Patent US3693755A successfully refreshed from Google Patents.
US3693755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for preventing falling down of lifter of fire fighting ladder-equipped vehicle
Assignee: Morita Holdings Corp
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Filing: 1970-08-03
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Granted: 1972-09-26
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Expires: 1990-08-03
Abstract
Abstract A falling down-preventive cable is provided in addition to a lifting cable, with the intermediate portion of said falling down-preventive cable being wrapped a plurality of turns around a drum or pulley provided in a lifter, and brake means for said drum or pulley is held inactive during normal operation by the weight of the lifter, thereby permitting the up and down movements of the lifter. Upon breakage of the lifting cable, the brake means is actuated to control the rotation of the drum or pulley and henceforth said falling down-preventive cable prevents the lifter from falling down. Other advantages and details of the construction will be made clear.
Inventors
- 👤 Fusaji Terayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:51
CPC Classifications
E; E06; E06C; E06C5/00; E06C5/32; E06C5/36
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
139 words
The combination, in a fire fighting vehicle, of a. an aerial ladder, b. a lifter located in juxtaposed relation to said ladder and raisable and lowerable In said relation, c. means for raising and lowering said lifter comprising a sheave carried by said ladder above said lifter and a hoisting cable connected to said lifter and passing over said sheave, d. capstan means mounted on said lifter, e. a second cable extending along the path of lifting and lowering of said lifter, and wrapped about said capstan means, f. braking means connected to said capstan means for controlling rotation thereof to control movement of said lifter along said second cable, and g. brake control means connected to said braking means for operating the same to permit free turning of said capstan means during normal operation of said hoisting cable.
Claim 2
Dependent Claim
139 words
The combination, in a fire fighting vehicle, of a. an aerial ladder, b. a lifter located in juxtaposed relation to said ladder and raisable and lowerable In said relation, c. means for raising and lowering said lifter comprising a sheave carried by said ladder above said lifter and a hoisting cable connected to said lifter and passing over said sheave, d. capstan means mounted on said lifter, e. a second cable extending along the path of lifting and lowering of said lifter, and wrapped about said capstan means, f. braking means connected to said capstan means for controlling rotation thereof to control movement of said lifter along said second cable, and g. brake control means connected to said braking means for operating the same to permit free turning of said capstan means during normal operation of said hoisting cable.
Claim 3
Dependent Claim
138 words
A combination as claimed in claim 1, wherein: h. said aerial ladder is of the plural section extensible and contractible type, i. each of said plural ladder sections except the lowest has upper and lower take-up sheaves near its top and bottom respectively, j. the portion of said second cable extending downwardly from said lifter is fastened to the lower portion of the lowest of said ladder sections, and k. the portion of said second cable extending upwardly from said lifter is entrained in bights passing under tension seriatim about the upper and lower take-up sheaves of each of said ladder sections except said lowest ladder section and then made fast near the top of said lowest ladder section, whereby there is no substantial change in tension of said second cable on extension and contraction of said ladder.
Claim 4
Dependent Claim
22 words
A combination as claimed in claim 1, in which said second cable has a plurality of half-turns engaged with said capstan means.
Claim 5
Dependent Claim
31 words
A combination as claimed in claim 3, in which said capstan means comprises a plurality of pulleys in two rows with each of which said second cable has a half-turn engagement.
Claim 6
Dependent Claim
51 words
A combination as claimed in claim 1, wherein: h. said braking means comprising power storage means for actuating the same to restrain rotation of said capstan means, and i. means responsive to a tensioned condition of said hoisting cable for preventing actuation of said braking means by said power storing means.
Claim 7
Dependent Claim
63 words
A combination as claimed in claim 5, wherein said last named means comprises a lever carried by said lifter having a brake applying and a brake releasing position, said hoisting cable being connected to said lever for normally holding the same in its brake releasing position but allowing the same to move to its brake applying position on breakage of said hoisting cable.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |