Patent US3752606A successfully refreshed from Google Patents.
US3752606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid injection system for globoid-worm compressor
Assignee: Individual
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Filing: 1971-12-14
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Granted: 1973-08-14
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Expires: 1991-12-14
Abstract
Abstract The invention relates to a system for injecting a liquid to ensure cooling, lubrication and leak-tightness in a globoid-worm compressor. In known systems the liquid is injected substantially parallel to the axis of the worm on the low pressure side of the compressor and in the vicinity of the pinions which cooperate with the worm. According to the invention, the liquid injection system comprises ducts formed in the casing of the compressor and opening in the vicinity of the pinions in the zone where the width of the crests of the worm threads is a minimum. Preferably the duct is oriented transversely to the plane of the pinions.
Inventors
- 👤 B Zimmern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:01
CPC Classifications
F; F04; F04C; F04C18/00; F04C18/48; F04C18/50; F04C18/52; F04C29/00; F04C29/0007
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
269 words
In a compressor comprising a worm which has a body shaped as an hour glass rotating about an axis of symmetry and a plurality of threads projecting from said body, at least one transverse pinion having teeth which mesh with the worm threads, a casing applied against at least part of the external surface of the worm, an inlet port which is located at one end of the worm for the admission of the fluid to be compressed into the casing and an outlet port which is located in the immediate vicinity of the pinion, near the opposite end of the worm and through which said fluid is discharged from the casing, said worm threads projecting from said body to an extent whiCh varies from one end of the worm to the opposite end thereof, the crests of said threads having a width which first decreases, starting from one end of said worm, then passes through a minimum value in a central zone of the worm and lastly increases up to the opposite end of the worm; the improvement comprising means for injecting a liquid into the interior of the casing to ensure leaktightness between the worm threads and the casing and between the worm threads and the pinion teeth, said means comprising at least one injection duct which has an opening into the interior of the casing in the vicinity of the pinion, on that side of the pinion which is subjected to the pressure of the fluid to be compressed and in the vicinity of said central zone, and means to supply said liquid to said duct.
Claim 2
Dependent Claim
269 words
In a compressor comprising a worm which has a body shaped as an hour glass rotating about an axis of symmetry and a plurality of threads projecting from said body, at least one transverse pinion having teeth which mesh with the worm threads, a casing applied against at least part of the external surface of the worm, an inlet port which is located at one end of the worm for the admission of the fluid to be compressed into the casing and an outlet port which is located in the immediate vicinity of the pinion, near the opposite end of the worm and through which said fluid is discharged from the casing, said worm threads projecting from said body to an extent whiCh varies from one end of the worm to the opposite end thereof, the crests of said threads having a width which first decreases, starting from one end of said worm, then passes through a minimum value in a central zone of the worm and lastly increases up to the opposite end of the worm; the improvement comprising means for injecting a liquid into the interior of the casing to ensure leaktightness between the worm threads and the casing and between the worm threads and the pinion teeth, said means comprising at least one injection duct which has an opening into the interior of the casing in the vicinity of the pinion, on that side of the pinion which is subjected to the pressure of the fluid to be compressed and in the vicinity of said central zone, and means to supply said liquid to said duct.
Claim 3
Dependent Claim
47 words
A compressor according to claim 10, wherein the liquid-injection duct opens in the region of the casing located between said central zone and that end of said worm which is located on the same side as the outlet port for the discharge of fluid at high pressure.
Claim 4
Dependent Claim
53 words
A compressor according to claim 1, wherein the opening of the liquid-injection duct in the internal wall of the casing has a dimension in the plane at right angles to the axis of the worm which is greater than the width of the worm-thread crest in the region in which said duct terminates.
Claim 5
Dependent Claim
20 words
A compressor according to claim 1 and means making the liquid-injection pressure proportional to the delivery pressure of the compressor.
Claim 6
Dependent Claim
21 words
A compressor according to claim 1, wherein the liquid-injection duct is directed transversely with respect to the plane of the pinion.
Claim 7
Dependent Claim
25 words
A compressor according to claim 5, wherein the liquid-injection duct is directed towards that portion of the worm which is adjacent to the outlet port.
Claim 8
Dependent Claim
26 words
A compressor according to claim 5, wherein the angle of inclination of the liquid-injection duct with respect to the plane of the pinion is about 60*.
Claim 9
Dependent Claim
60 words
A compressor according to claim 5, in the surface which is circumscribed about the thread crests is a plane or a cone of revolution, wherein the liquid-injection duct is inclined at a small angle both with respect to the plane of the pinion and with respect to the corresponding generator-line of the surface which is circumscribed about the worm threads.
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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |