US3940989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brake power controlling device
Assignee: Individual
•
Filing: 1974-04-15
•
Granted: 1976-03-02
•
Expires: 1994-04-15
Abstract
Abstract A device for controlling the braking power in a brake equipment of a bicycle exerciser is capable of keeping the brake power of this equipment constant or giving it a programmed variation. The device comprises a non-electronic comparing means, which compares the existing power of the equipment (represented by a first r.p.m.), with the desired power of the equipment (represented by a second r.p.m.). If there is a difference between these two r.p.m., the comparing means delivers an output signal in the form of a third r.p.m., which signal is utilized to control a brake setting means for the brake equipment, such that the first and the second r.p.m. are brought into accordance.
Inventors
- 👤 Marten Engerstam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:55
CPC Classifications
G; G01; G01L; G01L3/00; G01L3/16; G01L3/18; A; A61; A61B; A61B5/00; A61B5/22; A61B5/221
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
168 words
Brake equipment for controlling a braking power applied to a power source, said brake equipment having brake power setting means comprising means for selectively maintaining either a constant braking power or a programmed variable braking power for said brake equipment, non-electronic means for comparing two r.p.m., first means for producing a first one of said r.p.m. with a definite and functional relationship with the power from said source actually existing in said brake equipment, and second means for producing the second of said r.p.m. with a definite and functional relationship with the desired power of said brake equipment, said comparing means comprising means for delivering an output signal in the form of a third r.p.m. constituting a distinct measurement of the difference between said first and said second r.p.m., and means responsive to the output signal from said comparing means for controlling said brake power setting means to adjust the braking power of said brake equipment such that the desired and the existing powers are brought into accordance.
Claim 2
Dependent Claim
168 words
Brake equipment for controlling a braking power applied to a power source, said brake equipment having brake power setting means comprising means for selectively maintaining either a constant braking power or a programmed variable braking power for said brake equipment, non-electronic means for comparing two r.p.m., first means for producing a first one of said r.p.m. with a definite and functional relationship with the power from said source actually existing in said brake equipment, and second means for producing the second of said r.p.m. with a definite and functional relationship with the desired power of said brake equipment, said comparing means comprising means for delivering an output signal in the form of a third r.p.m. constituting a distinct measurement of the difference between said first and said second r.p.m., and means responsive to the output signal from said comparing means for controlling said brake power setting means to adjust the braking power of said brake equipment such that the desired and the existing powers are brought into accordance.
Claim 3
Dependent Claim
16 words
The brake equipment as claimed in claim 1, wherein said non-electronic means is a mechanical device.
Claim 4
Dependent Claim
16 words
The brake equipment as claimed in claim 2, wherein said non-electronic means is a mechanical gear.
Claim 5
Dependent Claim
18 words
The brake equipment as claimed in claim 1, wherein said second means comprises an adjustable centrifugal governor means.
Claim 6
Dependent Claim
25 words
The brake equipment as claimed in claim 4, wherein said second means comprises an infinitely variable speed output means operated responsive to the centrifugal governor.
Claim 7
Dependent Claim
32 words
The brake equipment as claimed in claim 5 wherein said second means further comprises means for driving said centrifugal governor responsive to the movement of a rotating element of said power source.
Claim 8
Dependent Claim
64 words
The brake equipment as claimed in claim 6, wherein said first means includes integrator means responsive to an average of the instantaneous driving power from said power source, which is also applied to said centrifugal governor, and said comparing means includes means responsive to said integrator means for adjusting the braking power and therefore the magnitude of a driving moment of the power source.
Claim 9
Dependent Claim
26 words
The brake equipment as claimed in claim 1 wherein said second means includes an automatic adjusting means including a programming cam for controlling said second r.p.m.
Claim 10
Dependent Claim
28 words
The brake equipment as claimed in claim 8, wherein the second means includes means responsive to the position of said cam for increasing or decreasing the second r.p.m.
Claim 11
Dependent Claim
32 words
The brake equipment as claimed in claim 9, wherein the means responsive to said cam position includes a lever having means for taking out a variable rotational speed as said second r.p.m.
Claim 12
Dependent Claim
32 words
The brake equipment as claimed in claim 8, and wherein said second means comprises means for positioning said cam responsive to the output of a power source which delivers a non-variable r.p.m.
Claim 13
Dependent Claim
25 words
The brake equipment as claimed in claim 1 wherein said second means comprises a cam operated at a rotational speed controlled by a centrifugal governor.
Claim 14
Dependent Claim
30 words
The brake equipment as claimed in claim 1 and means to disengage the second means, and means for manually adjusting the braking power of said brake equipment after said disengagement.
Claim 15
Dependent Claim
39 words
The brake equipment as claimed in claim 13 and means whereby all manual adjustment of the brake equipment and all manual adjustment of the braking power of said brake equipment are made by means of a single adjusting member.
Claim 16
Dependent Claim
54 words
The brake equipment as claimed in claim 1 and means for preventing an unfavourably large braking power when starting the power source or bringing it to a standstill, said last named means comprising a device which causes the second r.p.m. to be maintained within a preselected value range corresponding to a low desired power.
Claim 17
Dependent Claim
20 words
The brake equipment of claim 1 and means whereby an electrical motor having an adjustable r.p.m. provides said second r.p.m.
Claim 18
Dependent Claim
21 words
The brake equipment of claim 1 and means whereby a spring driven motor having an adjustable r.p.m. provides said second r.p.m.
Claim 19
Dependent Claim
14 words
The brake equipment of claim 1 and manual means for controlling said second r.p.m.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-02 | 1979-09-01 | 1980-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-02 | 1983-09-01 | 1984-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-02 | 1987-09-01 | 1988-03-02 | $7700.00 | Window Closed / Lapsed |