摘要:
A boom H for a vehicle A which carries a working implement K to enable operations to be carried out such as excavation or loading, comprises first (11) and second (10) parts, the first part (11) carrying the working implement (K) and the second part (14) being mounted on a body (B) of the vehicle, the first and second parts being connected together for relative pivotal movement about a generally horizontal axis (A 1), a fluid operated actuating means (18) acting between the first (11) and second (10) boom parts to effect relative pivotal movement at least in one sense of rotation, characterized in that the fluid operated actuating means (18) comprises two relatively movable members (20,23) which operate in tension, one member (20) being pivotally secured to one of the boom parts (14) and the other member (23) being connected via a flexible linkage (24) to the other boom part (11) to enable the two boom parts to be relatively pivoted to include a smaller angle between them than would be possible with a rigid linkage with an actuating means (18) operating in tension.
摘要:
The earth moving machine has a body having a ground engaging propulsion device and a base frame mounted on the ground engaging propulsion device. The base frame is movable relative to the ground engaging propulsion device about a first generally vertical axis. A boom extends outwardly of the body and is mounted on the base frame for movement about a second axis transverse relative to the first axis. The boom has a dipper arm mounted at an outer end thereof for movement about a third axis also transverse to the vertical axis. An excavating implement is mounted at an outer end of the dipper arm for movement about a fourth axis also transverse relative to the first vertical axis. A hydraulic ram is mounted between the dipper arm and the boom to effect movement of the dipper arm relative to the boom and hence to effect movement of the implement towards and away from the body. A counterweight is mounted on the base frame, and elements are provided for moving the counterweight towards or away from the first vertical axis in response to movement of the dipper arm relative to the boom towards or away from the body.
摘要:
A machine comprises a body (10) having a ground engaging propulsion means (11) and a base frame (14) mounted on the ground engaging means (11), the base frame (14) being movable relative to the ground engaging propulsion means (11) about a first generally vertical axis (V), a boom (30) extending outwardly of the body (10) and mounted on the base frame (14) for movement about a second axis (B) transverse relative to the first axis (V), the boom (30) having mounted at an outer end (36) thereof for movement about a third axis (71) also transverse to the first vertical axis (V), a dipper arm (37), an implement (43) mounted at an outer end (42) of the dipper arm (37) for movement about a fourth axis (T2), also generally transverse relative to the vertical axis (41), a cable (47) secured to the dipper arm (37) and connected to a winch means (50) to effect movement of the dipper arm (37) relative to the boom (30) to effect movement of the implement (43) towards the body (10), a hydraulic ram (38) mounted between the dipper arm (37) and the boom (30) to effect movement of the dipper arm (37) relative to the boom (30) and hence to effect movement of the implement (43) at least away from the body (10), and a counterweight (20a), mounted on the base frame (14), means being provided to move the counterweight (20a), towards and away from the first vertical axis (41) in response to movement of the center of gravity of the machine (10).
摘要:
Selective blocking of some amino groups in a polyamino organic compound having at least one pair of available neighboring hydroxyl and amino groups is effected by first preparing in situ transition metal salt complexes of available neighboring amino and hydroxyl group pairs in said polyamino organic compound, followed by introduction of blocking groups on the non-complexed amino groups and, finally, removing the transition metal cations from the selectively N-blocked polyamino organic compound complex to obtain a polyamino organic compound having selectively blocked amino groups.This process is particularly valuable when carrying out aminocyclitol-aminoglycoside transformations utilizing transition metal salt complexes of cupric acetate, nickel (II) acetate, cobalt (II) acetate or mixtures thereof.
摘要:
The present invention relates to ICF (Insulated Concrete Form) building technology, offering an enhancement to existing practices by presenting a structure and method that enables concrete to be placed and shaped at any angle. In addition, the present invention provides a structure and method that offers aesthetic alternatives to flat surfaces characteristic of existing concrete forming building techniques.
摘要:
A material for the storage of hydrogen is provided comprising single wall carbon nanotubes (SWNT), wherein the majority of the diameters of the single wall carbon nanotubes of the assembly range from 0.4 to 1.0 nanometers (nm), and the average length is less than or equal to 1000 nm, or the diameters of the single wall carbon nanotubes of the assembly range from 0.4 to 1.0 nanometers (nm), and the heat (−ΔH) of hydrogen adsorption of the material is within the range from 4 kcal/mole H2 to 8 kcal/mole H2. Processes for the storage and release of hydrogen using the materials are disclosed.
摘要翻译:提供了用于储存氢的材料,其包括单壁碳纳米管(SWNT),其中组合物的单壁碳纳米管的大部分直径范围为0.4至1.0纳米(nm),平均长度小于 或者等于1000nm,或组合物的单壁碳纳米管的直径范围为0.4至1.0纳米(nm),并且材料的氢吸附的热(-DeltaH)在4kcal /摩尔的范围内 H 2〜8kcal / mole H 2。 公开了使用该材料储存和释放氢的方法。
摘要:
Disclosed is a dispenser useful for dispensing a first liquid and retrieving a second liquid comprising a first conduit having an orifice for dispensing the first liquid, and a second conduit having an orifice for retrieving a second liquid in direction countercurrent to the first liquid. Also disclosed are methods for using a dispenser of the invention comprising placing a dispenser in communication with a first compartment and a second compartment, the dispenser comprising a first conduit having an orifice for dispensing the first liquid and a second conduit having an orifice for retrieving a second liquid in direction countercurrent to the first liquid; transferring the first liquid through the first conduit into the first compartment; and transferring the second liquid situated in the second compartment into the second conduit. The invention also relates to the use of the dispenser in a fueling process.
摘要:
A variable doorstop selectively determines the opening distance of an access door of a merchandising machine, the access door being mounted in channels of the merchandising machine to be slidable between an open position wherein the access door permits access to a compartment aligned therewith and a closed position wherein access to the compartment is restricted. The doorstop comprises a hinge assembly including at least one hinge. Each hinge has a backing plate for mounting the hinge on the merchandising machine and at least one abutment plate. The at least one abutment plate is rotatable about a pin of the hinge to selectively pivot the abutment plate from a non-engagement position in which the abutment plate is positioned away from the path of the access door to an engagement position in which the abutment plate is in the path of the access door. The abutment plate in the engagement position establishes the open position by restricting the access door from sliding further along the channels past the abutment plate in the engagement position as the access door is slid from the closed position to the open position.
摘要:
This invention describes a novel process whereby D-glucose and D-mannose are converted to S-3-amino-2-hydroxypropionic acid and R-3-amino-2-hydroxypropionic acid, respectively, and their N-blocked derivatives.
摘要:
A method of manufacturing a polyurethane compound comprises mixing together a polyol, a polyisocyanate compound and a catalyst and allowing the mixture to cure to form a polyurethane, and is characterised in that the catalyst is a neutral complex of a metal selected from Ti, Zr, Hf, Al, Fe, Bi or Sn and a multidentate organic ligand having: a) a number of anionic donor sites=x; b) a number of neutral donor sites, capable of forming a co-ordinate bond with the metal, =y; c) where x+y=from 5 to 8; d) x is from 2 to 4; e) the ligand molecule is of a size and conformation to enable each of the anionic donor sites and neutral donor sites to form a bond with the same metal atom.