US3698243A — Apparatus for controlling the characteristics of …

Claim 1

Independent Claim 175 words

Load control means for controlling the retarding force characteristics of a rotary power absorber for absorbing driving torque from a shaft while said shaft is being driven from a prime mover, said power absorber including means for producing retarding force, and fluid pressure responsive means for causing said retarding means to produce a retarding force to oppose said driving torque, comprising: speed responsive pressure regulating means including a governor to be driven from the prime mover for providing a fluid pressure corresponding in value to, and varying as, the speed of rotation of the prime mover and including an air pressure control valve connected with a source of supply of air under pressure, said air valve being actuated by said speed responsive means, and means including an air-pressure-tohydraulic-pressure transducer interposed between the air pressure control valve and the means for producing the retarding force for transmitting the controlled fluid pressure from said air pressure control valve to said fluid pressure responsive means to apply a retarding force of a corresponding value to the power absorber.

Claim 2

Dependent Claim 175 words

Load control means for controlling the retarding force characteristics of a rotary power absorber for absorbing driving torque from a shaft while said shaft is being driven from a prime mover, said power absorber including means for producing retarding force, and fluid pressure responsive means for causing said retarding means to produce a retarding force to oppose said driving torque, comprising: speed responsive pressure regulating means including a governor to be driven from the prime mover for providing a fluid pressure corresponding in value to, and varying as, the speed of rotation of the prime mover and including an air pressure control valve connected with a source of supply of air under pressure, said air valve being actuated by said speed responsive means, and means including an air-pressure-tohydraulic-pressure transducer interposed between the air pressure control valve and the means for producing the retarding force for transmitting the controlled fluid pressure from said air pressure control valve to said fluid pressure responsive means to apply a retarding force of a corresponding value to the power absorber.

Claim 3

Dependent Claim 159 words

Load control means for controlling the retarding force characteristics of a rotary power absorber for absorbing driving torque from a shaft while said shaft is being driven from a prime mover, said power absorber including means for producing retarding force, and fluid pressure responsive means for causing said retarding means to produce a retarding force to oppose said driving torque, comprising: speed responsive pressure regulating means including a governor to be driven from the prime mover for providing a fluid pressure corresponding in value to, and varying as, the speed of rotation of the prime mover and including an air pressure control valve connected with a source of supply of air under pressure, an adjustable linkage disposed between said governor and said valve, actuated by said speed responsive means, and means for transmitting the controlled fluid pressure from said valve to said fluid pressure responsive means to apply a retarding force of a corresponding value to the power absorber.

Claim 4

Dependent Claim 159 words

Load control means for controlling the retarding force characteristics of a rotary power absorber for absorbing driving torque from a shaft while said shaft is being driven from a prime mover, said power absorber including means for producing retarding force, and fluid pressure responsive means for causing said retarding means to produce a retarding force to oppose said driving torque, comprising: speed responsive pressure regulating means including a governor to be driven from the prime mover for providing a fluid pressure corresponding in value to, and varying as, the speed of rotation of the prime mover and including an air pressure control valve connected with a source of supply of air under pressure, an adjustable linkage disposed between said governor and said valve, actuated by said speed responsive means, and means for transmitting the controlled fluid pressure from said valve to said fluid pressure responsive means to apply a retarding force of a corresponding value to the power absorber.

Claim 5

Dependent Claim 85 words

Load control means as defined in claim 2, wherein the adjustable linkage comprises a pair of generally parallel bars with a fulcrum member therebetween, one bar being pivotally mounted at one end and the other pivotally mounted at the end thereof remote from said one end, and wherein the governor includes a movable element acting on the free end of one of said bars, and the fluid pressure control valve includes a member acted upon by the free end of the other of said bars.

Claim 6

Dependent Claim 35 words

Load control means as defined in claim 3, wherein the fulcrum member between the bars is a roller, and means is connected with said roller for adjusting its position along the length of said bars.

Claim 7

Dependent Claim 186 words

Load control means for controlling the retarding force characteristics of a rotary power absorber for absorbing driving torque from a shaft while said shaft is being driven from a prime mover, said power absorber including means for producing retarding force, and hydraulic fluid pressure responsive means for causing said retarding means to produce a retarding force to oppose said driving torque, comprising: speed responsive pressure regulating means to be driven from the prime mover for providing a fluid pressure corresponding in value to, and varying as, the speed of rotation of the prime mover and including fluid pressure control means actuated by said speed responsive means, said fluid pressure control means incLuding a flow control valve having an inlet and an outlet, a source of air supply under pressure connected to the flow control valve inlet, and means for transmitting the controlled air pressure from the outlet of said flow control valve to said hydraulic fluid pressure responsive means to apply a retarding force of a corresponding value to the power absorber and including an air-pressure-to-hydraulic-pressure transducer for transforming the controlled air pressure to hydraulic pressure.

Claim 8

Dependent Claim 186 words

Load control means for controlling the retarding force characteristics of a rotary power absorber for absorbing driving torque from a shaft while said shaft is being driven from a prime mover, said power absorber including means for producing retarding force, and hydraulic fluid pressure responsive means for causing said retarding means to produce a retarding force to oppose said driving torque, comprising: speed responsive pressure regulating means to be driven from the prime mover for providing a fluid pressure corresponding in value to, and varying as, the speed of rotation of the prime mover and including fluid pressure control means actuated by said speed responsive means, said fluid pressure control means incLuding a flow control valve having an inlet and an outlet, a source of air supply under pressure connected to the flow control valve inlet, and means for transmitting the controlled air pressure from the outlet of said flow control valve to said hydraulic fluid pressure responsive means to apply a retarding force of a corresponding value to the power absorber and including an air-pressure-to-hydraulic-pressure transducer for transforming the controlled air pressure to hydraulic pressure.

Claim 9

Dependent Claim 77 words

Load control means as defined in claim 5, wherein the speed responsive pressure regulating means includes a governor device operable in response to variations in the speed of the prime mover; a linkage actuated by force supplied by said governor; and an adjustable fulcrum element for increasing or decreasing the force developed by said governor, the flow control valve being arranged to be actuated by said linkage in proportion to the force exerted thereon by said governor.

Claim 10

Dependent Claim 220 words

Load control means for controlling the retarding force characteristics of a friction type rotary power absorber for absorbing driving torque from a shaft while said shaft is being driven from a prime mover, said power absorber including friction brake means for producing retarding force, and fluid pressure responsive means for causing said friction brake means to produce a retarding force to oppose said driving torque, comprising: speed responsive pressure regulating means to be driven from the prime mover for providing a fluid pressure corresponding in value to, and varying as the speed of rotation of, the prime mover and including a source of air pressure; a conduit connected with said source of air pressure; an air pressure control valve connected with said conduit for controlling the air pressure from said air source, said air pressure control valve being operated in response to the speed of rotation of the prime mover to control the fluid pressure to said fluid pressure responsive means to actuate said friction brake means, the value of said controlled air pressure being a pre-selected function of the speed of rotation of the prime mover; and means for transmitting the controlled fluid pressure from said air pressure control valve to said fluid pressure responsive means to apply a retarding force of a corresponding value to the power absorber.

Claim 11

Dependent Claim 220 words

Load control means for controlling the retarding force characteristics of a friction type rotary power absorber for absorbing driving torque from a shaft while said shaft is being driven from a prime mover, said power absorber including friction brake means for producing retarding force, and fluid pressure responsive means for causing said friction brake means to produce a retarding force to oppose said driving torque, comprising: speed responsive pressure regulating means to be driven from the prime mover for providing a fluid pressure corresponding in value to, and varying as the speed of rotation of, the prime mover and including a source of air pressure; a conduit connected with said source of air pressure; an air pressure control valve connected with said conduit for controlling the air pressure from said air source, said air pressure control valve being operated in response to the speed of rotation of the prime mover to control the fluid pressure to said fluid pressure responsive means to actuate said friction brake means, the value of said controlled air pressure being a pre-selected function of the speed of rotation of the prime mover; and means for transmitting the controlled fluid pressure from said air pressure control valve to said fluid pressure responsive means to apply a retarding force of a corresponding value to the power absorber.

Claim 12

Dependent Claim 217 words

A friction type power absorber for use in analyzing the performance of a prime mover, comprising: a driven brake shaft for receiving the driving torque from a prime mover; power absorption means including rotor means connected to receive driving torque from said shaft, stator means operatively disposed relative to said rotor means; friction brake means carried by one of either said rotor or stator means and movable into and out of frictional engagement with the other; and fluid pressure operated actuator means operable to apply force for moving said friction brake means into said frictional engagement to thereby apply retarding force to said rotor in opposition to driving torque applied thereto by said shaft, the value of said retarding force varying with the force exerted by said actuator means; and control means including means to generate a pressure signal to actuate an element of a fluid system for controlling said actuator means by fluid pressure regulated in accordance with the speed of rotation of said shaft so that the force exerted on said friction brake means by said actuator means varies as a function of said rotational speed and so that said retarding force is substantially zero at zero speed of said shaft and increases and decreases in value at a rate faster than said driving torque.

Claim 13

Dependent Claim 217 words

A friction type power absorber for use in analyzing the performance of a prime mover, comprising: a driven brake shaft for receiving the driving torque from a prime mover; power absorption means including rotor means connected to receive driving torque from said shaft, stator means operatively disposed relative to said rotor means; friction brake means carried by one of either said rotor or stator means and movable into and out of frictional engagement with the other; and fluid pressure operated actuator means operable to apply force for moving said friction brake means into said frictional engagement to thereby apply retarding force to said rotor in opposition to driving torque applied thereto by said shaft, the value of said retarding force varying with the force exerted by said actuator means; and control means including means to generate a pressure signal to actuate an element of a fluid system for controlling said actuator means by fluid pressure regulated in accordance with the speed of rotation of said shaft so that the force exerted on said friction brake means by said actuator means varies as a function of said rotational speed and so that said retarding force is substantially zero at zero speed of said shaft and increases and decreases in value at a rate faster than said driving torque.

Claim 14

Dependent Claim 34 words

A friction type power absorber as defined in claim 8, wherein the value of the retarding force is varied in accordance with a mathematical function of the speed of rotation of the prime mover.

Claim 15

Dependent Claim 34 words

A friction type power absorber as defined in claim 8, wherein the value of the retarding force is varied in accordance with substantially the square of the spEed of rotation of the prime mover.

Claim 16

Dependent Claim 19 words

A friction type power absorber as defined in claim 8, wherein the control means includes a speed responsive governor.

Claim 17

Dependent Claim 31 words

A friction type power absorber as defined in claim 11, wherein the governor is driven at a speed proportional to the speed of the brake shaft driven from the prime mover.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1975-10-17	1976-04-17	1976-10-17	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1979-10-17	1980-04-17	1980-10-17	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1983-10-17	1984-04-17	1984-10-17	$7700.00	Window Closed / Lapsed

Apparatus for controlling the characteristics of fluid pressure operated friction type power absorption devices

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