SHOCK ABSORBER
FIG7 shows an enlarged detail view C as indicated in FIG5b, focusing on the inner and outer sealing units enlarged even more than in FIG6
As shown in FIG7, the housing 5 is provided with a cylindrical portion 16 surrounding the piston rod 4, and an inner end of the cylindrical portion 16 is provided with a radially inwards extending flange 17. The cylindrical portion 16 provides an abutment surface for the inner 11 and outer 12 sealing members. Further, the radially inwards extending flange 17 prevents the outer sealing unit 9 from moving into the housing 5. This allows for assembly of the outer sealing unit 9 by sliding the inner 11 and outer 12 members of the outer sealing unit 9 along the piston rod 4 and pushing the outer sealing unit 9 into position within the cylindrical portion until it bottoms onto the flange 17. Thereafter, the outer sealing member 12 may be kept in position by any suitable means, such as by the previously discussed locking ring 27 or by threads on the inner 11 and/or outer 12 sealing members engaging corresponding threads of the housing 5. The housing 5 and the cylinder 2 may be configured to jointly clamp a portion of the flexible member 14 between the housing the cylinder as shown in FIG7. In other embodiments, other means for clamping the flexible member 14 may be provided, such as a separate ring or a portion of the outer end cap 23.
enlarged view
7
first end opening
5
housing
12
outer
30
corresponding threads
11
inner
14
member
17
flange
18
inner
19
outer
2
cylinder
20
inner end cap
16
cylindrical portion
27
locking ring
10
inner sealing unit
13
space
['1. A shock absorber (1) comprising a hydraulic damper; and a pneumatic spring; wherein the damper comprises a cylinder (2), a piston (3) arranged in said cylinder (2), and a piston rod (4) attached to said piston (3), wherein the piston (3) divides the cylinder (2) into separate chambers, wherein the pneumatic spring comprises a housing (5) provided with a first end opening (7) through which the piston rod (4) extends, wherein the shock absorber (1) is provided with an outer sealing unit (9) configured to seal between the piston rod (4) and the housing (5) by the first end opening (7), wherein the outer sealing unit (9) comprises an inner sealing member (11) and an outer sealing member (12) together defining a liquid space (13) between the piston rod (4) and the housing (5), said liquid space (13) comprising a sealing liquid, such as damper oil.', '5. A shock absorber (1) according to any one of claims 1-4, wherein the housing (5) is provided with a cylindrical portion (16) surrounding the piston rod (4), and wherein an inner end of the cylindrical portion is provided with a radially inwards extending flange (17).', '8. A shock absorber (1) according to any one of the preceding claims, wherein an inner sealing unit (10) is arranged to seal between the piston rod (4) and the cylinder (2) by a second end opening (8), wherein a pressure balancing port may be formed in the outer surface of the piston rod such that a channel is formed past an inner sealing unit (10), said, unit when the piston rod is in a specific position within the damper.', '9. A shock absorber (1) according to any one of the preceding claims, wherein the cylinder (2) is provided with an inner end cap (20) through which the piston rod (4) extends, and wherein the inner sealing unit (10) is configured to seal between the inner end cap (20) and the piston rod (4).']