Patent US3807429A successfully refreshed from Google Patents.
US3807429A
Expired / Lapsed
US
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Thermodynamic steam trap
Assignee: Velan Engineering Ltd
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Filing: 1971-06-02
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Granted: 1974-04-30
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Expires: 1991-06-02
Abstract
Abstract A thermodynamic steam trap of the disc type having an integral body and seating surfaces, in which the body proper is of a conveniently weldable metal and the seating surfaces are of a hard erosion resistant metal seat material not suitable itself for a body with welded connections.
Inventors
- 👤 G Breton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:42
CPC Classifications
F; F16; F16T; F16T1/00; F16T1/12; F16T1/16; F16T1/165; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3021; Y10T137/304; Y10T137/6851; Y10T137/6966; Y10T137/6969; Y10T137/6977; Y10T29/00; Y10T29/49; Y10T29/49405; Y10T29/49412; Y10T29/49416; Y10T29/49421
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
318 words
A disc-type thermodynamic steam trap, comprising, in combination: a body of a relatively readily weldable metal including inlet and outlet passage means, said body including a head portion having central passage means communicating with said inlet passage means said body having an annular chamber surrounding the inlet passage means in said head portion and communicating through passage means with said outlet passage means; a bonnet element having a portion forming a control chamber over said inlet passage means and secured to said head portion, said head portion including an annular shoulder and said bonnet including an inner shoulder in juxtaposed sealed relationship and closing the control chamber, said head portion including an outer annular recess depending into said head portion shoulder outwardly of the annular chamber, said recess having a bottom surface continuing radially inwardly of said annular chamber and intersecting a second annular recess depending axially of the central passage inwardly of the annular chamber and forming an offset therewith, a machined element insert of a comparatively hard erosionresistant material having relatively difficult welding characteristics, said machined element having a lower surface complementary to the annular recesses and mated therein and defining inwardly and outwardly of the annular chamber L-shaped joints in crosssection respectively disposed at the control chamber and said central passage in which the base of the outer L-shaped joint intersects at an intermediate L-shaped joint at the top of the inner L-shaped joint, a web apertured to communicate with said annular chamber, said insert having a second annular chamber overlying the apertured web and communicating therewith, the second annular chamber defining inner and outer co-axial flanges having coplanar upper seating surfaces; a sealing disc resting on said upper seating surfaces for displacement due to predetermined pressure-variations between the control chamber and said central passage, the complementary surfaces of said insert and body head member being intimately bonded at said L-shaped joints and complementary surfaces.
Claim 2
Dependent Claim
318 words
A disc-type thermodynamic steam trap, comprising, in combination: a body of a relatively readily weldable metal including inlet and outlet passage means, said body including a head portion having central passage means communicating with said inlet passage means said body having an annular chamber surrounding the inlet passage means in said head portion and communicating through passage means with said outlet passage means; a bonnet element having a portion forming a control chamber over said inlet passage means and secured to said head portion, said head portion including an annular shoulder and said bonnet including an inner shoulder in juxtaposed sealed relationship and closing the control chamber, said head portion including an outer annular recess depending into said head portion shoulder outwardly of the annular chamber, said recess having a bottom surface continuing radially inwardly of said annular chamber and intersecting a second annular recess depending axially of the central passage inwardly of the annular chamber and forming an offset therewith, a machined element insert of a comparatively hard erosionresistant material having relatively difficult welding characteristics, said machined element having a lower surface complementary to the annular recesses and mated therein and defining inwardly and outwardly of the annular chamber L-shaped joints in crosssection respectively disposed at the control chamber and said central passage in which the base of the outer L-shaped joint intersects at an intermediate L-shaped joint at the top of the inner L-shaped joint, a web apertured to communicate with said annular chamber, said insert having a second annular chamber overlying the apertured web and communicating therewith, the second annular chamber defining inner and outer co-axial flanges having coplanar upper seating surfaces; a sealing disc resting on said upper seating surfaces for displacement due to predetermined pressure-variations between the control chamber and said central passage, the complementary surfaces of said insert and body head member being intimately bonded at said L-shaped joints and complementary surfaces.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-29 | 1977-10-29 | 1978-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-29 | 1981-10-29 | 1982-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-29 | 1985-10-29 | 1986-04-30 | $7700.00 | Window Closed / Lapsed |