Boots – shoes – and leggings
Patent
1977-09-14
1979-08-07
Gruber, Felix D.
Boots, shoes, and leggings
60 3929, 415 17, 415 39, F02C 914, F04D 2702
Patent
active
041640349
ABSTRACT:
A surge control system for controlling and preventing a surge condition and a method of controlling surge in a fixed or variable speed compressor or a compressor having a variable geometry which provides air to a pneumatic load. A transducer provides a signal proportional to the outlet pressure of the air from the compressor. The signal is differentiated with respect to time and if a surge condition is ensuing, the absolute value of the differentiated signal is greater than a reference. When the differentiated signal is greater than the reference, a portion of the air supplied to the load is vented to reduce the outlet pressure. A reduction in the outlet pressure alleviates the ensuing surge condition and the absolute value of the differentiated signal decreases, causing the venting valve to close.
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Faulkner Dennis T.
Glennon Timothy F.
Sarphie Theodore E.
Gruber Felix D.
Sundstrand Corporation
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