US3603560A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improved cavity wall valve balls
Assignee: Sem-Tec Inc
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Filing: 1969-11-03
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Granted: 1971-09-07
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Expires: 1989-11-03
Abstract
Abstract A valve ball with a cavity therein, formed by casting two semispherical shell-type segments, each having a tubular section therethrough, and bonding the semispherical segments together.
Inventors
- 👤 Samuel E Merrill
- 👤 Joseph D Krosoczka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:25
CPC Classifications
F; F16; F16K; F16K27/00; F16K27/06; F16K27/067
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
58 words
A valve ball comprising a pair of complementary truncated semispherical segments, each having an outer shell member with a tubular section extending therethrough, and means defining a cavity extending between said tubular section and said outer shell member, the surfaces defining the large end of each of said segments being joined together so that their respective cavities register.
Claim 2
Dependent Claim
58 words
A valve ball comprising a pair of complementary truncated semispherical segments, each having an outer shell member with a tubular section extending therethrough, and means defining a cavity extending between said tubular section and said outer shell member, the surfaces defining the large end of each of said segments being joined together so that their respective cavities register.
Claim 3
Dependent Claim
35 words
A valve ball of claim 1, further comprising a solid portion formed in each of said segments between said tubular section and said outer shell and defining a key slot when said segments are joined.
Claim 4
Dependent Claim
17 words
The valve ball of claim 2, wherein each of said cavities is of a substantially arcuate shape.
Claim 5
Dependent Claim
40 words
The valve ball of claim 2, wherein a detent is formed in each of said solid portions, said detents connecting said cavity to said key slot thus providing a vent for the cavity while the segments are being joined together.
Claim 6
Dependent Claim
17 words
The valve ball of claim 4, further comprising a screw extending into said vent to seal it.
Claim 7
Dependent Claim
20 words
The valve ball of claim 1, wherein said surfaces defining the large end of each of said segments are flat.
Claim 8
Dependent Claim
37 words
The valve ball of claim 1, wherein said surfaces defining the large end of each of said segments are in the form of tapered projections adapted to melt during high pressure welding to join said segments together.
Claim 9
Dependent Claim
21 words
The valve ball of claim 1, further comprising a plurality of webs connecting said tubular members and said outer shell members.
Claim 10
Dependent Claim
63 words
The valve ball of claim 8, wherein cooperating notches are formed in said outer shell members and further comprising at least one plug member extending into said notches and being joined to said shell members and tubular members, said webs and said plugs having vent means extending therethrough to provide a vent for the cavity while said segments and plugs are being joined.
Claim 11
Dependent Claim
38 words
The valve ball of claim 9, wherein there are two plug members provided, a portion of each of which extends outwardly from diametrically opposite portions of said outer shell members, said portions of said plug members forming journals.
Claim 12
Dependent Claim
21 words
The valve ball of claim 9, further comprising a screw extending through a portion of said vent means to seal same.
Claim 13
Dependent Claim
68 words
A valve ball comprising a substantially cylindrical body portion having a passage extending therethrough, and an outer truncated substantially spherical shell spaced from said body portion to define a cavity extending therebetween, said cavity being substantially arcuate shaped, a portion of said body portion being substantially arcuate shaped and defining a key slot, and a vent in said body portion which connects said cavity to said key slot.
Claim 14
Dependent Claim
68 words
A valve ball comprising a substantially cylindrical body portion having a passage extending therethrough, and an outer truncated substantially spherical shell spaced from said body portion to define a cavity extending therebetween, said cavity being substantially arcuate shaped, a portion of said body portion being substantially arcuate shaped and defining a key slot, and a vent in said body portion which connects said cavity to said key slot.
Claim 15
Dependent Claim
13 words
The valve ball of claim 12, wherein said cavity is substantially cylindrical shaped.
Claim 16
Dependent Claim
21 words
The valve ball of claim 13, further comprising a plurality of apertured webs connecting said outer shell and said body position.
Claim 17
Dependent Claim
33 words
The valve ball of claim 12, further comprising at least one plug member extending through said outer shell and to said body portion, said plug member being provided with vent passages extending therethrough.
Claim 18
Dependent Claim
20 words
The valve ball of claim 15, further comprising a screw extending into one of said vent passages to seal same.
Claim 19
Dependent Claim
37 words
The valve ball of claim 15, wherein there are two plug members provided, a portion of each of which extends outwardly from diametrically opposite portions of said outer shell, said portions of said plug members forming journals.
Claim 20
Dependent Claim
20 words
The valve ball of claim 12, further comprising two journals extending outwardly from diametrically opposite portions of said outer shell.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-06 | 1975-03-08 | 1975-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-06 | 1979-03-08 | 1979-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-06 | 1983-03-08 | 1983-09-07 | $7700.00 | Window Closed / Lapsed |