Patent US3842378A successfully refreshed from Google Patents.
US3842378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double clutch for vehicle air conditioning compressor
Assignee: Hilite Industries Inc
•
Filing: 1973-07-20
•
Granted: 1974-10-15
•
Expires: 1993-07-20
Abstract
Abstract A compressor driven by a vehicle engine through an electromagnetically engaged clutch, is alternatively driven by an electric motor through a permanent magnet coupling that is rendered operative when the clutch is disengaged. An axially displaceable armature common to both the clutch and the coupling, conducts magnetic flux emitted from the permanent magnets of the coupling and the electromagnetic coil assembly of the clutch along a common flux path.
Inventors
- 👤 W Pierce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:45
CPC Classifications
F; F04; F04B; F04B35/00; F16; F16D; F16D27/00; F16D27/004; H; H02; H02K; H02K7/00; H02K7/10; H02K7/108; H02K7/1085
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
141 words
In combination with a pair of axially spaced members and an armature axially displaceable into engagement with said members alternatively, torque transmitting control means comprising a pair of magnetic flux emitting devices respectively establishing mutually repelling magnetic fields extending from said axially spaced members on opposite axial sides of said armature, means respectively mounting said flux emitting devices within the axially spaced members for establishing a flux path through said armature common to both of said magnetic fields, and means for selectively collapsing one of the magnetic fields extending from one of the axially spaced members to effect axial displacement of the armature into engagement with the other of the axially spaced members, said armature being dimensionally restricted in an axial direction to substantially confine the magnetic fields between the axially spaced members to the common flux path through the armature.
Claim 2
Dependent Claim
141 words
In combination with a pair of axially spaced members and an armature axially displaceable into engagement with said members alternatively, torque transmitting control means comprising a pair of magnetic flux emitting devices respectively establishing mutually repelling magnetic fields extending from said axially spaced members on opposite axial sides of said armature, means respectively mounting said flux emitting devices within the axially spaced members for establishing a flux path through said armature common to both of said magnetic fields, and means for selectively collapsing one of the magnetic fields extending from one of the axially spaced members to effect axial displacement of the armature into engagement with the other of the axially spaced members, said armature being dimensionally restricted in an axial direction to substantially confine the magnetic fields between the axially spaced members to the common flux path through the armature.
Claim 3
Dependent Claim
25 words
The combination of claim 1 wherein one of the flux emitting devices comprises electromagnetic means for effecting collapse of said one of the magnetic fields.
Claim 4
Dependent Claim
26 words
The combination of claim 2 wherein the other of the flux emitting devices is a permanent magnet embedded in the other of the axially spaced members.
Claim 5
Dependent Claim
28 words
The combination of claim 3 wherein both of said magnetic fields are radially polarized in the same direction through the armature to effect said mutually repelling relationship therebetween.
Claim 6
Dependent Claim
48 words
The combination of claim 4 wherein said armature includes magnetically separated, radially inner and outer portions through which one of the magnetic fields extends, the other of the magnetic fields extending through only one of the inner and outer portions of the armature along said common flux path.
Claim 7
Dependent Claim
25 words
The combination of claim 5 including spring means for yieldably opposing displacement of the armature into engagement with said one of the axially spaced members.
Claim 8
Dependent Claim
48 words
The combination of claim 1 wherein said armature includes magnetically separated, radially inner and outer portions through which one of the magnetic fields extends, the other of the magnetic fields extending through only one of the inner and outer portions of the armature along said common flux path.
Claim 9
Dependent Claim
28 words
The combination of claim 7 wherein both of said magnetic fields are radially polarized in the same direction through the armature to effect said mutually repelling relationship therebetween.
Claim 10
Dependent Claim
25 words
The combination of claim 8 including spring means fOr yieldably opposing displacement of the armature into engagement with said one of the axially spaced members.
Claim 11
Dependent Claim
28 words
The combination of claim 1 wherein both of said magnetic fields are radially polarized in the same direction through the armature to effect said mutually repelling relationship therebetween.
Claim 12
Dependent Claim
155 words
In combination with a pair of axially spaced members and an armature axially displaceable into engagement with said members alternatively, torque transmitting control means comprising a pair of magnetic flux emitting devices respectively establishing mutually repelling magnetic fields extending from said axially spaced members on opposite axial sides of said armature, means respectively mounting said flux emitting devices within the axially spaced members for establishing a flux path through said armature common to both of said magnetic fields, and means for selectively collapsing one of the magnetic fields extending from one of the axially spaced members to effect axial displacement of the armature into engagement with the other of the axially spaced members, said armature including magnetically separated, radially inner and outer portions through which one of the magnetic fields extends, the other of the magnetic fields extending through only one of the inner and outer portions of the armature along said common flux path.
Claim 13
Dependent Claim
155 words
In combination with a pair of axially spaced members and an armature axially displaceable into engagement with said members alternatively, torque transmitting control means comprising a pair of magnetic flux emitting devices respectively establishing mutually repelling magnetic fields extending from said axially spaced members on opposite axial sides of said armature, means respectively mounting said flux emitting devices within the axially spaced members for establishing a flux path through said armature common to both of said magnetic fields, and means for selectively collapsing one of the magnetic fields extending from one of the axially spaced members to effect axial displacement of the armature into engagement with the other of the axially spaced members, said armature including magnetically separated, radially inner and outer portions through which one of the magnetic fields extends, the other of the magnetic fields extending through only one of the inner and outer portions of the armature along said common flux path.
Claim 14
Dependent Claim
25 words
The combination of claim 1 including spring means for yieldably opposing displacement of the armature into engagement with said one of the axially spaced members.
Claim 15
Dependent Claim
26 words
The combination of claim 1 wherein said axially spaced members are independently powered drivers, and including a driven member on which the armature is non-rotatably mounted.
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) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |