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1. 发明专利

DE1114456B 未知
公开(公告)号：DE1114456B
公开(公告)日：1961-10-05
申请号：DEM0038329
申请日：1958-07-19
申请人： MASTABAR MINING EQUIP CO LTD
发明人： TEBB BERNHARD , PERRY CLARENCE HERBERT
IPC分类号： E21D15/45 , E21D15/55 , F16P7/00
摘要： 894,292. Hydraulic pit props. MASTABAR MINING EQUIPMENT CO. Ltd., TEBB, B., and PERRY, C. H. July 23, 1958 [July 30, 1957], No. 24074/57. Class 20(2) An hydraulic telescopic pit prop comprises a cylinder 10 having a reservoir piston 14 with a head formed of two parts 24, 26 which may be manually separated to allow fluid from the pressure chamber 18 to flow between them to the reservoir 16 in order to release the prop. The prop is set by piston pump 38 operated by a crank 48 and a handle which when moved beyond its normal stroke causes the pump piston 40 to force the piston head part 26 down against springs 36 providing a passage past a sealing ring 34 between the two piston head parts. Specification 802,804 is referred to.

2. 发明专利

GB925590A Improvements in or relating to fluid pressure relief valves 未知
公开(公告)号：GB925590A
公开(公告)日：1963-05-08
申请号：GB1641359
申请日：1958-05-22
申请人： MASTABAR MINING EQUIP CO LTD
发明人： TEBB BERNARD , PERRY CLARENCE HERBERT
IPC分类号： B60C9/00 , E21D15/51 , F16K17/04 , F16K17/08
摘要： 925,590. Fluid-actuated valves. MASTABAR MINING EQUIPMENT CO. Ltd. May 15, 1959 [May 22, 1958; April 22, 1959], Nos. 16413/58 and 13690/59. Class 135. An excess pressure-relief valve in an hydraulic pit prop comprises a valve member carried on the forward end face of a piston and urged towards its seat by a spring and liquid trapped in a substantially closed chamber having one end wall formed by the opposite face of the piston and flowrestricting means downstream of the valve seat which on unseating of the valve member causes a build-up of pressure on the piston, rapid opening of the valve and a back pressure impulse acting on the rear face of the piston to assist the return of the valve member to its seat. As shown in Fig. 2 of the first Provisional Specification, a ball valve 18, carried by a stepped piston 22, 24 slidable with small clearances in bores 14, 15 and loaded by a spring 20, on being unseated allows restricted flow to an outlet 30. Pressure then builds up between the seat 16 and the forward face of the piston to cause rapid opening of the valve and a back-pressure impulse on the liquid already trapped in a substantially closed chamber 26 so that when the pressure at the valve inlet 12 falls the ball valve 18 is immediately reseated. As shown in Fig. 1 of the second Provisional Specification a loose ball valve 22 is carried by a piston 24 loaded by a spring 26. A chamber 12 behind the piston communicates through a bore 30 with an annular space between the housing 10 and the pit prop in which it is fitted. The space is limited by sealing rings 32, 34 to provide an auxiliary air chamber in which the air is compressed on the opening of the valve 22. The seat in this case is formed on a displaceable bush 16 sealed with respect to the housing and formed externally with a restricted passage leading to the outlet port 28. In a modification to the previous embodiment the outlet port and valve seat are adjacent each other and the restriction downstream of the seat is provided by the clearance between the valve housing and the pit prop. Specification 899,122 is referred to.

3. 发明专利

GB902188A Improvements in or relating to hydraulic supports 未知
公开(公告)号：GB902188A
公开(公告)日：1962-07-25
申请号：GB1270560
申请日：1960-04-09
申请人： MASTABAR MINING EQUIP CO LTD
发明人： TEBB BERNARD , PERRY CLARENCE HERBERT , WILBURN HARRY
IPC分类号： B66F3/42 , E21D15/45
摘要： 902,188. Hydraulic pit props. MASTABAR MINING EQUIPMENT CO. Ltd. March 27, 1961 [April 9, 1960; April 19, 1960], Nos. 12705/60 and 13580/60. Class 20 (2). In an hydraulic pit-prop comprising telescopic members 10, 12 incorporating a differential reciprocating pump unit 42, 44, the pump on the down stroke feeds pressure fluid from a cylinder 40 through a valve 74 to the underside of the ram 30, 32 of the cylinder 12 whilst on the up stroke it feeds fluid from the reservoir 12 to the cylinder 40 through valve-controlled inlet means 76, 78, 80. The connecting rod of the pump is detachably connected to a rockable spindle which is positioned by a removable pin engaging a groove therein and is journalled in a sleeve secured transversely to the member 12. The piston 42 is rendered inoperative when the prop engages the mine roof and the highpressure piston 44 cuts out at a pressure determined by an adjustable valve 52. The prop is provided with a relief valve in a capsule 82, a breather valve, in Fig. 1 (not shown), and a release valve 32 adapted to be opened by a plunger 90 when depressed by the piston 42 under suitable positioning of the pump handle. The base 14 is secured to the member 10 by a bolt 13 to permit access to the ram or is welded thereto, see Fig. 4 (not shown). Specification 898,987 is referred to.

4. 发明专利

GB802804A Improvements in or relating to hydraulic pit props 未知
公开(公告)号：GB802804A
公开(公告)日：1958-10-15
申请号：GB3521955
申请日：1955-12-08
申请人： MASTABAR MINING EQUIP CO LTD
发明人： TEBB BERNARD , PERRY CLARENCE HERBERT
IPC分类号： E21D15/45 , F04B9/14 , F04B49/18
摘要： 802,804. Hydraulic pit prop. MASTABAR MINING EQUIPMENT CO., Ltd., [formerly MASTABAR BELT FASTENING CO., Ltd.]. Nov. 21, 1955 [Dec. 8, 1955], No. 35219/55. Class 20(2) An hydraulic pit prop has a two-stage pump providing rapid extension for loading followed by setting under high pressure. Operation of shaft 31 reciprocates pistons 25 and 22 together so as to raise upper prop 17 by pumping oil from the reservoir into the space 50. After extension the hydraulic pressure allows the high pressure piston 25 to set the prop under load. External adjustment of eye 71 controls the collapse of the prop via torsion bow spring 61 as described in Specification 802,803.

5. 发明专利

GB802803A Improvements in or relating to hydraulic pit props 未知
公开(公告)号：GB802803A
公开(公告)日：1958-10-15
申请号：GB3521855
申请日：1955-12-08
申请人： MASTABAR MINING EQUIP CO LTD
发明人： TEBB BERNARD , PERRY CLARENCE HERBERT
IPC分类号： E21D15/22 , E21D15/30 , E21D15/44 , E21D15/45
摘要： 802,803. Hydraulic pit props. MASTABAR MINING EQUIPMENT CO., Ltd., [formerly MASTABAR BELT FASTENER CO., Ltd.]. Nov. 21, 1956 [Dec. 8, 1955], No. 35218/55. Class 20(2) [Also in Group XXIX] A hydraulic pit prop has a torsion spring loading a relief valve attached to a spring loaded member which can be operated externally. Turning of the shaft 31, Fig. 1, reciprocates the pistons 25 and 22 by way of the connecting rod 28 so as to raise the upper prop 17 by pumping oil from the reservoir into the space 50 (via the bore 47, chamber 43, bore 42, cylinder 21 and bore 48). External adjustment of eye 71 (by lanyard or during extension by the wedge ended cam 73) controls valves 57 and 53, Fig. 3, via plunger 67, Fig. 1, torsion bar, spring 61 and arm 62, collapse of the prop being effected by escape of oil from space 50 to the reservoir via bores 55, 56, pig. 3, and, with further movement of plunger 67, bores 51, 52. Operation of the -two - stage pump is described in Specification 802,804.

6. 发明专利

FR1164647A 未知
公开(公告)号：FR1164647A
公开(公告)日：1958-10-13
申请号：FR1164647D
申请日：1956-12-06
申请人： MASTABAR MINING EQUIP CO LTD
发明人： TEBB BERNARD , PERRY CLARENCE HERBERT
IPC分类号： E21D15/45 , F04B9/14 , F04B49/18
摘要： 802,804. Hydraulic pit prop. MASTABAR MINING EQUIPMENT CO., Ltd., [formerly MASTABAR BELT FASTENING CO., Ltd.]. Nov. 21, 1955 [Dec. 8, 1955], No. 35219/55. Class 20(2) An hydraulic pit prop has a two-stage pump providing rapid extension for loading followed by setting under high pressure. Operation of shaft 31 reciprocates pistons 25 and 22 together so as to raise upper prop 17 by pumping oil from the reservoir into the space 50. After extension the hydraulic pressure allows the high pressure piston 25 to set the prop under load. External adjustment of eye 71 controls the collapse of the prop via torsion bow spring 61 as described in Specification 802,803.

7. 发明专利

DE1064907B 未知
公开(公告)号：DE1064907B
公开(公告)日：1959-09-10
申请号：DEM0032498
申请日：1956-11-29
申请人： MASTABAR MINING EQUIP CO LTD
发明人： TEBB BERNARD , LANE TRANBY , PERRY CLARENCE HERBERT
IPC分类号： E21D15/22 , E21D15/30 , E21D15/44 , E21D15/45

8. 发明专利

BE575723A Perfectionnements dans ou relatifs aux soupapes reniflantes pour appreils hydrauliques. 未知
公开(公告)号：BE575723A
公开(公告)日：1959-05-29
申请号：BE575723
申请日：1959-02-14
申请人： MASTABAR MINING EQUIP CO LTD
发明人： TEBB BERNARD , PERRY CLARENCE HERBERT , FRYATT LESLIE ALVA
IPC分类号： F16K17/36 , F06K

9. 发明专利

FR1162002A 未知
公开(公告)号：FR1162002A
公开(公告)日：1958-09-08
申请号：FR1162002D
申请日：1956-12-06
申请人： MASTABAR MINING EQUIP CO LTD
发明人： TEBB BERNARD , PERRY CLARENCE HERBERT
IPC分类号： E21D15/22 , E21D15/30 , E21D15/44 , E21D15/45

10. 发明专利

GB1017231A Improvements in or relating to hydraulic props 未知
公开(公告)号：GB1017231A
公开(公告)日：1966-01-19
申请号：GB4417460
申请日：1960-12-22
申请人： MASTABAR MINING EQUIP CO LTD
发明人： TEBB BERNARD , PERRY CLARENCE HERBERT
IPC分类号： E21D15/45 , E21D15/55 , F16P7/00
摘要： 1,017,231. Hydraulic pit props. MASTABAR MINING EQUIPMENT CO. Ltd. Dec. 7, 1961 [Dec. 22, 1960], No. 44174/60. Addition to 894,292. Heading E1E. In an hydraulic pit prop comprising inner and outer members 12, 10, a ram 26 separating the reservoir from the pressure chamber thereof and wherein a two-stage pump and valve means 40 are provided for prop extension purposes, the ram carries an hydraulic main seal 28 presenting a pair of spaced annular sealing lips 50, 52 resting respectively against the ram and the member 10. The ram is made in two relatively movable parts 30, 32 which when separated by excess movement of the pump plungers against the action of a spring 60 breaks the seal to allow collapse of the prop, the lips of the seal being normally urged apart by a spreader ring 56 carried by the member 32. The spreader ring may be of circular or wedgeshaped cross-section, see Figs. 3 and 4 (not shown). The device also incorporates a pressure relief valve 82 and an initial unloading valve 86.

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