Expansible chamber devices – With lubricating means – Piston has lubricant retaining or conducting means
Reexamination Certificate
2005-08-16
2005-08-16
Nguyen, Hoang (Department: 3748)
Expansible chamber devices
With lubricating means
Piston has lubricant retaining or conducting means
C092S174000, C092S208000
Reexamination Certificate
active
06928921
ABSTRACT:
A piston for a compressor for use in hermetically encapsulated small-type refrigerating machines, with a cylinder-jacket-like sealing and guide surface section (1a, 2) as well as at least two substantially bridge- and cylinder-jacket-sector-like sealing and guide surface sections (6) of the piston skirt allowing the guidance of the piston in the cylinder as well as sealing the crankcase relative to the sealing or compression chamber and other sections of the piston skirt comprising a recess (3, 7). In order to provide a piston which despite being partially led out of from the cylinder housing during a working stroke can easily be re-introduced into the same, wherein nevertheless friction- and weight-reducing recesses are provided on the piston skirt and a sufficient guidance of the piston is guaranteed, it is provided that the angle (α) between the connecting lines of the boundary edges (9a, 9b) of each bridge-like and cylinder-jacket-sector-like sealing and guide surface section (6), which boundary edges extend in the axial direction of the piston, is smaller than 40°, preferably smaller than 30° with the associated rotational axis (8).
REFERENCES:
patent: 2863707 (1958-12-01), Lengnick
patent: 4350083 (1982-09-01), Gannaway
patent: 4809591 (1989-03-01), Rhodes
patent: 4817505 (1989-04-01), Rhodes
patent: 4903580 (1990-02-01), Bruni
patent: 5074264 (1991-12-01), Mielke
patent: 5172626 (1992-12-01), Hart
patent: 5713262 (1998-02-01), Sugiyama et al.
patent: 3432369 (1985-03-01), None
patent: 4109160 (1992-09-01), None
patent: 0072228 (1983-02-01), None
patent: 0373516 (1990-06-01), None
patent: 0780572 (1997-06-01), None
patent: 2076799 (1997-10-01), None
Collard & Roe P.C.
Nguyen Hoang
Verdichter Oe Ges.m.b.H.
LandOfFree
Piston bore does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Piston bore, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Piston bore will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3443977