IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0797879
(2010-06-10)
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등록번호 |
US-8584798
(2013-11-19)
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발명자
/ 주소 |
- Stoffels, Richard B.
- Sidla, James G.
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출원인 / 주소 |
- Garlock Safety Systems Inc.
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
3 인용 특허 :
33 |
초록
▼
A safety apparatus (10) includes a frame unit (12) placed on a surface (102). A cable (62) is mounted around a pulley (60) rotatably mounted to the frame unit (12) about a rotation axis (58). A slide (90) is slideably mounted to the frame unit (12) along a slide axis (92) at a non-parallel angle to
A safety apparatus (10) includes a frame unit (12) placed on a surface (102). A cable (62) is mounted around a pulley (60) rotatably mounted to the frame unit (12) about a rotation axis (58). A slide (90) is slideably mounted to the frame unit (12) along a slide axis (92) at a non-parallel angle to the rotation axis (58) and movable between upper and lower positions. The cable (62) is attached between the slide (90) and a worker (100) on the surface (102). A biasing member (110) is mounted between the slide (90) and the frame unit (12) and biases the slide (90) from the lower position to the upper position. An engaging member (120) is mounted to the slide (90) to move therewith. The engaging member (120) is above the surface (102) when the slide (90) is in the upper position. If the worker (100) falls from the surface, the engaging member (120) is moved downward and grips the surface (102) under the action of force resulting from falling of the worker (100) to retain the safety apparatus (10) on the surface and, thus, arrests the fall of the worker (100) from the surface (102).
대표청구항
▼
1. A safety apparatus for arresting a fall of a worker from a surface, comprising, in combination: a frame unit adapted to be placed on the surface;a pulley rotatably mounted to the frame unit about a rotation axis spaced from the surface;a cable mounted around the pulley and including first and sec
1. A safety apparatus for arresting a fall of a worker from a surface, comprising, in combination: a frame unit adapted to be placed on the surface;a pulley rotatably mounted to the frame unit about a rotation axis spaced from the surface;a cable mounted around the pulley and including first and second ends, with the second end of the cable adapted to be connected to the worker, with the pulley located intermediate the first and second ends of the cable;a slide slideably mounted to the frame unit along a slide axis at a non-parallel angle to the rotation axis and movable between upper and lower positions, with the first end of the cable attached to the slide, with force resulting from the fall of the worker from the surface transmitted to the slide via the cable;a biasing member mounted between the slide and the frame unit, with the biasing member biasing the slide from the lower position to the upper position; andan engaging member mounted to the slide to move therewith, with the engaging member being above the surface when the slide is in the upper position, with the engaging member gripping the surface when the slide is in the lower position, preventing further falling of the worker. 2. The safety apparatus as claimed in claim 1, further comprising, in combination: an attachment member connected to the second end of the cable, with the attachment member having cross sections perpendicular to the cable; anda passage between the attachment member and the pulley, with the cable passing through the passage, with the passage having cross sections perpendicular to the cable and smaller than the cross sections of the attachment member, with the attachment member abutting with the passage limiting movement of the slide under bias of the biasing member. 3. The safety apparatus as claimed in claim 2, further comprising, in combination: a harness having a first end adapted to be connected to the worker and a second end, with the attachment member including a loop to which the second end of the harness is attached. 4. The safety apparatus as claimed in claim 3, with the attachment member including a plate having first and second sides extending at non-parallel angles to the cable, with the loop formed on the first side of the plate, with a ring formed on the second side of the plate, with the second end of the cable attached to the ring, with the pulley intermediate the slide and the plate. 5. The safety apparatus as claimed in claim 1, with the slide axis being at an angle in the order of 74° relative to the surface. 6. The safety apparatus as claimed in claim 1, with the biasing member including a cylinder having a lower end fixed to the frame unit, with the cylinder further including an upper end fixed to the slide. 7. The safety apparatus as claimed in claim 1, with the engaging member including first and second spaced teeth each extending from the slide, with each of the first and second teeth having a first side and a second side intermediate the first side and the slide, with each of the first and second teeth further including inner and outer surfaces extending between the first and second sides, with a first spacing between the first sides of first and second teeth being less than a second spacing between the second sides of the first and second teeth. 8. The safety apparatus as claimed in claim 7, with each of the first and second teeth further including top and bottom edges extending between the inner and outer surfaces and between the first and second sides, with the bottom edge of each of the first and second teeth being wedge-shaped and including a tip and having decreasing widths with increasing spacing from the top edge. 9. The safety apparatus as claimed in claim 8, with the bottom edge of each of the first and second teeth including first and second arcuate portions, with the first arcuate portion extending from the first side to the tip and having a first radius, with the second arcuate portion extending from the tip to the second side and having a second radius, with the first radius of the first arcuate portion having a radius larger than the second radius of the second arcuate portion. 10. The safety apparatus as claimed in claim 9, with the first and second sides of each of the first and second teeth being parallel to each other, with the top edge of each of the first and second teeth being perpendicular to the first and second sides. 11. The safety apparatus as claimed in claim 10, with the engaging member further including a base mounted to the slide and extending along the slide axis, with the base including a serrated bottom, with the second sides of the first and second teeth secured to the base, with the serrated bottom of the base intermediate the second side and the tip of the bottom edge of each of the first and second teeth. 12. The safety apparatus as claimed in claim 11, with the first tooth being planar and at a first acute angle relative to the base, with the second tooth being planar and at a second acute angle relative to the base. 13. The safety apparatus as claimed in claim 12, with each of the first and second arcuate angles being in the order of 66°. 14. The safety apparatus as claimed in claim 1, with the slide including U-shaped cross sections perpendicular to the slide axis, with the slide including first and second arms and a connecting wall extending between the first and second arms, with the pulley extending intermediate the first and second arms. 15. The safety apparatus as claimed in claim 14, with the frame unit including a plurality of rollers intermediate the pulley and an engagement point between the biasing member and the slide, with the plurality of rollers supporting sliding movement of the slide between the upper and lower positions along the slide axis. 16. The safety apparatus as claimed in claim 1, with the frame unit including a plurality of lifting attachments each including an attachment element comprising, in combination: first and second sides spaced in a first direction;first and second edges each extending between the first and second sides, with the first and second edges spaced in a second direction perpendicular to the first direction;third and fourth edges each extending between the first and second sides and between the first and second edges, with the third and fourth edges spaced in a third direction perpendicular to the first and second directions;a first passage extending between the first and second sides in the first direction and extending from the first edge towards but spaced from the second edge in the second direction, with the first passage spaced from the third and fourth edges in the third direction; anda second passage extending between the first and second sides in the first direction and extending from the first passage towards but spaced from the third edge in the second direction, with the second passage spaced from the first, second, and fourth edges. 17. The safety apparatus as claimed in claim 16, with the attachment element further comprising, in combination: an extension extending between the first and second sides and extending from the first passage through the fourth edge in the third direction and extending from the first edge towards but spaced from the second edge in the second direction, with the second passage intermediate the extension and the second edge in the second direction, with the attachment element formed homogeneously from a same material and extending integrally between the first and second sides in the first direction, extending integrally between the first and second edges in the second direction and extending integrally between the third edge and the second passage in the third direction.
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