IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0057175
(2002-01-24)
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발명자
/ 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
8 |
초록
▼
An automatic feed system 10 is provided for advancing a hydraulically powered work head into a workpiece being cut. A hydraulic fluid powered work head motor 40 drives a diamond drill cutting tool 46 or other cutting tool to cut the workpiece, such as concrete G. Hydraulic pressure in an inlet line
An automatic feed system 10 is provided for advancing a hydraulically powered work head into a workpiece being cut. A hydraulic fluid powered work head motor 40 drives a diamond drill cutting tool 46 or other cutting tool to cut the workpiece, such as concrete G. Hydraulic pressure in an inlet line 42 feeding hydraulic fluid to the work head motor 40 is monitored to detect when high torque and hence high wearing forces are experienced by the diamond cutting tool 46. A feed motor 30 or other advance is provided to feed the diamond cutting tool 46 into the workpiece. A valve 50 is provided which is pressure sensitive and controls the feed rate of the feed motor 30 in response to pressure in the inlet line 42 delivering hydraulic fluid to the work head motor 40. In this way, a feed rate of the bit 46 or other cutting tool into the workpiece is reduced when high stress conditions exist on the cutting surface of the diamond drill cutting tool 46 or other cutting tool.
대표청구항
▼
An automatic feed system 10 is provided for advancing a hydraulically powered work head into a workpiece being cut. A hydraulic fluid powered work head motor 40 drives a diamond drill cutting tool 46 or other cutting tool to cut the workpiece, such as concrete G. Hydraulic pressure in an inlet line
An automatic feed system 10 is provided for advancing a hydraulically powered work head into a workpiece being cut. A hydraulic fluid powered work head motor 40 drives a diamond drill cutting tool 46 or other cutting tool to cut the workpiece, such as concrete G. Hydraulic pressure in an inlet line 42 feeding hydraulic fluid to the work head motor 40 is monitored to detect when high torque and hence high wearing forces are experienced by the diamond cutting tool 46. A feed motor 30 or other advance is provided to feed the diamond cutting tool 46 into the workpiece. A valve 50 is provided which is pressure sensitive and controls the feed rate of the feed motor 30 in response to pressure in the inlet line 42 delivering hydraulic fluid to the work head motor 40. In this way, a feed rate of the bit 46 or other cutting tool into the workpiece is reduced when high stress conditions exist on the cutting surface of the diamond drill cutting tool 46 or other cutting tool. rom the side of the first object, wherein the head of the fastener is positioned. 13. A combination as defined in claim 1, wherein the spring fastener comprises more than one engagement regions. 14. A combination as defined in claim 1, wherein the head portion of the fastener comprises an upper side and a lower side. 15. A combination as defined in claim 14, wherein the spring fastener comprises engagement regions under the upper side of the head. 16. A spring fastener comprising: (a) a substantially flat head portion having an engageable hole through which an expanding member can pass through and engage; (b) a neck having an opening and two side neck portions, the neck extending from the lower side of the substantially flat head portion at a substantially right angle with respect to the substantially flat head portion; (c) two substantially flat legs extending from the neck, each leg having an inner surface and a contact region, the two inner surfaces of the two legs being at an initial proximity with each other, the legs being expandable in opposite directions upon inserting the expanding member; and (d) a Y-shaped funnel in the vicinity of the contact region, the Y-shaped funnel having a first width, and funnel sides having been formed by partially cut leg portions extending outwardly from the legs, funnel bents, and inwardly bent portions with edges, the inwardly bent portions being of adequate size so as to partially extend into a slot of a first object, when the fastener is positioned in the slot. 17. A spring fastener as defined in claim 16, wherein the head portion of the fastener comprises an upper side and a lower side. 18. A spring fastener as defined in claim 16, wherein the head portion of the fastener has a single side corresponding to the lower side. 19. A spring fastener as defined in claim 16, wherein the hole is substantially round having a diameter, and the first width is longer than the diameter of the hole. 20. A spring fastener as defined in claim 16, wherein the hole comprises an oblong opening having a second width, the second width being at least as long as the first width. 21. A spring fastener as defined in claim 16, wherein the expanding member is a screw having threads, a root, and a pitch. 22. A spring fastener as defined in claim 16, wherein the fastener comprises an elastic body molded at least at the lower side of the head of the fastener. 23. A spring fastener as defined in claim 16, wherein the edges of the inwardly bent portions are substantially straight. 24. A spring fastener as defined in claim 16, wherein the edges of the inwardly bent portions comprise curved portions. 25. A spring fastener as defined in claim 16, wherein the funnel bents comprise ribs. 26. A spring fastener as defined in claim 16, wherein the slot of the first object has a width, and the funnel bents are separated by a distance larger than the width of said slot. 27. A spring fastener as defined in claim 16, wherein the first object has a thickness, and each of the funnel bents is separated from the lower side of the head by a distance smaller than the thickness of said first object. 28. A spring fastener as defined in claim 16, wherein the bents have an angle which is adequately large to allow the fastener to be removed from the first object without destruction of said fastener, when the removal takes place solely from the side of the first object, wherein the head of the fastener is positioned. 29. A spring fastener as defined in claim 16, comprising more than one engagement regions. 30. A spring fastener as defined in claim 17, comprising engagement regions under the upper side of the head. 31. A vehicle comprising a first object having a slot and a second object having a hole, connected with a spring fastener, the spring fastener comprising: (a) a substantially flat head portion having an engageable hole through which an expanding member can pass through and engage; (b) a neck having an opening and two side neck portions, the neck extending from the lower side of the substantially flat head portion at a substantially right angle with respect to the substantially flat head portion; (c) two substantially flat legs extending from the neck, each leg having an inner surface and a contact region, the two inner surfaces of the two legs being at an initial proximity with each other, the legs being expandable in opposite directions upon inserting the expanding member; and (d) a Y-shaped funnel in the vicinity of the contact region, the Y-shaped funnel having a first width, and funnel sides having been formed by partially cut leg portions extending outwardly from the legs, funnel bents, and inwardly bent portions with edges, the inwardly bent portions being of adequate size so as to partially extend into the slot of the first object, when the fastener is positioned in said slot. 32. A vehicle as defined in claim 31, wherein the head portion of the fastener comprises an upper side and a lower side. 33. A vehicle as defined in claim 31, wherein the head portion of the fastener has a single side corresponding to the lower side. 34. A vehicle as defined in claim 31, wherein the engageable hole is substantially round having a diameter, and the first width is longer than the diameter of the hole. 35. A vehicle as defined in claim 31, wherein the engageable hole comprises an oblong opening having a second width, the second width being at least as long as the first width. 36. A vehicle as defined in claim 31, wherein the expanding member is a screw having threads, a root, and a pitch. 37. A vehicle as defined in claim 31, wherein the fastener comprises an elastic body molded at least at the lower side of the head of the fastener. 38. A vehicle as defined in claim 31, wherein the edges of the inwardly bent portions are substantially straight. 39. A vehicle as defined in claim 31, wherein the edges of the inwardly bent portions comprise curved portions. 40. A vehicle as defined in claim 31, wherein the funnel bents comprise ribs. 41. A vehicle as defined in claim 31, wherein the slot of the first object has a width, and the funnel bents are separated by a distance larger than the width of said slot. 42. A vehicle as defined in claim 31, wherein the first object has a thickness, and each of the funnel bents is separated from the lower side of the head by a distance smaller than the thickness of said first object. 43. A vehicle as defined in claim 31, wherein the bents have an angle which is adequately large to allow the fastener to be removed from the first object without destruction of said fastener, when, in the absence of the second object, the removal takes place solely from the side of the first object, wherein the head of the fastener is positioned.
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