Abstract: An adjustable armrest device has an armrest seat, a slide seat disposed on the armrest seat, and a pivot connection seat disposed on the slide seat. A disk is inserted in a center hole of the pivot connection seat. Two screw rods are disposed on the slide seat and inserted in two through holes of the disk. The pivot connection seat is disposed on an armrest holder stably. A pad is disposed on the armrest seat. A pivot post is inserted through the pad and inserted in the circular hole.

Abstract: A pumping device includes a main body having a passage defined therein through which air passes, a head, and a pivotal tube secured to the main body and rotatably received in a first end of the head. A second end of the head is communicated with the passage. The pivotal tube includes a hollow cam seat securely mounted therein. The cam seat includes a central rotating axis relative to the first end of the head. The cam seat further includes a first side with a first opening and a second side with a second opening communicated with the first opening. A distance from the central rotating axis of the cam seat to the first side is smaller than a distance from the central rotating axis of the cam seat to the second side. A retainer slidably received in the head and including a first compartment therein. A second end of the retainer includes a conical recess defined therein. A spring is mounted in the first compartment.

Abstract: A minor-amount release valve includes a valve seat having a first end mounted in a receptacle communicated with an air chamber. The valve seat includes a through hole for communicating the receptacle with atmosphere. The first end of the valve seat includes an end face having a recessed section around the through hole. A stem is slidably extended through the through hole of the valve seat in a manner that an air passage is defined between the receptacle and atmosphere. The stem includes a first end located in the receptacle and a second end for manual operation. The first end of the stem includes a flange formed thereon, the stem further including a transverse hole that communicates with the air passage. A seal ring is positioned in the recessed section of the first end of the valve seat and has a width smaller than a diameter of the transverse hole.