US3685923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automotive air conditioning compressor
Assignee: Motors Liquidation Co
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Filing: 1970-11-06
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Granted: 1972-08-22
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Expires: 1990-11-06
Abstract
Abstract In preferred form, a four cylinder radial compressor which is operated by an eccentric slider drive mechanism. Two pairs of cylinder bores are radially spaced 90* apart with the center lines of the cylinders lying in a common plane. Opposed pairs of pistons in the bores are linked together with sheet metal links that apply piston preload to an eccentric slider block for high speed continuous operation. The compressor is lubricated by oil that is carried by the refrigerant to the compressor. The refrigerant gas enters the compressor at the rear of the drive shaft and the suction return is diverted into the cylinder housing while the heavier oil enters an aligned hole in the shaft for distribution to the eccentric bearing and eccentric slider of the drive mechanism.
Inventors
- 👤 Everett C Hutchins
- 👤 Gary E Spencer
- 👤 Marion K Tucker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:08
CPC Classifications
F; F04; F04B; F04B27/00; F04B27/04; F04B27/053; F04B27/0404; F04B27/0428; F04B39/00; F04B39/0005; F04B39/0016; F04B39/02; F04B39/0223; F04B39/023; F04B39/0238; F04B39/0246
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
571 words
A rotary machine comprising a cylinder block having four cylinder bores formed therein, each of said cylinder bores having their centerline located in a common plane, a first pair of said cylinder bores being located coaxially with one another and at a perpendicular relationship with a second pair of said bores, a rear bearing housing on said cylinder block, a front bearing housing on said block, a rotary shaft directed through said block having the opposite ends thereon supported by said front and rear bearing housings, said shaft having an extension thereon adapted to extend outwardly of said front bearing housing for connection to a drive source, an eccentric throw on said shaft, said eccentric throw having an outer peripheral surface thereon located in said common plane of the centerlines of said cylinder bores, an annular needle bearing on said eccentric, a slider block slidably supported by said annular needle bearing, said slider block having a first pair of parallel sides thereon located coaxially of said first pair of bores and a second set of parallel sides thereon located in coaxial alignment with said second pair of bores, a piston in each of said bores, each of said pistons having a base portion thereon with a groove therein in which is supportingly received one of said parallel surfaces on said slider block, said eccentric throw being rotated by said shaft within said needle bearing to cause axial movement of said slider block with respect to each of said cylinder bores to cause each of said pistons to reciprocate within one of said cylinder bores, said slider block being moved by rotation of said eccentric laterally with respect to the groove in each of said pistons to provide a full-bearing support for said piston during reciprocation thereof within said bore thereby to prevent tilting movement of said pistons during reciprocable movement thereof within said bores, and means to preload each of said piston base portions against one of said parallel sides of said slider block including a first pair of spaced apart flat sheet metal links located on opposite sides of said slider block, each of said links having a central portion offset from said shaft and opposite ends colinear with each other and with the axis of said shaft, means joining said opposite ends to said first pair of pistons together, each of said links being pre-stressed to a predetermined length between its opposite ends to locate said pistons to hold the grooved base portions of said first pistons in close sliding fit engagement with said first pair of parallel sides of said slider block, said preloading means including a second pair of flat sheet metal links located on opposite sides of said slider block, each of said links having a central portion offset from said shaft and opposite ends colinear with each other and with the axis of said shaft, means joining said opposite ends of said second pair of links to said second pair of pistons, each of said links being pre-stressed to a predetermined length between its opposite ends to locate said pistons to hold the grooved base portions of said second pair of pistons in close sliding fit engagement with said second pair of parallel sides on said slider block there to maintain said slider block and the grooves in said piston continuously in close sliding engagement upon opposite reciprocation of said pistons within said cylinder bores.
Claim 2
Dependent Claim
571 words
A rotary machine comprising a cylinder block having four cylinder bores formed therein, each of said cylinder bores having their centerline located in a common plane, a first pair of said cylinder bores being located coaxially with one another and at a perpendicular relationship with a second pair of said bores, a rear bearing housing on said cylinder block, a front bearing housing on said block, a rotary shaft directed through said block having the opposite ends thereon supported by said front and rear bearing housings, said shaft having an extension thereon adapted to extend outwardly of said front bearing housing for connection to a drive source, an eccentric throw on said shaft, said eccentric throw having an outer peripheral surface thereon located in said common plane of the centerlines of said cylinder bores, an annular needle bearing on said eccentric, a slider block slidably supported by said annular needle bearing, said slider block having a first pair of parallel sides thereon located coaxially of said first pair of bores and a second set of parallel sides thereon located in coaxial alignment with said second pair of bores, a piston in each of said bores, each of said pistons having a base portion thereon with a groove therein in which is supportingly received one of said parallel surfaces on said slider block, said eccentric throw being rotated by said shaft within said needle bearing to cause axial movement of said slider block with respect to each of said cylinder bores to cause each of said pistons to reciprocate within one of said cylinder bores, said slider block being moved by rotation of said eccentric laterally with respect to the groove in each of said pistons to provide a full-bearing support for said piston during reciprocation thereof within said bore thereby to prevent tilting movement of said pistons during reciprocable movement thereof within said bores, and means to preload each of said piston base portions against one of said parallel sides of said slider block including a first pair of spaced apart flat sheet metal links located on opposite sides of said slider block, each of said links having a central portion offset from said shaft and opposite ends colinear with each other and with the axis of said shaft, means joining said opposite ends to said first pair of pistons together, each of said links being pre-stressed to a predetermined length between its opposite ends to locate said pistons to hold the grooved base portions of said first pistons in close sliding fit engagement with said first pair of parallel sides of said slider block, said preloading means including a second pair of flat sheet metal links located on opposite sides of said slider block, each of said links having a central portion offset from said shaft and opposite ends colinear with each other and with the axis of said shaft, means joining said opposite ends of said second pair of links to said second pair of pistons, each of said links being pre-stressed to a predetermined length between its opposite ends to locate said pistons to hold the grooved base portions of said second pair of pistons in close sliding fit engagement with said second pair of parallel sides on said slider block there to maintain said slider block and the grooves in said piston continuously in close sliding engagement upon opposite reciprocation of said pistons within said cylinder bores.
Claim 3
Dependent Claim
458 words
In a reciprocating compressor the combination of a body with a plurality of cylindrical bores therein, a suction space in said body, a plurality of discharge passageways formed in said body radially outwardly of said suction space in spaced circumferential relationship therearound, a rear bearing housing secured to said body for closing said suction space therein, a front bearing housing secured to said housing, a rotary drive shaft, bearing means in said front bearing housing and said rear bearing housing for supporting said shaft within said body for rotation with respect thereto, an eccentric throw secured to said shaft for rotation therewith, said throw being located within said suction space, a bearing supported on the outer surface of said throw rotatable therewith, a slider block having a central opening receiving said bearing, said bearing and throw driving said block through oscillating movement with respect to the longitudinal axis of said drive shaft, said block including a plurality of flat surfaces on the outer periphery thereof, a piston in each of said cylinder bores having a base portion thereon formed aS a flat surface, each of said base portion surfaces engaging one of said slider surfaces on said slider block for sliding movement therebetween upon oscillatory movement of said slider block about the longitudinal axis of said drive shaft, a pin directed through each of said pistons, a link member having one end thereof connected to one end of a pin in one of said pistons and having the opposite end thereof connected to the end of a pin in another one of said pistons, a second link member having one end thereof connected to the opposite end of the pin in the one piston and the opposite end thereof connected to the opposite end of the pin in the another one of said pistons, said first and second links having a central portion thereon offset from the connected ends of each of said links on either side of said shaft, each of said links prestressed between its connected ends to a length to hold said first and second pistons against said slider block to maintain a close sliding fit therebetween upon rotation of the shaft, said slider block surfaces moving axially of and laterally of each of said bores during oscillation of said slider block about said drive shaft during rotation thereof to produce reciprocation of said first piston into and out of its cylinder bore in a direction opposite to the reciprocation of said second piston within its cylinder bore and serving to define a flat surface support for said pistons at the base thereof to prevent tipping movement of said pistons with respect to said cylinder bores during opposite reciprocation of said pistons within said bores.
Claim 4
Dependent Claim
458 words
In a reciprocating compressor the combination of a body with a plurality of cylindrical bores therein, a suction space in said body, a plurality of discharge passageways formed in said body radially outwardly of said suction space in spaced circumferential relationship therearound, a rear bearing housing secured to said body for closing said suction space therein, a front bearing housing secured to said housing, a rotary drive shaft, bearing means in said front bearing housing and said rear bearing housing for supporting said shaft within said body for rotation with respect thereto, an eccentric throw secured to said shaft for rotation therewith, said throw being located within said suction space, a bearing supported on the outer surface of said throw rotatable therewith, a slider block having a central opening receiving said bearing, said bearing and throw driving said block through oscillating movement with respect to the longitudinal axis of said drive shaft, said block including a plurality of flat surfaces on the outer periphery thereof, a piston in each of said cylinder bores having a base portion thereon formed aS a flat surface, each of said base portion surfaces engaging one of said slider surfaces on said slider block for sliding movement therebetween upon oscillatory movement of said slider block about the longitudinal axis of said drive shaft, a pin directed through each of said pistons, a link member having one end thereof connected to one end of a pin in one of said pistons and having the opposite end thereof connected to the end of a pin in another one of said pistons, a second link member having one end thereof connected to the opposite end of the pin in the one piston and the opposite end thereof connected to the opposite end of the pin in the another one of said pistons, said first and second links having a central portion thereon offset from the connected ends of each of said links on either side of said shaft, each of said links prestressed between its connected ends to a length to hold said first and second pistons against said slider block to maintain a close sliding fit therebetween upon rotation of the shaft, said slider block surfaces moving axially of and laterally of each of said bores during oscillation of said slider block about said drive shaft during rotation thereof to produce reciprocation of said first piston into and out of its cylinder bore in a direction opposite to the reciprocation of said second piston within its cylinder bore and serving to define a flat surface support for said pistons at the base thereof to prevent tipping movement of said pistons with respect to said cylinder bores during opposite reciprocation of said pistons within said bores.
Claim 5
Dependent Claim
375 words
In a reciprocating compressor the combination of, a central body, a plurality of radially outwardly directed cylinder bores in said body spaced 90* apart, the centerline of each of said cylinder bores lying in a common plane, a separate piston in each of said cylinder bores, a rotary drive shaft for said pistons, means for supporting said drive shaft for rotation with respect to said body, a common eccentric on said shaft for actuating each of said pistons, a slider block operated by said common eccentric, a flat surface on said slider block in alignment with each of said pistons, means forming a flat follower surface on each of said pistons supportingly engaged by said flat surface on said slider block, a first pair of said pistons located coaxially of one another, a first pair of flat sheet metal connecting links located on each side of said second pair of pistons, each of said links having a center portion offset from said shaft and ends secured to said first pair of pistons, each of said links being prestressed to a predetermined length between its opposite ends to locate said pistons together against said slider block, a second pair of said pistons located coaxially of one another and at right angles to said first pair, a second pair of flat sheet metal connecting links located on each side of said second pair of pistons, each of said links having a center portion offset from said shaft and ends secured to said second pair of pistons, each of said links being prestressed to a predetermined length between its opposite ends to locate said second pair of pistons together against said slider block, said first and second pairs of sheet metal connecting links maintaining the follower surface on each of said pistons in close sliding fit relationship with the flat surfaces on said slider block to produce opposite reciprocation of each of said pistons within its cylinder bore upon rotation of said shaft, said slider block flat surface moving laterally and axially of said piston during reciprocation thereof to define a stable supporting surface for said piston to prevent tipping movements thereof with respect to the cylinder bore during opposite reciprocation of said first and second piston pairs.
Claim 6
Dependent Claim
375 words
In a reciprocating compressor the combination of, a central body, a plurality of radially outwardly directed cylinder bores in said body spaced 90* apart, the centerline of each of said cylinder bores lying in a common plane, a separate piston in each of said cylinder bores, a rotary drive shaft for said pistons, means for supporting said drive shaft for rotation with respect to said body, a common eccentric on said shaft for actuating each of said pistons, a slider block operated by said common eccentric, a flat surface on said slider block in alignment with each of said pistons, means forming a flat follower surface on each of said pistons supportingly engaged by said flat surface on said slider block, a first pair of said pistons located coaxially of one another, a first pair of flat sheet metal connecting links located on each side of said second pair of pistons, each of said links having a center portion offset from said shaft and ends secured to said first pair of pistons, each of said links being prestressed to a predetermined length between its opposite ends to locate said pistons together against said slider block, a second pair of said pistons located coaxially of one another and at right angles to said first pair, a second pair of flat sheet metal connecting links located on each side of said second pair of pistons, each of said links having a center portion offset from said shaft and ends secured to said second pair of pistons, each of said links being prestressed to a predetermined length between its opposite ends to locate said second pair of pistons together against said slider block, said first and second pairs of sheet metal connecting links maintaining the follower surface on each of said pistons in close sliding fit relationship with the flat surfaces on said slider block to produce opposite reciprocation of each of said pistons within its cylinder bore upon rotation of said shaft, said slider block flat surface moving laterally and axially of said piston during reciprocation thereof to define a stable supporting surface for said piston to prevent tipping movements thereof with respect to the cylinder bore during opposite reciprocation of said first and second piston pairs.
Claim 7
Dependent Claim
481 words
A compressor having a central body with a plurality of radially outwardly directed cylinder bores therein, a piston in each of said bores slidably reciprocable with respect thereto, said body includinG a suction space located centrally thereof and radially inwardly of said bores, a plurality of discharge openings in said body located radially outwardly of said suction space in spaced circumferential relationship therearound, means for communicating said suction space and said discharge openings with said bores, a rear bearing housing secured to said body including means thereon closing said suction space in said body, a front bearing housing on said body, a rotary shaft having the opposite ends thereof supportingly received in said rear and front bearing housings, drive means for operatively connecting each of said pistons in said radial bores to said shafts for causing opposite reciprocation of each of said pistons within one of said radial bores during rotation of said shaft, said drive means including an eccentric throw on said shaft, a bearing on the outer periphery of said throw, a slider block supportingly received on the bearing having a portion thereon slidably engaging said pistons at an interface for causing the opposite reciprocation thereof, means for lubricating said bearing and a sliding interface between said slider block and each of said pistons, said lubricating means including a suction port in said rear bearing housing formed coaxially of the end of said shaft supported by said rear bearing housing, said rear bearing housing having a transition bore aligned with said suction port for reducing velocity of inlet gas from said suction port, a large diameter opening in the supported end of said rotary shaft coaxially aligned with said suction port and transition bore and facing in the direction of inlet gas flow through said suction port to separate and intercept lubricants suspended therein, a longitudinal passageway in said shaft for receiving separated lubricant from the large diameter opening, a transverse passageway in said shaft receiving oil from the longitudinal passageway to said bearing, and being rotated by said shaft to distribute oil in a radial direction, said slider block including a plurality of radially outwardly directed openings therein for directing oil from said bearing to the sliding interface between said slider block and each of said pistons and into said suction space for lubricating the surface during rotation of said shaft, said rear bearing housing including a pair of side ports intersected and communicated with said transition bore and said suction space, said side ports formed at an angle with respect to the longitudinal axis of said transition bore on either side thereof for receiving gas from the suction port and directing it to the suction space in said body, and suction valve means in each of said pistons for passage of gas and lubricant from the suction space of said body into each of said radial bores.
Claim 8
Dependent Claim
481 words
A compressor having a central body with a plurality of radially outwardly directed cylinder bores therein, a piston in each of said bores slidably reciprocable with respect thereto, said body includinG a suction space located centrally thereof and radially inwardly of said bores, a plurality of discharge openings in said body located radially outwardly of said suction space in spaced circumferential relationship therearound, means for communicating said suction space and said discharge openings with said bores, a rear bearing housing secured to said body including means thereon closing said suction space in said body, a front bearing housing on said body, a rotary shaft having the opposite ends thereof supportingly received in said rear and front bearing housings, drive means for operatively connecting each of said pistons in said radial bores to said shafts for causing opposite reciprocation of each of said pistons within one of said radial bores during rotation of said shaft, said drive means including an eccentric throw on said shaft, a bearing on the outer periphery of said throw, a slider block supportingly received on the bearing having a portion thereon slidably engaging said pistons at an interface for causing the opposite reciprocation thereof, means for lubricating said bearing and a sliding interface between said slider block and each of said pistons, said lubricating means including a suction port in said rear bearing housing formed coaxially of the end of said shaft supported by said rear bearing housing, said rear bearing housing having a transition bore aligned with said suction port for reducing velocity of inlet gas from said suction port, a large diameter opening in the supported end of said rotary shaft coaxially aligned with said suction port and transition bore and facing in the direction of inlet gas flow through said suction port to separate and intercept lubricants suspended therein, a longitudinal passageway in said shaft for receiving separated lubricant from the large diameter opening, a transverse passageway in said shaft receiving oil from the longitudinal passageway to said bearing, and being rotated by said shaft to distribute oil in a radial direction, said slider block including a plurality of radially outwardly directed openings therein for directing oil from said bearing to the sliding interface between said slider block and each of said pistons and into said suction space for lubricating the surface during rotation of said shaft, said rear bearing housing including a pair of side ports intersected and communicated with said transition bore and said suction space, said side ports formed at an angle with respect to the longitudinal axis of said transition bore on either side thereof for receiving gas from the suction port and directing it to the suction space in said body, and suction valve means in each of said pistons for passage of gas and lubricant from the suction space of said body into each of said radial bores.
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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) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |