Patent US4169309A successfully refreshed from Google Patents.
US4169309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a sight glass assembly
Assignee: PRESSURE PRODUCTS COMPANY Inc A CORP OF WEST VA
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Filing: 1978-06-27
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Granted: 1979-10-02
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Expires: 1998-06-27
Abstract
Abstract A method of making a sight glass assembly generally including forming a housing having an opening therethrough provided with an annular wall, forming a lens having an annular peripheral wall provided with a diameter greater than the diameter of the housing wall at predetermined equilibrium conditions, effecting a change in the predetermined equilibrium conditions of the lens and housing sufficient to cause a dimensional change between the diameters of the housing and lens walls sufficient to permit the insertion of the lens into the opening of the housing, inserting the lens into the housing opening while maintaining the change in conditions so that the lens wall is positioned in opposed relation to the housing wall, and maintaining the lens in the opening with the lens and housing walls disposed in opposed relation while permitting a return to the equilibrium conditions of the lens and housing whereby the housing and lens wall will engage to place the lens in radial compression and form a fluid tight seal.
Inventors
- 👤 Charles E. Meginnis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:14
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/007; B; B23; B23P; B23P11/00; B23P11/02; B23P11/025; Y; Y10; Y10S; Y10S29/00; Y10S29/035; Y10S359/00; Y10S359/90; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49865
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
184 words
A method of making a sight glass assembly comprising forming a housing having an opening therethrough, provided with an annular wall, forming a lens having an annular peripheral wall provided with a diameter not greater than the diameter of said housing wall at predetermined equilibrium conditions, effecting a change in said predetermined equilibrium conditions sufficient to cause an increase in the radius differential of said lens and housing walls, inserting said lens in said opening while maintaining said change in conditions so that said lens wall is positioned in opposed relation to said housing wall, inserting an annular liner formed of a deformable material and having a thickness greater than the radius differential of said lens and housing walls under said predetermined equilibrium conditions, between said lens and housing walls, and maintaining said liner interposed between said housing and said lens while permitting said housing and said lens to return approaching said equilibrium conditions whereby said housing and lens walls will engage said liner to place said lens in uniform radial compression and form a fluid tight seal between said housing and said lens.
Claim 2
Independent Claim
184 words
A method of making a sight glass assembly comprising forming a housing having an opening therethrough, provided with an annular wall, forming a lens having an annular peripheral wall provided with a diameter not greater than the diameter of said housing wall at predetermined equilibrium conditions, effecting a change in said predetermined equilibrium conditions sufficient to cause an increase in the radius differential of said lens and housing walls, inserting said lens in said opening while maintaining said change in conditions so that said lens wall is positioned in opposed relation to said housing wall, inserting an annular liner formed of a deformable material and having a thickness greater than the radius differential of said lens and housing walls under said predetermined equilibrium conditions, between said lens and housing walls, and maintaining said liner interposed between said housing and said lens while permitting said housing and said lens to return approaching said equilibrium conditions whereby said housing and lens walls will engage said liner to place said lens in uniform radial compression and form a fluid tight seal between said housing and said lens.
Claim 3
Dependent Claim
21 words
A method according to claim 1 wherein the materials of said housing and said lens have different coefficients of thermal expansion.
Claim 4
Dependent Claim
28 words
A method according to claim 2 wherein the effecting of a change in said equilibrium conditions consists of effecting a temperature differential between said housing and said lens.
Claim 5
Dependent Claim
23 words
A method according to claim 3 wherein the effecting of said temperature differential consists of heating said housing to a predetermined elevated temperature.
Claim 6
Dependent Claim
23 words
A method according to claim 3 wherein the effecting of said temperature differential consists of cooling said lens to a predetermined reduced temperature.
Claim 7
Dependent Claim
30 words
A method according to claim 3 wherein the effecting of said temperature differential consists of heating said housing to an elevated temperature and cooling said lens to a reduced temperature.
Claim 8
Dependent Claim
28 words
A method according to claim 2 wherein the effecting of a change in said equilibrium conditions consists of heating said housing and said lens to an elevated temperature.
Claim 9
Dependent Claim
28 words
A method according to claim 2 wherein the effecting of a change in said equilibrium conditions consists of cooling said housing and said lens to a reduced temperature.
Claim 10
Dependent Claim
21 words
A method according to claim 1 wherein the materials of said housing and said lens have the same coefficient thermal expansion.
Claim 11
Dependent Claim
28 words
A method according to claim 9 wherein the effecting of a change in said equilibrium conditions consists of effecting a temperature differential between said housing and said lens.
Claim 12
Independent Claim
196 words
A method of making a sight glass assembly, comprising forming a housing having an opening therethrough, provided with an annular wall, forming a lens having an annular peripheral wall provided with a diameter not greater than the diameter of said housing wall at predetermined equilibrium conditions, effecting a change in said predetermined equilibrium conditions sufficient to cause an increase in the radius differential of said lens and housing walls, positioning around the annular wall of said lens an annular liner formed of a deformable material and having a thickness greater than the radius differential of said lens and housing walls under said predetermined equilibrium conditions, between said lens and housing walls, inserting said lens and said liner in said opening while maintaining said change in conditions so that said lens wall and said liner are positioned in opposed relation to said housing wall, and maintaining said liner interposed between said housing and said lens while permitting said housing and said lens to return approaching said equilibrium conditions whereby said housing and lens walls will engage said liner to place said lens in radial compression and form a fluid tight seal between said housing and said lens.
Claim 13
Independent Claim
196 words
A method of making a sight glass assembly, comprising forming a housing having an opening therethrough, provided with an annular wall, forming a lens having an annular peripheral wall provided with a diameter not greater than the diameter of said housing wall at predetermined equilibrium conditions, effecting a change in said predetermined equilibrium conditions sufficient to cause an increase in the radius differential of said lens and housing walls, positioning around the annular wall of said lens an annular liner formed of a deformable material and having a thickness greater than the radius differential of said lens and housing walls under said predetermined equilibrium conditions, between said lens and housing walls, inserting said lens and said liner in said opening while maintaining said change in conditions so that said lens wall and said liner are positioned in opposed relation to said housing wall, and maintaining said liner interposed between said housing and said lens while permitting said housing and said lens to return approaching said equilibrium conditions whereby said housing and lens walls will engage said liner to place said lens in radial compression and form a fluid tight seal between said housing and said lens.
Claim 14
Independent Claim
191 words
A method of making a sight glass assembly comprising forming a housing having an opening therethrough provided with an annular wall, forming a lens having an annular peripheral wall provided with a diameter not greater than the diameter of said housing wall at predetermined equilibrium conditions, effecting a change in said predetermined equilibrium conditions sufficient to cause an increase in the radius differential of said lens and housing walls, positioning adjacent said annular wall of said opening an annular liner formed of a deformable material and having a thickness greater than the radius differential of said lens and housing walls under said predetermined equilibrium conditions, between said lens and housing walls, inserting said lens in said annular liner while maintaining said change in conditions so that said lens wall is positioned in opposed relation to said housing wall, and maintaining said liner interposed between said housing and said lens while permitting said housing and said lens to return approaching said equilibrium conditions whereby said housing and lens walls will engage said liner to place said lens in radial compression and form a fluid tight seal between said housing and said lens.
Claim 15
Independent Claim
191 words
A method of making a sight glass assembly comprising forming a housing having an opening therethrough provided with an annular wall, forming a lens having an annular peripheral wall provided with a diameter not greater than the diameter of said housing wall at predetermined equilibrium conditions, effecting a change in said predetermined equilibrium conditions sufficient to cause an increase in the radius differential of said lens and housing walls, positioning adjacent said annular wall of said opening an annular liner formed of a deformable material and having a thickness greater than the radius differential of said lens and housing walls under said predetermined equilibrium conditions, between said lens and housing walls, inserting said lens in said annular liner while maintaining said change in conditions so that said lens wall is positioned in opposed relation to said housing wall, and maintaining said liner interposed between said housing and said lens while permitting said housing and said lens to return approaching said equilibrium conditions whereby said housing and lens walls will engage said liner to place said lens in radial compression and form a fluid tight seal between said housing and said lens.
Claim 16
Independent Claim
174 words
A method of making a sight glass assembly comprising forming a housing having an opening therethrough, provided with a peripheral wall, forming a lens having a peripheral wall sized to fit within said opening at predetermined equilibrium conditions, effecting a change in said predetermined equilibrium conditions sufficient to cause an increase in the radius differential of said lens and housing walls, inserting said lens in said opening while maintaining said change in conditions so that said lens wall is positioned in opposed relation to said housing wall, inserting a liner formed of a deformable material and having a thickness greater than the radius differential of said lens and housing walls under said predetermined equilibrium conditions, between said lens and housing walls, and maintaining said liner interposed between said housing and said lens while permitting said housing and said lens to return approaching said equilibrium conditions whereby said housing and lens walls will engage said liner to place said lens in radial compression and form a fluid tight seal between said housing and said lens.
Claim 17
Independent Claim
174 words
A method of making a sight glass assembly comprising forming a housing having an opening therethrough, provided with a peripheral wall, forming a lens having a peripheral wall sized to fit within said opening at predetermined equilibrium conditions, effecting a change in said predetermined equilibrium conditions sufficient to cause an increase in the radius differential of said lens and housing walls, inserting said lens in said opening while maintaining said change in conditions so that said lens wall is positioned in opposed relation to said housing wall, inserting a liner formed of a deformable material and having a thickness greater than the radius differential of said lens and housing walls under said predetermined equilibrium conditions, between said lens and housing walls, and maintaining said liner interposed between said housing and said lens while permitting said housing and said lens to return approaching said equilibrium conditions whereby said housing and lens walls will engage said liner to place said lens in radial compression and form a fluid tight seal between said housing and said lens.
Claim 18
Independent Claim
186 words
A method of making a sight glass assembly, comprising forming a housing having an opening therethrough, provided with a peripheral wall, forming a lens having a peripheral wall sized to fit within said opening at predetermined equilibrium conditions, effecting a change in said predetermined equilibrium conditions sufficient to cause an increase in the radius differential of said lens and housing walls, positioning around the wall of said lens a liner formed of a deformable material and having a thickness greater than the radius differential of said lens and housing walls under said predetermined equilibrium conditions, between said lens and housing walls, inserting said lens and said liner in said opening while maintaining said change in conditions so that said lens wall and said liner are positioned in opposed relation to said housing wall, and maintaining said liner interposed between said housing and said lens while permitting said housing and said lens to return approaching said equilibrium conditions whereby said housing and lens walls will engage said liner to place said lens in radial compression and form a fluid tight seal between said housing and said lens.
Claim 19
Independent Claim
186 words
A method of making a sight glass assembly, comprising forming a housing having an opening therethrough, provided with a peripheral wall, forming a lens having a peripheral wall sized to fit within said opening at predetermined equilibrium conditions, effecting a change in said predetermined equilibrium conditions sufficient to cause an increase in the radius differential of said lens and housing walls, positioning around the wall of said lens a liner formed of a deformable material and having a thickness greater than the radius differential of said lens and housing walls under said predetermined equilibrium conditions, between said lens and housing walls, inserting said lens and said liner in said opening while maintaining said change in conditions so that said lens wall and said liner are positioned in opposed relation to said housing wall, and maintaining said liner interposed between said housing and said lens while permitting said housing and said lens to return approaching said equilibrium conditions whereby said housing and lens walls will engage said liner to place said lens in radial compression and form a fluid tight seal between said housing and said lens.
Claim 20
Independent Claim
180 words
A method of making a sight glass assembly comprising forming a housing having an opening therethrough provided with a peripheral wall, forming a lens having a peripheral wall sized to fit within said opening at predetermined equilibrium conditions, effecting a change in said predetermined equilibrium conditions suffcieient to cause an increase in the radius differential of said lens and housing walls, positioning adjacent said wall of said opening a liner formed of a deformable material and having a thickness greater than the radius differential of said lens and housing walls under said predetermined equilibrium conditions, between said lens and housing walls, inserting said lens in said liner while maintaining said change in conditions so that said lens wall is positioned in opposed relation to said housing wall, and maintaining said liner interposed between said housing and said lens while permitting said housing and said lens to return approaching said equilibrium conditions whereby said housing and lens walls will engage said liner to place said lens in radial compression and form a fluid tight seal between said housing and said lens.
Claim 21
Independent Claim
180 words
A method of making a sight glass assembly comprising forming a housing having an opening therethrough provided with a peripheral wall, forming a lens having a peripheral wall sized to fit within said opening at predetermined equilibrium conditions, effecting a change in said predetermined equilibrium conditions suffcieient to cause an increase in the radius differential of said lens and housing walls, positioning adjacent said wall of said opening a liner formed of a deformable material and having a thickness greater than the radius differential of said lens and housing walls under said predetermined equilibrium conditions, between said lens and housing walls, inserting said lens in said liner while maintaining said change in conditions so that said lens wall is positioned in opposed relation to said housing wall, and maintaining said liner interposed between said housing and said lens while permitting said housing and said lens to return approaching said equilibrium conditions whereby said housing and lens walls will engage said liner to place said lens in radial compression and form a fluid tight seal between said housing and said lens.
References Cited (Backward Citations)
US1331091A
Cited
US2144928A
Cited
US2218722A
Cited
US2252504A
Cited
US2419648A
Cited
CH379647A
Cited
FR1311323A
Cited
US3373610A
Cited
US3345872A
Cited
US3371413A
Cited
US3625390A
Cited
US3849531A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-01 | 1983-04-02 | 1983-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-01 | 1987-04-02 | 1987-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-01 | 1991-04-02 | 1991-10-02 | $7700.00 | Window Closed / Lapsed |