US3871793A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automotive refrigeration compressor module
Assignee: Individual
•
Filing: 1973-12-28
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Granted: 1975-03-18
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Expires: 1993-12-28
Abstract
Abstract An automotive refrigeration compressor module is provided of optimally minimum size for a given capacity and is of the reciprocating rectangular piston type. The piston is driven by a drive block within the piston mounted on the eccentric of a crankshaft. An internal counterbalance is mounted in the suction chamber to facilitate size reduction of the compression chamber and an external counterbalance is provided on the outer end of the crankshaft integrated with the drive clutch for the compressor. A dual module unit of twice the capacity of the single module is also provided. Both embodiments utilize refrigerant entrained oil for lubrication and include galleries in the crankshaft and drive block to effect complete circulation of the lubricant to all the moving parts. Insertable bearing shim construction is provided to preclude the need for close tolerance machining of adjacent major moving parts and to keep cost to a minimum.
Inventors
- 👤 Jr John W Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:15
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/12; F04B27/00; F04B27/02; F04B39/02; F04B39/0223; F04B39/023; F04B39/0238
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
304 words
A compressor for automotive refrigeration system comprising: at least one compressor module having a housing, said housing including a first housing section defining a substantially rectangular compression chamber bounded on each end by second and third housing sections defining discharge and suction chambers internally thereof, respectively; a hollow substantially rectangular piston means in said compression chamber of a said module for reciprocation therein; suction port means and discharge port means formed within said housing and interconnencting said compression chamber of a said module at opposite ends thereof with said suction and discharge chambers, respectively; suction valve means within said compression chamber of a said module at said opposite ends thereof opening and closing said suction port means in response to reciprocation of said piston means; discharge valve means within said discharge chamber of a saId module opening and closing said discharge port means in reverse order from said suction port means in response to reciprocation of said piston means; a shaft seal extension on said housing; a crankshaft extending through said housing and said piston means from a point external to said shaft seal extension to at least a point internal of said suction chamber; first bearing means in said second housing section and second bearing means journalling said crankshaft for rotation in said housing; a first counterweight means mounted on said crankshaft for rotation therewith in said suction chamber; a second counterweight means and integral drive clutch means mounted on the outboard end of said crankshaft externally of said shaft seal extension; said crankshaft having an eccentric portion rotatable within said piston means; and drive block means mounted on said eccentric portion within said piston means and imparting alternating thrust thereto to reciprocate said piston means in said compression chamber between said two ends thereof in response to rotation of said crankshaft means.
Claim 2
Dependent Claim
304 words
A compressor for automotive refrigeration system comprising: at least one compressor module having a housing, said housing including a first housing section defining a substantially rectangular compression chamber bounded on each end by second and third housing sections defining discharge and suction chambers internally thereof, respectively; a hollow substantially rectangular piston means in said compression chamber of a said module for reciprocation therein; suction port means and discharge port means formed within said housing and interconnencting said compression chamber of a said module at opposite ends thereof with said suction and discharge chambers, respectively; suction valve means within said compression chamber of a said module at said opposite ends thereof opening and closing said suction port means in response to reciprocation of said piston means; discharge valve means within said discharge chamber of a saId module opening and closing said discharge port means in reverse order from said suction port means in response to reciprocation of said piston means; a shaft seal extension on said housing; a crankshaft extending through said housing and said piston means from a point external to said shaft seal extension to at least a point internal of said suction chamber; first bearing means in said second housing section and second bearing means journalling said crankshaft for rotation in said housing; a first counterweight means mounted on said crankshaft for rotation therewith in said suction chamber; a second counterweight means and integral drive clutch means mounted on the outboard end of said crankshaft externally of said shaft seal extension; said crankshaft having an eccentric portion rotatable within said piston means; and drive block means mounted on said eccentric portion within said piston means and imparting alternating thrust thereto to reciprocate said piston means in said compression chamber between said two ends thereof in response to rotation of said crankshaft means.
Claim 3
Dependent Claim
50 words
The invention defined in claim 1, wherein said drive clutch means further includes a driven clutch plate integrally mounted with said second counterweight means on said crankshaft and a pulley driven clutch plate and clutch activating means mounted for rotation on said shaft housing extension adjacent said driven clutch plate.
Claim 4
Dependent Claim
98 words
The invention defined in claim 1, wherein said drive block and said piston means are machined to relatively loose tolerances with said interior of said piston means and said interior of said compression chamber, respectively, and said compressor further includes insertable opposed bearing rails removably mounted within said interior of said piston means and said interior of said compression chamber providing selectively close running clearances between said drive block and said piston means and between said piston means and said compression chamber, thereby precluding the need for close initial tolerances between the major moving parts of said compressor.
Claim 5
Dependent Claim
102 words
The invention defined in claim 1, wherein said compressor includes lubrication means for conveying refrigerant entrained lubricant to the moving parts thereof, said lubrication means including: an axially disposed oil gallery in said crankshaft extending from said shaft extension housing to said suction chamber; an annular oil gallery in said drive block around said eccentric portion of said crankshaft; a branch oil gallery in said eccentric portion of said crankshaft interconnecting said axial and said annular galleries; and oil port means formed in said drive block interconnecting said annular gallery with the juxtaposed surface of said drive block and said piston means.
Claim 6
Dependent Claim
65 words
The invention defined in claim 4, wherein said piston means further includes overlapping compression seals extending about the periphery of each of said piston means; and wherein entrained lubricant blown by said seals during the compression stroke of said piston and ingested into said suction chamber circulates through said bearing means and said oil galleries to effect lubrication of said moving parts of said compressor.
Claim 7
Dependent Claim
107 words
The invention defined in claim 3, wherein said compressor includes lubrication means for conveying refrigerant entrained lubricant to the moving parts thereof, said lubrication means including: an axially disosed oil gallery in said crankshaft extending from said shaft extension housing to said suction chamber; an annular oil gallery in said drive block around said eccentric portion of said crankshaft; a branch oil gallery in said eccentric portion of said crankshaft interconnecting said axial and said annular galleries; and oil port means formed in said drive block interconnecting said annular gallery with the juxtaposed surfaces of said drive block and said insertable bearing rails within said piston means.
Claim 8
Dependent Claim
66 words
The inveNtion defined in claim 3, wherein said piston means further includes overlapping compression seals extending about the periphery of each end of said piston means; and wherein entrained lubricant blown by said seals during the compression stroke of said piston and ingested into said suction chamber circulates through said bearing means and said oil galleries to effect lubrication of said moving parts of said compressor.
Claim 9
Dependent Claim
102 words
The invention defined in claim 2, wherein said compressor includes lubrication means for conveying refrigerant entrained lubricant to the moving parts thereof, said lubrication means including: an axially disposed oil gallery in said crankshaft extending from said shaft extension housing to said suction chamber; an annular oil gallery in said drive block around said eccentric portion of said crankshaft; a branch oil gallery in said eccentric portion of said crankshaft interconnecting said axial and said annular galleries; and oil port means formed in said drive block interconnecting said annular gallery with the juxtaposed surfaces of said drive block and said piston means.
Claim 10
Dependent Claim
66 words
The invention defined in claim 8, wherein said piston means further includes overlapping compression seals extending about the periphery of each end of said piston means; and wherein entrained lubricant blown by said seals during the compression stroke of said piston and ingested into said suction chamber circulates through said bearing means and said oil galleries to effect lubrication of said moving parts of said compressor.
Claim 11
Dependent Claim
150 words
The invention defined in claim 3, wherein said drive clutch means further includes a driven clutch plate integrally mounted with said second counterweight means on said crankshaft and a pulley driven clutch plate and clutch activating means mounted for rotation on said shaft housing extension adjacent said driven clutch plate; said compressor includes lubrication means for conveying refrigerant entrained lubricant to the moving parts thereof, said lubrication means including: an axially disposed oil gallery in said crankshaft extending from said shaft extension housing to said suction chamber; an annular oil gallery in said drive block around said eccentric portion of said crankshaft; a branch oil gallery in said eccentric portion of said crankshaft interconnecting said axial and said annular galleries; and oil port means formed in said drive block interconnecting said annular gallery with the juxtaposed surfaces of said drive block and said insertable bearing rails within said piston means.
Claim 12
Dependent Claim
66 words
The invention defined in claim 10, wherein said piston means further includes overlapping compression seals extending about the periphery of each end of said piston means; and wherein entrained lubricant blown by said seals during the compression stroke of said piston and ingested into said suction chamber circulates through said bearing means and said oil galleries to effect lubrication of said moving parts of said compressor.
Claim 13
Dependent Claim
134 words
The invention defined in claim 1, wherein said compressor includes at least two compressor modules having a common suction chamber in said third housing section; a fourth housing section adjacent thereto defining a second compression chamber therein with a second said piston and drive block means; a fifth housing section on the outboard side of said second compression chamber defining a discharge chamber therein for said second compression chamber; a common crankshaft for said modules extending therethrough into said fifth housing section; and said second bearing means journalling the inboard end of said crankshaft for rotation in said fifth housing section; said crankshaft means having a said eccentric portion in each of said compression chambers on each of which is mounted one of said drive block means for reciprocating one of said pistons therein.
Claim 14
Dependent Claim
98 words
The invention defined in claim 12, wherein said drive block and said piston means are machined to relatively loose tolerances with said interior of said piston means and said interior of said compression chamber, respectively, and said compressor further includes insertable opposed bearing rails removably mounted within said interior of said piston means and said interior of said compression chamber providing selectively close running clearances between said drive block and said piston means and between said piston means and said compression chamber, thereby precluding the need for close initial tolerances between the major moving parts of said compressor.
Claim 15
Dependent Claim
112 words
The invention defined in claim 12, wherein said compressor includes lubrication means for conveying refrigerant entrained lubricant to the moving parts thereof, said lubrication means including: axially disposed oil gallery means in said crankshaft extending from within said second and fifth housing sections to said suction chamber; an annular oil gallery in each said drive block means around an adjacent said eccentric portion of said crankshaft; a branch oil gallery in each said eccentric portion of said crankshaft interconnecting said axial and said annular galleries; and oil port means formed in said drive block means interconnecting each said annular gallery with the juxtaposed surfaces of said drive block and said piston means.
Claim 16
Dependent Claim
67 words
The invention defined in claim 14, wherein each said piston means further includes overlapping compression seals extending about the periphery of each end of said piston means; and wherein entrained lubricant blown by said seals during the compression stroke of said piston and ingested into said suction chamber circulates through said bearing means and said oil galleries to effect lubrication of said moving parts of said compressor.
Claim 17
Dependent Claim
116 words
The invention defined in claim 13, wherein said compressor includes lubrication means for conveying refrigerant entrained lubricant to the moving parts thereof, said lubrication means including: axially disposed oil gallery means in said crankshaft extending from within said second and fifth housing sections to said suction chamber; an annular oil gallery in each said drive block means around an adjacent said eccentric portion of said crankshaft; a branch oil gallery in each said eccentric portion of said crankshaft interconnecting said axial and said annular galleries; and oil port means formed in said drive block interconnecting each said annular gallery with the juxtaposed surfaces of said drive block and said insertable bearing rails within said piston means.
Claim 18
Dependent Claim
67 words
The invention defined in claim 13 wherein each said piston means further includes overlapping compression seals extending about the periphery of each end of said piston means; and wherein entrained lubricant blown by said seals during the compression stroke of said piston and ingested into said suction chamber circulates through said bearing means and said oil galleries to effect lubrication of said moving parts of said compressor.
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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) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |