97results about How to "Reduce spring force" patented technology

A hole punch device that reduces the force required to create a hole in papers or other sheet media. A punch element of the hole punch device includes a locally sloped or indented floor to create a bend in the sheet media as it is punched to create an enlarged, oval hole. The punch pin may include an expanding sleeve surround the pin that forms a larger diameter during the cutting stroke and springs back to a smaller diameter during a pull out stroke. A coiled torsion return spring is positioned remotely from and non-coaxially with the punch pin. A keyed pin and support frame arrangement ensures a predetermined rotational orientation of the pin for sequential cutting for reduced cutting force. A long lead-in surface in the frame helps installing sheet media into the feed slot of the punch element.

The door closer includes one rectangular casing, which has closing screws and end caps on two sides and one protecting board between two end caps, and is separated into one spring cavity, one crankshaft cavity and one pressure balancing cavity; one opening piston and one compression spring connected together inside the spring cavity; and one driving device inside the crankshaft cavity and including one driving shaft, one cam disc connected to the driving shaft, one operating arm with one end connected to the driving shaft and one sliding block connected to the other end of the operating arm and capable of shifting inside one slide rail.

The invention relates to a switching arrangement having two operating positions for switching a coil during transformer operation, wherein a through current commutates from one current path to anothercurrent path during the switching operation. For this purpose, fixed contacts are arranged on an insulation material frame on multiple horizontal planes about a pivoting selector shaft, said contactshaving upper and lower contact fingers that can be spread apart and can be interconnected as movable switching contacts by means of an electrically conducting terminal.

A bunch sheet depository is described. The depository comprises: a pressure plate for pressing on a bunch of sheets; a picker aligned with the pressure plate and arranged to remove sheets individually from the bunch of sheets; a link arm including (i) a pivot, (ii) an urging portion coupled to the pressure plate and (iii) a resilient member; and an actuator coupled to the resilient member. The actuator is operable, when actuated, to move the resilient member to rotate the link arm about the pivot and thereby cause compression of the bunch of sheets by the pressure plate using a force from the resilient member that reduces as the resilient member relaxes in response to the pressure plate moving as sheets are removed from the bunch of sheets.

A valve system for providing closing force to one or more valves of an engine is provided. In one example, the system comprises a first tappet bore in fluid communication with a second tappet bore via a bidirectional oil passage. The system may provide valve closing forces to assist in the closing of valves coupled to the tappet bores, lowering required valve spring forces.

In a card connector to be connected to a card, An ejecting member is provided so as to be movable along a predetermined plane for ejecting the card in an ejecting direction. The ejecting member has a card contacting portion to be contacted with the card and a cam-operated portion. The ejecting member is urged towards the ejecting direction by a urging member. A cam mechanism is provided so as to movable along the predetermined plane in a direction intersecting the ejecting direction. The cam mechanism is elastically supported by a supporting member so that it is disposed at a predetermined position. The cam mechanism has a cam portion for controlling a position of the ejecting member in cooperation with the cam-operated portion.

The present invention discloses a water closet comprising a variable soil exhaust system which can improve durability and reduce an amount of flush water. The water closet according to the present invention comprises a variable siphon soil exhaust system including: a flexible water bladder installed at a rear side of a bowl to be connected to a water supply passage, a tension spring for applying an elastic force to contract the water bladder, a variable siphon tube connected to the water bladder via a bracket to allow soil to be exhausted from the bowl while lifted and lowered by an expanding and contracting motion of the water bladder, and a small tube for connecting the water bladder to the variable siphon tube; and a cover installed to surround the soil exhaust system. The cover is formed by coupling first and second half covers of the same shape and comprises a first port connected to the water supply passage, a second port connected to the bowl, and a third port connected to a bottom tube laid under the floor; the variable siphon tube has one end connected to the bowl through a bellows tube and the other end communicating with the interior of the cover; and the tension spring is installed within the water bladder in such a manner that an upper end thereof is fixed to an upper catching portion installed at an outlet of the water supply passage and a lower end thereof is fixed to a lower catching portion provided on the bracket or a bottom surface of the water bladder.

A self-opening/closing umbrella includes a central shaft unit having an improved structure. The central shaft unit forms a raised channel on one side of a third shaft segment and a pulley is pivotally mounted to a lower portion of the raised channel. A second shaft segment has a top to which an internal plug including a pulley is fixed and includes a first pull rope having an end fixed to a bullet-head member and an opposite end extending upward to warp around the pulley of the internal plug, projecting through a sideway slot, extending downward to wrap around the pulley inside the third shaft segment for upward extension to fix to a top end of the third shaft segment. A second pull rope has an end fixed to the internal plug and an opposite end extending across a top cap to project outward to fix to the runner.

The invention discloses a novel study desk used on a common table. The novel study desk is provided with a desktop board, wherein an upward myopia prevention rack is arranged at a proper position, which is close to a user, on the desktop board; a reading rack connection body is arranged at a proper position, which is far away from the user, on the desktop board; the connection body is connected with a book support; a bookend perpendicular to the book support is arranged at the lower part of the bookend; a book back groove which is perpendicular to the bookend and is sunken into a book support surface is formed in the middle part of the book support surface; a hanging sliding device is arranged on each of the left and right sides of the book support in the horizontal direction; the hanging sliding devices are connected with sliding hanging bodies in a relatively sliding manner; the sliding hanging bodies are connected with book clamp lower buckling plates; the sliding hanging bodies or the book clamp lower buckling plates are connected with spring devices; the spring devices are connected with book clamp upper buckling plates; the spring devices are arranged on the book clamp upper buckling plates and are connected with small book clamp buckling plates; and desk legs extending to a common tabletop are arranged at proper positions of the desktop board. According to the novel study desk, a book can be clamped on the book support for use; the book can be heightened or lowered, and the visual angle and the distance can be adjusted; and the novel study desk is an ideal study desk that every family can afford.

Devices and related methods are disclosed that generally involve variable force valve springs for controlling the motion of an engine valve. The force exerted by the valve spring can be adjusted by altering the pressure at which a fluid is supplied to a fluid chamber thereof, by altering the volume of the fluid chamber, and/or by changing the aggregate surface area over which fluid pressure is coupled to the engine valve. Associated fluid control systems are also disclosed herein, as are various methods for adjusting the force of a valve spring based on a variety of engine parameters, such as engine speed, engine load, and/or a combination thereof.

The invention belongs to an automatic flight control technology, particularly relating to an embedded friction clutch which is used in an actuating mechanism of an airborne automatic flight control system and can also be used in other control systems. In recent years, various friction clutches are required to be used in actuating mechanisms (such as a fuel control rod mechanism and an electric steering engine) in airborne automatic flight control systems of new developed airplanes in China. Along with increasing of requirements on reliability, safety and service life of the airplanes, conventional friction clutches cannot meet requirements. In order to solve the problem, the high-stability embedded friction clutch which is wear-resistant, resists high-temperature and low-temperature environments and is long in service life is required. The invention provides the friction clutch which is compact in structure and has high stability and high wear resistance in a transmission process.

A connector body includes a mating guide part having a mating recess, a reinforcing bracket includes a body part attached to the outer side of an end wall part of the mating guide part, an end wall cover part connected to an upper end of the body part and covers an upper side and an inner side of the end wall part, and a contact arm connected to a lower end of the end wall cover part, the contact arm includes a bottom surface part extending along a bottom surface of the mating recess and an upright part extending upward from a tip of the bottom surface part, and the upright part includes a contact projection near a tip thereof, the contact projection extending toward the center in the width direction of the connector body.

A valve stem seal (1) seals a valve stem (4) that is reciprocally movable in an axial direction. The valve stem seal includes a base body (8) that is connectable with a valve stem guide (6). A first seal lip (10) is resiliently positioned relative to the base body via an elastic connection (16) and seals the valve stem relative to an oil chamber (24). A second seal lip (12) is spaced in the axial direction (2) from the first seal lip and seals the valve stem relative to a gas chamber. The second seal lip is also resiliently positioned relative to the base body via the elastic connection.

Spinal adjustment system including at least three implant modules, at least one of the implant modules being a first implant module including:

• • means for engaging the first implant module with a first vertebra; and
  • first force application means;

characterised in that:

the first force application means is adapted to engage with a second implant module engaged with a second vertebra superior to the first vertebra;

the first force application means is adapted to also engage with a third implant module engaged with a third vertebra inferior to the first vertebra; and

the first implant module includes means of adjusting the force applied to the first vertebra by the first force application means.

The invention relates to a piston for realizing sealing by expanding a sealing piece with hydraulic force. The piston with a sealing piece comprises a piston body and a sealing piece, wherein the sealing piece is annular; the section of the sealing piece is V-shaped; the opening of the V-shaped section faces inwards; the outer circumferential surface of the piston body is provided with an annular groove; the groove bottom surface of the annular groove projects outwards; the sealing piece is arranged in the annular groove; the inner surface of the sealing piece is jointed with the groove bottom surface of the annular groove; the upper end face or the lower end face of the piston body is provided with a first oil hole; the middle part of the groove bottom surface of the annular groove is provided with at least one second oil hole; and each second oil hole is communicated with the first oil hole. The piston has an automatic pressure compensation sealing function, high-pressure oil can be prevented from flowing into the upper part of a piston cylinder from a gap between the piston cylinder and the piston, and hydraulic energy is saved simultaneously.

An expansion valve for a refrigerant cycle has an orifice passage portion, a valve body, a spring member and a deformation portion. The orifice passage portion is configured for decompressing and expanding a high pressure refrigerant into a low pressure refrigerant. The valve body is disposed to open and close the orifice passage portion so that a flow rate of the low pressure refrigerant flowing into a low pressure passage portion is controlled in accordance with a valve opening degree. The spring member is disposed between the valve body and the deformation portion for applying a biasing force to the valve body. The deformation portion is plastically deformable in a direction parallel to an expansion and contraction direction of the spring member by applying an external force.