US4084368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for insulating purlins
Assignee: Individual
•
Filing: 1976-01-23
•
Granted: 1978-04-18
•
Expires: 1996-01-23
Abstract
Abstract In metal buildings, a plurality of purlins project down into the building and, in effect, serve as heat exchange fins, which conduct heat into the building in warm climates, and heat out of the building in cold climates. In order to counteract this phenomenon, each purlin is covered with a separate blanket of insulating material, which is held in place with a flexible sleeve that is laminated to the blanket. Two additional flexible sliding sleeves are used to complete installation at each end of the purlin.
Inventors
- 👤 Kenneth Morris Stilts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:22
CPC Classifications
E; E04; E04D; E04D12/00; E04D12/004; E04D13/00; E04D13/16; E04D13/1606; E04D13/1612
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
58 words
A purlin insulated to reduce heat transfer from outside of a building into the building and from inside the building to outside of the building, said purlin including: a blanket of flexible thermal insulating material folded around the purlin; and a sleeve of thin flexible material surrounding the blanket to hold the blanket in place on the purlin.
Claim 2
Dependent Claim
58 words
A purlin insulated to reduce heat transfer from outside of a building into the building and from inside the building to outside of the building, said purlin including: a blanket of flexible thermal insulating material folded around the purlin; and a sleeve of thin flexible material surrounding the blanket to hold the blanket in place on the purlin.
Claim 3
Dependent Claim
50 words
The purlin of claim 1, wherein the purlin has a main web, an upper flange and a lower flange, and wherein the blanket is generally U-shaped and is formed around the purlin to cover all surfaces of the purlin with the exception of the top surface of the upper flange.
Claim 4
Dependent Claim
12 words
The purlin of claim 2 wherein the blanket is made of fiberglass.
Claim 5
Dependent Claim
45 words
The purlin of claim 1, wherein the sleeve and blanket are in the form of a performed laminate, wherein the sleeve and blanket are held together by an adhesive to form a tubular assembly, which is slid over the purlin before the purlin is installed.
Claim 6
Dependent Claim
12 words
The purlin of claim 4 wherein the blanket is made of fiberglass.
Claim 7
Dependent Claim
38 words
The purlin of claim 4, wherein portions of the blanket project beyond the sleeve adjacent the ends of the purlin, and wherein auxiliary sleeves are disposed around the tubular assembly and slid thereover after the purlin is installed.
Claim 8
Dependent Claim
12 words
The purlin of claim 6 wherein the blanket is made of fiberglass.
Claim 9
Dependent Claim
54 words
Apparatus for thermally insulating purlins from environmental temperature gradients between the inside and outside of a building, wherein the apparatus comprises: a tubular assembly including a blanket of insulating material folded into a U-shape surrounded by a thin flexible sleeve, wherein the tubular assembly is slid over the purlin before the purlin is installed.
Claim 10
Dependent Claim
54 words
Apparatus for thermally insulating purlins from environmental temperature gradients between the inside and outside of a building, wherein the apparatus comprises: a tubular assembly including a blanket of insulating material folded into a U-shape surrounded by a thin flexible sleeve, wherein the tubular assembly is slid over the purlin before the purlin is installed.
Claim 11
Dependent Claim
17 words
The apparatus of claim 8, wherein the blanket is adhered to the sleeve to form a laminate.
Claim 12
Dependent Claim
12 words
The apparatus of claim 9 wherein the blanket is made of fiberglass.
Claim 13
Dependent Claim
40 words
The apparatus of claim 9, wherein portions of the blanket project beyond each end of the sleeve, and wherein auxiliary slidable sleeves are provided over the assembly for covering the projecting portions of the blanket after the purlin is installed.
Claim 14
Dependent Claim
12 words
The apparatus of claim 11 wherein the blanket is made of fiberglass.
Claim 15
Dependent Claim
12 words
The apparatus of claim 8 wherein the blanket is made of fiberglass.
References Cited (Backward Citations)
US573127A
Cited
US1491198A
Cited
US2100624A
Cited
GB557609A
Cited
US2366149A
Cited
US2391049A
Cited
US2821941A
Cited
US3238690A
Cited
US3040849A
Cited
US3179983A
Cited
US3217456A
Cited
GB983409A
Cited
US3327441A
Cited
US3328086A
Cited
US3570208A
Cited
US3606418A
Cited
US3597891A
Cited
US3908327A
Cited
US3922828A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-17 | 1981-10-17 | 1982-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-17 | 1985-10-17 | 1986-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-17 | 1989-10-17 | 1990-04-18 | $7700.00 | Window Closed / Lapsed |