IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0605599
(2006-11-28)
|
등록번호 |
US-8240431
(2012-08-14)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
5 인용 특허 :
25 |
초록
▼
A roofing worker safety device is provided that delivers a resistive force in response to a worker falling from an elevated work surface such as a roof via a safety cable connecting the worker to the safety device, the cable transmitting the force of the falling worker to the device to activate an a
A roofing worker safety device is provided that delivers a resistive force in response to a worker falling from an elevated work surface such as a roof via a safety cable connecting the worker to the safety device, the cable transmitting the force of the falling worker to the device to activate an arrestor arm that is forced into the surface on which the safety device is placed thereby stopping the fall of a worker from the roof.
대표청구항
▼
1. An apparatus adapted for use on an elevated surface, and for arresting the fall of a person from the surface, the apparatus comprising: an apparatus support defining lateral and longitudinal extents,an arrestor assembly connected to said apparatus support, and further comprising: an arrestor arm
1. An apparatus adapted for use on an elevated surface, and for arresting the fall of a person from the surface, the apparatus comprising: an apparatus support defining lateral and longitudinal extents,an arrestor assembly connected to said apparatus support, and further comprising: an arrestor arm fully contained within the extents, pivotally mounted to the support at a first end, and presenting a free second end, wherein the arm is shiftable between a raised non-engaged position and a lowered engaged position, and a gravitational moment-force acts upon the arm at the second end,a gripping plate fully contained within the extents, and secured to the second end, wherein the plate is spaced from the surface in the non-engaged position, and bears upon, so as to grip, the surface in the engaged position,a bias member drivenly coupled to the arm and generating a second force greater than the gravitational moment-force, so as to normally retain the second end in the non-engaged position, anda tether configured for connection to said person, connected to the arm, and operable to transmit an additional force to the arm when the person undergoes a fall from the surface, such that the additional and gravitational-moment forces cooperatively overcome the second force and cause the arm to shift to the engaged position, thereby arresting the fall. 2. The apparatus as claimed in claim 1 wherein said bias member includes a spring. 3. The apparatus as claimed in claim 1 wherein said bias member includes a pneumatic cylinder. 4. The apparatus as claimed in claim 1 wherein said bias member includes a hydraulic cylinder. 5. An apparatus for arresting a fall of a person, comprising: a vehicle having a vehicle structure and tires for placement on a roof surface;an arrestor assembly connected to the vehicle structure, shiftable between a raised position and a lowered position, and further including, an arrestor arm spaced away from the roof surface in the raised position, the arrestor arm being biased in the raised position by an arm support, andan engagement plate connected to the arrestor arm, the engagement plate being spaced from the roof surface and adjacent to the vehicle structure when in the raised position and the engagement plate engaging the roof surface in the lowered position;an internal cable defining a first end and a second end, the first end being coupled to the arrestor assembly to communicate a force to the arrestor assembly, wherein the force causes the arm to shift to the lowered position;a cable passage fixedly connected to the vehicle structure and including an angle mount defining a cross-sectional opening having a maximum diameter through which the internal cable is entrained; anda cable connector member connected to the second end of the internal cable and disposed adjacent the mount opposite the arm, presenting a lateral dimension greater than the diameter, so as to limit cable travel in one-direction and cooperatively define the non-engaged position, and configured for removable attachment to at least one safety cable opposite the internal cable. 6. The apparatus as claimed in claim 5, wherein the angled mount has side walls that are angled at approximately 45 degrees with respect to a side wall of the cable passage. 7. The apparatus as claimed in claim 5, further comprising a cable throat mounted on said support structure, said tether passing therethrough. 8. The apparatus as claimed in claim 7, wherein the cable throat has a mouth with side walls at approximately 45 degrees with respect to a side wall of the cable throat. 9. The apparatus as claimed in claim 5, wherein the engagement plate and the arrestor arm are disposed between each set of adjacent tires and generally beneath the vehicle structure.
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