US4503594A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for fabricating an orifice fitting for a gas pressure differential-measuring system
Assignee: McJunkin Corp
•
Filing: 1983-07-14
•
Granted: 1985-03-12
•
Expires: 2003-07-14
Abstract
Abstract An orifice fitting for a gas pressure differential-measuring system is constructed of a fabricated body. In the fabrication, two lengths of flared or flanged pipe are inserted through the internal bores of respective orifice blocks and circumferentially welded on the outside. A U-member, which may be assembled of three straight pieces, is welded between the two blocks joining them and leaving a slot at the top. An orifice holder dependingly secured to a cover is provided with an orifice plate rimmed within a gasket and inserted through the slot. The cover is removably, sealingly mounted on the body. The outer face of the upstream face of the gasket is radially notched to equalize pressure in the orifice chamber.
Inventors
- 👤 Adam F. Gall
- 👤 Howard P. McJunkin, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:22
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/34; G01F1/36; G01F1/40; G01F1/42; Y; Y10; Y10S; Y10S29/00; Y10S29/026; Y10S29/043; Y10T; Y10T29/00; Y10T29/49; Y10T29/49428; Y10T29/49432; Y10T29/49826; Y10T29/49861; Y10T29/49893
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
239 words
A method for constructing an orifice fitting for a gas pressure differential-measuring system, comprising: (a) providing two block members each with an inner face and a throughbore extending through that face; (b) providing two lengths of pipe, each flared at the inner end thereof to define a radially outwardly projecting circumferential flange; (c) inserting each pipe into a respective throughbore through the inner face of the respective block member, with an outer end portion of that pipe protruding from the opposite end of the respective throughbore to provide a pipe stub extending from the respective block; (d) circumferentially welding each pipe stub to the respective block where that pipe stub emerges from the respective throughbore, thus providing two orifice block assemblies; (e) providing a U-shaped spacer having two legs and a bridge, presenting the two orifice block assemblies, inner faces inwards, in sandwiching relation to the U-shaped spacer and welding about the external periphery of the U-shaped spacer, between the U-shaped spacer and both said blocks to form a unitary body having a laterally opening slot through one side, between the legs of the U-shaped spacer and in communication with the inner ends of both of said pipes; (f) machining said side of said body to provide for the mounting and sealing of an orifice holder assembly thereto; and (g) forming a pressure tap through each said orifice block assembly and the respective pipe stub wall adjacent said slot.
Claim 2
Independent Claim
239 words
A method for constructing an orifice fitting for a gas pressure differential-measuring system, comprising: (a) providing two block members each with an inner face and a throughbore extending through that face; (b) providing two lengths of pipe, each flared at the inner end thereof to define a radially outwardly projecting circumferential flange; (c) inserting each pipe into a respective throughbore through the inner face of the respective block member, with an outer end portion of that pipe protruding from the opposite end of the respective throughbore to provide a pipe stub extending from the respective block; (d) circumferentially welding each pipe stub to the respective block where that pipe stub emerges from the respective throughbore, thus providing two orifice block assemblies; (e) providing a U-shaped spacer having two legs and a bridge, presenting the two orifice block assemblies, inner faces inwards, in sandwiching relation to the U-shaped spacer and welding about the external periphery of the U-shaped spacer, between the U-shaped spacer and both said blocks to form a unitary body having a laterally opening slot through one side, between the legs of the U-shaped spacer and in communication with the inner ends of both of said pipes; (f) machining said side of said body to provide for the mounting and sealing of an orifice holder assembly thereto; and (g) forming a pressure tap through each said orifice block assembly and the respective pipe stub wall adjacent said slot.
Claim 3
Dependent Claim
92 words
The method of claim 1, further comprising: (h) providing an orifice holder assembly having a generally horizontal cover with a depending orifice holder having an opening provided through the thickness thereof; (i) inserting in that opening an orifice plate rimmed with a gasket; (j) sandwiching a perimetrically extending cover gasket between said cover and said side of said body, inserting the depending orifice holder containing said orifice plate and gasket into said slot, and sealingly securing the cover of the orifice holder assembly to said body upon said side of said body.
Claim 4
Dependent Claim
62 words
The method of claim 2, wherein: in conducting step (a) the two block members are each provided with a counterbore at the intersection of the respective throughbore with the respective inner face; and in conducting step (c), the flared inner end of each pipe is made flush with the respective block inner face by seating the respective flange in the respective counterbore.
References Cited (Backward Citations)
US1822961A
Cited
US1753276A
Cited
US1958854A
Cited
US1980699A
Cited
US2585290A
Cited
US3027135A
Cited
US3319661A
Cited
US3442286A
Cited
US3624882A
Cited
US3718314A
Cited
US3993092A
Cited
US4377274A
Cited
US4393722A
Cited
US4399708A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-03-11 | 1988-09-10 | 1989-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-11 | 1992-09-10 | 1993-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-11 | 1996-09-10 | 1997-03-12 | $7700.00 | Window Closed / Lapsed |