Patent US3610787A successfully refreshed from Google Patents.
US3610787A
Expired / Lapsed
US
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Rotary screw machine
Assignee: Individual
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Filing: 1970-03-10
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Granted: 1971-10-05
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Expires: 1990-03-10
Abstract
Abstract A rotary screw machine in which the openings for charging and discharging a gaseous working medium are located in the casing at both faces of the screws, and in which, in each portion of the casing adjacent to the like faces of the screws at a certain distance from the opening provided in this portion of the casing, a groove is provided along the line of engagement of the teeth of the screws and facing the adjacent faces of the screws. One end of this groove is located at the dedendum circle of the teeth of the female screw while the other end of the groove is located beyond the addendum circle of the teeth of this screw.
Inventors
- 👤 Alexandr Ivanovi Borisoglebsky
- 👤 Boris Lazarevich Grinpress
- 👤 Valentin Nikolaevich Pyankov
- 👤 Ivan Akimovich Sakun
- 👤 Jury Iosifovich Dimentov
- 👤 Rafkhat Ismailovich Khasanov
- 👤 Moisei Fishelevich Vainshtein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:01
CPC Classifications
F; F01; F01C; F01C1/00; F01C1/08; F01C1/12; F01C1/14; F01C1/16; F04; F04C; F04C29/00; F04C29/0021; F04C29/0035
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
151 words
A rotary screw machine comprising a casing having an inlet branch and an outlet branch for a gaseous working medium, male and female screws located inside said casing and being in engagement, an inlet opening provided in said casing at the first like faces of said screws, an outlet opening within said casing at the other like faces of said screws, a groove in each portion of said casing adjacent to said first like faces and to the second like faces of said screws, said groove being located along the line of engagement of the teeth of the screws at a distance from the corresponding opening and facing the adjacent faces of said screws, one end of this groove being located at the dedendum circle of the teeth of said female screw and the other end of this groove being located beyond the addendum circle of said teeth of this screw.
Claim 2
Dependent Claim
151 words
A rotary screw machine comprising a casing having an inlet branch and an outlet branch for a gaseous working medium, male and female screws located inside said casing and being in engagement, an inlet opening provided in said casing at the first like faces of said screws, an outlet opening within said casing at the other like faces of said screws, a groove in each portion of said casing adjacent to said first like faces and to the second like faces of said screws, said groove being located along the line of engagement of the teeth of the screws at a distance from the corresponding opening and facing the adjacent faces of said screws, one end of this groove being located at the dedendum circle of the teeth of said female screw and the other end of this groove being located beyond the addendum circle of said teeth of this screw.
Claim 3
Dependent Claim
73 words
A rotary screw machine according to claim 1 in which at the low-pressure side of the face of each tooth of one of said screws at that portion of the profile of this tooth which is backward as viewed in the direction of rotation of said screw, a groove is provided connecting the middle portion of said profile of said tooth with a section of this profile at the root of said tooth.
Claim 4
Dependent Claim
73 words
A rotary screw machine according to claim 1 in which at the high-pressure side on the face of each tooth of one of said screws at that portion of the profile of said tooth which is forward as viewed in the direction of rotation of said screw, a groove is provided connecting the middle portion of said profile of said tooth with a section of this profile at the root of said tooth.
References Cited (Backward Citations)
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US2287716A
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US2620968A
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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) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |