US3826155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lightweight lever for high mechanical stressing
Assignee: Sulzer AG
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Filing: 1973-05-09
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Granted: 1974-07-30
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Expires: 1993-05-09
Abstract
Abstract The lever is constructed of a hub and a lever arm of composite structure which is secured to the hub. The lever arm is made of one or more strips of resin-impregnated carbon fibers cut from a board of like material. The boards are commercially prepolymerized to a predetermined extent. In addition, a loop of carbon fibers can also be used with the strips to form the lever arm. The arm is secured to the hub by a pressing and curing operation or is secured in place by an overlying cover.
Inventors
- 👤 J Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:39
CPC Classifications
D; D03; D03D; D03D49/00; D03D49/24; D03D49/26; D03D49/38; F; F16; F16B; F16B2200/00; F16B2200/40; F16B2200/406; Y; Y10; Y10S; Y10S428/00; Y10S428/902; Y10T; Y10T428/00; Y10T428/30; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20582; Y10T74/21; Y10T74/2142
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
79 words
A lever of reduced mass for high mechanical stressing having a hub including a pair of side walls defining a recess, and a lever arm received in said recess in bearing engagement with said side walls and extending from said hub, said lever arm including a loop of composite material defining an internal space, at least one preimpregnated strip of material in said space and at least one preimpregnated strip of material covering one side face of said loop.
Claim 2
Dependent Claim
79 words
A lever of reduced mass for high mechanical stressing having a hub including a pair of side walls defining a recess, and a lever arm received in said recess in bearing engagement with said side walls and extending from said hub, said lever arm including a loop of composite material defining an internal space, at least one preimpregnated strip of material in said space and at least one preimpregnated strip of material covering one side face of said loop.
Claim 3
Dependent Claim
20 words
A lever as set forth in claim 1 wherein said loop and said strips are integrally bonded to each other.
Claim 4
Dependent Claim
26 words
A lever as set forth in claim 1 wherein said hub includes an integral tongue between said side walls projecting into said space within said loop.
Claim 5
Dependent Claim
43 words
A lever as set forth in claim 1 further having a ring within said loop at one end of said lever arm and at least one apertured disc on one side of said loop aligned with said ring to define a pivot aperture.
Claim 6
Dependent Claim
45 words
A lever as set forth in claim 4 wherein each strip within said loop has an end contoured to abut said ring in mating relation and wherein said strip on said side face of said loop is contoured to abut said disc in mating relation.
Claim 7
Dependent Claim
17 words
A lever as set forth in claim 4 wherein said disc is formed of wound reinforcing fibers.
Claim 8
Dependent Claim
14 words
A lever as set forth in claim 6 wherein said fibers are carbon fibers.
Claim 9
Dependent Claim
26 words
A lever as set forth in claim 1 wherein said strips on said side face has an aperture at one end to define a pivot aperture.
Claim 10
Dependent Claim
31 words
A lever as set forth in claim 1 which includes a plurality of said strips, each strip having a graining oriented in angular relation to the graining of an adjacent strip.
Claim 11
Dependent Claim
48 words
A lever as set forth in claim 1 which includes a plurality of said strips on said side face of said loop, said plurality including strips of different lengths along said lever arm with the shorter strips being disposed between the longer of said strips and said loop.
Claim 12
Dependent Claim
21 words
A lever as set forth in claim 1 which further includes an adhesive means bonding said lever arm to said hub.
Claim 13
Dependent Claim
16 words
A lever as set forth in claim 11 wherein said adhesive means is an adhesive foil.
Claim 14
Dependent Claim
17 words
A lever as set forth in claim 1 wherein said loop is formed of wound reinforcing fibers.
Claim 15
Dependent Claim
14 words
A lever as set forth in claim 13 wherein said fibers are carbon fibers.
Claim 16
Dependent Claim
32 words
A lever as set forth in claim 1 which further has a cover secured to said hub over said lever arm to secure said lever arm in said recess of said hub.
Claim 17
Dependent Claim
106 words
A lever as set forth in claim 1 wherein said hub has a clamping portion for securing a bar therein, said clamping portion being disposed in perpendicular relation to said lever arm, and wherein said lever arm includes a plurality of said strips within said loop each havinG a graining oriented in angular relation to the graining of an adjacent strip, and a plurality of said strips on opposite side faces of said loop each having a graining oriented in angular relation to the graining of an adjacent strip, at least some of said latter strips being of different lengths to define a tapered lever arm.
Claim 18
Dependent Claim
69 words
A lever of reduced mass for high mechanical stressing having a hub including a pair of side walls defining a recess, a lever arm received in said recess in bearing engagement with said side walls and extending from said hub, said lever arm including at least one preimpregnated strip of material, and a cover secured to said hub to secure said lever arm in said recess of said hub.
Claim 19
Dependent Claim
69 words
A lever of reduced mass for high mechanical stressing having a hub including a pair of side walls defining a recess, a lever arm received in said recess in bearing engagement with said side walls and extending from said hub, said lever arm including at least one preimpregnated strip of material, and a cover secured to said hub to secure said lever arm in said recess of said hub.
Claim 20
Dependent Claim
46 words
A lever of reduced mass for high mechanical stressing having a hub including a recess, and a lever arm secured in said recess, said lever arm including at least one strip of resin-impregnated carbon fibers and having an aperture at an end remote from said hub.
Claim 21
Dependent Claim
46 words
A lever of reduced mass for high mechanical stressing having a hub including a recess, and a lever arm secured in said recess, said lever arm including at least one strip of resin-impregnated carbon fibers and having an aperture at an end remote from said hub.
Claim 22
Dependent Claim
17 words
A lever as set forth in claim 18 wherein said lever is integrally bonded to said hub.
Claim 23
Dependent Claim
34 words
A lever as set forth in claim 19 which further has an adhesive means between said hub and said lever arm strip for reducing stresses during curing between said hub and said lever arm.
Claim 24
Dependent Claim
50 words
A lever as set forth in claim 18 wherein said lever arm has a loop at least partially engaged in said recess and wherein said lever further has a cover removably secured to said hub over said recess to removably secure said lever arm in said recess of said hub.
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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) | 1977-07-29 | 1978-01-28 | 1978-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-29 | 1982-01-28 | 1982-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-29 | 1986-01-28 | 1986-07-30 | $7700.00 | Window Closed / Lapsed |