Patent US3757901A successfully refreshed from Google Patents.
US3757901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double gate tortuous grip rope brake
Assignee: Individual
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Filing: 1972-08-11
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Granted: 1973-09-11
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Expires: 1992-08-11
Abstract
Abstract A rope brake for use with an elongated flexible member such as a rope consisting briefly of a frame having a closed opening for non-releasable attachment of carabiners and other safety rings and two separate gated openings for receipt of a line. A brake bar slides upon the frame engaging the line in various degrees of frictional contact and a cam surface on the frame terminating in a shoulder permits holding the brake bar in or out of braking position.
Inventors
- 👤 E Hobbs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:22
CPC Classifications
A; A62; A62B; A62B1/00; A62B1/06; A62B1/14
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
280 words
A double gate tortuous grip rope brake comprising; a. a base member having an opening therein adapted for receiving a ring or flexible line; b. a first elongated side member connected to said base and extending therefrom at substantially a right angle and adapted for receiving an elongated flexible line wound thereon; c. a second elongated side member connected to said base and spaced from said first side member extending in substantially the same plane as said base and first side member; d. a cross member spaced from said base and joining said first and second sides and forming a first enclosable opening having an area several times greater than the area of a line adapted to be received therethrough; e. an elongated top member joining said first and second side members and extending at substantially right angles therefrom spaced away from said cross member and in substantially the same plane therewith and forming a second enclosable opening substantially equal to said first opening; f. said second elongated side member being formed with an upper gate opening between said top member and said cross member communicating with said second enclosable opening adapted for receiving a line therethrough; g. said second elongated side member being formed with a lower gate opening between said base and said cross member communicating with said first enclosable opening adapted for receiving a line therethrough; h. gate means having a first position providing a clear opening at said upper and lower gate opening, a second position closing said upper gate opening, and a third position closing said upper anD lower gate openings; and i. resilient means releasably locking said gate in said second and third positions.
Claim 2
Dependent Claim
280 words
A double gate tortuous grip rope brake comprising; a. a base member having an opening therein adapted for receiving a ring or flexible line; b. a first elongated side member connected to said base and extending therefrom at substantially a right angle and adapted for receiving an elongated flexible line wound thereon; c. a second elongated side member connected to said base and spaced from said first side member extending in substantially the same plane as said base and first side member; d. a cross member spaced from said base and joining said first and second sides and forming a first enclosable opening having an area several times greater than the area of a line adapted to be received therethrough; e. an elongated top member joining said first and second side members and extending at substantially right angles therefrom spaced away from said cross member and in substantially the same plane therewith and forming a second enclosable opening substantially equal to said first opening; f. said second elongated side member being formed with an upper gate opening between said top member and said cross member communicating with said second enclosable opening adapted for receiving a line therethrough; g. said second elongated side member being formed with a lower gate opening between said base and said cross member communicating with said first enclosable opening adapted for receiving a line therethrough; h. gate means having a first position providing a clear opening at said upper and lower gate opening, a second position closing said upper gate opening, and a third position closing said upper anD lower gate openings; and i. resilient means releasably locking said gate in said second and third positions.
Claim 3
Dependent Claim
57 words
A rope brake device as described in claim 1 comprising: a. said side members are spaced a distance apart equal to approximately two diameters of the line it is adapted to be used with; and b. said upper and lower portions of said openings are smoothly rounded to guide said line toward the center of said device.
Claim 4
Dependent Claim
133 words
A rope brake apparatus as described in claim 1 comprising: a. said gate means including an elongated tube; b. an elongated rod positioned within said tube and moveable between said first, second and third positions. c. resilient spring means biasing said rod to said first ''''lock'''' position; d. lock means operatively connected to said rod and protruding from said tube in said first position of said rod and moveable to a non-protruding position in said second ''''unlocked'''' position of said rod; e. said top member having an opening therethrough to permit said tube to slide therethrough and said second side member having an opening axially therethrough to permit entry of said tube and movement through a portion thereof; and f. stop means engaging said lock means in said first, second and third positions.
Claim 5
Dependent Claim
85 words
A rope brake as described in claim 1 comprising: a. a brake bar including a rigid band dimensioned to closely encircle said side members and to freely slide longitudinally thereover and further dimensioned to be in close fitting relationship with said top member and said cross member and adapted to receive a line between said band and said top member and said cross member in binding relationship so as to prevent further sliding on said sides and to lock said line in fixed relationship therewith.
Claim 6
Dependent Claim
33 words
A rope brake as described in claim 4 comprising: a. said brake bar being formed in the shape of a ''''C'''' with the ends of the band occurring generally between said side members.
Claim 7
Dependent Claim
93 words
A rope brake as described in claim 4 comprising: a. said first side member being formed with a cam surface projecting away from said side permitting said brake bar to ride smoothly toward said base member, and said cam surface terminating in an angular projecting shoulder restricting movement of said brake bar away from said base; and b. said projecting shoulder being located from said cross member at least the distance equaling the sum of the thickness of said brake bar band and the diameter of a line adapted to be inserted therebetween.
Claim 8
Dependent Claim
27 words
A rope brake as described in claim 4 comprising: a. said brake bar being formed with upper and lower end projections dimensioned to span said gate openings.
References Cited (Backward Citations)
SU239832A1
Cited
US3217840A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |