Sealed compressor and refrigeration device
US-2015369526-A1 · Dec 24, 2015 · US
Piston drive device
US9709049B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9709049-B2 |
| Application number | US-201514837499-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 27, 2015 |
| Priority date | Oct 23, 2014 |
| Publication date | Jul 18, 2017 |
| Grant date | Jul 18, 2017 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A piston drive device includes: a crankcase; first and second compression cylinders fixed to the crankcase; first and second vacuum cylinders fixed to the crankcase; a rotational shaft rotatably supported within the crankcase; first and second compression pistons connected to the rotational shaft and reciprocating respectively within the first and second compression cylinders; and first and second vacuum pistons connected to the rotational shaft and reciprocating respectively within the first and second vacuum cylinders; wherein each diameter of piston heads of the first and second compression pistons is smaller than each diameter of piston heads of the first and second vacuum pistons, and the first and second compression pistons are connected to the rotational shaft so as to sandwich the first and second vacuum pistons in an axial direction of the rotational shaft.
First claim
Opening claim text (preview).
What is claimed is: 1. A piston drive device comprising: a crankcase; first and second compression cylinders fixed to the crankcase; first and second vacuum cylinders fixed to the crankcase; a rotational shaft rotatably supported within the crankcase; first and second compression pistons connected to the rotational shaft and reciprocating respectively within the first and second compression cylinders; and first and second vacuum pistons connected to the rotational shaft and reciprocating respectively within the first and second vacuum cylinders, wherein: each diameter of piston heads of the first and second compression pistons is smaller than each diameter of piston heads of the first and second vacuum pistons, the first and second compression pistons are connected to the rotational shaft so as to sandwich the first and second vacuum pistons in an axial direction of the rotational shaft, reciprocation of the first vacuum piston introduces air into the crankcase, and reciprocation of the second vacuum piston introduces air into the crankcase, and within the crankcase, air introduced into the crankcase by the first vacuum piston is mixed with air introduced into the crankcase by the second vacuum piston. 2. The piston drive device of claim 1 , wherein first and second compression chambers are respectively formed within the first and second compression cylinders, capacities of the first and second compression chambers are increased and decreased by reciprocation of the first and second compression pistons, respectively, first and second vacuum chambers are respectively formed within the first and second vacuum cylinders, capacities of the first and second vacuum chambers are increased and decreased by reciprocation of the first and second vacuum pistons, respectively, the first and second compression pistons compress air introduced into the first and second compression chambers and discharge air outside the first and second compression chambers, respectively, and the first and second vacuum pistons discharge air, introduced into the first and second vacuum chambers, outside the first and second vacuum chambers, respectively. 3. The piston drive device of claim 1 , wherein there is a virtual plane being perpendicular to the rotational shaft and intersecting the piston heads of the first and second compression pistons and the first and second vacuum pistons. 4. The piston drive device of claim 1 , further comprising an outer rotor type motor driving the rotational shaft.
Assignees
Inventors
Classifications
- F04B39/0094Primary
crankshaft · CPC title
Pistons · CPC title
Cylinders · CPC title
Crankcases · CPC title
Casings · CPC title
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Frequently asked questions
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- What does patent US9709049B2 cover?
- A piston drive device includes: a crankcase; first and second compression cylinders fixed to the crankcase; first and second vacuum cylinders fixed to the crankcase; a rotational shaft rotatably supported within the crankcase; first and second compression pistons connected to the rotational shaft and reciprocating respectively within the first and second compression cylinders; and first and sec…
- Who is the assignee on this patent?
- Shinano Kenshi Co
- What technology area does this patent fall under?
- Primary CPC classification F04B39/0094. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Jul 18 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).