Patent US3814550A successfully refreshed from Google Patents.
US3814550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor arrangement and lubrication system for oscillatory compressor
Assignee: General Electric Co
•
Filing: 1972-12-07
•
Granted: 1974-06-04
•
Expires: 1992-12-07
Abstract
Abstract The production of an unbalanced, electrodynamic driving force to compensate for unbalanced compression forces in an oscillatory compressor is affected by a relative null positionment of the armature and air gap to locate an effective midplane of air gap flux density on the compression stroke side of a maximal plane of armature strength. The substitution of permanent ceramic magnets for the usual metal alloy (Alnico) magnets not only results in substantial cost and weight savings but, also, permits a surrounding, concentric arrangement of the magnets and armature in widely spaced relation to the compression cylinder to preclude substantial heat transfer therebetween. A vibrating tube pump, operative as a function of the reactive reciprocation of the compression cylinder and its interconnected casing, transfers lubricating oil upwardly from a lower housing reservoir to a compressor casing sump from whence the oil is distributed to the open, upper end of the compression cylinder to lubricate the same.
Inventors
- 👤 G Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:25
CPC Classifications
F; F04; F04B; F04B35/00; F04B35/04; F04B35/045; H; H02; H02K; H02K33/00; H02K33/18
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
117 words
An electromagnetically operated, oscillatory compressor having a compression cylinder surrounded by magnetic circuit means including an annular air gap; a piston and annular armature mounted for conjoint reciprocating movement within said cylinder and air gap, respectively; means for energizing said armature and defining a plane of maximum field strength perpendicular to the axis of said annular armature; elastic means biasing said armature and piston toward a null position of said plane of maximum field strength lying intermediate the reciprocating armature stroke length; and the effective midplane of the annular air gap flux density, as measured along the longitudinal axis of the annular air gap, lying intermediate said null position and one end of said reciprocating stroke length.
Claim 2
Dependent Claim
117 words
An electromagnetically operated, oscillatory compressor having a compression cylinder surrounded by magnetic circuit means including an annular air gap; a piston and annular armature mounted for conjoint reciprocating movement within said cylinder and air gap, respectively; means for energizing said armature and defining a plane of maximum field strength perpendicular to the axis of said annular armature; elastic means biasing said armature and piston toward a null position of said plane of maximum field strength lying intermediate the reciprocating armature stroke length; and the effective midplane of the annular air gap flux density, as measured along the longitudinal axis of the annular air gap, lying intermediate said null position and one end of said reciprocating stroke length.
Claim 3
Dependent Claim
21 words
The compressor of claim 1 wherein said magnetic circuit means includes a permanent magnet defining a portion of said air gap.
Claim 4
Dependent Claim
18 words
The compressor of claim 1 including permanent magnet means defining one annular wall of said annular air gap.
Claim 5
Dependent Claim
17 words
The compressor of claim 3 wherein said permanent magnet means comprise a plurality of annular, ceramic segments.
Claim 6
Dependent Claim
46 words
The compressor of claim 1 wherein said magnetic circuit means includes annular, ceramic magnet means; and said magnetic circuit means being radially spaced from said compression cylinder and defining therewith a cooling gas flow passage therebetween for dissipating compression heat from said cylinder to said armature.
Claim 7
Dependent Claim
139 words
An electromagnetically operated, oscillatory compressor, comprising; a compression cylinder, having a valved compression end, surrounded by magnetic circuit means including an annular air gap; a piston and annular armature mounted for conjoint reciprocating movement within said cylinder and air gap, respectively; said armature defining a plane of maximum field strength perpendicular to the axis of said annular armature; elastic means biasing said armature and piston toward a null position of said plane of maximum field strength lying intermediate the reciprocating armature stroke length; and the midplane of said annular air gap, as measured along the longitudinal axis thereof, lying intermediate said null position and the compression end of said cylinder for imparting an unbalanced electrodynamic driving force to said armature and piston in the direction of the compression end of said cylinder to compensate for compression forces developed therein.
Claim 8
Dependent Claim
139 words
An electromagnetically operated, oscillatory compressor, comprising; a compression cylinder, having a valved compression end, surrounded by magnetic circuit means including an annular air gap; a piston and annular armature mounted for conjoint reciprocating movement within said cylinder and air gap, respectively; said armature defining a plane of maximum field strength perpendicular to the axis of said annular armature; elastic means biasing said armature and piston toward a null position of said plane of maximum field strength lying intermediate the reciprocating armature stroke length; and the midplane of said annular air gap, as measured along the longitudinal axis thereof, lying intermediate said null position and the compression end of said cylinder for imparting an unbalanced electrodynamic driving force to said armature and piston in the direction of the compression end of said cylinder to compensate for compression forces developed therein.
Claim 9
Dependent Claim
38 words
The compressor of claim 6 wherein said magnetic circuit means is radially spaced from said compression cylinder and includes a plurality of permanent, ceramic magnets; and said ceramic magnets comprising one annular wall of said annular air gap.
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) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |