Variable differential adjustor
First Claim
1. A variable differential adjustor for a fluid pressure-actuated switch, comprisinga. a restrictor housing having a passage therethrough,b. a pressure source having a portion passing through said passage and connected to said pressure-actuated switch for directing fluid to and from said pressure-actuated switch, andc. a restrictor for engaging said pressure source portion, said restrictor being adjustable to variably alter fluid flow through said pressure source portion.
1 Assignment
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Accused Products
Abstract
A variable differential adjustor for a fluid pressure-actuated switch, with the fluid, in the preferred form of the invention, being air. The restrictor has a restrictor housing having a passage through which a pressure source has a portion which passes on its way to a pressure-actuated switch. A restrictor is provided for engaging the portion of the pressure source passing through the restrictor housing and is adjustable to variably alter fluid flow through the pressure source portion. The restrictor comprises a screw-like plug in the pressure source portion which is acted upon by a tube throttle to variably alter the passageway past the plug.
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Citations
19 Claims
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1. A variable differential adjustor for a fluid pressure-actuated switch, comprising
a. a restrictor housing having a passage therethrough, b. a pressure source having a portion passing through said passage and connected to said pressure-actuated switch for directing fluid to and from said pressure-actuated switch, and c. a restrictor for engaging said pressure source portion, said restrictor being adjustable to variably alter fluid flow through said pressure source portion.
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8. A variable differential adjustor for a fluid pressure-actuated switch, comprising
a. a restrictor housing having a passage therethrough, b. a flexible tube having an internal bore and passing through said passage, said tube being connected to said pressure-actuated switch for directing fluid to and from said pressure-actuated switch, and c. a restrictor having a plug engaged in said bore and located in said passage, said plug having at least one external fluid path.
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14. A variable differential adjustor for a fluid pressure-actuated switch, comprising
a. a restrictor housing having a passage therethrough, b. a flexible tube having an internal bore and passing through said passage, said tube being connected to said pressure-actuated switch for directing fluid to and from said pressure-actuated switch, and c. a restrictor comprising i. a plug engaged in said bore and located in said passage, said plug having at least one external fluid path, and ii. a tube throttle, external said tube said tube and proximate said plug, said tube throttle having means for squeezing said tube against said plug.
Specification