US5261799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balanced linear motor compressor
Assignee: General Electric Co
•
Filing: 1992-04-03
•
Granted: 1993-11-16
•
Expires: 2012-04-03
Abstract
Abstract This invention relates to balanced linear motor compressors which operate without the use of oil and externally tuned resonant balancers. Such structures of this type, generally, provide a highly reliable oil-free compressor which is internally balanced for use with cryogenic refrigeration equipment so as to attain unattended, continuous operation without maintenance over extended periods of time.
Inventors
- 👤 Evangelos T. Laskaris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:35
CPC Classifications
H; H02; H02K; H02K33/00; H02K33/18; F; F04; F04B; F04B35/00; F04B35/04; F04B35/045
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
94 words
An oil-free linear motor compressor which is comprised of: a stator means; an inner core means substantially located within said stator means; an axially opposed, reciprocating driver coil means substantially located between said stator means and said inner core means such that said driver coil means includes at least two driver coils which reciprocate substantially 180° out of phase relative to each other; a compressor drive means located adjacent said inner core means and attached to said driver coil means; and a gas inlet and exhaust means substantially connected to said compressor drive means.
Claim 2
Dependent Claim
94 words
An oil-free linear motor compressor which is comprised of: a stator means; an inner core means substantially located within said stator means; an axially opposed, reciprocating driver coil means substantially located between said stator means and said inner core means such that said driver coil means includes at least two driver coils which reciprocate substantially 180° out of phase relative to each other; a compressor drive means located adjacent said inner core means and attached to said driver coil means; and a gas inlet and exhaust means substantially connected to said compressor drive means.
Claim 3
Dependent Claim
18 words
The compressor, according to claim 1, wherein said stator means is further comprised of: a DC field coil.
Claim 4
Dependent Claim
21 words
The compressor, according to claim 1, wherein said reciprocating drive means is further comprised of: at least two AC driver coils.
Claim 5
Dependent Claim
30 words
The compressor, according to claim 1, wherein said compressor drive means is further comprised of: a shaft means rigidly attached to said inner core means; and a reciprocating piston means.
Claim 6
Dependent Claim
18 words
The compressor, according to claim 4, wherein said piston means is further comprised of: a hollow, thin-walled piston.
Claim 7
Dependent Claim
43 words
The compressor, according to claim 1, wherein said gas inlet and exhaust means is further comprised of: a gas feed inlet; a gas feed exhaust located away from said gas feed inlet; and a gas bearing means located adjacent said compressor drive means.
Claim 8
Dependent Claim
36 words
The compressor, according to claim 1, wherein said compressor is further comprised of: a reciprocation and flexure detection means located adjacent said compressor drive means; and a pressure detection means located adjacent said compressor drive means.
Claim 9
Dependent Claim
25 words
The compressor, according to claim 1, wherein said reciprocation and flexure detection means is further comprised of: a window means; and a displacement sensor means.
Claim 10
Dependent Claim
26 words
The compressor, according to claim 1, wherein said compressor is further comprised of: a cooling means located adjacent said compressor drive means and said stator means.
Claim 11
Dependent Claim
20 words
The compressor, according to claim 1, wherein said stator means and said inner core means are further comprised of: sawcuts.
Claim 12
Dependent Claim
23 words
The compressor, according to claim 1, wherein said compressor is further comprised of: a gas spring means located adjacent said compressor drive means.
Claim 13
Independent Claim
136 words
A method for compressing gas with an oil-free linear compressor having a stator means, an axially, opposed driver coil means including at least two driver coils, a compressor drive means and a gas inlet and exhaust means, wherein said method is comprised of the steps of: operating said stator means and said driver coil means; reciprocating said driver coil means such that said driver coils reciprocate substantially 180° out of phase relative to each other; introducing gas into said compressor drive means by said gas inlet means; reciprocating said compressor drive means; maintaining said compressor drive means in a predetermined axial reciprocation direction by said gas inlet and exhaust means; compressing said gas; exhausting said compressed gas through said gas exhaust means; and detecting the reciprocation of said driver coil means and said compressor drive means.
Claim 14
Independent Claim
136 words
A method for compressing gas with an oil-free linear compressor having a stator means, an axially, opposed driver coil means including at least two driver coils, a compressor drive means and a gas inlet and exhaust means, wherein said method is comprised of the steps of: operating said stator means and said driver coil means; reciprocating said driver coil means such that said driver coils reciprocate substantially 180° out of phase relative to each other; introducing gas into said compressor drive means by said gas inlet means; reciprocating said compressor drive means; maintaining said compressor drive means in a predetermined axial reciprocation direction by said gas inlet and exhaust means; compressing said gas; exhausting said compressed gas through said gas exhaust means; and detecting the reciprocation of said driver coil means and said compressor drive means.
Claim 15
Dependent Claim
30 words
The method, according to claim 12, wherein said step of introducing gas into said compressor drive means is further comprised of the step of: introducing gas at approximately 75 psi.
Claim 16
Dependent Claim
27 words
The method, according to claim 12, wherein said step of reciprocating said driver coil means is further comprised of the step of: reciprocating at approximately 60 Hz.
Claim 17
Dependent Claim
35 words
The method, according to claim 12, wherein said step of compressing said gas is further comprised of the step of: compressing said gas to approximately 300 psi and to a temperature of at least 500K.
Claim 18
Dependent Claim
14 words
The method, according to claim 12, wherein said gas is further comprised of: helium.
Claim 19
Dependent Claim
28 words
The method, according to claim 12, wherein said compressor drive means is further comprised of: a shaft means coated around an outer circumference with a Teflon® non-stick coating.
References Cited (Backward Citations)
US451320A
Cited
US581204A
Cited
US3149254A
Cited
US3538357A
Cited
US4697113A
Cited
US4894996A
Cited
US5088288A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-11-15 | 1997-05-17 | 1997-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-15 | 2001-05-17 | 2001-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-15 | 2005-05-17 | 2005-11-16 | $7700.00 | Window Closed / Lapsed |