Patent US4458781A successfully refreshed from Google Patents.
US4458781A
Expired / Lapsed
US
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Climbing aid and safety descent device
Assignee: Sellstrom Manufacturing Co
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Filing: 1982-09-30
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Granted: 1984-07-10
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Expires: 2002-09-30
Abstract
Abstract A novel controlled descent device is disclosed which not only aids in the ascent of a human being from a lower elevation to an upper elevation but also provides for the safe descent of a human being from the upper level to the lower level. The apparatus comprises a round cable, a counterweight, a controlled descent pulley having a ratchet and pawl brake system and a conventional pulley; all operating conjunctly dependently on the position and situation of the human being. The controlled descent pulley and conventional pulley are held in a plate structure which is secured to the upper elevation. The counterweight is raised and lowered from the upper elevation to the lower elevation and vice-versa by means of a guy wire which is anchored and held in relatively taught position between said upper elevation and said lower elevation.
Inventors
- 👤 J. Nigel Ellis
- 👤 Meyer Ostrobrod
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:00
CPC Classifications
A; A62; A62B; A62B1/00; A62B1/06; A62B1/08; A62B1/10; E; E06; E06C; E06C7/00; E06C7/18; E06C7/186
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
255 words
A controlled descent device for a human being to safely descend from an upper level of elevation to a lower level of elevation which comprises: (a) a first connection means for connecting a round main cable with a safety belt attached to said human being; (b) a round main cable for interconnection of said first connection means with a counterweight means; (c) a second connection means for connecting said round main cable to said counterweight means; (d) a counterweight means; (e) a round guy cable held relatively taught and attached to said upper and a lower elevation; (f) a first pulley means interconnecting said counterweight means and said round guy cable wherein as the first pulley means transverses said guy cable the counterweight moves in the same direction substantially parallel to said round guy cable means; (g) a second pulley means for transversal of said round main cable; (h) a controlled descent pulley for passage of said round main cable once therearound wherein said second pulley means and said controlled descent pulley device are supported by a structure of said upper elevation and wherein said round main cable will lower said human being at a controlled rate of descent to said lower elevation by a brake means comprising: (i) a brake shoe and a cover wherein the spin of said pulley is decreased by friction of said brake shoe upon said cover; and wherein (ii) said brake shoe is activated by the applied weight of said human being to a ratchet and pawl brake means.
Claim 2
Dependent Claim
255 words
A controlled descent device for a human being to safely descend from an upper level of elevation to a lower level of elevation which comprises: (a) a first connection means for connecting a round main cable with a safety belt attached to said human being; (b) a round main cable for interconnection of said first connection means with a counterweight means; (c) a second connection means for connecting said round main cable to said counterweight means; (d) a counterweight means; (e) a round guy cable held relatively taught and attached to said upper and a lower elevation; (f) a first pulley means interconnecting said counterweight means and said round guy cable wherein as the first pulley means transverses said guy cable the counterweight moves in the same direction substantially parallel to said round guy cable means; (g) a second pulley means for transversal of said round main cable; (h) a controlled descent pulley for passage of said round main cable once therearound wherein said second pulley means and said controlled descent pulley device are supported by a structure of said upper elevation and wherein said round main cable will lower said human being at a controlled rate of descent to said lower elevation by a brake means comprising: (i) a brake shoe and a cover wherein the spin of said pulley is decreased by friction of said brake shoe upon said cover; and wherein (ii) said brake shoe is activated by the applied weight of said human being to a ratchet and pawl brake means.
Claim 3
Dependent Claim
44 words
The device for obtention of controlled descent set forth in claim 1 wherein said first connection means is adapted for interconnection with a static structure intermediate said lower and upper levels or at said upper level in addition to connection with said human beings.
Claim 4
Dependent Claim
61 words
The apparatus according to claim 1, wherein said first connection means comprises a safety belt in attachment with said human being, an eyelet in attachment with said safety belt, an elongated interconnecting third connection means, a snap for interconnecting said third connection means with said eyelet and a swagger for interconnection of said third connection means with said round main cable.
Claim 5
Dependent Claim
29 words
The apparatus according to claim 2, wherein first connection means in interconnection with said static structure is a snap hook, a swagger and a elongated interconnection fourth connection means.
Claim 6
Dependent Claim
16 words
The apparatus according to claim 1, wherein said round cable means comprises a galvanized round cable.
Claim 7
Dependent Claim
22 words
The apparatus according to claim 1, wherein said second connection means comprises at least a hook for securement to said counterweight means.
Claim 8
Dependent Claim
27 words
The apparatus according to claim 1, wherein said counterweight means are masonry items weighing less than, more than or equal to said weight of said human being.
Claim 9
Dependent Claim
32 words
The apparatus according to claim 1, wherein said ratchet and pawl brake means is activated by the centrifugal force of the downward weight of said human being as a fall is occurring.
Claim 10
Dependent Claim
180 words
A controlled descent and aid in ascent apparatus for a human being to safely descend from an upper elevation to a lower elevation and to aid in the upward motion from the lower elevation to the upper elevation which comprises: (a) a round main cable in interconnection with a counterweight and the human being; (b) a guy cable and counterweight pulley means for movement of said counterweight in a direction opposite to that of the movement of the human being; (c) a pulley means for passage of the round main cable intermediate the counterweight and the human being; (d) a controlled descent pulley means having a ratchet and pawl centrifugal force activating brake means for both (i) passage of the round main cable around said control descent pulley means at a controlled rate of descent when said human being is moving in the same direction as the pull of gravity, and; (ii) continuous transversal of the round main cable around said control descent pulley means when said human being is moving in a direction opposite to that of gravitational pull.
Claim 11
Dependent Claim
180 words
A controlled descent and aid in ascent apparatus for a human being to safely descend from an upper elevation to a lower elevation and to aid in the upward motion from the lower elevation to the upper elevation which comprises: (a) a round main cable in interconnection with a counterweight and the human being; (b) a guy cable and counterweight pulley means for movement of said counterweight in a direction opposite to that of the movement of the human being; (c) a pulley means for passage of the round main cable intermediate the counterweight and the human being; (d) a controlled descent pulley means having a ratchet and pawl centrifugal force activating brake means for both (i) passage of the round main cable around said control descent pulley means at a controlled rate of descent when said human being is moving in the same direction as the pull of gravity, and; (ii) continuous transversal of the round main cable around said control descent pulley means when said human being is moving in a direction opposite to that of gravitational pull.
Claim 12
Dependent Claim
34 words
The apparatus of claim 9, wherein said control descent pulley and pulley means are located within a plate structure which is an interconnection with and supported by a first structure at the upper elevation.
Claim 13
Dependent Claim
30 words
The apparatus of claim 8, wherein the guy cable is held at a relatively taught position by interconnection with a point at the upper elevation and a point lower thereto.
Claim 14
Dependent Claim
41 words
The apparatus of claim 10, wherein said round cable is connected to said human being via a safety belt with an eyelet in the front of it for reception of a snap hook held at the end of the round cable.
Claim 15
Dependent Claim
31 words
The apparatus of claim 8, wherein said round main cable is attached to a static structure intermittent with the upper and lower level or at a position at the upper elevation.
Claim 16
Dependent Claim
46 words
The apparatus of claim 8, wherein said control descent pulley comprises a pulley having a ratchet wheel and a brake pawl pin, wherein said brake pawl pin is machined to engage intermittently the ratchet wheel and is attached to said pulley by a brake pawl spring.
Claim 17
Dependent Claim
32 words
The apparatus of claim 14, wherein said brake pawl pin intermittently engages the ratchet wheel as a result of the crown wheel and idler gear both of which have teeth meshing together.
Claim 18
Dependent Claim
48 words
The apparatus of claim 8, wherein said ratchet and pawl brake means comprises a brake shoe intermittently compressed against a cover of the controlled descent pulley to thereby provide intermittent rotation of the same around a center shaft and thereby a controlled descent of the said human being.
Claim 19
Dependent Claim
45 words
The apparatus of claim 8, wherein said human being's ascension from the lower level to the upper level is aided by the pull of said counterweight via the main round cable around the control descent pulley without engagement of the ratchet and pawl brake means.
Claim 20
Independent Claim
150 words
An apparatus for assisting a human being to climb up a vertically oriented ladder and for slowing said human being's fall in the event of emergency descent, said apparatus comprising a counterweight, connection means for connecting a round main cable with said human being, a round cable for connecting said counterweight to said connection means, a pulley situated between said connection means and said counterweight and a centrifugal force activated controlled descent pulley means situated between said pulley and said connection means, said pulley and said centrifugal force activated controlled descent pulley being affixed to a plate supported above said human being, said cable passing upwardly from said counterweight over said pulley and then substantially horizontally from said pulley to said centrifugal force activated controlled descent pulley means, said cable thereafter being passed downwardly from said centrifugal force activated controlled descent pulley in a direction substantially parallel to the ladder.
Claim 21
Independent Claim
150 words
An apparatus for assisting a human being to climb up a vertically oriented ladder and for slowing said human being's fall in the event of emergency descent, said apparatus comprising a counterweight, connection means for connecting a round main cable with said human being, a round cable for connecting said counterweight to said connection means, a pulley situated between said connection means and said counterweight and a centrifugal force activated controlled descent pulley means situated between said pulley and said connection means, said pulley and said centrifugal force activated controlled descent pulley being affixed to a plate supported above said human being, said cable passing upwardly from said counterweight over said pulley and then substantially horizontally from said pulley to said centrifugal force activated controlled descent pulley means, said cable thereafter being passed downwardly from said centrifugal force activated controlled descent pulley in a direction substantially parallel to the ladder.
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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) | 1987-07-10 | 1988-01-09 | 1988-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-10 | 1992-01-09 | 1992-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-10 | 1996-01-09 | 1996-07-10 | $7700.00 | Window Closed / Lapsed |