IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0368236
(1989-06-19)
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발명자
/ 주소 |
- Sweeney Gerald T. (Puyallup WA)
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출원인 / 주소 |
- Aardvark Corporation, Inc. (Puyallup WA 02)
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인용정보 |
피인용 횟수 :
52 인용 특허 :
3 |
초록
▼
The end portions of the pipe section 2 have annular rabbets 14 and 16 in the outer and inner peripheral surfaces 10 and 12 thereof. The axially extending surfaces 14″and 16″of the rabbets are tapered substantially at a common angle so that when a pair 2′and 2″of the pipe sections are reversedly disp
The end portions of the pipe section 2 have annular rabbets 14 and 16 in the outer and inner peripheral surfaces 10 and 12 thereof. The axially extending surfaces 14″and 16″of the rabbets are tapered substantially at a common angle so that when a pair 2′and 2″of the pipe sections are reversedly disposed end-to-end of one another, and driven together, the two sections form a male/female joint 18 therebetween. The joint is preserved by providing sets of axially successive ribs 20 and grooves 22 on the axially extending surfaces of the rabbets, which interengage with one another when the ends 8 of the sections abut the transversely disposed surfaces 14′and 16′of the rabbets.
대표청구항
▼
In the combination of a pair of male/female pipe sections of semi-rigid but resiliently distensible plastic material, which are arranged end-to-end of one another along a common axis and have relatively outer and inner peripheral surfaces thereon, and annular rabbets formed on the adjacent end porti
In the combination of a pair of male/female pipe sections of semi-rigid but resiliently distensible plastic material, which are arranged end-to-end of one another along a common axis and have relatively outer and inner peripheral surfaces thereon, and annular rabbets formed on the adjacent end portions thereof at the relatively outer and inner peripheral surfaces thereof, respectively, so that the end portion of the male pipe section can be slideably inserted within the end portion of the female pipe section to form a male/female joint therebetween when the pipe sections are reciprocated relatively toward one another along the axis to be joined together, the improvement wherein: the rabbets have surfaces which are disposed relatively transverse the axis, and surfaces which extend relatively lengthwise of the axis, the axially extending surfaces of the rabbets have cooperatively engageable retainer means thereon comprising successive sets of axially successive and axially contiguous ribs and grooves relatively raised thereon and recessed therein, respectively, the respective crests and bottoms of which ribs and grooves extend in full circles about the axis of the pipe sections, the crests of the respective ribs of the male pipe section and the bottoms of the respective grooves of the female pipe section extend at their centers in axially spaced relatively outer circles coinciding substantially with a common relatively outer cylindrical surface of revolution about the axis, and the bottoms of the respective grooves of the male pipe section and the crests of the respective ribs of the female pipe section extend at their centers in axially spaced relatively inner circles coinciding substantially with a common relatively inner cylindrical surface of revolution about the axis spaced relatively inwardly thereof from the relatively outer cylindrical surface of revolution thereabout, the axial spacing between the relatively outer circles is the same both between the crests of adjacent ribs on the male pipe section and between the bottoms of adjacent grooves on the female pipe section, and the axial spacing between the relatively inner circles is the same both between the bottoms of adjacent grooves on the male pipe section and between the crests of adjacent ribs on the female pipe section, and the shape and size of the ribs is the same on both the male and female pipe sections, and the grooves on the respective male and female pipe sections correspond in shape and size to the ribs thereof, so that when the end portion of the male pipe section is slideably inserted within the end portion of the female pipe section in forming the joint, each rib on the male pipe section progressively cooperatively engages, first with that groove on the female pipe section which is axially adjacent the end of the female pipe section, and then with each successive groove thereafter on the female pipe section, and in so doing, the body of each rib on the male pipe section substantially fills, first the aforesaid end adjacent groove on the female pipe section and then each successive groove thereafter, until the ends of the respective pipe sections abut the transversely disposed surfaces of the rabbets and the sets of ribs and grooves are interlocked in succession with one another to complete the joint, the respective ribs of the respective male and female pipe sections have leading flanks thereon which are disposed on those sides of the respective ribs oriented axially toward the respective ends of the respective pipe sections, and the leading flanks are conical and tapered toward the axis from the crests of the respective ribs for a distance sufficiently greater than the aforesaid spacing between the relatively inner and outer cylindrical surfaces of revolution about the axis, that the leading flanks form cam surfaces of sufficiently low acuity to the axis that when the end portion of the male pipe section is slideably inserted within the end portion of the female pipe section in forming the joint, the end portion of the female pipe section is progressively distended about the axis by the end portion of the male pipe section when the sets of ribs and grooves advance across one another from set to set, to enable the end portions of the pipe sections to be ratcheted together in successive stages in which the sets of ribs and grooves cooperatively engage one another as recited hereinabove, and alternately, advance across one another form set to set as the end portion of the female pipe section distends to accommodate the advance, and the respective ribs of the respective male and female pipe sections have trailing flanks thereon which are disposed on the opposing sides thereof oriented axially toward the respective transversely disposed surfaces of the respective rabbets on the respective end portions thereof, and the trailing flanks of the respective ribs are inclined to the axis from the crests of the respective ribs at substantially a common angle thereto adapted so that when the ends of the respective pipe sections abut the transversely disposed surfaces of the rabbets and the sets of ribs and grooves interlock in succession with one another to complete the joint, the end portions of the pipe sections are sufficiently interengaged to preserve the joint for use.
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