1. A firearm comprising a frame, a barrel and a stock comprising a body and a recoil pad at one end of the stock, intended for pushing the arm against the shoulder andor cheek of the gunman,
containing a hydraulic recoil kick absorption mechanism and in which the recoil pad is connected to the stock by means of said absorption mechanism, and containing a return spring which in rest works on the recoil pad pushing in it away form the body of the stock
wherein,
the absorption mechanism comprises a shock absorber comprising a cylinder and a piston mounted in a sliding manner in this cylinder and integrally connected to a rod which partially extends from the absorber, the rod being connected to respectively the body of the stock or the recoil pad and the cylinder being connected to respectively the recoil pad or the body of the stock, and two oil chambers which are connected internally via a first calibrated oil passage and of which the volume of one chamber decreases under the effect of the piston while the volume of the other chamber increases,
and the absorber is placed in such a way that during a shot the stock has a tendency to move down from the shoulder and the cheek of the gunman.
2. The firearm according to claim 1, wherein the absorber is placed in such a way that when the body of the stock is pushed towards the recoil pad the body of the stock moves down with respect to the recoil pad.
3. The firearm according to claim 1 wherein the absorber is placed in such a way that when the body of the stock is pushed towards the recoil pad the body of the stock moves down with respect to the recoil pad and the axis of the absorber forms a downward angle with the axis of the barrel.
4. The firearm according to claim 1 wherein the shock absorber is placed in such a way that the axis of the absorber forms an angle with the base of the recoil pad facing the foot of the body of the stock.
5. The firearm according to claim 1 wherein said first oil passage is formed by a jet.
6. The firearm according to claim 1 wherein the two oil chambers are connected by a second passage in which is provided a one-way valve, said second passage allowing a larger flow rate of oil than said first passage.
7. The firearm according to claim 6 wherein said one-way valve is a valve with a ball which in rest closes the orifice of said second passage by the action of an non-return spring.
8. The firearm according to claim 7 wherein said one-way valve is mounted in such a way that said ball is pushed towards an open position against the action of said non-return spring when said recoil pad is pushed away from the body of the stock.
9. The firearm according to claim 1 wherein said return spring is mounted inside the absorber and works on the piston.
10. The firearm according to claim 1 in which the recoil pad absorbs the kick caused by a shot.
11. The firearm according to claim 1 wherein the piston of the shock absorber is a single piston which dived the internal compartment of the cylinder into two closed oil chambers which are connected by an internal oil passage in the piston.
12. The firearm according to claim 1 wherein the piston of the shock absorber is a double piston connected by a rod and closing off a compartment which is divided into two oil chambers by an internal neck in the cylinder, the two oil chambers being connected by an oil passage in the neck.
13. The firearm according to claim 1 wherein the space between the body of stock and the recoil pad is covered by a sleeve.
14. The firearm according to claim 1 wherein it is provided with means to prevent the rotation of the recoil pad around the shock absorber.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An implantable access port assembly, for use in conjunction with an inflatable gastric band for the treatment of obesity, the access port assembly being for implantation in a patient by attachment to a tissue of the patient, the access port assembly comprising:
an access port having a bottom, a sidewall, a septum that is made of a material that is needle penetrable, and a fluid reservoir under the septum, the septum being constructed to allow a needle to penetrate the septum and pass fluid to or from the fluid reservoir wherein the access port has a central axis extending through the bottom, the septum, and the fluid reservoir;
a housing sidewall for receiving the access port wherein the housing sidewall has an outer sidewall surface surrounding and being radially spaced from the central axis;
a coupler integrated with the housing sidewall;
a tissue attachment mechanism integral to the access port and having a plurality of reversibly deployable tissue penetrating anchors;
an outlet barb extending from the fluid reservoir and constructed to allow fluid to pass to or from the fluid reservoir;
a tube having a first end and a second end and a length from the first end to the second end, the first end positioned around and coupled to the outlet barb, the second end being constructed to couple to the inflatable gastric band, the tube being in fluid communication with the fluid reservoir for transmitting to transmit a fluid to and from the fluid reservoir to and from the inflatable gastric band via the outlet barb, the tube being in fluid communication with the fluid reservoir;
a strain relief element locked into the coupler and being positioned around the outlet barb and a portion of the tube adjacent to the access port, the strain relief element being constructed to protect the portion of the tube adjacent to the access port from folding, rotating or torquing;
a flexible sleeve not formed integral with the tube and constructed out of a puncture resistant material having a greater resistance to puncture by the needle than the material the septum is made out of, and configured to overlay overlaying a portion of the strain relief element positioned around a portion of the tube, and being positioned around a portion of the tube adjacent the strain relief element without being positioned around the entire length of the tube; and
wherein the coupler extends outward from the outer sidewall surface and in a direction outward from the central axis, and has a first sidewall portion, a second sidewall portion, and a top portion, each of the portions of the coupler extending in a direction outward from the central axis, the first and the second sidewall portions being positioned at opposing sides of the outlet barb, the top portion extending over and covering the outlet barb and connecting the first sidewall portion to the second sidewall portion, and a portion of the strain relief element has a rectangular shape and is constructed to lock into the coupler by being pushed into the coupler.
2. The access port assembly of claim 1 wherein the flexible sleeve is constructed to provide strain relief for the portion of the tube adjacent the strain relief element.
3. The access port assembly of claim 1, wherein the first and second sidewall portions each extend vertically and the top portion extends horizontally.
4. The access port assembly of claim 3, wherein the strain relief element is constructed to be locked to the coupler without the strain relief element being rotated.
5. The access port assembly of claim 4, wherein the housing sidewall includes suturing holes constructed to receive sutures to fix the access port assembly to the tissue of the patient.