US4645034A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Descent system
Assignee: Individual
•
Filing: 1985-06-26
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Granted: 1987-02-24
•
Expires: 2005-06-26
Abstract
Abstract A descent apparatus to control the descent of people or materials from physical heights, for example, buildings, aircraft, ships, trees or mountains and may be used for business, pleasure, and military purposes, under routine or emergency circumstances. The apparatus employs a movable lever arm spring bias toward the braking disposition which influences the amount of friction between various sections of the cable used for lowering as the various sections of the cable interactively contact one another in opposed directions about multiple rollers.
Inventors
- 👤 Selman D. Griffith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:11
CPC Classifications
A; A62; A62B; A62B35/00; A62B35/04; A62B1/00; A62B1/06; A62B1/08; A62B1/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
316 words
A descent apparatus for lowering people or material from physical heights, comprising: (a) a body; (b) a plurality of rollers rotatably attached within said body; (c) a flexible linear member contained within said body which pases over said rollers with various sections of said flexible linear member interactively contacting one another in opposed directions when passing about at least one of said rollers as said flexible linear member exits said body; (d) a braking means attached to said body for influencing the degree of interactive contact between the various sections of said flexible linear member; (e) a storage means contained within said body to receive said flexible linear member for storing said flexible linear member within said body; (f) a friction means mounted within said body which comes in contact with said storage means for controlling the rate at which said flexible linear member exists said body; (g) a retrieval means for returning said flexible linear member storage means contained within said body, (h) a lever rotatably attached to said body; (i) a roller rotatably attached to said lever which engages said flexible linear member as said flexible linear member exists said body, influencing the degree of interactive contact between the various sections of said flexible linear member within said body as said flexible linear member passes over said rollers within said body, the various sections of said flexible linear member interactively contacting one another in opposed directions, said roller being attached to said lever external of said body and engaging said flexible linear member external to said body; (j) a biasing member attached at one end to said lever and at the other end to said body biasing said lever toward the maximum degree of interactive contact between the various sections of the flexible linear member as said flexible linear member passes over said rollers within said body as said linear member exits said body.
Claim 2
Dependent Claim
316 words
A descent apparatus for lowering people or material from physical heights, comprising: (a) a body; (b) a plurality of rollers rotatably attached within said body; (c) a flexible linear member contained within said body which pases over said rollers with various sections of said flexible linear member interactively contacting one another in opposed directions when passing about at least one of said rollers as said flexible linear member exits said body; (d) a braking means attached to said body for influencing the degree of interactive contact between the various sections of said flexible linear member; (e) a storage means contained within said body to receive said flexible linear member for storing said flexible linear member within said body; (f) a friction means mounted within said body which comes in contact with said storage means for controlling the rate at which said flexible linear member exists said body; (g) a retrieval means for returning said flexible linear member storage means contained within said body, (h) a lever rotatably attached to said body; (i) a roller rotatably attached to said lever which engages said flexible linear member as said flexible linear member exists said body, influencing the degree of interactive contact between the various sections of said flexible linear member within said body as said flexible linear member passes over said rollers within said body, the various sections of said flexible linear member interactively contacting one another in opposed directions, said roller being attached to said lever external of said body and engaging said flexible linear member external to said body; (j) a biasing member attached at one end to said lever and at the other end to said body biasing said lever toward the maximum degree of interactive contact between the various sections of the flexible linear member as said flexible linear member passes over said rollers within said body as said linear member exits said body.
Claim 3
Dependent Claim
156 words
The descent apparatus of claim 1, wherein said storage means is comprised of: (a) a shaft rotatably mounted in said body; (b) a spool axially mounted on said shaft; (c) a bail flexibly mounted above said spool and extending into the receiving area of said spool to control the lay of said flexible linear member upon said spool; (d) a handle removably mounted to said shaft to rotate said shaft and said spool mounted on said shaft to retrieve said flexible linear member; and (e) a securing means attached to an end of said flexible linear member for securing the end of said flexible linear member to said spool to eliminate the relative movement of said end of said flexible member with regard to said spool, thereby causing the spool to rotate as said flexible linear member exits said body and permitting the retrieval of said flexible linear member by rotating said spool with said handle.
Claim 4
Dependent Claim
95 words
The descent apparatus of claim 1, wherein said friction means is comprised of: (a) a plurality of friction discs nonrotatably mounted to said body and positioned circumfrentially about said shaft on either side of said spool; (b) a spring washer axially fitted about said shaft and in contact with the plurality of friction discs at one side of said spool; and (c) an adjustment means axially fitted about said shaft and in contact with said washers for compressing said washer against said friction disc to influence the degree of resistance to rotation of said spool.
Claim 5
Dependent Claim
95 words
The descent apparatus of claim 1, wherein said retrieval means is comprised of: (a) a handle removably mounted to said storage means to rotate said storage means to retrieve said flexible linear member; and (b) a securing means attached to an end of said flexible linear member for securing the end of said flexible linear member to said storage means to eliminate the relative movement of said end of said flexible member with regard to said storage means, thereby permitting the retrieval of said flexible linear member by rotating said storage means with said handle.
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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) | 1990-02-23 | 1990-08-25 | 1991-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-23 | 1994-08-25 | 1995-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-23 | 1998-08-25 | 1999-02-24 | $7700.00 | Window Closed / Lapsed |