1. A double-sided hand hack saw blade comprising:
a blade body defining a first end and a second end; and
a first cutting edge defined by a plurality of cutting teeth located on one side of the blade body and defining a first tooth set pattern, and a second cutting edge defined by a plurality of cutting teeth located on an opposite side of the blade body relative to the one side of the blade body and defining a second tooth set pattern;
wherein the first tooth set pattern and the second tooth set pattern are (i) timed to each other or (ii) approximately 180 degrees out of phase with respect to one another.
2. A double-sided hand hack saw blade as defined in claim 1, wherein the first and second tooth set patterns define wavy tooth set patterns.
3. A double-sided hand hack saw blade as defined in claim 2, wherein the location of each tooth on the first cutting edge relative to a reference point on the blade body is in time with the location of each corresponding tooth on the second cutting edge relative to said reference point on the blade body.
4. A double-sided hand hack saw blade as defined in claim 3, wherein the first cutting edge defines a first tooth pitch or tooth location, the second cutting edge defines a second tooth pitch or tooth location, the first tooth wavy set pattern is timed to the first tooth pitch or tooth location, the second tooth wavy set pattern is timed to the second tooth pitch or tooth location, and the first tooth wavy set pattern is timed to the second tooth wavy set pattern.
5. A double-sided hand hack saw blade as defined in claim 2, wherein the first cutting edge defines a plurality of first points of maximum set magnitude axially spaced relative to each other, the second cutting edge defines a plurality of second points of maximum set magnitude axially spaced relative to each other, and each first point of maximum set magnitude is either aligned with or approximately 180 degrees out of phase with a respective second point of maximum set magnitude.
6. A double-sided hand hack saw blade as defined in claim 5, wherein the first cutting edge defines a plurality of first points of maximum right set magnitude axially spaced relative to each other and a plurality of first points of maximum left set magnitude axially spaced relative to each other, the second cutting edge defines a plurality of second points of maximum right set magnitude axially spaced relative to each other and a plurality of second points of maximum left set magnitude axially spaced relative to each other, each first point of maximum right set magnitude is either aligned with or approximately 180 degrees out of phase with a respective second point of maximum right set magnitude, and each first point of maximum left set magnitude is either aligned with or approximately 180 degrees out of phase with a respective second point of maximum left set magnitude.
7. A double-sided hand hack saw blade as defined in claim 2, wherein the first cutting edge defines a first wavy set pattern to tooth pitch timing, the second cutting edge defines a second wavy set pattern to tooth pitch timing, and the first wavy set pattern to tooth pitch timing is approximately the same as the second wavy set pattern to tooth pitch timing.
8. A double-sided hand hack saw blade as defined in claim 7, wherein a first tooth of the first wavy set pattern is indexed a first distance with respect to a reference point on the blade, a first tooth of the second wavy set pattern is indexed a second distance with respect to said reference point on the blade, and the first distance is approximately equal to the second distance to thereby time the first wavy set pattern to tooth pitch, time the second wavy set pattern to tooth pitch, and set such timing on the first and second sides of the blade approximately equal to each other.
9. A double-sided hand hack saw blade as defined in claim 3, wherein the first tooth set pattern defines at least one first point of maximum set magnitude and the second tooth set pattern defines at least one second point of maximum set magnitude, and the at least one first point of maximum set magnitude is either aligned with or approximately 180 degrees out of phase with the at least one second point of maximum set magnitude.
10. (canceled)
11. (canceled)
12. (canceled)
13. (canceled)
14. A double-sided hand hack saw blade comprising:
a blade body defining a first end and a second end; and
first means for cutting located on one side of the blade body defining a first wavy set pattern and second means for cutting located on an opposite side of the blade body defining a second wavy set pattern;
wherein the first wavy set pattern and the second wavy set pattern are either (i) timed with each other or (ii) approximately 180 degrees out of phase with respect to one another.
15. (canceled)
16. A double-sided hand hack saw blade as defined in claim 14, wherein the first means includes third means for cutting located along the first means indexed to a designated reference point along the blade body, and the second means includes fourth means for cutting located along the second means that is equally indexed to the same designated reference point along the blade body.
17. (canceled)
18. A method comprising the steps of:
mounting at least one blade body in a milling fixture;
milling first and second cutting edges defined by a plurality of teeth along opposing edges of the at least one blade body;
removing the at least one blade from the milling fixture and placing the at least one blade into a setting die; and
substantially simultaneously setting the teeth on the first and second cutting edges and, in turn, forming a first tooth set pattern of teeth on the first cutting edge and a second tooth set pattern of teeth on the second cutting edge.
19. A method according to claim 18, further comprising forming a plurality of blade bodies in separate piece form wherein each separate piece defines a respective blade body.
20. A method according to claim 19, wherein the step of forming a plurality of blade bodies comprises forming each blade body piece from a tri-metal strip and the step of forming the at least one blade body from the metal strip comprises die cutting the at least one blade body from the strip.
21. (canceled)
22. A method according to claim 20, wherein the setting step comprises setting the first and second cutting edges such that the first tooth set pattern and the second tooth set pattern are (i) timed with each another or (ii) approximately 180 degrees out of phase with respect to one another.
23. A method according to claim 20, wherein the setting step comprises forming a first wavy tooth set pattern of teeth on the first cutting edge and a second wavy tooth set pattern on the second cutting edge.
24. A method according to claim 20, wherein the milling step comprises milling the first cutting edge along a first side of the at least one blade body, flipping the milling fixture, and milling the second cutting edge along an opposing second side of the at least one blade body.
25. A method according to claim 24, wherein the step of milling the first cutting edge comprises indexing a first tooth of the plurality of teeth of the first cutting edge relative to a designated reference point along the at least one blade body, and the step of milling the second cutting edge comprises equally indexing a first tooth of the plurality of teeth of the second cutting edge relative to the same reference point along the at least one blade body.
26. A method according to claim 20, wherein the setting step comprises seating the at least one blade in a first die and stamping the at least one blade in the first die with a second die that cooperates with the first die and substantially simultaneously sets the first and second cutting edges with a single stroke to create the first and second tooth set patterns.
27. A method according to claim 26, wherein the milling step comprises indexing a first tooth of the plurality of teeth of the first cutting edge relative to a designated reference point along the at least one blade body, and equally indexing a first tooth of the plurality of teeth of the second cutting edge relative to the same reference point along the at least one blade body, and the setting step further comprises equally indexing the first and second tooth set patterns relative to the same reference point thereby timing the first and second tooth set patterns to the first and second cutting edges, respectively.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A muffler system for a compressor having a compressor shell and a compressing device with a gas discharge port, the muffler system comprising:
a resonator type muffler disposed within the compressor shell and in fluid communication with and connected to the gas discharge port upon installation;
an expansion muffler disposed exterior to the compressor shell at a predetermined distance from the gas discharge port upon installation; and
an exhaust system connecting the resonator type muffler and the expansion muffler, the predetermined distance of the expansion muffler being independent of the spacing along the exhaust system between the resonator type muffler and the expansion muffler.
2. The muffler system of claim 1 wherein the predetermined distance between the expansion muffler and the gas discharge port substantially corresponds to an upper attenuation level of noise reduction achievable by the expansion muffler.
3. The muffler system of claim 2 wherein the predetermined distance substantially corresponds to the second occurrence of the upper attenuation level.
4. The muffler system of claim 2 wherein the predetermined distance substantially corresponds to the first occurrence of the upper attenuation level exterior to the compressor shell.
5. The muffler system of claim 1 wherein the expansion muffler has an elongated chamber.
6. The muffler system of claim 1 wherein a portion of the exhaust system extends substantially vertically along the exterior of the compressor shell.
7. The muffler system of claim 6 wherein the expansion muffler is positioned adjacent to an upper portion of the compressor shell.
8. The muffler system of claim 1 wherein the resonator type muffler filters pressure pulses capable of transmitting noise to the compressor shell at its exhaust port.
9. The muffler system of claim 2 wherein the predetermined distance includes a predetermined range of distances substantially achieving the upper attenuation level of noise reduction.
10. The muffler system of claim 2 wherein the predetermined distance is about 48 inches.
11. The muffler system of claim 9 wherein the predetermined range is about 45-51 inches.
12. The muffler system of claim 9 wherein the predetermined range is about 77-82 inches.
13. A compressor system comprising:
a housing having an exhaust port;
a compression means for compressing a refrigerant fluid, the compression means being disposed within the housing, the compression means having a discharge port for exhausting compressed refrigerant fluid from the compression means;
a resonator type muffler disposed within the housing and in fluid communication with and connected to the discharge port, the resonator type muffler being in fluid communication with the exhaust port;
an expansion muffler disposed exterior to the housing a predetermined distance from the exhaust port and in fluid communication with the exhaust port, the predetermined distance of the expansion muffler being independent of the spacing along an exhaust system between the resonator type muffler and the expansion muffler.
14. The muffler system of claim 13 wherein the predetermined distance between the expansion muffler and the exhaust port substantially corresponds to an upper attenuation level of noise reduction achievable by the expansion muffler.
15. The muffler system of claim 14 wherein the predetermined distance substantially corresponds to the second occurrence of the upper attenuation level.
16. The muffler system of claim 14 wherein the predetermined distance substantially corresponds to the first occurrence of the upper attenuation level exterior to the housing.
17. The muffler system of claim 13 wherein the expansion muffler is positioned adjacent an upper portion of the housing.
18. The muffler system of claim 14 wherein the predetermined distance includes a predetermined range of distances substantially achieving the upper attenuation level of noise reduction.
19. The muffler system of claim 18 wherein the predetermined range is about 15-20 inches.
20. The muffler system of claim 18 wherein the predetermined range is about 45-50 inches.