Pumps – Motor driven – Resiliently mounted pump or motor
Reexamination Certificate
1999-03-01
2001-01-09
Thorpe, Timothy S. (Department: 3746)
Pumps
Motor driven
Resiliently mounted pump or motor
C417S053000, C417S902000
Reexamination Certificate
active
06171077
ABSTRACT:
The present invention relates to hermetic compressors, particularly reciprocating piston hermetic compressors, and methods for their assembly.
Reciprocating piston hermetic compressors presently known and widely utilized typically have their motor and compression mechanism subassemblies suspended or supported within their housings by a plurality of springs. Suspension springs for such compressors are attached between supports distributed about and connected to the interior of the housing and portions of the motor and compression mechanism subassembly, such as the frame thereof.
With reference to the above presently existing and utilized supports for such suspension springs, previous compressors often require the use of a spring support having two parts in order to facilitate easy and convenient assembly of the compressor.
On the other hand, there presently exist hermetic compressor units in which each suspension spring support consists of only one part, but which require additional radial space between the interior of the housing and the compressor subassembly frame in order to accommodate easy and convenient assembly of the compressor. This is because the respective supports are already bent into their configuration before being attached to the interior of the housing before installation of the motor and compression mechanism subassembly thereinto.
SUMMARY OF THE INVENTION
The suspension spring support of the present invention and the inventive method of assembling such compressors overcome the above-mentioned drawbacks. The inventive support is able to combine, under conditions of extraordinary equilibrium, the positive characteristics of both types of known supports but is not affected by their respective drawbacks.
In other words, the suspension spring support of the present invention is made as a whole, single part for each suspension spring, but does not require either additional radial space between the interior of the housing and the motor and compression mechanism subassembly, or any movement of the compressor assembly at the place and time of installation of the motor and compression mechanism subassembly.
The inventive spring support referred to, therefore, is essentially made of a single stamped part that, during its stamping is not completely bent into its specific and definitive configuration, this being done only at the time of the installation of the motor and compression mechanism subassembly into the housing, its final configuration being obtained with the use of manual or automatic tools, as the compressor assembly moves on the production line.
The present invention provides a hermetic compressor assembly including a housing, a compression mechanism, an electric motor in driving communication with the compression mechanism, the motor and compression mechanism comprising a subassembly installed in said housing, and a plurality of spring supports of single-piece construction and having first and second portions and a border therebetween. The first portion is attached to said housing and the second portion has an arcuate opening at the border, such that the second portion can be bent inwardly at the border. A suspension spring is attached to each spring support and extends between the respective support second portion and the subassembly and is attached to the subassembly.
The present invention also provides a method for assembling a hermetic compressor and has the steps of: providing a housing, a compression mechanism and electric motor subassembly, a plurality of spring supports having first and second portions, and a plurality of suspension springs; attaching the first portion of each support to the housing; installing the subassembly into the housing past the spring supports; then bending the supports between their first and second portions in a radially inward direction; attaching the springs to the respective second support portions; and then attaching the springs to the subassembly. The subassembly is thus supported within the housing by the supports through the springs.
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Calciolari Leonelo Antonio
Silva Jos{acute over (e)} Mario
Baker & Daniels
Gray Michael K.
Tecumseh Products Company
Thorpe Timothy S.
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