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Publication numberWO1989003954 A3
Publication typeApplication
Application numberPCT/GB1988/000926
Publication date1 Jun 1989
Filing date21 Oct 1988
Priority date29 Oct 1987
Also published asWO1989003954A2
Publication numberPCT/1988/926, PCT/GB/1988/000926, PCT/GB/1988/00926, PCT/GB/88/000926, PCT/GB/88/00926, PCT/GB1988/000926, PCT/GB1988/00926, PCT/GB1988000926, PCT/GB198800926, PCT/GB88/000926, PCT/GB88/00926, PCT/GB88000926, PCT/GB8800926, WO 1989/003954 A3, WO 1989003954 A3, WO 1989003954A3, WO 8903954 A3, WO 8903954A3, WO-A3-1989003954, WO-A3-8903954, WO1989/003954A3, WO1989003954 A3, WO1989003954A3, WO8903954 A3, WO8903954A3
InventorsKeith Vernon Leigh-Monstevens, Leslie Paul Branum, David Lee Wrobleski
ApplicantAutomotive Products Plc
Export CitationBiBTeX, EndNote, RefMan
External Links: Patentscope, Espacenet
A seal
WO 1989003954 A3
Abstract
The seal (50) includes an axially forward portion (50a) defining radially inner and radially outer deflectable lip seals (50c, 50d) and an axially rearward portion (50b) defining radially outer and inner arcuate heel seals (50e, 50f). When positioned in an annular groove (43) in a piston (30) and with the piston slidably received in the bore (27) of a cylinder (28), the annular seal (50) provides fluid pressure sealing at the deflectable lip seals, provides secondary fluid pressure sealing at the arcuate heel seals, provides air sealing at the arcuate heel seals, and functions at the arcuate heel seals to preclude the entry of contaminants into the sealing interfaces. The seal is especially effective when employed in a hydraulic pressure cylinder of the centre feed type since it allows the usage of a single annular seal positioned in a singular annular groove in the piston.
Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
GB810625A * Title not available
GB860090A * Title not available
GB1142265A * Title not available
GB2012392A * Title not available
GB2102898A * Title not available
US2700561 *7 Jan 194925 Jan 1955Ernest J SvensonSealing means
Classifications
International ClassificationB60T11/236, F16J15/32
Cooperative ClassificationB60T11/236, F16J15/3236
European ClassificationB60T11/236, F16J15/32B7B
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