said flexible perforated material is a stainless steel wire mesh.
Claim 9
Dependent Claim
50 words
The insulation unit as described in claim 1 wherein said means on the outside of said shells for holding them together comprises hook members located at spaced apart intervals on one of said shells and a cooperating latching member for each said hook member pivotally attached to the other shell.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |